fix: 修复问题

app/api/langchain-tools/http_get.ts

@@ -0,0 +1,70 @@
+import { htmlToText } from "html-to-text";
+import { Tool } from "langchain/tools";
+
+export interface Headers {
+  [key: string]: string;
+}
+
+export interface RequestTool {
+  headers: Headers;
+  maxOutputLength?: number;
+  timeout: number;
+}
+
+export class HttpGetTool extends Tool implements RequestTool {
+  name = "http_get";
+
+  maxOutputLength = Infinity;
+
+  timeout = 10000;
+
+  constructor(
+    public headers: Headers = {},
+    { maxOutputLength }: { maxOutputLength?: number } = {},
+    { timeout }: { timeout?: number } = {},
+  ) {
+    super(...arguments);
+
+    this.maxOutputLength = maxOutputLength ?? this.maxOutputLength;
+    this.timeout = timeout ?? this.timeout;
+  }
+
+  /** @ignore */
+  async _call(input: string) {
+    try {
+      const res = await this.fetchWithTimeout(
+        input,
+        {
+          headers: this.headers,
+        },
+        this.timeout,
+      );
+      let text = await res.text();
+      text = htmlToText(text);
+      text = text.slice(0, this.maxOutputLength);
+      console.log(text);
+      return text;
+    } catch (error) {
+      console.error(error);
+      return (error as Error).toString();
+    }
+  }
+
+  async fetchWithTimeout(
+    resource: RequestInfo | URL,
+    options = {},
+    timeout: number = 30000,
+  ) {
+    const controller = new AbortController();
+    const id = setTimeout(() => controller.abort(), timeout);
+    const response = await fetch(resource, {
+      ...options,
+      signal: controller.signal,
+    });
+    clearTimeout(id);
+    return response;
+  }
+
+  description = `A portal to the internet. Use this when you need to get specific content from a website.
+  Input should be a url string (i.e. "https://www.google.com"). The output will be the text response of the GET request.`;
+}