add requests tools

packages/components/nodes/tools/RequestsGet/core.ts

@@ -0,0 +1,42 @@
+import { Tool } from 'langchain/tools'
+
+export const desc = `A portal to the internet. Use this when you need to get specific content from a website. 
+Input should be a  url (i.e. https://www.google.com). The output will be the text response of the GET request.`
+
+export interface Headers {
+    [key: string]: string
+}
+
+export interface RequestParameters {
+    headers?: Headers
+    url?: string
+    description?: string
+    maxOutputLength?: number
+}
+
+export class RequestsGetTool extends Tool {
+    name = 'requests_get'
+    url = ''
+    description = desc
+    maxOutputLength = 2000
+    headers = {}
+
+    constructor(args?: RequestParameters) {
+        super()
+        this.url = args?.url ?? this.url
+        this.headers = args?.headers ?? this.headers
+        this.description = args?.description ?? this.description
+        this.maxOutputLength = args?.maxOutputLength ?? this.maxOutputLength
+    }
+
+    /** @ignore */
+    async _call(input: string) {
+        const inputUrl = this.url ?? input
+        if (process.env.DEBUG === 'true') console.info(`Making GET API call to ${inputUrl}`)
+        const res = await fetch(inputUrl, {
+            headers: this.headers
+        })
+        const text = await res.text()
+        return text.slice(0, this.maxOutputLength)
+    }
+}