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fix(pipeline): handle File messages with base64 data in preproc (#2149)

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File messages from platforms like Telegram carry base64 data with an
empty url. The unconditional from_file_url(me.url) call passed an empty
string downstream, causing httpx to fail with "Request URL is missing
an 'http://' or 'https://' protocol" when uploading to Dify.

Mirror the existing Voice handling pattern: check base64 first, fall
back to url. Applied in both the main message chain and the Quote path.

Closes #2079

Co-authored-by: Junyan Qin <rockchinq@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Copilot
2026-04-25 22:43:00 +08:00
committed by GitHub
parent 6637b153f1
commit 69b87a0d8a
1 changed files with 8 additions and 2 deletions
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10
src/langbot/pkg/pipeline/preproc/preproc.py
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@@ -160,7 +160,10 @@ class PreProcessor(stage.PipelineStage):
elif me.url:
content_list.append(provider_message.ContentElement.from_file_url(me.url, 'voice'))
elif isinstance(me, platform_message.File):
content_list.append(provider_message.ContentElement.from_file_url(me.url, me.name))
if me.base64:
content_list.append(provider_message.ContentElement.from_file_base64(me.base64, me.name))
elif me.url:
content_list.append(provider_message.ContentElement.from_file_url(me.url, me.name))
elif isinstance(me, platform_message.Quote) and quote_msg:
for msg in me.origin:
if isinstance(msg, platform_message.Plain):
@@ -172,7 +175,10 @@ class PreProcessor(stage.PipelineStage):
if msg.base64 is not None:
content_list.append(provider_message.ContentElement.from_image_base64(msg.base64))
elif isinstance(msg, platform_message.File):
content_list.append(provider_message.ContentElement.from_file_url(msg.url, msg.name))
if msg.base64:
content_list.append(provider_message.ContentElement.from_file_base64(msg.base64, msg.name))
elif msg.url:
content_list.append(provider_message.ContentElement.from_file_url(msg.url, msg.name))
elif isinstance(msg, platform_message.Voice):
if msg.base64:
content_list.append(