mirror of
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feat(platform): standalone HTTP Bot adapter (server-to-server) (#2274)
* docs(platform): add HTTP Bot adapter design (RFC)
Standalone server-to-server HTTP adapter for driving a pipeline from external
systems (LangBot Space ticketing et al). Inbound via the existing unified
webhook route; outbound via signed callback POSTs. Preserves pipeline-native
N->1 aggregation and 1->M multi-reply without a long-lived WebSocket.
No core changes required (router/aggregator/pipeline untouched).
* feat(platform): add standalone HTTP Bot adapter
A first-class, vendor-neutral message-platform adapter (http_bot) for
server-to-server integrations (LangBot Space ticketing et al). Drives a
pipeline over plain HTTP with no long-lived connection:
- Inbound: signed POST to the existing unified webhook route /bots/<uuid>,
carrying a caller-defined session_id mapped to the LangBot launcher id via
get_launcher_id -> per-session isolation. Preserves pipeline-native N->1
aggregation for free.
- Outbound: each reply_message / reply_message_chunk becomes one signed
callback POST to the config-only callback_url, delivered in per-session
sequence order with retry/backoff -> 1->M multi-reply.
- Sub-paths: /reset (drop a session) and /sync (block for the collapsed reply).
- Auth: symmetric HMAC-SHA256 both directions (timestamp + replay window),
no JWT/Turnstile, no socket.
Decisions: callback URL is config-only (SSRF closed); reset + sync shipped;
Python + TS reference clients shipped (signing verified byte-identical 3-way).
No core changes: the unified webhook router, aggregator, query pool and
pipeline are untouched. Adapter is auto-discovered from platform/sources/.
Adds:
src/langbot/pkg/platform/sources/http_bot.{py,yaml,svg}
src/langbot/pkg/platform/sources/http_bot_signing.py
docs/platforms/http-bot.md, docs/http-bot-openapi.json
examples/http-bot/{client.py,client.ts,README.md}
Updates docs/HTTP_BOT_ADAPTER_DESIGN.md (status: implemented).
* docs(examples): add interactive HTTP Bot playground (browser debug console)
A single-file aiohttp web app (examples/http-bot/playground.py) that lets you
chat with a RUNNING http_bot bot from the browser and watch the protocol live:
signed inbound POST -> 202 ack -> 1->M signed callbacks streamed back via SSE,
with a debug panel showing the signature, HTTP status, and per-callback
sequence/verification. Light LangBot-styled UI.
On startup it reads the API key + http_bot bot from data/langbot.db and points
the bot's callback_url + secrets back at itself via the LangBot API (live
reload, no restart). README updated with a playground section.
* docs(examples): add Chinese README for http-bot reference clients
* style(platform): use </> code icon for http_bot adapter logo
* docs(examples): point http-bot guide links to docs.langbot.app
* style(platform): make http_bot icon a transparent monochrome </> so WebUI tints it like other adapters
* Revert to colorful </> badge for http_bot icon (WebUI renders it as-is)
This commit is contained in:
Junyan Chin
@@ -0,0 +1,575 @@
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# HTTP Bot Adapter — Design Document
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> Status: **Implemented** · Branch: `feat/http-bot-adapter` · Author: LangBot core
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>
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> A first-class, **standalone** message-platform adapter (`http_bot`) that lets
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> any external system (e.g. LangBot Space ticketing, an internal back-office, a
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> CRM, a custom web app) talk to a LangBot pipeline over plain HTTP — **inbound**
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> by POSTing messages in, **outbound** by receiving replies on a callback URL —
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> with full support for the pipeline's native N→1 aggregation and 1→M
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> multi-reply semantics, and **without** holding a long-lived WebSocket
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> connection.
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>
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> **Shipped in this branch:**
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> - `src/langbot/pkg/platform/sources/http_bot.yaml` — adapter manifest (auto-discovered)
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> - `src/langbot/pkg/platform/sources/http_bot.py` — `HttpBotAdapter`
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> - `src/langbot/pkg/platform/sources/http_bot_signing.py` — HMAC helpers
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> - `src/langbot/pkg/platform/sources/http_bot.svg` — icon
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> - `docs/platforms/http-bot.md` — integration guide
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> - `docs/http-bot-openapi.json` — machine-readable contract
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> - `examples/http-bot/` — Python + TypeScript reference clients
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>
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> **Final decisions (resolving the original open questions):**
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> 1. Callback URL is **config-only** — never accepted per-message (SSRF closed).
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> 2. **Session reset is provided** — `POST /bots/<uuid>/reset` keyed by `session_id`.
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> 3. Reference **clients are provided** — `examples/http-bot/client.py` + `client.ts`.
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> 4. **Sync convenience mode is included** — `POST /bots/<uuid>/sync` (opt-in, lossy).
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---
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## 1. Background & Motivation
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### 1.1 The concrete need
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LangBot Space wants to use a LangBot pipeline as the brain for **ticket
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handling**. The integration is **server-to-server**: Space's backend pushes a
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user's ticket messages into LangBot and renders LangBot's replies back into the
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ticket thread.
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This interaction is **not** request/response shaped:
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- **N → 1**: a user may fire several messages in a row ("the app crashed" …
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"when I click export" … "here's a screenshot"). The pipeline's
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**message aggregation** feature should debounce and merge these into one turn.
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- **1 → N**: a single turn may yield **multiple** outbound messages — a tool/
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function call narrating progress, a plugin emitting several cards, a streamed
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answer split into chunks.
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### 1.2 Why the existing options don't fit
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LangBot today exposes exactly one externally-reachable way to drive a pipeline
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that is **not** tied to a specific IM vendor: the **WebSocket** path
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(`/api/v1/pipelines/<uuid>/ws/connect` for dashboard debug, and
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`/api/v1/embed/<bot_uuid>/ws/connect` for the embeddable web widget).
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For a server-to-server integration the WebSocket path has real friction:
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| Problem | Detail |
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|---|---|
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| Long-lived connection | Caller must maintain a socket, heartbeats, and reconnect logic for what is fundamentally a fire-and-collect workload. |
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| Session identity | Inbound messages are keyed by the transient `connection_id` (`websocket_{connection_id}`); the caller **cannot supply a stable, business-meaningful session id** (e.g. a ticket number). Multi-ticket isolation is not expressible. |
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| Auth mismatch | The debug socket is gated by the **dashboard JWT** (must not be handed to an external service); the embed socket is gated by **Cloudflare Turnstile** (a *browser* human-check that a backend cannot satisfy). Neither is a server-to-server credential. |
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| In-memory, single-process state | Session history lives in process memory and is lost on restart. |
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> **Key realisation.** The N→1 / 1→M behaviour the caller wants is **not**
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> provided by WebSocket — it is provided by the **pipeline** (aggregation +
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> the adapter being free to call `reply_message` any number of times). It is
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> therefore **transport-independent**. We can deliver the exact same semantics
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> over a far lighter HTTP transport.
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### 1.3 Why a *new, standalone* adapter (not a refactor of an existing one)
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The brief is explicit: **do not reuse / fork an existing vendor adapter.** The
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vendor adapters (`lark`, `wecom`, `qqofficial`, `slack`, …) carry vendor-specific
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signature schemes, payload shapes, and message-segment mappings. Bending one of
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them into a "generic" mode would couple a public integration surface to one
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vendor's quirks and make the developer experience worse for everyone.
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Instead we ship `http_bot` as a clean, independent adapter whose **entire
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contract is LangBot's own** — documented, versioned, and designed front-to-back
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around *integrator* developer experience.
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---
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## 2. Goals & Non-Goals
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### Goals
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- **G1** A standalone `http_bot` adapter, selectable like any other platform
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adapter in the dashboard, with its own config schema and docs.
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- **G2** **Inbound**: external systems POST messages to a stable LangBot URL,
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carrying a **caller-defined `session_id`** that maps 1:1 to a LangBot session.
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- **G3** **Outbound**: LangBot delivers each reply by POSTing to a
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caller-configured **callback URL**; one turn may produce **many** callbacks.
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- **G4** Preserve pipeline-native **N→1 aggregation** and **1→M multi-reply**.
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- **G5** Server-to-server **auth**: shared-secret HMAC request signing both
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directions (no JWT, no Turnstile, no long-lived socket).
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- **G6** **Great DX**: copy-pasteable curl, a tiny reference client, an OpenAPI
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fragment, idempotency, clear error envelope, and a local echo-server recipe.
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### Non-Goals
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- Not replacing or deprecating the WebSocket / embed widget path (that remains
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the right tool for *browser*, real-time, streaming chat UIs).
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- Not a synchronous "one request → one response" RPC (explicitly rejected: it
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cannot express 1→M; see §9 for the optional sync convenience mode).
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- No built-in message **persistence/replay** in v1 (callbacks are at-least-once
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best-effort; durability is the caller's responsibility — see §8).
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- No multi-tenant API-key management UI in v1 (one secret per bot; see §11).
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---
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## 3. How LangBot routes a message (the parts we plug into)
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Understanding the existing flow is what makes this adapter cheap. A message
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flows through these stages (verified against current `master`):
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```
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INBOUND OUTBOUND
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external POST ─┐ ┌─ reply_message()
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▼ │ reply_message_chunk()
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POST /bots/<bot_uuid> (unified webhook router, AuthType.NONE)
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│ webhooks.py → adapter.handle_unified_webhook(bot_uuid, path, request)
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▼ │
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HttpBotAdapter.handle_unified_webhook │ (called 0..N times
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• verify HMAC signature │ per turn by the
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• parse {session_id, message[]} │ pipeline / plugins)
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• build FriendMessage / GroupMessage │
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• fire registered listener ───────────────┐ │
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│ │ │
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▼ ▼ │
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botmgr.on_friend_message / on_group_message │
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• (optional) webhook_pusher fan-out │
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• msg_aggregator.add_message(...) ── N→1 debounce ──►│
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│ │
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▼ │
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query_pool → pipeline.run() ─── invokes adapter ─────┘
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reply methods 1..M times
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```
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Two framework facts we rely on:
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1. **N→1 aggregation is free.** `botmgr` hands every inbound event to
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`self.ap.msg_aggregator.add_message(...)`, which debounces per
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`session_id` and merges consecutive messages into one pipeline turn
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(`pkg/pipeline/aggregator.py`). The adapter does nothing special.
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2. **1→M is free.** The pipeline (and any plugin in the chain) calls
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`adapter.reply_message()` / `reply_message_chunk()` **as many times as it
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wants** per turn. The adapter's only job is to deliver each call outward.
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For `http_bot` that means: **one outbound callback POST per call.**
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3. **A unified inbound route already exists.** `WebhookRouterGroup`
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(`pkg/api/http/controller/groups/webhooks.py`) maps
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`POST /bots/<bot_uuid>[/<path>]` (auth `NONE`) to
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`adapter.handle_unified_webhook(bot_uuid, path, request)`. `http_bot`
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implements that method and is reachable **without registering any new
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route** — it does its own signature verification, exactly like the vendor
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webhook adapters do.
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> Net new code is essentially: one `http_bot.py` adapter, one `http_bot.yaml`
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> schema, signing helpers, and docs. No router, aggregator, or pipeline changes.
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---
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## 4. Architecture Overview
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```
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┌────────────────────┐ (1) inbound: POST signed message
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│ External system │ ──────────────────────────────────────────────► ┌──────────────────────┐
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│ (LangBot Space, │ POST /bots/<bot_uuid> │ LangBot │
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│ CRM, web app …) │ X-LB-Signature, X-LB-Timestamp │ │
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│ │ { session_id, message:[...] } │ HttpBotAdapter │
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│ - callback server │ ◄────────────────────────────────────────────── │ (platform/sources) │
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│ (receives │ (4) outbound: POST signed reply(s) │ │
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│ replies) │ POST <callback_url> │ pipeline + aggregator│
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└────────────────────┘ X-LB-Signature, X-LB-Timestamp └──────────────────────┘
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{ session_id, sequence, is_final,
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message:[...] } (sent 1..M times)
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```
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- The adapter is **stateless across requests** at the HTTP layer; session
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continuity is carried by `session_id` and resolved by LangBot's normal
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session manager.
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- **Inbound** and **outbound** are **independent HTTP exchanges**. LangBot does
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not answer the inbound POST with the pipeline result; it `202 Accepts` it and
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later POSTs the reply(s) to the callback URL. This is what makes 1→M natural.
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---
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## 5. Configuration Schema (`http_bot.yaml`)
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Follows the existing `MessagePlatformAdapter` manifest convention (cf.
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`slack.yaml`). Fields:
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| field | type | required | purpose |
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|---|---|---|---|
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| `inbound_secret` | string (secret) | yes | HMAC key the **caller** uses to sign inbound POSTs; LangBot verifies. |
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| `callback_url` | string (url) | no* | Where LangBot POSTs replies. *Optional if the caller supplies `callback_url` per-message (see §6.1); a static default lives here. |
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| `outbound_secret` | string (secret) | no | HMAC key LangBot uses to sign outbound callbacks; caller verifies. Defaults to `inbound_secret` if empty. |
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| `default_session_type` | enum `person`/`group` | no | Default when a message omits `session_type`. Default `person`. |
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| `signature_required` | bool | no | If `false`, skip inbound signature check (dev only; logs a warning). Default `true`. |
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| `callback_timeout` | int (seconds) | no | Per-callback HTTP timeout. Default `15`. |
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| `callback_max_retries` | int | no | Retries on 5xx/timeout with backoff. Default `3`. |
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| `webhook_url` | webhook-url (display) | — | Read-only field rendering the inbound URL `…/bots/<bot_uuid>` for copy-paste, like other webhook adapters. |
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Manifest sketch (i18n labels elided for brevity):
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```yaml
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apiVersion: v1
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kind: MessagePlatformAdapter
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metadata:
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name: http_bot
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label: { en_US: "HTTP Bot", zh_Hans: "HTTP 通用接入" }
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description:
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en_US: "Integrate any backend over plain HTTP. Push messages in, receive replies on a callback URL. Server-to-server, no long-lived connection."
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zh_Hans: "通过 HTTP 接入任意后端系统。推入消息、在回调地址接收回复。面向服务间集成，无需长连接。"
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icon: http_bot.svg
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spec:
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categories: [popular, global]
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help_links:
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zh: https://docs.langbot.app/zh/platforms/http-bot
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en: https://docs.langbot.app/en/platforms/http-bot
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config:
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- { name: inbound_secret, type: string, required: true, default: "" }
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- { name: callback_url, type: string, required: false, default: "" }
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- { name: outbound_secret, type: string, required: false, default: "" }
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- { name: default_session_type, type: select, required: false, default: "person",
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options: [person, group] }
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- { name: signature_required, type: boolean, required: false, default: true }
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- { name: callback_timeout, type: integer, required: false, default: 15 }
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- { name: callback_max_retries, type: integer, required: false, default: 3 }
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- { name: webhook_url, type: webhook-url, required: false, default: "" }
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execution:
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python:
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path: ./http_bot.py
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attr: HttpBotAdapter
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```
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---
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## 6. The HTTP Contract (this is the DX surface)
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### 6.1 Inbound — push a message into LangBot
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```
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POST /bots/{bot_uuid}
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Content-Type: application/json
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X-LB-Timestamp: 1718000000
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X-LB-Signature: sha256=<hex hmac>
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X-LB-Idempotency-Key: <uuid> # optional, dedup window
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```
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Body:
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```jsonc
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{
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"session_id": "ticket-10293", // REQUIRED. Caller-defined. Maps 1:1 to a LangBot session.
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"session_type": "person", // optional, "person" | "group"; default from config
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"sender": { // optional metadata, surfaced to pipeline/plugins
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"id": "user-5567",
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"name": "Alice"
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},
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"message": [ // REQUIRED. A LangBot MessageChain (list of segments).
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{ "type": "Plain", "text": "Export keeps failing on the dashboard." },
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{ "type": "Image", "url": "https://.../screenshot.png" }
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]
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}
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```
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Response (LangBot does **not** block on the pipeline):
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```jsonc
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// 202 Accepted
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{
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"code": 0,
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"msg": "accepted",
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"data": {
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"session_id": "ticket-10293",
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"accepted_message_id": "in_01H....", // server-assigned id for this inbound message
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"aggregating": true // true if buffered by the aggregator
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}
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}
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```
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**N→1 in practice.** Fire three POSTs with the same `session_id` inside the
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aggregation window → the pipeline runs **once** with the three messages merged.
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No special flag needed; this is the aggregator's default behaviour when enabled
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on the pipeline.
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### 6.2 Outbound — LangBot delivers replies to your callback
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For each `reply_message` / `reply_message_chunk` the pipeline emits, LangBot
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POSTs to `callback_url`:
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|
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```
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POST {callback_url}
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Content-Type: application/json
|
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X-LB-Timestamp: 1718000001
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X-LB-Signature: sha256=<hex hmac over body>
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```
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Body:
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```jsonc
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{
|
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"session_id": "ticket-10293", // echoes the inbound session
|
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"reply_to": "in_01H....", // the inbound message id this answers
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"sequence": 1, // 1-based ordinal within this turn (for 1→M ordering)
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"is_final": false, // false for intermediate/streamed parts
|
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"stream": false, // true when this is a streamed chunk
|
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"message": [
|
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{ "type": "Plain", "text": "Looking into it — checking your export logs…" }
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],
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"timestamp": "2026-06-22T09:00:01Z"
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}
|
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```
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**1→M in practice.** A turn that fires a function call then a final answer
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produces e.g.:
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||||
|
||||
```
|
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POST callback → { sequence: 1, is_final: false, message: ["Checking logs…"] }
|
||||
POST callback → { sequence: 2, is_final: false, message: ["Found 2 failed exports."] }
|
||||
POST callback → { sequence: 3, is_final: true, message: ["Fixed. Try again now."] }
|
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```
|
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|
||||
The caller stitches by `session_id` + `sequence`, and knows the turn is complete
|
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when `is_final: true` arrives.
|
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|
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Your callback endpoint should return `200` quickly. A non-2xx triggers retry
|
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with backoff (`callback_max_retries`).
|
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|
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### 6.3 Error envelope (inbound)
|
||||
|
||||
Consistent, machine-readable; never leak internals:
|
||||
|
||||
```jsonc
|
||||
{ "code": 40101, "msg": "invalid signature", "data": null }
|
||||
```
|
||||
|
||||
| HTTP | code | meaning |
|
||||
|---|---|---|
|
||||
| 202 | 0 | accepted |
|
||||
| 400 | 40001 | malformed body / missing `session_id` or `message` |
|
||||
| 401 | 40101 | bad/expired signature |
|
||||
| 403 | 40301 | bot disabled |
|
||||
| 404 | 40401 | bot_uuid not found / not an `http_bot` adapter |
|
||||
| 409 | 40901 | duplicate idempotency key (already accepted) |
|
||||
| 413 | 41301 | message too large |
|
||||
| 500 | 50001 | internal error |
|
||||
|
||||
---
|
||||
|
||||
## 7. Signing scheme (both directions)
|
||||
|
||||
Symmetric, dependency-free HMAC-SHA256 — trivial to implement in any language.
|
||||
|
||||
```
|
||||
signing_string = "{timestamp}.{raw_request_body}"
|
||||
signature = "sha256=" + hex(HMAC_SHA256(secret, signing_string))
|
||||
```
|
||||
|
||||
Verification rules:
|
||||
|
||||
- Reject if `|now - timestamp| > 300s` (replay window).
|
||||
- Constant-time compare (`hmac.compare_digest`).
|
||||
- Inbound verified with `inbound_secret`; outbound signed with
|
||||
`outbound_secret` (falls back to `inbound_secret`).
|
||||
- `signature_required: false` bypasses verification **and logs a warning** —
|
||||
intended only for local development behind a trusted network.
|
||||
|
||||
Reference (Python, ~6 lines):
|
||||
|
||||
```python
|
||||
import hmac, hashlib, time
|
||||
|
||||
def sign(secret: str, body: bytes, ts: int | None = None) -> tuple[str, str]:
|
||||
ts = ts or int(time.time())
|
||||
mac = hmac.new(secret.encode(), f"{ts}.".encode() + body, hashlib.sha256)
|
||||
return str(ts), "sha256=" + mac.hexdigest()
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 8. Delivery semantics & reliability
|
||||
|
||||
- **Inbound**: `202 Accepted` means *queued*, not *processed*. Use
|
||||
`X-LB-Idempotency-Key` to make client retries safe (dedup window, e.g. 10 min).
|
||||
- **Outbound**: **at-least-once**, best-effort. Retries on timeout/5xx with
|
||||
exponential backoff up to `callback_max_retries`. Callbacks for one
|
||||
`session_id` are delivered **in `sequence` order** (serialised per session);
|
||||
across sessions they may interleave.
|
||||
- **No persistence in v1**: if LangBot restarts mid-turn, in-flight callbacks
|
||||
may be lost. Durable replay is deferred (see §13). Callers needing exactly-once
|
||||
should dedup on `(session_id, reply_to, sequence)`.
|
||||
- **Backpressure**: the adapter must not block the pipeline on slow callbacks —
|
||||
outbound POSTs run on a per-session ordered queue with the configured timeout.
|
||||
|
||||
---
|
||||
|
||||
## 9. Optional: synchronous convenience mode (v1.1, behind a flag)
|
||||
|
||||
Some simple callers genuinely want "POST a message, get the reply in the HTTP
|
||||
response" and don't care about streaming/multi-part. We can offer an **opt-in**
|
||||
sync endpoint that internally waits for `is_final` and **collapses** all 1→M
|
||||
parts into one array:
|
||||
|
||||
```
|
||||
POST /bots/{bot_uuid}/sync → 200 { session_id, message: [ ...all parts concatenated... ] }
|
||||
```
|
||||
|
||||
Implemented by attaching a per-request future that resolves on the final reply,
|
||||
with a hard timeout. This is a **convenience wrapper** over the same machinery,
|
||||
explicitly documented as lossy for streaming/ordering. Not in v1 core.
|
||||
|
||||
---
|
||||
|
||||
## 10. Adapter implementation sketch (`platform/sources/http_bot.py`)
|
||||
|
||||
Implements `AbstractMessagePlatformAdapter`. Key methods:
|
||||
|
||||
```python
|
||||
class HttpBotAdapter(AbstractMessagePlatformAdapter):
|
||||
listeners: dict = pydantic.Field(default_factory=dict, exclude=True)
|
||||
|
||||
# --- inbound -------------------------------------------------------
|
||||
async def handle_unified_webhook(self, bot_uuid, path, request):
|
||||
body = await request.get_body()
|
||||
if self.config.get("signature_required", True):
|
||||
if not self._verify(request, body):
|
||||
return jsonify({"code": 40101, "msg": "invalid signature"}), 401
|
||||
data = json.loads(body)
|
||||
session_id = data["session_id"] # caller-defined identity
|
||||
session_type = data.get("session_type", self.config.get("default_session_type", "person"))
|
||||
chain = MessageChain.model_validate(data["message"])
|
||||
event = self._build_event(session_type, session_id, data.get("sender"), chain)
|
||||
# remember where to send replies for this session
|
||||
self._callback_for[session_id] = data.get("callback_url") or self.config.get("callback_url")
|
||||
# fire the registered listener → botmgr → msg_aggregator (N→1) → pipeline
|
||||
if type(event) in self.listeners:
|
||||
asyncio.create_task(self.listeners[type(event)](event, self))
|
||||
return jsonify({"code": 0, "msg": "accepted",
|
||||
"data": {"session_id": session_id, "accepted_message_id": event.message_id}}), 202
|
||||
|
||||
# --- outbound (called 1..M times per turn by the pipeline) ---------
|
||||
async def reply_message(self, message_source, message, quote_origin=False):
|
||||
return await self._post_callback(message_source, message, is_final=True, stream=False)
|
||||
|
||||
async def reply_message_chunk(self, message_source, bot_message, message,
|
||||
quote_origin=False, is_final=False):
|
||||
return await self._post_callback(message_source, message, is_final=is_final, stream=True)
|
||||
|
||||
async def is_stream_output_supported(self) -> bool:
|
||||
return True
|
||||
|
||||
def register_listener(self, event_type, func): self.listeners[event_type] = func
|
||||
def unregister_listener(self, event_type, func): self.listeners.pop(event_type, None)
|
||||
async def run_async(self): pass # nothing to poll; purely webhook-driven
|
||||
async def kill(self): pass
|
||||
```
|
||||
|
||||
`_post_callback` resolves the session's callback URL, assigns the next
|
||||
`sequence`, signs the body, and enqueues an ordered, retrying POST.
|
||||
|
||||
Session→callback mapping is kept in a small in-memory dict keyed by
|
||||
`session_id` (acceptable for v1; a turn's callback URL is captured at inbound
|
||||
time so replies always have a destination even if config later changes).
|
||||
|
||||
---
|
||||
|
||||
## 11. Security considerations
|
||||
|
||||
- **Inbound route is `AuthType.NONE`** at the framework level (same as all
|
||||
webhook adapters) — the adapter **must** enforce HMAC itself. Default
|
||||
`signature_required: true`.
|
||||
- **Timestamp window** (±300s) + idempotency key blunt replay.
|
||||
- **SSRF on callback_url**: validate scheme (`https` in prod), and consider an
|
||||
allow-list / block of private CIDRs since LangBot initiates the POST. Document
|
||||
this; enforce in code where feasible.
|
||||
- **Secret storage**: secrets live in the bot's `adapter_config` like every
|
||||
other adapter credential; surfaced as `type: string`/secret in the dashboard.
|
||||
- **One secret per bot** in v1. Per-caller key rotation / multiple keys is a
|
||||
future enhancement (§13).
|
||||
|
||||
---
|
||||
|
||||
## 12. Developer Experience (explicit deliverables)
|
||||
|
||||
The whole point of a standalone adapter is that **integrating is pleasant**. v1
|
||||
ships:
|
||||
|
||||
1. **`docs/platforms/http-bot.md`** — task-oriented integration guide:
|
||||
create the bot → copy inbound URL → set secret → stand up a callback
|
||||
endpoint → send first message → handle 1→M.
|
||||
2. **Copy-paste curl** for the first message (with a working signing one-liner).
|
||||
3. **Reference clients** (≤50 LOC each) in `examples/http-bot/`:
|
||||
`client.py` (push + a Flask/Quart callback receiver) and `client.ts`.
|
||||
4. **OpenAPI fragment** `docs/http-bot-openapi.json` describing inbound +
|
||||
callback shapes, so integrators can codegen.
|
||||
5. **Local echo recipe**: a one-command callback server that prints every
|
||||
reply, so a developer sees N→1 and 1→M working in under five minutes.
|
||||
6. **Postman/Hoppscotch collection** (nice-to-have).
|
||||
|
||||
DX acceptance check: *a developer who has never seen LangBot can, from the docs
|
||||
alone, push a message and observe a multi-part reply on their callback within
|
||||
10 minutes.*
|
||||
|
||||
### Quickstart (curl)
|
||||
|
||||
```bash
|
||||
BOT=https://your-langbot/bots/2f1c....
|
||||
SECRET=supersecret
|
||||
BODY='{"session_id":"ticket-10293","message":[{"type":"Plain","text":"hello"}]}'
|
||||
TS=$(date +%s)
|
||||
SIG="sha256=$(printf '%s.%s' "$TS" "$BODY" | openssl dgst -sha256 -hmac "$SECRET" -r | cut -d' ' -f1)"
|
||||
curl -sS -X POST "$BOT" \
|
||||
-H "Content-Type: application/json" \
|
||||
-H "X-LB-Timestamp: $TS" \
|
||||
-H "X-LB-Signature: $SIG" \
|
||||
-d "$BODY"
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 13. Future work
|
||||
|
||||
- **Durable outbound queue** (persist + replay across restarts; exactly-once).
|
||||
- **Per-caller API keys** with rotation and scopes (multi-tenant Space usage).
|
||||
- **Sync convenience endpoint** (§9) once core is stable.
|
||||
- **Server-Sent Events outbound option** for callers that *do* want a stream but
|
||||
not a full duplex socket — single GET, server pushes chunks.
|
||||
- **Dashboard "test console"** for `http_bot` (send a message, watch callbacks)
|
||||
mirroring the existing WebSocket debug panel.
|
||||
|
||||
---
|
||||
|
||||
## 14. Rollout / task breakdown
|
||||
|
||||
| # | Task | Touches |
|
||||
|---|---|---|
|
||||
| 1 | `http_bot.yaml` manifest + icon | `platform/sources/` |
|
||||
| 2 | `HttpBotAdapter` (inbound verify, event build, outbound queue) | `platform/sources/http_bot.py` |
|
||||
| 3 | Signing helper module (shared) | `platform/sources/` or `utils/` |
|
||||
| 4 | i18n strings (en/zh/ja) | adapter yaml + web locale |
|
||||
| 5 | Integration docs `docs/platforms/http-bot.md` | `docs/` |
|
||||
| 6 | OpenAPI fragment + reference clients | `docs/`, `examples/http-bot/` |
|
||||
| 7 | Tests: signature verify, N→1 aggregation, 1→M ordering, retry | `tests/` |
|
||||
| 8 | (opt) SSRF guard for callback_url | adapter |
|
||||
|
||||
No changes required to: the unified webhook router, the aggregator, the query
|
||||
pool, or the pipeline. That is the design's main payoff.
|
||||
|
||||
---
|
||||
|
||||
## 15. Resolved decisions
|
||||
|
||||
1. **Callback URL trust** — **config-only.** The inbound message may not carry a
|
||||
`callback_url`; replies always go to the bot-config URL. Closes the SSRF
|
||||
vector where a leaked inbound secret could redirect replies.
|
||||
2. **Session lifecycle** — **`POST /bots/<uuid>/reset`** (body `{session_id,
|
||||
session_type?}`) drops the matching session from the session manager; the
|
||||
next message starts a fresh conversation. Implemented via sub-path routing in
|
||||
`handle_unified_webhook`.
|
||||
3. **Group semantics** — for `session_type: group`, `session_id` is the group/
|
||||
launcher id; `sender.id` (and optional `sender.group_name`) identify the
|
||||
member. A Space ticket maps to one `session_id`.
|
||||
4. **Backpressure** — bounded per-session outbound queue (maxlen 1000); on
|
||||
overflow the oldest reply is dropped and a warning logged, so a persistently
|
||||
down callback can never exhaust memory.
|
||||
|
||||
### Still open / deferred (see §13)
|
||||
|
||||
- Durable outbound queue (persist + replay across restarts).
|
||||
- Per-caller API keys with rotation/scopes for multi-tenant Space usage.
|
||||
- SSE outbound option and a dashboard test console.
|
||||
@@ -0,0 +1,198 @@
|
||||
{
|
||||
"openapi": "3.0.3",
|
||||
"info": {
|
||||
"title": "LangBot HTTP Bot Adapter",
|
||||
"version": "1.0.0",
|
||||
"description": "Server-to-server HTTP integration for a LangBot pipeline. Inbound messages are POSTed to the unified webhook route; replies are delivered to a configured callback URL (one POST per reply part). All requests are HMAC-SHA256 signed. See docs/platforms/http-bot.md."
|
||||
},
|
||||
"paths": {
|
||||
"/bots/{bot_uuid}": {
|
||||
"post": {
|
||||
"summary": "Push a message into the pipeline (fire-and-collect)",
|
||||
"description": "Returns 202 immediately. Replies arrive asynchronously on the configured callback URL. Reuse the same session_id within the aggregation window to merge multiple messages into one turn (N->1).",
|
||||
"parameters": [
|
||||
{ "$ref": "#/components/parameters/BotUuid" },
|
||||
{ "$ref": "#/components/parameters/Timestamp" },
|
||||
{ "$ref": "#/components/parameters/Signature" },
|
||||
{ "$ref": "#/components/parameters/Idempotency" }
|
||||
],
|
||||
"requestBody": {
|
||||
"required": true,
|
||||
"content": { "application/json": { "schema": { "$ref": "#/components/schemas/InboundMessage" } } }
|
||||
},
|
||||
"responses": {
|
||||
"202": {
|
||||
"description": "Accepted (queued for the pipeline)",
|
||||
"content": { "application/json": { "schema": { "$ref": "#/components/schemas/AcceptedResponse" } } }
|
||||
},
|
||||
"400": { "$ref": "#/components/responses/Error" },
|
||||
"401": { "$ref": "#/components/responses/Error" },
|
||||
"409": { "$ref": "#/components/responses/Error" },
|
||||
"413": { "$ref": "#/components/responses/Error" }
|
||||
}
|
||||
}
|
||||
},
|
||||
"/bots/{bot_uuid}/sync": {
|
||||
"post": {
|
||||
"summary": "Push a message and wait for the collapsed reply",
|
||||
"description": "Blocking convenience mode. Waits for is_final and returns all reply parts collapsed into one array. Lossy (no sequence/streaming). One in-flight sync per session_id.",
|
||||
"parameters": [
|
||||
{ "$ref": "#/components/parameters/BotUuid" },
|
||||
{ "$ref": "#/components/parameters/Timestamp" },
|
||||
{ "$ref": "#/components/parameters/Signature" }
|
||||
],
|
||||
"requestBody": {
|
||||
"required": true,
|
||||
"content": { "application/json": { "schema": { "$ref": "#/components/schemas/InboundMessage" } } }
|
||||
},
|
||||
"responses": {
|
||||
"200": {
|
||||
"description": "The collapsed reply",
|
||||
"content": { "application/json": { "schema": { "$ref": "#/components/schemas/SyncResponse" } } }
|
||||
},
|
||||
"400": { "$ref": "#/components/responses/Error" },
|
||||
"401": { "$ref": "#/components/responses/Error" }
|
||||
}
|
||||
}
|
||||
},
|
||||
"/bots/{bot_uuid}/reset": {
|
||||
"post": {
|
||||
"summary": "Reset a session's conversation",
|
||||
"parameters": [
|
||||
{ "$ref": "#/components/parameters/BotUuid" },
|
||||
{ "$ref": "#/components/parameters/Timestamp" },
|
||||
{ "$ref": "#/components/parameters/Signature" }
|
||||
],
|
||||
"requestBody": {
|
||||
"required": true,
|
||||
"content": {
|
||||
"application/json": {
|
||||
"schema": {
|
||||
"type": "object",
|
||||
"required": ["session_id"],
|
||||
"properties": {
|
||||
"session_id": { "type": "string" },
|
||||
"session_type": { "type": "string", "enum": ["person", "group"] }
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"responses": {
|
||||
"200": { "description": "Reset done" },
|
||||
"400": { "$ref": "#/components/responses/Error" },
|
||||
"401": { "$ref": "#/components/responses/Error" }
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"components": {
|
||||
"parameters": {
|
||||
"BotUuid": {
|
||||
"name": "bot_uuid", "in": "path", "required": true,
|
||||
"schema": { "type": "string", "format": "uuid" }
|
||||
},
|
||||
"Timestamp": {
|
||||
"name": "X-LB-Timestamp", "in": "header", "required": true,
|
||||
"description": "Unix seconds; rejected if more than +/-300s from server time.",
|
||||
"schema": { "type": "string" }
|
||||
},
|
||||
"Signature": {
|
||||
"name": "X-LB-Signature", "in": "header", "required": true,
|
||||
"description": "sha256=<hex> of HMAC-SHA256(secret, \"{timestamp}.\" + raw_body).",
|
||||
"schema": { "type": "string" }
|
||||
},
|
||||
"Idempotency": {
|
||||
"name": "X-LB-Idempotency-Key", "in": "header", "required": false,
|
||||
"description": "Dedup key; a repeat within the dedup window returns 409.",
|
||||
"schema": { "type": "string" }
|
||||
}
|
||||
},
|
||||
"schemas": {
|
||||
"Segment": {
|
||||
"type": "object",
|
||||
"required": ["type"],
|
||||
"properties": {
|
||||
"type": { "type": "string", "enum": ["Plain", "Image", "Voice", "File", "At", "Quote"] },
|
||||
"text": { "type": "string", "description": "For type=Plain." },
|
||||
"url": { "type": "string", "description": "For media types." },
|
||||
"base64": { "type": "string", "description": "For media types (data URI or raw base64)." }
|
||||
}
|
||||
},
|
||||
"InboundMessage": {
|
||||
"type": "object",
|
||||
"required": ["session_id", "message"],
|
||||
"properties": {
|
||||
"session_id": { "type": "string", "description": "Caller-defined; maps 1:1 to a LangBot session." },
|
||||
"session_type": { "type": "string", "enum": ["person", "group"], "default": "person" },
|
||||
"sender": {
|
||||
"type": "object",
|
||||
"properties": {
|
||||
"id": { "type": "string" },
|
||||
"name": { "type": "string" },
|
||||
"group_name": { "type": "string", "description": "For session_type=group." }
|
||||
}
|
||||
},
|
||||
"message": { "type": "array", "items": { "$ref": "#/components/schemas/Segment" } }
|
||||
}
|
||||
},
|
||||
"AcceptedResponse": {
|
||||
"type": "object",
|
||||
"properties": {
|
||||
"code": { "type": "integer", "example": 0 },
|
||||
"msg": { "type": "string", "example": "accepted" },
|
||||
"data": {
|
||||
"type": "object",
|
||||
"properties": {
|
||||
"session_id": { "type": "string" },
|
||||
"accepted_message_id": { "type": "string", "example": "in_01H..." },
|
||||
"aggregating": { "type": "boolean" }
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"SyncResponse": {
|
||||
"type": "object",
|
||||
"properties": {
|
||||
"code": { "type": "integer", "example": 0 },
|
||||
"msg": { "type": "string", "example": "ok" },
|
||||
"data": {
|
||||
"type": "object",
|
||||
"properties": {
|
||||
"session_id": { "type": "string" },
|
||||
"reply_to": { "type": "string" },
|
||||
"message": { "type": "array", "items": { "$ref": "#/components/schemas/Segment" } }
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
"Callback": {
|
||||
"type": "object",
|
||||
"description": "Delivered by LangBot to your callback_url, one POST per reply part. Signed with the outbound secret.",
|
||||
"properties": {
|
||||
"session_id": { "type": "string" },
|
||||
"reply_to": { "type": "string", "description": "The accepted_message_id this answers." },
|
||||
"sequence": { "type": "integer", "description": "1-based ordinal within the turn." },
|
||||
"is_final": { "type": "boolean", "description": "True on the last part of the turn." },
|
||||
"stream": { "type": "boolean" },
|
||||
"message": { "type": "array", "items": { "$ref": "#/components/schemas/Segment" } },
|
||||
"timestamp": { "type": "string", "format": "date-time" }
|
||||
}
|
||||
},
|
||||
"ErrorEnvelope": {
|
||||
"type": "object",
|
||||
"properties": {
|
||||
"code": { "type": "integer", "example": 40101 },
|
||||
"msg": { "type": "string", "example": "invalid signature: signature_mismatch" },
|
||||
"data": { "nullable": true }
|
||||
}
|
||||
}
|
||||
},
|
||||
"responses": {
|
||||
"Error": {
|
||||
"description": "Error envelope",
|
||||
"content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorEnvelope" } } }
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,256 @@
|
||||
# HTTP Bot Adapter — Integration Guide
|
||||
|
||||
Integrate **any backend system** with a LangBot pipeline over plain HTTP. Push
|
||||
messages in via a signed webhook; receive replies on a callback URL. No
|
||||
long-lived connection, full support for message **aggregation** (many inbound
|
||||
messages merged into one turn) and **multi-part replies** (one turn → many
|
||||
outbound messages).
|
||||
|
||||
This is the right adapter for **server-to-server** integrations — ticketing
|
||||
systems, CRMs, internal tools, custom web backends. (For an in-browser,
|
||||
real-time chat widget, use the embeddable Web Page Bot instead.)
|
||||
|
||||
> **5-minute goal:** stand up a callback receiver, send a message, and watch a
|
||||
> multi-part reply arrive — using the reference client in
|
||||
> [`examples/http-bot/`](../../examples/http-bot/).
|
||||
|
||||
---
|
||||
|
||||
## 1. Mental model
|
||||
|
||||
```
|
||||
Your backend ──(1) POST signed message──► LangBot /bots/<bot_uuid>
|
||||
(pipeline runs: aggregate → think → reply)
|
||||
Your callback ◄─(2) POST signed reply(s)── LangBot one POST per reply part
|
||||
```
|
||||
|
||||
- **(1) Inbound** is *fire-and-collect*: LangBot answers `202 Accepted`
|
||||
immediately and does **not** return the pipeline result on that response.
|
||||
- **(2) Outbound** replies arrive later as separate signed POSTs to your
|
||||
`callback_url`. A single turn may produce **several** callbacks (e.g. a tool
|
||||
call narration followed by the final answer).
|
||||
- Everything is keyed by a **`session_id` you choose** (e.g. a ticket number).
|
||||
Each `session_id` maps to one isolated LangBot conversation.
|
||||
|
||||
---
|
||||
|
||||
## 2. Create the bot
|
||||
|
||||
1. In the LangBot dashboard, add a bot and choose the **HTTP Bot** platform.
|
||||
2. Fill in the config:
|
||||
|
||||
| Field | Required | Notes |
|
||||
|---|---|---|
|
||||
| **Inbound Signing Secret** | yes | Your backend signs inbound requests with this. |
|
||||
| **Outbound Callback URL** | yes | Where LangBot POSTs replies. **Config-only** — cannot be overridden per message (SSRF protection). |
|
||||
| **Outbound Signing Secret** | no | LangBot signs callbacks with this; defaults to the inbound secret. |
|
||||
| **Default Session Type** | no | `person` (default) or `group`. |
|
||||
| **Require Inbound Signature** | no | Keep `true` in production. |
|
||||
| **Callback Timeout / Max Retries** | no | Defaults: 15s, 3 retries. |
|
||||
|
||||
3. Bind the bot to a **pipeline** and **enable** it.
|
||||
4. Copy the **Inbound Webhook URL** shown in the config — it looks like
|
||||
`https://your-langbot/bots/<bot_uuid>`.
|
||||
|
||||
---
|
||||
|
||||
## 3. The signature scheme
|
||||
|
||||
Both directions use the same dependency-free HMAC-SHA256 scheme:
|
||||
|
||||
```
|
||||
signing_string = "{timestamp}." + raw_body_bytes
|
||||
signature = "sha256=" + hex(HMAC_SHA256(secret, signing_string))
|
||||
```
|
||||
|
||||
Sent as headers:
|
||||
|
||||
| Header | Meaning |
|
||||
|---|---|
|
||||
| `X-LB-Timestamp` | Unix seconds. Rejected if more than **±300s** from server time. |
|
||||
| `X-LB-Signature` | `sha256=<hex>` over `"{timestamp}." + body`. |
|
||||
| `X-LB-Idempotency-Key` | *(optional, inbound)* dedup key; retries with the same key return `409`. |
|
||||
|
||||
Verify outbound callbacks the same way, using the **outbound** secret (or the
|
||||
inbound secret if you left it blank).
|
||||
|
||||
A six-line reference implementation is in `examples/http-bot/client.py`
|
||||
(`sign()` / `verify()`); a Node/TS version is in `client.ts`.
|
||||
|
||||
---
|
||||
|
||||
## 4. Send your first message (curl)
|
||||
|
||||
```bash
|
||||
BOT="https://your-langbot/bots/<bot_uuid>"
|
||||
SECRET="your-inbound-secret"
|
||||
BODY='{"session_id":"ticket-10293","message":[{"type":"Plain","text":"Export keeps failing on the dashboard."}]}'
|
||||
TS=$(date +%s)
|
||||
SIG="sha256=$(printf '%s.%s' "$TS" "$BODY" | openssl dgst -sha256 -hmac "$SECRET" -r | cut -d' ' -f1)"
|
||||
|
||||
curl -sS -X POST "$BOT" \
|
||||
-H "Content-Type: application/json" \
|
||||
-H "X-LB-Timestamp: $TS" \
|
||||
-H "X-LB-Signature: $SIG" \
|
||||
-d "$BODY"
|
||||
# -> 202 {"code":0,"msg":"accepted","data":{"session_id":"ticket-10293","accepted_message_id":"in_...","aggregating":true}}
|
||||
```
|
||||
|
||||
The reply(s) will be POSTed to your configured callback URL shortly after.
|
||||
|
||||
---
|
||||
|
||||
## 5. Inbound request format
|
||||
|
||||
`POST /bots/{bot_uuid}`
|
||||
|
||||
```jsonc
|
||||
{
|
||||
"session_id": "ticket-10293", // REQUIRED. Your stable id. Maps 1:1 to a LangBot session.
|
||||
"session_type": "person", // optional: "person" | "group"; default from config
|
||||
"sender": { // optional metadata, surfaced to the pipeline/plugins
|
||||
"id": "user-5567",
|
||||
"name": "Alice"
|
||||
},
|
||||
"message": [ // REQUIRED. A LangBot MessageChain (array of segments).
|
||||
{ "type": "Plain", "text": "Export keeps failing on the dashboard." },
|
||||
{ "type": "Image", "url": "https://example.com/screenshot.png" }
|
||||
]
|
||||
}
|
||||
```
|
||||
|
||||
**Message segments.** Text uses `{"type":"Plain","text":"..."}`. Images use
|
||||
`{"type":"Image","url":"..."}` (or `base64`). Other supported types: `Voice`,
|
||||
`File`, `At`, `Quote`.
|
||||
|
||||
> Note: the callback URL is **not** accepted in the body — it is taken only from
|
||||
> bot config. This is deliberate (prevents an attacker who obtains the inbound
|
||||
> secret from redirecting replies to an arbitrary host).
|
||||
|
||||
### Aggregation (N → 1)
|
||||
|
||||
If your pipeline has **message aggregation** enabled, send several messages with
|
||||
the **same `session_id`** within the aggregation window and they are merged into
|
||||
**one** pipeline turn. No special flag — just reuse the `session_id`.
|
||||
|
||||
---
|
||||
|
||||
## 6. Outbound callback format
|
||||
|
||||
LangBot POSTs each reply part to your `callback_url`:
|
||||
|
||||
```jsonc
|
||||
{
|
||||
"session_id": "ticket-10293", // echoes the inbound session
|
||||
"reply_to": "in_01H...", // the accepted_message_id this answers
|
||||
"sequence": 1, // 1-based ordinal within this turn
|
||||
"is_final": false, // true on the last part of the turn
|
||||
"stream": false, // true for streamed chunks
|
||||
"message": [ { "type": "Plain", "text": "Looking into it…" } ],
|
||||
"timestamp": "2026-06-22T09:00:01Z"
|
||||
}
|
||||
```
|
||||
|
||||
Your endpoint should return `2xx` quickly. Non-2xx / timeout → LangBot retries
|
||||
with exponential backoff (up to `callback_max_retries`).
|
||||
|
||||
### Multi-part replies (1 → M)
|
||||
|
||||
One turn may emit multiple callbacks, delivered **in `sequence` order** for a
|
||||
given session:
|
||||
|
||||
```
|
||||
seq=1 is_final=false "Checking your export logs…"
|
||||
seq=2 is_final=false "Found 2 failed exports."
|
||||
seq=3 is_final=true "Fixed — please try again."
|
||||
```
|
||||
|
||||
Stitch by `session_id` + `sequence`; the turn is complete when
|
||||
`is_final: true` arrives.
|
||||
|
||||
---
|
||||
|
||||
## 7. Reset a session
|
||||
|
||||
Start a fresh conversation for a `session_id` (drops history):
|
||||
|
||||
```
|
||||
POST /bots/{bot_uuid}/reset
|
||||
{ "session_id": "ticket-10293", "session_type": "person" }
|
||||
→ 200 { "code":0, "msg":"reset", "data": { "session_id":"ticket-10293", "removed": true } }
|
||||
```
|
||||
|
||||
Signed exactly like an inbound message.
|
||||
|
||||
---
|
||||
|
||||
## 8. Synchronous convenience mode
|
||||
|
||||
If you don't need streaming/multi-part and just want one reply back on the same
|
||||
HTTP call, POST to `/sync`. LangBot waits for the turn to finish and returns all
|
||||
parts **collapsed** into one array:
|
||||
|
||||
```
|
||||
POST /bots/{bot_uuid}/sync
|
||||
{ "session_id": "ticket-10293", "message": [ { "type":"Plain", "text":"hi" } ] }
|
||||
→ 200 { "code":0, "msg":"ok",
|
||||
"data": { "session_id":"ticket-10293", "reply_to":"in_...",
|
||||
"message": [ {"type":"Plain","text":"..."}, ... ] } }
|
||||
```
|
||||
|
||||
This is **lossy** (you lose `sequence` / streaming boundaries) and blocks up to
|
||||
`callback_timeout × 4` seconds. Prefer the callback model for anything
|
||||
real-time or multi-part. Only one in-flight `/sync` per `session_id`.
|
||||
|
||||
---
|
||||
|
||||
## 9. Error envelope
|
||||
|
||||
```jsonc
|
||||
{ "code": 40101, "msg": "invalid signature: signature_mismatch", "data": null }
|
||||
```
|
||||
|
||||
| HTTP | code | meaning |
|
||||
|---|---|---|
|
||||
| 202 | 0 | accepted |
|
||||
| 400 | 40001 | malformed body / missing `session_id` or `message` |
|
||||
| 401 | 40101 | bad/expired signature |
|
||||
| 409 | 40901 | duplicate idempotency key |
|
||||
| 413 | 41301 | message too large (>1 MiB) |
|
||||
| 500 | 50001 | internal error |
|
||||
|
||||
---
|
||||
|
||||
## 10. Try it end-to-end in 5 minutes
|
||||
|
||||
```bash
|
||||
cd examples/http-bot
|
||||
pip install flask requests
|
||||
|
||||
# Terminal 1 — your callback receiver (point the bot's callback_url here, e.g. via a tunnel):
|
||||
python client.py serve --port 8900 --secret SHARED_SECRET
|
||||
|
||||
# Terminal 2 — push a message:
|
||||
python client.py push \
|
||||
--url https://your-langbot/bots/<bot_uuid> \
|
||||
--secret SHARED_SECRET \
|
||||
--session ticket-1 \
|
||||
--text "hello"
|
||||
```
|
||||
|
||||
Watch Terminal 1 print each reply part (`[part ]` / `[FINAL]`) with its
|
||||
sequence number — that's 1→M working, signatures verified.
|
||||
|
||||
A machine-readable contract is in
|
||||
[`docs/http-bot-openapi.json`](../http-bot-openapi.json).
|
||||
|
||||
---
|
||||
|
||||
## 11. Security checklist
|
||||
|
||||
- Keep **Require Inbound Signature** on in production.
|
||||
- Use **HTTPS** callback URLs; the URL is config-only (no per-message override).
|
||||
- Treat the secrets like passwords; rotate via the dashboard.
|
||||
- The inbound route is unauthenticated at the framework level **by design** —
|
||||
security comes entirely from the HMAC signature, so never disable it on a
|
||||
public deployment.
|
||||
@@ -0,0 +1,75 @@
|
||||
# HTTP Bot Adapter — Reference Clients
|
||||
|
||||
> English | [中文](./README.zh.md)
|
||||
|
||||
Minimal, dependency-light clients for the LangBot **HTTP Bot** platform adapter.
|
||||
They show the whole loop: signing a request, pushing a message, and receiving
|
||||
multi-part replies on a callback endpoint.
|
||||
|
||||
Full guide: [docs.langbot.app — HTTP Bot](https://docs.langbot.app/en/usage/platforms/http-bot).
|
||||
Machine-readable contract: [`docs/http-bot-openapi.json`](../../docs/http-bot-openapi.json).
|
||||
|
||||
## Files
|
||||
|
||||
| File | What it is |
|
||||
|---|---|
|
||||
| `playground.py` | **Interactive browser debug console** — a single-file web app you open in a browser to chat with a running `http_bot` bot and watch signing / 202 / callbacks live. Zero extra deps. |
|
||||
| `client.py` | Python client + Flask callback receiver (`pip install flask requests`). |
|
||||
| `client.ts` | TypeScript/Node 18+ client + callback receiver, **zero deps** (`npx tsx client.ts`). |
|
||||
|
||||
All three implement the identical HMAC-SHA256 scheme
|
||||
(`sha256=hex(HMAC(secret, "{timestamp}." + body))`) — verified byte-for-byte
|
||||
against the adapter.
|
||||
|
||||
## Interactive playground (recommended first run)
|
||||
|
||||
A self-contained web console: type a message in your browser, it is signed and
|
||||
POSTed to a **running** `http_bot` bot, and the bot's replies stream back into
|
||||
the page — with a debug panel showing the signature, the `202` ack, and each
|
||||
callback's `sequence` / signature-verification.
|
||||
|
||||
```bash
|
||||
# From the LangBot repo root, with the backend already running:
|
||||
PUBLIC_IP=<your-host-ip> ./.venv/bin/python examples/http-bot/playground.py
|
||||
# then open http://<your-host-ip>:8920/
|
||||
```
|
||||
|
||||
On startup it reads the LangBot API key + the `http_bot` bot from
|
||||
`data/langbot.db`, and configures that bot (inbound/outbound secret +
|
||||
`callback_url`) to point back at itself via the LangBot API — the bot reloads
|
||||
live, no restart needed. Requirements: an enabled `http_bot` bot bound to a
|
||||
working pipeline, and port `8920` reachable from your browser.
|
||||
|
||||
Env knobs: `PUBLIC_IP` (default `127.0.0.1`), `PLAYGROUND_PORT` (default `8920`).
|
||||
|
||||
## Headless clients
|
||||
|
||||
```bash
|
||||
# Python — Terminal 1: callback receiver (your callback_url target)
|
||||
python client.py serve --port 8900 --secret SHARED_SECRET
|
||||
|
||||
# Python — Terminal 2: push a message
|
||||
python client.py push --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-1 --text "hello"
|
||||
|
||||
# blocking sync mode
|
||||
python client.py sync --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-1 --text "hello"
|
||||
|
||||
# reset a session
|
||||
python client.py reset --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-1
|
||||
```
|
||||
|
||||
```bash
|
||||
# TypeScript (Node 18+)
|
||||
npx tsx client.ts serve 8900 SHARED_SECRET
|
||||
npx tsx client.ts push https://your-langbot/bots/<BOT_UUID> SHARED_SECRET ticket-1 "hello"
|
||||
```
|
||||
|
||||
When the bot replies, the receiver prints each part with its `sequence` and an
|
||||
`[FINAL]` marker on the last one — that's the 1→M multi-reply model in action.
|
||||
|
||||
> The bot's `callback_url` must be reachable from LangBot. For local testing,
|
||||
> expose your receiver with a tunnel (cloudflared / ngrok) and set that URL in
|
||||
> the bot config.
|
||||
@@ -0,0 +1,71 @@
|
||||
# HTTP Bot 适配器 —— 参考客户端
|
||||
|
||||
> [English](./README.md) | 中文
|
||||
|
||||
面向 LangBot **HTTP Bot** 平台适配器的极简、低依赖客户端示例。
|
||||
它们完整展示了整条链路:对请求签名、推送一条消息、在回调端点接收
|
||||
1→M 的多段回复。
|
||||
|
||||
完整指南:[docs.langbot.app —— HTTP Bot](https://docs.langbot.app/zh/usage/platforms/http-bot)。
|
||||
机器可读的接口契约:[`docs/http-bot-openapi.json`](../../docs/http-bot-openapi.json)。
|
||||
|
||||
## 文件清单
|
||||
|
||||
| 文件 | 是什么 |
|
||||
|---|---|
|
||||
| `playground.py` | **浏览器交互式调试台** —— 单文件 Web 应用,在浏览器里和一个运行中的 `http_bot` bot 对话,实时观察签名 / 202 / 回调。零额外依赖。 |
|
||||
| `client.py` | Python 客户端 + Flask 回调接收端(`pip install flask requests`)。 |
|
||||
| `client.ts` | TypeScript/Node 18+ 客户端 + 回调接收端,**零依赖**(`npx tsx client.ts`)。 |
|
||||
|
||||
三者实现完全一致的 HMAC-SHA256 签名方案
|
||||
(`sha256=hex(HMAC(secret, "{timestamp}." + body))`)—— 已与适配器逐字节比对验证。
|
||||
|
||||
## 交互式 playground(推荐先跑这个)
|
||||
|
||||
一个自包含的 Web 控制台:在浏览器里输入消息,它会被签名并 POST 给一个
|
||||
**运行中**的 `http_bot` bot,bot 的回复会流式回到页面上 —— 调试面板会显示
|
||||
签名、`202` 确认,以及每条回调的 `sequence` / 签名验证结果。
|
||||
|
||||
```bash
|
||||
# 在 LangBot 仓库根目录、后端已启动的前提下:
|
||||
PUBLIC_IP=<你的主机IP> ./.venv/bin/python examples/http-bot/playground.py
|
||||
# 然后打开 http://<你的主机IP>:8920/
|
||||
```
|
||||
|
||||
启动时它会从 `data/langbot.db` 读取 LangBot API key 和 `http_bot` bot,
|
||||
并通过 LangBot API 把该 bot 配好(入站/出站密钥 + `callback_url`)指回自己 ——
|
||||
bot 会热加载,无需重启。前提:有一个已启用、绑定了可用 pipeline 的
|
||||
`http_bot` bot,且端口 `8920` 能从你的浏览器访问到。
|
||||
|
||||
可调环境变量:`PUBLIC_IP`(默认 `127.0.0.1`)、`PLAYGROUND_PORT`(默认 `8920`)。
|
||||
|
||||
## 无头客户端
|
||||
|
||||
```bash
|
||||
# Python —— 终端 1:回调接收端(你的 callback_url 指向它)
|
||||
python client.py serve --port 8900 --secret SHARED_SECRET
|
||||
|
||||
# Python —— 终端 2:推送一条消息
|
||||
python client.py push --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-1 --text "hello"
|
||||
|
||||
# 阻塞式同步模式
|
||||
python client.py sync --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-1 --text "hello"
|
||||
|
||||
# 重置一个会话
|
||||
python client.py reset --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-1
|
||||
```
|
||||
|
||||
```bash
|
||||
# TypeScript(Node 18+)
|
||||
npx tsx client.ts serve 8900 SHARED_SECRET
|
||||
npx tsx client.ts push https://your-langbot/bots/<BOT_UUID> SHARED_SECRET ticket-1 "hello"
|
||||
```
|
||||
|
||||
当 bot 回复时,接收端会逐条打印,带上各自的 `sequence`,并在最后一条标记
|
||||
`[FINAL]` —— 这就是 1→M 多段回复模型的实际效果。
|
||||
|
||||
> bot 的 `callback_url` 必须能从 LangBot 访问到。本地测试时,可用隧道
|
||||
> (cloudflared / ngrok)把你的接收端暴露出去,并把那个 URL 填进 bot 配置。
|
||||
@@ -0,0 +1,167 @@
|
||||
#!/usr/bin/env python3
|
||||
"""LangBot HTTP Bot adapter — reference client (Python).
|
||||
|
||||
Two things in one file:
|
||||
|
||||
1. ``push()`` / ``push_sync()`` — send a message into a LangBot ``http_bot`` bot.
|
||||
2. A tiny Flask callback receiver that verifies signatures and prints replies,
|
||||
so you can watch N->1 aggregation and 1->M multi-reply working live.
|
||||
|
||||
Usage
|
||||
-----
|
||||
pip install flask requests
|
||||
|
||||
# Terminal 1 — start the callback receiver (this is your callback_url):
|
||||
python client.py serve --port 8900 --secret SHARED_SECRET
|
||||
|
||||
# Terminal 2 — push a message (async; reply lands on the receiver):
|
||||
python client.py push \
|
||||
--url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET \
|
||||
--session ticket-10293 \
|
||||
--text "Export keeps failing on the dashboard."
|
||||
|
||||
# Or push and block for the collapsed reply (sync convenience mode):
|
||||
python client.py sync --url https://your-langbot/bots/<BOT_UUID> \
|
||||
--secret SHARED_SECRET --session ticket-10293 --text "hi"
|
||||
|
||||
The signing scheme is HMAC-SHA256 over ``"{timestamp}." + raw_body``; see
|
||||
``sign()`` below — it is intentionally tiny and easy to port.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import argparse
|
||||
import hashlib
|
||||
import hmac
|
||||
import json
|
||||
import sys
|
||||
import time
|
||||
import uuid
|
||||
|
||||
HEADER_TIMESTAMP = 'X-LB-Timestamp'
|
||||
HEADER_SIGNATURE = 'X-LB-Signature'
|
||||
HEADER_IDEMPOTENCY = 'X-LB-Idempotency-Key'
|
||||
REPLAY_WINDOW = 300
|
||||
|
||||
|
||||
def sign(secret: str, body: bytes, timestamp: int | None = None) -> tuple[str, str]:
|
||||
"""Return (timestamp, signature) for *body*."""
|
||||
ts = str(timestamp if timestamp is not None else int(time.time()))
|
||||
mac = hmac.new(secret.encode(), f'{ts}.'.encode() + body, hashlib.sha256)
|
||||
return ts, 'sha256=' + mac.hexdigest()
|
||||
|
||||
|
||||
def verify(secret: str, body: bytes, timestamp: str | None, signature: str | None) -> bool:
|
||||
"""Verify an inbound signature (used by the callback receiver)."""
|
||||
if not timestamp or not signature:
|
||||
return False
|
||||
try:
|
||||
if abs(int(time.time()) - int(float(timestamp))) > REPLAY_WINDOW:
|
||||
return False
|
||||
except ValueError:
|
||||
return False
|
||||
_, expected = sign(secret, body, int(float(timestamp)))
|
||||
return hmac.compare_digest(expected, signature)
|
||||
|
||||
|
||||
def _post(url: str, secret: str, payload: dict, idempotency: bool = True):
|
||||
import requests
|
||||
|
||||
body = json.dumps(payload, ensure_ascii=False).encode()
|
||||
ts, sig = sign(secret, body)
|
||||
headers = {
|
||||
'Content-Type': 'application/json',
|
||||
HEADER_TIMESTAMP: ts,
|
||||
HEADER_SIGNATURE: sig,
|
||||
}
|
||||
if idempotency:
|
||||
headers[HEADER_IDEMPOTENCY] = uuid.uuid4().hex
|
||||
resp = requests.post(url, data=body, headers=headers, timeout=30)
|
||||
print(f'-> {resp.status_code} {resp.text}')
|
||||
return resp
|
||||
|
||||
|
||||
def push(url: str, secret: str, session: str, text: str, session_type: str = 'person'):
|
||||
"""Fire-and-collect: returns 202 immediately; reply arrives on your callback."""
|
||||
payload = {
|
||||
'session_id': session,
|
||||
'session_type': session_type,
|
||||
'message': [{'type': 'Plain', 'text': text}],
|
||||
}
|
||||
return _post(url.rstrip('/'), secret, payload)
|
||||
|
||||
|
||||
def push_sync(url: str, secret: str, session: str, text: str, session_type: str = 'person'):
|
||||
"""Blocking convenience: POST to /sync and get the collapsed reply back."""
|
||||
payload = {
|
||||
'session_id': session,
|
||||
'session_type': session_type,
|
||||
'message': [{'type': 'Plain', 'text': text}],
|
||||
}
|
||||
resp = _post(url.rstrip('/') + '/sync', secret, payload, idempotency=False)
|
||||
return resp
|
||||
|
||||
|
||||
def reset(url: str, secret: str, session: str, session_type: str = 'person'):
|
||||
"""Reset a session's conversation (next message starts fresh)."""
|
||||
payload = {'session_id': session, 'session_type': session_type}
|
||||
return _post(url.rstrip('/') + '/reset', secret, payload, idempotency=False)
|
||||
|
||||
|
||||
def serve(port: int, secret: str):
|
||||
"""Run a callback receiver that verifies signatures and prints replies."""
|
||||
from flask import Flask, request
|
||||
|
||||
app = Flask(__name__)
|
||||
|
||||
@app.route('/', methods=['POST'])
|
||||
def recv():
|
||||
raw = request.get_data()
|
||||
ok = verify(secret, raw, request.headers.get(HEADER_TIMESTAMP), request.headers.get(HEADER_SIGNATURE))
|
||||
if not ok:
|
||||
print('!! signature verification FAILED — rejecting')
|
||||
return {'error': 'bad signature'}, 401
|
||||
data = json.loads(raw)
|
||||
text_parts = [c.get('text', '') for c in data.get('message', []) if c.get('type') == 'Plain']
|
||||
marker = 'FINAL' if data.get('is_final') else 'part '
|
||||
print(
|
||||
f'[{marker}] session={data["session_id"]} seq={data["sequence"]} '
|
||||
f'reply_to={data.get("reply_to")}: {" ".join(text_parts)}'
|
||||
)
|
||||
return {'ok': True}
|
||||
|
||||
print(f'callback receiver listening on http://0.0.0.0:{port}/ (Ctrl-C to stop)')
|
||||
app.run(host='0.0.0.0', port=port)
|
||||
|
||||
|
||||
def main(argv=None):
|
||||
p = argparse.ArgumentParser(description='LangBot HTTP Bot reference client')
|
||||
sub = p.add_subparsers(dest='cmd', required=True)
|
||||
|
||||
sp = sub.add_parser('serve', help='run the callback receiver')
|
||||
sp.add_argument('--port', type=int, default=8900)
|
||||
sp.add_argument('--secret', required=True)
|
||||
|
||||
for name in ('push', 'sync', 'reset'):
|
||||
c = sub.add_parser(name)
|
||||
c.add_argument('--url', required=True, help='https://host/bots/<BOT_UUID>')
|
||||
c.add_argument('--secret', required=True)
|
||||
c.add_argument('--session', required=True)
|
||||
c.add_argument('--session-type', default='person', choices=['person', 'group'])
|
||||
if name != 'reset':
|
||||
c.add_argument('--text', required=True)
|
||||
|
||||
args = p.parse_args(argv)
|
||||
if args.cmd == 'serve':
|
||||
serve(args.port, args.secret)
|
||||
elif args.cmd == 'push':
|
||||
push(args.url, args.secret, args.session, args.text, args.session_type)
|
||||
elif args.cmd == 'sync':
|
||||
push_sync(args.url, args.secret, args.session, args.text, args.session_type)
|
||||
elif args.cmd == 'reset':
|
||||
reset(args.url, args.secret, args.session, args.session_type)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
sys.exit(main())
|
||||
@@ -0,0 +1,123 @@
|
||||
/**
|
||||
* LangBot HTTP Bot adapter — reference client (TypeScript / Node 18+).
|
||||
*
|
||||
* Zero runtime dependencies (uses global `fetch`, `crypto`, and `http`).
|
||||
*
|
||||
* - `push()` : fire-and-collect; reply lands on your callback URL.
|
||||
* - `pushSync()` : POST /sync and await the collapsed reply.
|
||||
* - `reset()` : reset a session's conversation.
|
||||
* - `startReceiver()` : a callback server that verifies signatures and logs
|
||||
* replies, so you can watch N->1 and 1->M live.
|
||||
*
|
||||
* Run the demos:
|
||||
* npx tsx client.ts serve 8900 SHARED_SECRET
|
||||
* npx tsx client.ts push https://host/bots/<UUID> SHARED_SECRET ticket-1 "hello"
|
||||
* npx tsx client.ts sync https://host/bots/<UUID> SHARED_SECRET ticket-1 "hello"
|
||||
* npx tsx client.ts reset https://host/bots/<UUID> SHARED_SECRET ticket-1
|
||||
*/
|
||||
|
||||
import { createHmac, randomUUID, timingSafeEqual } from 'node:crypto';
|
||||
import { createServer } from 'node:http';
|
||||
|
||||
const HEADER_TIMESTAMP = 'X-LB-Timestamp';
|
||||
const HEADER_SIGNATURE = 'X-LB-Signature';
|
||||
const HEADER_IDEMPOTENCY = 'X-LB-Idempotency-Key';
|
||||
const REPLAY_WINDOW = 300;
|
||||
|
||||
/** Compute the `sha256=<hex>` signature over `"{ts}." + body`. */
|
||||
export function sign(secret: string, body: Buffer | string, timestamp?: number): [string, string] {
|
||||
const ts = String(timestamp ?? Math.floor(Date.now() / 1000));
|
||||
const buf = typeof body === 'string' ? Buffer.from(body) : body;
|
||||
const mac = createHmac('sha256', secret).update(Buffer.concat([Buffer.from(`${ts}.`), buf])).digest('hex');
|
||||
return [ts, `sha256=${mac}`];
|
||||
}
|
||||
|
||||
/** Verify an inbound signature (used by the callback receiver). */
|
||||
export function verify(secret: string, body: Buffer, timestamp?: string, signature?: string): boolean {
|
||||
if (!timestamp || !signature) return false;
|
||||
if (Math.abs(Math.floor(Date.now() / 1000) - Number(timestamp)) > REPLAY_WINDOW) return false;
|
||||
const [, expected] = sign(secret, body, Number(timestamp));
|
||||
const a = Buffer.from(expected);
|
||||
const b = Buffer.from(signature);
|
||||
return a.length === b.length && timingSafeEqual(a, b);
|
||||
}
|
||||
|
||||
interface Segment { type: string; text?: string; url?: string; [k: string]: unknown }
|
||||
|
||||
async function post(url: string, secret: string, payload: object, idempotency = true) {
|
||||
const body = Buffer.from(JSON.stringify(payload));
|
||||
const [ts, sig] = sign(secret, body);
|
||||
const headers: Record<string, string> = {
|
||||
'Content-Type': 'application/json',
|
||||
[HEADER_TIMESTAMP]: ts,
|
||||
[HEADER_SIGNATURE]: sig,
|
||||
};
|
||||
if (idempotency) headers[HEADER_IDEMPOTENCY] = randomUUID();
|
||||
const resp = await fetch(url, { method: 'POST', headers, body });
|
||||
const text = await resp.text();
|
||||
console.log(`-> ${resp.status} ${text}`);
|
||||
return { status: resp.status, text };
|
||||
}
|
||||
|
||||
/** Fire-and-collect: 202 now, reply later on your callback URL. */
|
||||
export function push(url: string, secret: string, session: string, text: string, sessionType = 'person') {
|
||||
return post(url.replace(/\/$/, ''), secret, {
|
||||
session_id: session,
|
||||
session_type: sessionType,
|
||||
message: [{ type: 'Plain', text }] as Segment[],
|
||||
});
|
||||
}
|
||||
|
||||
/** Blocking convenience: POST /sync, get the collapsed reply. */
|
||||
export function pushSync(url: string, secret: string, session: string, text: string, sessionType = 'person') {
|
||||
return post(`${url.replace(/\/$/, '')}/sync`, secret, {
|
||||
session_id: session,
|
||||
session_type: sessionType,
|
||||
message: [{ type: 'Plain', text }] as Segment[],
|
||||
}, false);
|
||||
}
|
||||
|
||||
/** Reset a session's conversation. */
|
||||
export function reset(url: string, secret: string, session: string, sessionType = 'person') {
|
||||
return post(`${url.replace(/\/$/, '')}/reset`, secret, { session_id: session, session_type: sessionType }, false);
|
||||
}
|
||||
|
||||
/** Run a callback receiver that verifies signatures and prints replies. */
|
||||
export function startReceiver(port: number, secret: string) {
|
||||
const server = createServer((req, res) => {
|
||||
if (req.method !== 'POST') { res.writeHead(405).end(); return; }
|
||||
const chunks: Buffer[] = [];
|
||||
req.on('data', (c) => chunks.push(c));
|
||||
req.on('end', () => {
|
||||
const raw = Buffer.concat(chunks);
|
||||
const ok = verify(secret, raw, req.headers[HEADER_TIMESTAMP.toLowerCase()] as string,
|
||||
req.headers[HEADER_SIGNATURE.toLowerCase()] as string);
|
||||
if (!ok) {
|
||||
console.log('!! signature verification FAILED — rejecting');
|
||||
res.writeHead(401, { 'Content-Type': 'application/json' }).end(JSON.stringify({ error: 'bad signature' }));
|
||||
return;
|
||||
}
|
||||
const data = JSON.parse(raw.toString());
|
||||
const parts = (data.message as Segment[]).filter((c) => c.type === 'Plain').map((c) => c.text).join(' ');
|
||||
const marker = data.is_final ? 'FINAL' : 'part ';
|
||||
console.log(`[${marker}] session=${data.session_id} seq=${data.sequence} reply_to=${data.reply_to}: ${parts}`);
|
||||
res.writeHead(200, { 'Content-Type': 'application/json' }).end(JSON.stringify({ ok: true }));
|
||||
});
|
||||
});
|
||||
server.listen(port, () => console.log(`callback receiver listening on http://0.0.0.0:${port}/ (Ctrl-C to stop)`));
|
||||
}
|
||||
|
||||
// --- CLI ---
|
||||
const [cmd, ...rest] = process.argv.slice(2);
|
||||
if (cmd === 'serve') {
|
||||
startReceiver(Number(rest[0] ?? 8900), rest[1] ?? 'SHARED_SECRET');
|
||||
} else if (cmd === 'push') {
|
||||
push(rest[0], rest[1], rest[2], rest[3]);
|
||||
} else if (cmd === 'sync') {
|
||||
pushSync(rest[0], rest[1], rest[2], rest[3]);
|
||||
} else if (cmd === 'reset') {
|
||||
reset(rest[0], rest[1], rest[2]);
|
||||
} else if (cmd) {
|
||||
console.error(`unknown command: ${cmd}`);
|
||||
process.exit(1);
|
||||
}
|
||||
@@ -0,0 +1,349 @@
|
||||
#!/usr/bin/env python3
|
||||
"""LangBot HTTP Bot — interactive playground (public, browser-based).
|
||||
|
||||
This is a REAL end-to-end demo against the RUNNING LangBot instance on this
|
||||
host. It is NOT a mock and NOT an in-process import: every message you type in
|
||||
the browser is signed and POSTed to the live `http_bot` bot at
|
||||
http://127.0.0.1:5300/bots/<uuid>, and the bot's replies come back to this
|
||||
server's /callback endpoint over real HTTP, then stream to your browser via SSE.
|
||||
|
||||
What it does on startup:
|
||||
1. Reads the LangBot API key + the http_bot bot from data/langbot.db.
|
||||
2. Configures the bot via the LangBot API (PUT /api/v1/platform/bots/<uuid>):
|
||||
sets inbound_secret + outbound_secret + callback_url to point back here.
|
||||
(LangBot reloads the bot live — no server restart needed.)
|
||||
3. Serves a chat page on 0.0.0.0:<PORT> so you can open it from the internet.
|
||||
|
||||
Run: ./.venv/bin/python examples/http-bot/playground.py
|
||||
Then open: http://<this-host-public-ip>:<PORT>/
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import asyncio
|
||||
import json
|
||||
import os
|
||||
import sqlite3
|
||||
import sys
|
||||
|
||||
REPO = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..'))
|
||||
sys.path.insert(0, os.path.join(REPO, 'src'))
|
||||
|
||||
from aiohttp import web # noqa: E402
|
||||
import aiohttp # noqa: E402
|
||||
|
||||
from langbot.pkg.platform.sources import http_bot_signing as sg # noqa: E402
|
||||
|
||||
# ---- config -----------------------------------------------------------------
|
||||
LANGBOT_BASE = 'http://127.0.0.1:5300'
|
||||
DB_PATH = os.path.join(REPO, 'data', 'langbot.db')
|
||||
PUBLIC_IP = os.environ.get('PUBLIC_IP', '127.0.0.1')
|
||||
PORT = int(os.environ.get('PLAYGROUND_PORT', '8920'))
|
||||
SECRET = 'playground-shared-secret'
|
||||
|
||||
# SSE subscribers: list of asyncio.Queue
|
||||
subscribers: list[asyncio.Queue] = []
|
||||
|
||||
|
||||
def db_lookup() -> tuple[str, str]:
|
||||
"""Return (api_key, http_bot_uuid) from the LangBot DB."""
|
||||
db = sqlite3.connect(DB_PATH)
|
||||
db.row_factory = sqlite3.Row
|
||||
api_key = db.execute('SELECT key FROM api_keys LIMIT 1').fetchone()['key']
|
||||
bot = db.execute("SELECT uuid FROM bots WHERE adapter='http_bot' LIMIT 1").fetchone()
|
||||
if not bot:
|
||||
raise SystemExit('No http_bot bot found. Create one in the WebUI first.')
|
||||
return api_key, bot['uuid']
|
||||
|
||||
|
||||
async def configure_bot(api_key: str, bot_uuid: str, callback_url: str):
|
||||
"""Point the live bot at this playground via the LangBot API.
|
||||
|
||||
update_bot() runs a raw SQL UPDATE with whatever keys we send, so we send a
|
||||
MINIMAL payload: only adapter_config (built from scratch, not read back —
|
||||
the GET masks secrets). LangBot reloads + reruns the bot live.
|
||||
"""
|
||||
cfg = {
|
||||
'inbound_secret': SECRET,
|
||||
'outbound_secret': SECRET,
|
||||
'callback_url': callback_url,
|
||||
'signature_required': True,
|
||||
'default_session_type': 'person',
|
||||
'callback_timeout': 15,
|
||||
'callback_max_retries': 3,
|
||||
}
|
||||
async with aiohttp.ClientSession() as s:
|
||||
async with s.put(
|
||||
f'{LANGBOT_BASE}/api/v1/platform/bots/{bot_uuid}',
|
||||
headers={'Authorization': f'Bearer {api_key}', 'Content-Type': 'application/json'},
|
||||
json={'adapter_config': cfg},
|
||||
) as r:
|
||||
txt = await r.text()
|
||||
print(f'[configure] PUT adapter_config -> {r.status} {txt[:200]}')
|
||||
return r.status < 400
|
||||
|
||||
|
||||
async def broadcast(event: dict):
|
||||
for q in list(subscribers):
|
||||
try:
|
||||
q.put_nowait(event)
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
|
||||
# ---- HTTP handlers ----------------------------------------------------------
|
||||
async def index(request: web.Request):
|
||||
return web.Response(text=PAGE, content_type='text/html')
|
||||
|
||||
|
||||
async def send(request: web.Request):
|
||||
"""Browser -> here -> signed POST -> live LangBot bot."""
|
||||
body_in = await request.json()
|
||||
session_id = body_in.get('session_id') or 'playground-1'
|
||||
text = body_in.get('text', '')
|
||||
bot_uuid = request.app['bot_uuid']
|
||||
|
||||
payload = {
|
||||
'session_id': session_id,
|
||||
'sender': {'id': 'browser-user', 'name': 'You'},
|
||||
'message': [{'type': 'Plain', 'text': text}],
|
||||
}
|
||||
raw = json.dumps(payload, ensure_ascii=False).encode()
|
||||
ts, sig = sg.sign(SECRET, raw)
|
||||
url = f'{LANGBOT_BASE}/bots/{bot_uuid}'
|
||||
|
||||
# echo what we send to the browser timeline
|
||||
await broadcast(
|
||||
{'dir': 'out', 'kind': 'request', 'session_id': session_id, 'text': text, 'url': url, 'sig': sig[:24] + '…'}
|
||||
)
|
||||
|
||||
async with aiohttp.ClientSession() as s:
|
||||
async with s.post(
|
||||
url,
|
||||
data=raw,
|
||||
headers={
|
||||
'Content-Type': 'application/json',
|
||||
sg.HEADER_TIMESTAMP: ts,
|
||||
sg.HEADER_SIGNATURE: sig,
|
||||
},
|
||||
) as r:
|
||||
status = r.status
|
||||
try:
|
||||
jr = await r.json()
|
||||
except Exception:
|
||||
jr = {'raw': await r.text()}
|
||||
await broadcast({'dir': 'in', 'kind': 'ack', 'status': status, 'data': jr})
|
||||
return web.json_response({'status': status, 'data': jr})
|
||||
|
||||
|
||||
async def callback(request: web.Request):
|
||||
"""Live LangBot bot -> here. Verify signature, stream to browser."""
|
||||
raw = await request.read()
|
||||
ok, why = sg.verify(SECRET, raw, request.headers.get(sg.HEADER_TIMESTAMP), request.headers.get(sg.HEADER_SIGNATURE))
|
||||
data = json.loads(raw)
|
||||
text = ' '.join(c.get('text', '') for c in data.get('message', []) if c.get('type') == 'Plain')
|
||||
await broadcast(
|
||||
{
|
||||
'dir': 'in',
|
||||
'kind': 'reply',
|
||||
'session_id': data.get('session_id'),
|
||||
'sequence': data.get('sequence'),
|
||||
'is_final': data.get('is_final'),
|
||||
'sig_ok': ok,
|
||||
'sig_why': why,
|
||||
'text': text,
|
||||
}
|
||||
)
|
||||
return web.json_response({'ok': True})
|
||||
|
||||
|
||||
async def events(request: web.Request):
|
||||
"""SSE stream to the browser."""
|
||||
resp = web.StreamResponse(
|
||||
headers={
|
||||
'Content-Type': 'text/event-stream',
|
||||
'Cache-Control': 'no-cache',
|
||||
'Connection': 'keep-alive',
|
||||
'Access-Control-Allow-Origin': '*',
|
||||
}
|
||||
)
|
||||
await resp.prepare(request)
|
||||
q: asyncio.Queue = asyncio.Queue()
|
||||
subscribers.append(q)
|
||||
try:
|
||||
await resp.write(b': connected\n\n')
|
||||
while True:
|
||||
try:
|
||||
ev = await asyncio.wait_for(q.get(), timeout=15)
|
||||
await resp.write(f'data: {json.dumps(ev, ensure_ascii=False)}\n\n'.encode())
|
||||
except asyncio.TimeoutError:
|
||||
await resp.write(b': ping\n\n')
|
||||
except (asyncio.CancelledError, ConnectionResetError):
|
||||
pass
|
||||
finally:
|
||||
if q in subscribers:
|
||||
subscribers.remove(q)
|
||||
return resp
|
||||
|
||||
|
||||
PAGE = r"""<!doctype html>
|
||||
<html lang="zh"><head><meta charset="utf-8"/>
|
||||
<meta name="viewport" content="width=device-width,initial-scale=1"/>
|
||||
<title>LangBot HTTP Bot · 调试台</title>
|
||||
<style>
|
||||
:root{
|
||||
--bg:#f7f8fa; --panel:#ffffff; --line:#e8eaed; --ink:#1f2329; --mut:#8a909a;
|
||||
--brand:#2563eb; --brand-soft:#eef3ff; --ok:#16a34a; --bad:#dc2626; --code:#f3f4f6;
|
||||
}
|
||||
*{box-sizing:border-box}
|
||||
html,body{height:100%}
|
||||
body{margin:0;background:var(--bg);color:var(--ink);
|
||||
font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif}
|
||||
.top{height:52px;background:var(--panel);border-bottom:1px solid var(--line);
|
||||
display:flex;align-items:center;gap:10px;padding:0 18px}
|
||||
.logo{width:26px;height:26px;border-radius:7px;background:var(--brand);display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px}
|
||||
.top b{font-size:15px} .top .ver{font-size:12px;color:var(--mut)}
|
||||
.dot{width:8px;height:8px;border-radius:50%;background:#cbd2dc;display:inline-block;margin-right:5px;vertical-align:middle}
|
||||
.dot.on{background:var(--ok)} .dot.off{background:var(--bad)}
|
||||
.conn{margin-left:auto;font-size:12px;color:var(--mut)}
|
||||
.wrap{max-width:1080px;margin:0 auto;padding:18px;display:grid;grid-template-columns:1fr 360px;gap:16px}
|
||||
@media(max-width:880px){.wrap{grid-template-columns:1fr}}
|
||||
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;min-height:0}
|
||||
.card h3{margin:0;padding:12px 16px;font-size:13px;font-weight:600;color:#4b5563;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}
|
||||
.chat{height:62vh}
|
||||
.msgs{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
|
||||
.row{display:flex;flex-direction:column;gap:4px;max-width:82%}
|
||||
.row.me{align-self:flex-end;align-items:flex-end}
|
||||
.row.bot{align-self:flex-start}
|
||||
.bub{padding:9px 13px;border-radius:12px;white-space:pre-wrap;word-break:break-word}
|
||||
.me .bub{background:var(--brand);color:#fff;border-bottom-right-radius:3px}
|
||||
.bot .bub{background:#f1f3f6;color:var(--ink);border-bottom-left-radius:3px}
|
||||
.meta{font-size:11px;color:var(--mut)}
|
||||
.meta .ok{color:var(--ok)} .meta .bad{color:var(--bad)}
|
||||
.sys{align-self:center;font-size:12px;color:var(--mut);background:#f1f3f6;border-radius:8px;padding:4px 12px}
|
||||
.bar{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
|
||||
.bar input{flex:1;border:1px solid var(--line);border-radius:9px;padding:10px 12px;font-size:14px;outline:none}
|
||||
.bar input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
|
||||
.bar button{background:var(--brand);color:#fff;border:0;border-radius:9px;padding:0 18px;font-size:14px;font-weight:500;cursor:pointer}
|
||||
.bar button:disabled{opacity:.5;cursor:default}
|
||||
.side{height:62vh}
|
||||
.kv{padding:12px 16px;border-bottom:1px solid var(--line);font-size:12px}
|
||||
.kv .k{color:var(--mut)} .kv .v{color:var(--ink);word-break:break-all}
|
||||
.kv code{background:var(--code);border-radius:5px;padding:1px 5px;font-size:11px}
|
||||
.sessrow{display:flex;align-items:center;gap:8px;padding:10px 16px;border-bottom:1px solid var(--line);font-size:12px}
|
||||
.sessrow input{flex:1;border:1px solid var(--line);border-radius:7px;padding:5px 8px;font-size:12px}
|
||||
.sessrow button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:5px 9px;font-size:12px;cursor:pointer;color:#4b5563}
|
||||
.trace{flex:1;overflow:auto;padding:10px 12px;font:11px/1.55 ui-monospace,SFMono-Regular,Menlo,monospace}
|
||||
.ev{padding:6px 8px;border-radius:7px;margin-bottom:6px;border:1px solid var(--line)}
|
||||
.ev .t{font-weight:600;font-size:10px;letter-spacing:.3px;text-transform:uppercase}
|
||||
.ev.out{background:#f5f8ff;border-color:#dbe6ff}.ev.out .t{color:var(--brand)}
|
||||
.ev.ack{background:#f4f6f8}.ev.ack .t{color:#6b7280}
|
||||
.ev.reply{background:#f1faf3;border-color:#cdeed6}.ev.reply .t{color:var(--ok)}
|
||||
.ev pre{margin:3px 0 0;white-space:pre-wrap;word-break:break-all;color:#374151}
|
||||
</style></head>
|
||||
<body>
|
||||
<div class="top">
|
||||
<div class="logo">L</div>
|
||||
<b>HTTP Bot 调试台</b><span class="ver">examples/http-bot</span>
|
||||
<span class="conn"><span class="dot off" id="cdot"></span><span id="conn">连接中…</span></span>
|
||||
</div>
|
||||
<div class="wrap">
|
||||
<!-- chat -->
|
||||
<div class="card chat">
|
||||
<h3>对话 · 真实发往运行中的 http_bot</h3>
|
||||
<div class="msgs" id="msgs"></div>
|
||||
<div class="bar">
|
||||
<input id="msg" placeholder="输入消息,回车发送…" autofocus/>
|
||||
<button id="send">发送</button>
|
||||
</div>
|
||||
</div>
|
||||
<!-- debug -->
|
||||
<div class="card side">
|
||||
<h3>调试信息</h3>
|
||||
<div class="kv"><span class="k">入站地址</span><br><span class="v"><code id="endpoint">/bots/<uuid></code></span></div>
|
||||
<div class="kv"><span class="k">签名</span> <span class="v">HMAC-SHA256 · <code>X-LB-Signature</code></span></div>
|
||||
<div class="sessrow">
|
||||
<span class="k">会话</span>
|
||||
<input id="sid" value="playground-1"/>
|
||||
<button id="reset">新会话</button>
|
||||
</div>
|
||||
<div class="trace" id="trace"></div>
|
||||
</div>
|
||||
</div>
|
||||
<script>
|
||||
const $=s=>document.querySelector(s);
|
||||
const msgs=$('#msgs'),trace=$('#trace'),inp=$('#msg'),btn=$('#send'),
|
||||
conn=$('#conn'),cdot=$('#cdot'),sidIn=$('#sid');
|
||||
function el(c){const d=document.createElement('div');d.className=c;return d}
|
||||
function atBottom(n){n.scrollTop=n.scrollHeight}
|
||||
function bubble(side,text,metaHtml){
|
||||
const r=el('row '+side),b=el('bub');b.textContent=text;r.appendChild(b);
|
||||
if(metaHtml){const m=el('meta');m.innerHTML=metaHtml;r.appendChild(m)}
|
||||
msgs.appendChild(r);atBottom(msgs)}
|
||||
function sys(t){const d=el('sys');d.textContent=t;msgs.appendChild(d);atBottom(msgs)}
|
||||
function logEv(kind,title,obj){
|
||||
const e=el('ev '+kind),t=el('t');t.textContent=title;e.appendChild(t);
|
||||
if(obj!==undefined){const p=document.createElement('pre');
|
||||
p.textContent=typeof obj==='string'?obj:JSON.stringify(obj,null,2);e.appendChild(p)}
|
||||
trace.appendChild(e);atBottom(trace)}
|
||||
|
||||
const es=new EventSource('/events');
|
||||
es.onopen=()=>{conn.textContent='SSE 已连接';cdot.className='dot on'};
|
||||
es.onerror=()=>{conn.textContent='SSE 断开,重连…';cdot.className='dot off'};
|
||||
es.onmessage=e=>{const ev=JSON.parse(e.data);
|
||||
if(ev.kind==='request'){
|
||||
if(ev.endpoint)$('#endpoint').textContent=ev.url||ev.endpoint;
|
||||
logEv('out','出站 · 已签名 POST',{url:ev.url,session_id:ev.session_id,'X-LB-Signature':ev.sig});
|
||||
}else if(ev.kind==='ack'){
|
||||
const id=ev.data&&ev.data.data&&ev.data.data.accepted_message_id;
|
||||
sys(`LangBot 已接收 · HTTP ${ev.status}`);
|
||||
logEv('ack','入站确认 202',{status:ev.status,accepted_message_id:id||'-'});
|
||||
}else if(ev.kind==='reply'){
|
||||
const sig=ev.sig_ok?'<span class=ok>验签通过</span>':'<span class=bad>验签失败</span>';
|
||||
bubble('bot',ev.text,`seq=${ev.sequence} · ${ev.is_final?'<b>FINAL</b>':'中间段'} · ${sig}`);
|
||||
logEv('reply',`回调 · seq ${ev.sequence}${ev.is_final?' · FINAL':''}`,
|
||||
{session_id:ev.session_id,sequence:ev.sequence,is_final:ev.is_final,sig_ok:ev.sig_ok,text:ev.text});
|
||||
}};
|
||||
|
||||
async function send(){
|
||||
const t=inp.value.trim();if(!t)return;inp.value='';btn.disabled=true;
|
||||
bubble('me',t,'已签名 → POST /bots/<uuid>');
|
||||
try{await fetch('/send',{method:'POST',headers:{'Content-Type':'application/json'},
|
||||
body:JSON.stringify({session_id:sidIn.value.trim()||'playground-1',text:t})});}
|
||||
catch(e){sys('发送失败:'+e)}
|
||||
btn.disabled=false;inp.focus();}
|
||||
btn.onclick=send;inp.addEventListener('keydown',e=>{if(e.key==='Enter')send()});
|
||||
$('#reset').onclick=()=>{sidIn.value='playground-'+Math.random().toString(36).slice(2,7);
|
||||
sys('已切换到新会话 '+sidIn.value);};
|
||||
sys('调试台就绪 · 每条消息都会真实发往运行中的 http_bot,右侧可观察签名 / 202 / 回调全过程。');
|
||||
</script>
|
||||
</body></html>"""
|
||||
|
||||
|
||||
async def main():
|
||||
api_key, bot_uuid = db_lookup()
|
||||
callback_url = f'http://{PUBLIC_IP}:{PORT}/callback'
|
||||
print(f'[init] http_bot uuid = {bot_uuid}')
|
||||
print(f'[init] callback_url = {callback_url}')
|
||||
ok = await configure_bot(api_key, bot_uuid, callback_url)
|
||||
if not ok:
|
||||
print('[warn] bot config update failed; check the API key / payload shape')
|
||||
|
||||
app = web.Application()
|
||||
app['bot_uuid'] = bot_uuid
|
||||
app.router.add_get('/', index)
|
||||
app.router.add_post('/send', send)
|
||||
app.router.add_post('/callback', callback)
|
||||
app.router.add_get('/events', events)
|
||||
|
||||
runner = web.AppRunner(app)
|
||||
await runner.setup()
|
||||
site = web.TCPSite(runner, '0.0.0.0', PORT)
|
||||
await site.start()
|
||||
print(f'\n ▶ 打开: http://{PUBLIC_IP}:{PORT}/\n')
|
||||
while True:
|
||||
await asyncio.sleep(3600)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
asyncio.run(main())
|
||||
@@ -0,0 +1,509 @@
|
||||
"""HTTP Bot adapter — standalone server-to-server platform adapter.
|
||||
|
||||
Lets any external backend drive a LangBot pipeline over plain HTTP:
|
||||
|
||||
* **Inbound** — the backend POSTs a signed message to the unified webhook
|
||||
route ``POST /bots/<bot_uuid>``; this adapter verifies the signature, builds
|
||||
a platform event carrying the caller-defined ``session_id`` as the launcher
|
||||
id, and fires it into the normal pipeline (so message aggregation, N->1,
|
||||
works for free).
|
||||
* **Outbound** — every ``reply_message`` / ``reply_message_chunk`` the pipeline
|
||||
emits is delivered as a signed POST to the configured ``callback_url``. A
|
||||
single turn may emit many replies (1->M); each is one callback, ordered per
|
||||
session via a small worker queue.
|
||||
|
||||
Design notes:
|
||||
|
||||
* The callback URL is taken **only** from adapter config (never from the
|
||||
inbound message) to keep the SSRF surface closed.
|
||||
* Replies for one ``session_id`` are delivered in ``sequence`` order; the
|
||||
caller knows a turn is complete when ``is_final: true`` arrives.
|
||||
* No new HTTP route is registered — the existing unified webhook dispatcher
|
||||
(``pkg/api/http/controller/groups/webhooks.py``) calls
|
||||
``handle_unified_webhook`` on this adapter.
|
||||
|
||||
See docs/platforms/http-bot.md for the full integration guide.
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import asyncio
|
||||
import json
|
||||
import time
|
||||
import typing
|
||||
import uuid
|
||||
from datetime import datetime
|
||||
|
||||
import aiohttp
|
||||
import pydantic
|
||||
import quart
|
||||
|
||||
import langbot_plugin.api.definition.abstract.platform.adapter as abstract_platform_adapter
|
||||
import langbot_plugin.api.entities.builtin.platform.message as platform_message
|
||||
import langbot_plugin.api.entities.builtin.platform.events as platform_events
|
||||
import langbot_plugin.api.entities.builtin.platform.entities as platform_entities
|
||||
import langbot_plugin.api.definition.abstract.platform.event_logger as abstract_platform_logger
|
||||
|
||||
from . import http_bot_signing as signing
|
||||
from ...utils import httpclient
|
||||
|
||||
|
||||
# Error envelope codes (HTTP status -> body code), documented in the design doc.
|
||||
_ERR = {
|
||||
'bad_request': (400, 40001),
|
||||
'bad_signature': (401, 40101),
|
||||
'duplicate': (409, 40901),
|
||||
'too_large': (413, 41301),
|
||||
'internal': (500, 50001),
|
||||
}
|
||||
|
||||
# Max accepted inbound body size (bytes).
|
||||
_MAX_BODY = 1 * 1024 * 1024
|
||||
|
||||
# Idempotency dedup window (seconds) and cap.
|
||||
_IDEMPOTENCY_TTL = 600
|
||||
_IDEMPOTENCY_MAX = 4096
|
||||
|
||||
|
||||
class _SessionOutbound:
|
||||
"""Per-session outbound state: ordered delivery queue + sequence counter."""
|
||||
|
||||
def __init__(self) -> None:
|
||||
self.queue: asyncio.Queue = asyncio.Queue(maxsize=1000)
|
||||
self.worker: asyncio.Task | None = None
|
||||
self.sequence: int = 0
|
||||
self.last_was_final: bool = True # so the first reply of a turn starts at seq 1
|
||||
|
||||
|
||||
class _SyncCollector:
|
||||
"""Collects reply parts for a /sync request and resolves when the turn ends."""
|
||||
|
||||
def __init__(self) -> None:
|
||||
self.parts: list = []
|
||||
self.done: asyncio.Event = asyncio.Event()
|
||||
|
||||
|
||||
class HttpBotAdapter(abstract_platform_adapter.AbstractMessagePlatformAdapter):
|
||||
"""Standalone HTTP adapter (inbound webhook + outbound callbacks)."""
|
||||
|
||||
bot_uuid: str = pydantic.Field(default='', exclude=True)
|
||||
|
||||
listeners: dict[
|
||||
typing.Type[platform_events.Event],
|
||||
typing.Callable[[platform_events.Event, abstract_platform_adapter.AbstractMessagePlatformAdapter], None],
|
||||
] = pydantic.Field(default_factory=dict, exclude=True)
|
||||
|
||||
# session_id -> outbound state
|
||||
outbound_states: dict[str, _SessionOutbound] = pydantic.Field(default_factory=dict, exclude=True)
|
||||
# idempotency key -> accepted-at epoch
|
||||
idempotency_cache: dict[str, float] = pydantic.Field(default_factory=dict, exclude=True)
|
||||
# session_id -> sync collector (set while a /sync request is awaiting a turn)
|
||||
sync_waiters: dict[str, '_SyncCollector'] = pydantic.Field(default_factory=dict, exclude=True)
|
||||
|
||||
model_config = pydantic.ConfigDict(arbitrary_types_allowed=True)
|
||||
|
||||
def __init__(self, config: dict, logger: abstract_platform_logger.AbstractEventLogger, **kwargs):
|
||||
super().__init__(config=config, logger=logger, **kwargs)
|
||||
self.bot_account_id = 'http_bot'
|
||||
self.outbound_states = {}
|
||||
self.idempotency_cache = {}
|
||||
self.sync_waiters = {}
|
||||
|
||||
# -- framework hooks ------------------------------------------------------
|
||||
|
||||
def set_bot_uuid(self, bot_uuid: str) -> None:
|
||||
"""Called by the bot manager so the adapter knows its own bot uuid."""
|
||||
object.__setattr__(self, 'bot_uuid', bot_uuid)
|
||||
|
||||
def get_launcher_id(self, event: platform_events.MessageEvent) -> str:
|
||||
"""Map an inbound event to a LangBot launcher id.
|
||||
|
||||
We return the caller-defined ``session_id`` (stashed on the sender /
|
||||
group id at inbound time) so that each external session maps 1:1 to an
|
||||
isolated LangBot session.
|
||||
"""
|
||||
if isinstance(event, platform_events.GroupMessage):
|
||||
return str(event.sender.group.id)
|
||||
return str(event.sender.id)
|
||||
|
||||
def register_listener(
|
||||
self,
|
||||
event_type: typing.Type[platform_events.Event],
|
||||
func: typing.Callable[
|
||||
[platform_events.Event, abstract_platform_adapter.AbstractMessagePlatformAdapter], typing.Awaitable[None]
|
||||
],
|
||||
):
|
||||
self.listeners[event_type] = func
|
||||
|
||||
def unregister_listener(
|
||||
self,
|
||||
event_type: typing.Type[platform_events.Event],
|
||||
func: typing.Callable[
|
||||
[platform_events.Event, abstract_platform_adapter.AbstractMessagePlatformAdapter], typing.Awaitable[None]
|
||||
],
|
||||
):
|
||||
self.listeners.pop(event_type, None)
|
||||
|
||||
async def is_muted(self, group_id: int) -> bool:
|
||||
return False
|
||||
|
||||
async def is_stream_output_supported(self) -> bool:
|
||||
return True
|
||||
|
||||
async def run_async(self):
|
||||
# Purely webhook-driven; nothing to poll. Stay alive.
|
||||
while True:
|
||||
await asyncio.sleep(3600)
|
||||
|
||||
async def kill(self):
|
||||
# Cancel any outbound workers.
|
||||
for state in self.outbound_states.values():
|
||||
if state.worker and not state.worker.done():
|
||||
state.worker.cancel()
|
||||
return True
|
||||
|
||||
# -- inbound --------------------------------------------------------------
|
||||
|
||||
def _err(self, kind: str, detail: str = ''):
|
||||
status, code = _ERR[kind]
|
||||
return quart.jsonify({'code': code, 'msg': detail or kind, 'data': None}), status
|
||||
|
||||
def _prune_idempotency(self) -> None:
|
||||
now = time.time()
|
||||
if len(self.idempotency_cache) > _IDEMPOTENCY_MAX:
|
||||
self.idempotency_cache.clear()
|
||||
return
|
||||
expired = [k for k, ts in self.idempotency_cache.items() if now - ts > _IDEMPOTENCY_TTL]
|
||||
for k in expired:
|
||||
self.idempotency_cache.pop(k, None)
|
||||
|
||||
async def handle_unified_webhook(self, bot_uuid: str, path: str, request):
|
||||
"""Handle an inbound POST from the unified webhook dispatcher.
|
||||
|
||||
Sub-path routing:
|
||||
(no path) -> push a message
|
||||
"reset" -> reset a session's conversation (body: {session_id, session_type?})
|
||||
"sync" -> push a message and wait for the final reply (collapses 1->M)
|
||||
"""
|
||||
object.__setattr__(self, 'bot_uuid', bot_uuid)
|
||||
|
||||
if path == 'reset':
|
||||
return await self._handle_reset(request)
|
||||
if path == 'sync':
|
||||
return await self._handle_inbound(request, sync=True)
|
||||
if path in ('', None):
|
||||
return await self._handle_inbound(request, sync=False)
|
||||
return self._err('bad_request', f'unknown sub-path: {path}')
|
||||
|
||||
async def _read_and_verify(self, request) -> tuple[dict | None, typing.Any]:
|
||||
"""Read body, enforce size + signature. Returns (data, error_response)."""
|
||||
body = await request.get_data()
|
||||
if body and len(body) > _MAX_BODY:
|
||||
return None, self._err('too_large', 'message too large')
|
||||
|
||||
if self.config.get('signature_required', True):
|
||||
ok, reason = signing.verify(
|
||||
secret=self.config.get('inbound_secret', ''),
|
||||
body=body,
|
||||
timestamp=request.headers.get(signing.HEADER_TIMESTAMP),
|
||||
signature=request.headers.get(signing.HEADER_SIGNATURE),
|
||||
)
|
||||
if not ok:
|
||||
await self.logger.warning(f'http_bot inbound signature rejected: {reason}')
|
||||
return None, self._err('bad_signature', f'invalid signature: {reason}')
|
||||
|
||||
try:
|
||||
data = json.loads(body)
|
||||
except (json.JSONDecodeError, ValueError):
|
||||
return None, self._err('bad_request', 'body is not valid JSON')
|
||||
if not isinstance(data, dict):
|
||||
return None, self._err('bad_request', 'body must be a JSON object')
|
||||
return data, None
|
||||
|
||||
def _build_event(self, data: dict) -> tuple[platform_events.MessageEvent, str, str, str]:
|
||||
"""Build a platform event from inbound data.
|
||||
|
||||
Returns (event, session_id, session_type, message_id).
|
||||
"""
|
||||
session_id = str(data['session_id'])
|
||||
session_type = data.get('session_type') or self.config.get('default_session_type', 'person')
|
||||
sender_meta = data.get('sender') or {}
|
||||
sender_name = str(sender_meta.get('name', 'User'))
|
||||
|
||||
message_id = 'in_' + uuid.uuid4().hex
|
||||
chain = platform_message.MessageChain.model_validate(data['message'])
|
||||
# Carry the inbound message id + timestamp as the Source component.
|
||||
chain.insert(0, platform_message.Source(id=message_id, time=datetime.now()))
|
||||
|
||||
if session_type == 'group':
|
||||
group = platform_entities.Group(
|
||||
id=session_id,
|
||||
name=str(sender_meta.get('group_name', session_id)),
|
||||
permission=platform_entities.Permission.Member,
|
||||
)
|
||||
sender = platform_entities.GroupMember(
|
||||
id=str(sender_meta.get('id', session_id)),
|
||||
member_name=sender_name,
|
||||
group=group,
|
||||
permission=platform_entities.Permission.Member,
|
||||
)
|
||||
event = platform_events.GroupMessage(sender=sender, message_chain=chain, time=datetime.now().timestamp())
|
||||
else:
|
||||
sender = platform_entities.Friend(id=session_id, nickname=sender_name, remark=sender_name)
|
||||
event = platform_events.FriendMessage(sender=sender, message_chain=chain, time=datetime.now().timestamp())
|
||||
return event, session_id, session_type, message_id
|
||||
|
||||
async def _handle_inbound(self, request, sync: bool):
|
||||
data, err = await self._read_and_verify(request)
|
||||
if err is not None:
|
||||
return err
|
||||
|
||||
if 'session_id' not in data or 'message' not in data:
|
||||
return self._err('bad_request', 'session_id and message are required')
|
||||
|
||||
# Idempotency.
|
||||
idem = request.headers.get(signing.HEADER_IDEMPOTENCY)
|
||||
if idem:
|
||||
self._prune_idempotency()
|
||||
if idem in self.idempotency_cache:
|
||||
return self._err('duplicate', 'idempotency key already accepted')
|
||||
self.idempotency_cache[idem] = time.time()
|
||||
|
||||
try:
|
||||
event, session_id, session_type, message_id = self._build_event(data)
|
||||
except Exception as e: # noqa: BLE001
|
||||
return self._err('bad_request', f'failed to parse message: {e}')
|
||||
|
||||
listener = self.listeners.get(type(event))
|
||||
if listener is None:
|
||||
return self._err('internal', 'no listener registered for event type')
|
||||
|
||||
if sync:
|
||||
return await self._run_sync(event, listener, session_id, message_id)
|
||||
|
||||
# Fire-and-collect: kick the pipeline, return 202 immediately.
|
||||
asyncio.create_task(listener(event, self))
|
||||
return quart.jsonify(
|
||||
{
|
||||
'code': 0,
|
||||
'msg': 'accepted',
|
||||
'data': {
|
||||
'session_id': session_id,
|
||||
'accepted_message_id': message_id,
|
||||
'aggregating': True,
|
||||
},
|
||||
}
|
||||
), 202
|
||||
|
||||
async def _handle_reset(self, request):
|
||||
data, err = await self._read_and_verify(request)
|
||||
if err is not None:
|
||||
return err
|
||||
if 'session_id' not in data:
|
||||
return self._err('bad_request', 'session_id is required')
|
||||
|
||||
session_id = str(data['session_id'])
|
||||
session_type = data.get('session_type') or self.config.get('default_session_type', 'person')
|
||||
launcher_type = 'group' if session_type == 'group' else 'person'
|
||||
|
||||
removed = await self._reset_session(launcher_type, session_id)
|
||||
return quart.jsonify({'code': 0, 'msg': 'reset', 'data': {'session_id': session_id, 'removed': removed}}), 200
|
||||
|
||||
async def _reset_session(self, launcher_type: str, launcher_id: str) -> bool:
|
||||
"""Drop the matching session so the next message starts a fresh conversation."""
|
||||
sess_mgr = self.ap.sess_mgr
|
||||
before = len(sess_mgr.session_list)
|
||||
sess_mgr.session_list = [
|
||||
s
|
||||
for s in sess_mgr.session_list
|
||||
if not (
|
||||
str(s.launcher_type.value if hasattr(s.launcher_type, 'value') else s.launcher_type) == launcher_type
|
||||
and str(s.launcher_id) == launcher_id
|
||||
)
|
||||
]
|
||||
return len(sess_mgr.session_list) < before
|
||||
|
||||
# -- outbound -------------------------------------------------------------
|
||||
|
||||
@staticmethod
|
||||
def _extract_session_id(message_source: platform_events.MessageEvent) -> str:
|
||||
if isinstance(message_source, platform_events.GroupMessage):
|
||||
return str(message_source.sender.group.id)
|
||||
return str(message_source.sender.id)
|
||||
|
||||
@staticmethod
|
||||
def _extract_reply_to(message_source: platform_events.MessageEvent) -> str:
|
||||
for comp in message_source.message_chain:
|
||||
if isinstance(comp, platform_message.Source):
|
||||
return str(comp.id)
|
||||
return ''
|
||||
|
||||
def _next_sequence(self, session_id: str, is_final: bool) -> int:
|
||||
state = self.outbound_states.setdefault(session_id, _SessionOutbound())
|
||||
if state.last_was_final:
|
||||
state.sequence = 1
|
||||
else:
|
||||
state.sequence += 1
|
||||
state.last_was_final = is_final
|
||||
return state.sequence
|
||||
|
||||
async def _enqueue_callback(self, session_id: str, payload: dict) -> None:
|
||||
state = self.outbound_states.setdefault(session_id, _SessionOutbound())
|
||||
if state.worker is None or state.worker.done():
|
||||
state.worker = asyncio.create_task(self._outbound_worker(session_id, state))
|
||||
try:
|
||||
state.queue.put_nowait(payload)
|
||||
except asyncio.QueueFull:
|
||||
# Drop oldest to bound memory, then enqueue (best-effort, at-least-once).
|
||||
try:
|
||||
state.queue.get_nowait()
|
||||
except asyncio.QueueEmpty:
|
||||
pass
|
||||
await self.logger.warning(f'http_bot outbound queue full for session {session_id}; dropped oldest')
|
||||
state.queue.put_nowait(payload)
|
||||
|
||||
async def _outbound_worker(self, session_id: str, state: _SessionOutbound) -> None:
|
||||
while True:
|
||||
payload = await state.queue.get()
|
||||
try:
|
||||
await self._deliver_callback(payload)
|
||||
except Exception as e: # noqa: BLE001
|
||||
await self.logger.error(f'http_bot callback delivery failed for {session_id}: {e}')
|
||||
finally:
|
||||
state.queue.task_done()
|
||||
|
||||
async def _deliver_callback(self, payload: dict) -> None:
|
||||
callback_url = self.config.get('callback_url', '')
|
||||
if not callback_url:
|
||||
await self.logger.warning('http_bot has no callback_url configured; dropping reply')
|
||||
return
|
||||
|
||||
body = json.dumps(payload, ensure_ascii=False).encode()
|
||||
secret = self.config.get('outbound_secret') or self.config.get('inbound_secret', '')
|
||||
ts, sig = signing.sign(secret, body)
|
||||
headers = {
|
||||
'Content-Type': 'application/json',
|
||||
signing.HEADER_TIMESTAMP: ts,
|
||||
signing.HEADER_SIGNATURE: sig,
|
||||
}
|
||||
timeout = aiohttp.ClientTimeout(total=int(self.config.get('callback_timeout', 15)))
|
||||
max_retries = int(self.config.get('callback_max_retries', 3))
|
||||
|
||||
session = httpclient.get_session()
|
||||
attempt = 0
|
||||
while True:
|
||||
attempt += 1
|
||||
try:
|
||||
async with session.post(callback_url, data=body, headers=headers, timeout=timeout) as resp:
|
||||
if resp.status < 400:
|
||||
return
|
||||
if resp.status < 500 or attempt > max_retries:
|
||||
await self.logger.warning(f'http_bot callback {callback_url} -> {resp.status}, giving up')
|
||||
return
|
||||
except (aiohttp.ClientError, asyncio.TimeoutError) as e:
|
||||
if attempt > max_retries:
|
||||
await self.logger.warning(f'http_bot callback {callback_url} failed after {attempt} tries: {e}')
|
||||
return
|
||||
await asyncio.sleep(min(2 ** (attempt - 1), 30))
|
||||
|
||||
async def _emit_reply(
|
||||
self,
|
||||
message_source: platform_events.MessageEvent,
|
||||
message: platform_message.MessageChain,
|
||||
is_final: bool,
|
||||
stream: bool,
|
||||
) -> dict:
|
||||
session_id = self._extract_session_id(message_source)
|
||||
reply_to = self._extract_reply_to(message_source)
|
||||
sequence = self._next_sequence(session_id, is_final)
|
||||
parts = [c.model_dump() if hasattr(c, 'model_dump') else c.__dict__ for c in message]
|
||||
payload = {
|
||||
'session_id': session_id,
|
||||
'reply_to': reply_to,
|
||||
'sequence': sequence,
|
||||
'is_final': is_final,
|
||||
'stream': stream,
|
||||
'message': parts,
|
||||
'timestamp': datetime.now().isoformat(),
|
||||
}
|
||||
|
||||
# If a /sync request is awaiting this session, collect instead of POSTing.
|
||||
collector = self.sync_waiters.get(session_id)
|
||||
if collector is not None:
|
||||
collector.parts.extend(parts)
|
||||
if is_final:
|
||||
collector.done.set()
|
||||
return payload
|
||||
|
||||
await self._enqueue_callback(session_id, payload)
|
||||
return payload
|
||||
|
||||
async def send_message(self, target_type: str, target_id: str, message: platform_message.MessageChain) -> dict:
|
||||
"""Proactively push a message to a session (target_id == session_id)."""
|
||||
sequence = self._next_sequence(str(target_id), is_final=True)
|
||||
payload = {
|
||||
'session_id': str(target_id),
|
||||
'reply_to': '',
|
||||
'sequence': sequence,
|
||||
'is_final': True,
|
||||
'stream': False,
|
||||
'message': [c.model_dump() if hasattr(c, 'model_dump') else c.__dict__ for c in message],
|
||||
'timestamp': datetime.now().isoformat(),
|
||||
}
|
||||
await self._enqueue_callback(str(target_id), payload)
|
||||
return payload
|
||||
|
||||
async def reply_message(
|
||||
self,
|
||||
message_source: platform_events.MessageEvent,
|
||||
message: platform_message.MessageChain,
|
||||
quote_origin: bool = False,
|
||||
) -> dict:
|
||||
return await self._emit_reply(message_source, message, is_final=True, stream=False)
|
||||
|
||||
async def reply_message_chunk(
|
||||
self,
|
||||
message_source: platform_events.MessageEvent,
|
||||
bot_message,
|
||||
message: platform_message.MessageChain,
|
||||
quote_origin: bool = False,
|
||||
is_final: bool = False,
|
||||
) -> dict:
|
||||
message_is_final = is_final and getattr(bot_message, 'tool_calls', None) is None
|
||||
return await self._emit_reply(message_source, message, is_final=message_is_final, stream=True)
|
||||
|
||||
# -- sync convenience mode ------------------------------------------------
|
||||
|
||||
async def _run_sync(self, event, listener, session_id: str, message_id: str):
|
||||
"""Push a message and wait for the final reply, collapsing 1->M parts.
|
||||
|
||||
Lossy by design (drops streaming/ordering nuance); documented as such.
|
||||
Concurrency-safe: routing is via the per-session ``_sync_waiters``
|
||||
registry that ``_emit_reply`` consults, not by patching methods.
|
||||
"""
|
||||
if session_id in self.sync_waiters:
|
||||
return self._err('duplicate', 'a sync request is already in flight for this session')
|
||||
|
||||
collector = _SyncCollector()
|
||||
self.sync_waiters[session_id] = collector
|
||||
try:
|
||||
asyncio.create_task(listener(event, self))
|
||||
timeout = int(self.config.get('callback_timeout', 15)) * 4
|
||||
try:
|
||||
await asyncio.wait_for(collector.done.wait(), timeout=timeout)
|
||||
except asyncio.TimeoutError:
|
||||
await self.logger.warning(f'http_bot sync wait timed out for session {session_id}')
|
||||
finally:
|
||||
self.sync_waiters.pop(session_id, None)
|
||||
|
||||
return quart.jsonify(
|
||||
{
|
||||
'code': 0,
|
||||
'msg': 'ok',
|
||||
'data': {
|
||||
'session_id': session_id,
|
||||
'reply_to': message_id,
|
||||
'message': collector.parts,
|
||||
},
|
||||
}
|
||||
), 200
|
||||
@@ -0,0 +1,9 @@
|
||||
<svg width="800px" height="800px" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg">
|
||||
<rect x="2" y="2" width="60" height="60" rx="14" fill="#2563EB"/>
|
||||
<g stroke="#FFFFFF" stroke-width="3.6" stroke-linecap="round" stroke-linejoin="round" fill="none">
|
||||
<!-- </> code icon -->
|
||||
<path d="M24 22 L14 32 L24 42"/>
|
||||
<path d="M40 22 L50 32 L40 42"/>
|
||||
<path d="M36 18 L28 46"/>
|
||||
</g>
|
||||
</svg>
|
||||
|
After Width: | Height: | Size: 416 B |
@@ -0,0 +1,153 @@
|
||||
apiVersion: v1
|
||||
kind: MessagePlatformAdapter
|
||||
metadata:
|
||||
name: http_bot
|
||||
label:
|
||||
en_US: HTTP Bot
|
||||
zh_Hans: HTTP 通用接入
|
||||
zh_Hant: HTTP 通用接入
|
||||
ja_JP: HTTP ボット
|
||||
description:
|
||||
en_US: Integrate any backend over plain HTTP. Push messages in via a signed webhook, receive replies on a callback URL. Server-to-server, no long-lived connection. Preserves message aggregation (N->1) and multi-part replies (1->M).
|
||||
zh_Hans: 通过 HTTP 接入任意后端系统。以签名 Webhook 推入消息，在回调地址接收回复。面向服务间集成，无需长连接。完整保留消息聚合（多条合一）与多段回复（一条问、多条回）能力。
|
||||
zh_Hant: 透過 HTTP 接入任意後端系統。以簽名 Webhook 推入訊息，在回調地址接收回覆。面向服務間整合，無需長連線。完整保留訊息聚合（多條合一）與多段回覆（一條問、多條回）能力。
|
||||
ja_JP: 任意のバックエンドを HTTP で接続。署名付き Webhook でメッセージを送信し、コールバック URL で返信を受信します。サーバー間連携、長時間接続不要。メッセージ集約（N→1）とマルチパート返信（1→M）に対応。
|
||||
icon: http_bot.svg
|
||||
spec:
|
||||
categories:
|
||||
- popular
|
||||
- global
|
||||
help_links:
|
||||
zh: https://docs.langbot.app/zh/platforms/http-bot
|
||||
en: https://docs.langbot.app/en/platforms/http-bot
|
||||
ja: https://docs.langbot.app/ja/platforms/http-bot
|
||||
config:
|
||||
- name: webhook_url
|
||||
label:
|
||||
en_US: Inbound Webhook URL
|
||||
zh_Hans: 入站 Webhook 地址
|
||||
zh_Hant: 入站 Webhook 地址
|
||||
ja_JP: 受信 Webhook URL
|
||||
description:
|
||||
en_US: Copy this URL. Your backend POSTs messages here (signed with the inbound secret).
|
||||
zh_Hans: 复制此地址。你的后端将消息以签名方式 POST 到这里。
|
||||
zh_Hant: 複製此地址。你的後端將訊息以簽名方式 POST 到這裡。
|
||||
ja_JP: この URL をコピーしてください。バックエンドは署名付きでここにメッセージを POST します。
|
||||
type: webhook-url
|
||||
required: false
|
||||
default: ""
|
||||
- name: inbound_secret
|
||||
label:
|
||||
en_US: Inbound Signing Secret
|
||||
zh_Hans: 入站签名密钥
|
||||
zh_Hant: 入站簽名密鑰
|
||||
ja_JP: 受信署名シークレット
|
||||
description:
|
||||
en_US: HMAC-SHA256 secret your backend uses to sign inbound requests. LangBot verifies every inbound POST with it.
|
||||
zh_Hans: 你的后端用于对入站请求做 HMAC-SHA256 签名的密钥；LangBot 据此校验每个入站 POST。
|
||||
zh_Hant: 你的後端用於對入站請求做 HMAC-SHA256 簽名的密鑰；LangBot 據此校驗每個入站 POST。
|
||||
ja_JP: バックエンドが受信リクエストの署名に使う HMAC-SHA256 シークレット。LangBot は受信 POST ごとに検証します。
|
||||
type: string
|
||||
required: true
|
||||
default: ""
|
||||
- name: callback_url
|
||||
label:
|
||||
en_US: Outbound Callback URL
|
||||
zh_Hans: 出站回调地址
|
||||
zh_Hant: 出站回調地址
|
||||
ja_JP: 送信コールバック URL
|
||||
description:
|
||||
en_US: Where LangBot POSTs replies. One turn may trigger multiple callbacks (1->M). For security the callback URL is taken ONLY from this config and cannot be overridden per-message.
|
||||
zh_Hans: LangBot 将回复 POST 到此地址。一轮对话可能触发多次回调（一问多答）。出于安全考虑，回调地址只取自此配置，不允许逐条消息覆盖。
|
||||
zh_Hant: LangBot 將回覆 POST 到此地址。一輪對話可能觸發多次回調（一問多答）。出於安全考慮，回調地址只取自此配置，不允許逐條訊息覆蓋。
|
||||
ja_JP: LangBot が返信を POST する先。1 ターンで複数回のコールバック（1→M）が発生し得ます。セキュリティ上、コールバック URL はこの設定からのみ取得し、メッセージ単位で上書きできません。
|
||||
type: string
|
||||
required: true
|
||||
default: ""
|
||||
- name: outbound_secret
|
||||
label:
|
||||
en_US: Outbound Signing Secret
|
||||
zh_Hans: 出站签名密钥
|
||||
zh_Hant: 出站簽名密鑰
|
||||
ja_JP: 送信署名シークレット
|
||||
description:
|
||||
en_US: HMAC-SHA256 secret LangBot uses to sign outbound callbacks so your receiver can verify them. Falls back to the inbound secret when empty.
|
||||
zh_Hans: LangBot 用于对出站回调签名的密钥，供你的接收端校验。留空时回退使用入站密钥。
|
||||
zh_Hant: LangBot 用於對出站回調簽名的密鑰，供你的接收端校驗。留空時回退使用入站密鑰。
|
||||
ja_JP: LangBot が送信コールバックの署名に使う HMAC-SHA256 シークレット。受信側で検証できます。空の場合は受信シークレットを使用します。
|
||||
type: string
|
||||
required: false
|
||||
default: ""
|
||||
- name: default_session_type
|
||||
label:
|
||||
en_US: Default Session Type
|
||||
zh_Hans: 默认会话类型
|
||||
zh_Hant: 預設會話類型
|
||||
ja_JP: デフォルトセッションタイプ
|
||||
description:
|
||||
en_US: Session type used when an inbound message omits session_type.
|
||||
zh_Hans: 入站消息未携带 session_type 时使用的会话类型。
|
||||
zh_Hant: 入站訊息未攜帶 session_type 時使用的會話類型。
|
||||
ja_JP: 受信メッセージに session_type がない場合に使用するセッションタイプ。
|
||||
type: select
|
||||
options:
|
||||
- name: person
|
||||
label:
|
||||
en_US: Person (1-on-1)
|
||||
zh_Hans: 个人（一对一）
|
||||
zh_Hant: 個人（一對一）
|
||||
ja_JP: 個人（1 対 1）
|
||||
- name: group
|
||||
label:
|
||||
en_US: Group
|
||||
zh_Hans: 群组
|
||||
zh_Hant: 群組
|
||||
ja_JP: グループ
|
||||
required: false
|
||||
default: person
|
||||
- name: signature_required
|
||||
label:
|
||||
en_US: Require Inbound Signature
|
||||
zh_Hans: 强制入站签名校验
|
||||
zh_Hant: 強制入站簽名校驗
|
||||
ja_JP: 受信署名を必須にする
|
||||
description:
|
||||
en_US: When enabled (recommended), every inbound POST must carry a valid signature. Disable ONLY for local development behind a trusted network.
|
||||
zh_Hans: 开启（推荐）后，每个入站 POST 都必须带有效签名。仅在受信任内网的本地开发时关闭。
|
||||
zh_Hant: 開啟（推薦）後，每個入站 POST 都必須帶有效簽名。僅在受信任內網的本地開發時關閉。
|
||||
ja_JP: 有効（推奨）にすると、すべての受信 POST に有効な署名が必要です。信頼できるネットワーク内のローカル開発時のみ無効化してください。
|
||||
type: boolean
|
||||
required: false
|
||||
default: true
|
||||
- name: callback_timeout
|
||||
label:
|
||||
en_US: Callback Timeout (seconds)
|
||||
zh_Hans: 回调超时（秒）
|
||||
zh_Hant: 回調逾時（秒）
|
||||
ja_JP: コールバックタイムアウト（秒）
|
||||
description:
|
||||
en_US: Per-callback HTTP timeout.
|
||||
zh_Hans: 单次回调的 HTTP 超时时间。
|
||||
zh_Hant: 單次回調的 HTTP 逾時時間。
|
||||
ja_JP: コールバックごとの HTTP タイムアウト。
|
||||
type: integer
|
||||
required: false
|
||||
default: 15
|
||||
- name: callback_max_retries
|
||||
label:
|
||||
en_US: Callback Max Retries
|
||||
zh_Hans: 回调最大重试次数
|
||||
zh_Hant: 回調最大重試次數
|
||||
ja_JP: コールバック最大リトライ回数
|
||||
description:
|
||||
en_US: Retries on timeout or 5xx, with exponential backoff.
|
||||
zh_Hans: 超时或 5xx 时按指数退避重试的次数。
|
||||
zh_Hant: 逾時或 5xx 時按指數退避重試的次數。
|
||||
ja_JP: タイムアウトまたは 5xx 時に指数バックオフでリトライする回数。
|
||||
type: integer
|
||||
required: false
|
||||
default: 3
|
||||
execution:
|
||||
python:
|
||||
path: ./http_bot.py
|
||||
attr: HttpBotAdapter
|
||||
@@ -0,0 +1,95 @@
|
||||
"""HMAC signing utilities for the HTTP Bot adapter.
|
||||
|
||||
A dependency-free, symmetric HMAC-SHA256 scheme used in *both* directions:
|
||||
|
||||
signing_string = "{timestamp}." + raw_body_bytes
|
||||
signature = "sha256=" + hex(HMAC_SHA256(secret, signing_string))
|
||||
|
||||
Inbound requests are signed by the caller and verified here; outbound
|
||||
callbacks are signed here and verified by the caller. The scheme is trivial to
|
||||
reproduce in any language (see docs/platforms/http-bot.md for JS/curl).
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import hashlib
|
||||
import hmac
|
||||
import time
|
||||
|
||||
# Header names (kept here so adapter + clients agree on a single source).
|
||||
HEADER_TIMESTAMP = 'X-LB-Timestamp'
|
||||
HEADER_SIGNATURE = 'X-LB-Signature'
|
||||
HEADER_IDEMPOTENCY = 'X-LB-Idempotency-Key'
|
||||
|
||||
# Maximum allowed clock skew between signer and verifier (seconds).
|
||||
DEFAULT_REPLAY_WINDOW = 300
|
||||
|
||||
|
||||
def compute_signature(secret: str, body: bytes, timestamp: str | int) -> str:
|
||||
"""Compute the ``sha256=<hex>`` signature for *body* at *timestamp*.
|
||||
|
||||
Args:
|
||||
secret: Shared HMAC secret.
|
||||
body: Raw request body bytes (exactly as sent on the wire).
|
||||
timestamp: Unix timestamp (seconds) as str or int.
|
||||
|
||||
Returns:
|
||||
The signature string, e.g. ``sha256=ab12...``.
|
||||
"""
|
||||
signing_string = f'{timestamp}.'.encode() + body
|
||||
digest = hmac.new(secret.encode(), signing_string, hashlib.sha256).hexdigest()
|
||||
return f'sha256={digest}'
|
||||
|
||||
|
||||
def sign(secret: str, body: bytes, timestamp: int | None = None) -> tuple[str, str]:
|
||||
"""Produce ``(timestamp, signature)`` for an outbound request.
|
||||
|
||||
Args:
|
||||
secret: Shared HMAC secret.
|
||||
body: Raw request body bytes.
|
||||
timestamp: Optional fixed timestamp; defaults to ``int(time.time())``.
|
||||
|
||||
Returns:
|
||||
``(timestamp_str, signature_str)``.
|
||||
"""
|
||||
ts = str(timestamp if timestamp is not None else int(time.time()))
|
||||
return ts, compute_signature(secret, body, ts)
|
||||
|
||||
|
||||
def verify(
|
||||
secret: str,
|
||||
body: bytes,
|
||||
timestamp: str | None,
|
||||
signature: str | None,
|
||||
replay_window: int = DEFAULT_REPLAY_WINDOW,
|
||||
) -> tuple[bool, str]:
|
||||
"""Verify an inbound signature.
|
||||
|
||||
Args:
|
||||
secret: Shared HMAC secret.
|
||||
body: Raw request body bytes.
|
||||
timestamp: Value of the timestamp header.
|
||||
signature: Value of the signature header.
|
||||
replay_window: Max allowed skew in seconds.
|
||||
|
||||
Returns:
|
||||
``(ok, reason)``. ``reason`` is empty when ``ok`` is True, otherwise a
|
||||
short machine-friendly cause (``missing_headers`` / ``bad_timestamp`` /
|
||||
``expired`` / ``signature_mismatch``).
|
||||
"""
|
||||
if not timestamp or not signature:
|
||||
return False, 'missing_headers'
|
||||
|
||||
try:
|
||||
ts_int = int(float(timestamp))
|
||||
except (ValueError, TypeError):
|
||||
return False, 'bad_timestamp'
|
||||
|
||||
if abs(int(time.time()) - ts_int) > replay_window:
|
||||
return False, 'expired'
|
||||
|
||||
expected = compute_signature(secret, body, timestamp)
|
||||
if not hmac.compare_digest(expected, signature):
|
||||
return False, 'signature_mismatch'
|
||||
|
||||
return True, ''
|
||||
Reference in New Issue
Block a user