Strip surrounding quotes from requests tool URLs. (#3563)

Often an LLM will output a requests tool input argument surrounded by
single quotes. This triggers an exception in the requests library. Here,
we add a simple clean url function that strips any leading and trailing
single and double quotes before passing the URL to the underlying
requests library.

Co-authored-by: James Brotchie <brotchie@google.com>

langchain/tools/requests/tool.py

@@ -14,6 +14,11 @@ def _parse_input(text: str) -> Dict[str, Any]:
     return json.loads(text)
 
 
+def _clean_url(url: str) -> str:
+    """Strips quotes from the url."""
+    return url.strip("\"'")
+
+
 class BaseRequestsTool(BaseModel):
     """Base class for requests tools."""
 
@@ -28,11 +33,11 @@ class RequestsGetTool(BaseRequestsTool, BaseTool):
 
     def _run(self, url: str) -> str:
         """Run the tool."""
-        return self.requests_wrapper.get(url)
+        return self.requests_wrapper.get(_clean_url(url))
 
     async def _arun(self, url: str) -> str:
         """Run the tool asynchronously."""
-        return await self.requests_wrapper.aget(url)
+        return await self.requests_wrapper.aget(_clean_url(url))
 
 
 class RequestsPostTool(BaseRequestsTool, BaseTool):
@@ -51,7 +56,7 @@ class RequestsPostTool(BaseRequestsTool, BaseTool):
         """Run the tool."""
         try:
             data = _parse_input(text)
-            return self.requests_wrapper.post(data["url"], data["data"])
+            return self.requests_wrapper.post(_clean_url(data["url"]), data["data"])
         except Exception as e:
             return repr(e)
 
@@ -59,7 +64,9 @@ class RequestsPostTool(BaseRequestsTool, BaseTool):
         """Run the tool asynchronously."""
         try:
             data = _parse_input(text)
-            return await self.requests_wrapper.apost(data["url"], data["data"])
+            return await self.requests_wrapper.apost(
+                _clean_url(data["url"]), data["data"]
+            )
         except Exception as e:
             return repr(e)
 
@@ -80,7 +87,7 @@ class RequestsPatchTool(BaseRequestsTool, BaseTool):
         """Run the tool."""
         try:
             data = _parse_input(text)
-            return self.requests_wrapper.patch(data["url"], data["data"])
+            return self.requests_wrapper.patch(_clean_url(data["url"]), data["data"])
         except Exception as e:
             return repr(e)
 
@@ -88,7 +95,9 @@ class RequestsPatchTool(BaseRequestsTool, BaseTool):
         """Run the tool asynchronously."""
         try:
             data = _parse_input(text)
-            return await self.requests_wrapper.apatch(data["url"], data["data"])
+            return await self.requests_wrapper.apatch(
+                _clean_url(data["url"]), data["data"]
+            )
         except Exception as e:
             return repr(e)
 
@@ -109,7 +118,7 @@ class RequestsPutTool(BaseRequestsTool, BaseTool):
         """Run the tool."""
         try:
             data = _parse_input(text)
-            return self.requests_wrapper.put(data["url"], data["data"])
+            return self.requests_wrapper.put(_clean_url(data["url"]), data["data"])
         except Exception as e:
             return repr(e)
 
@@ -117,7 +126,9 @@ class RequestsPutTool(BaseRequestsTool, BaseTool):
         """Run the tool asynchronously."""
         try:
             data = _parse_input(text)
-            return await self.requests_wrapper.aput(data["url"], data["data"])
+            return await self.requests_wrapper.aput(
+                _clean_url(data["url"]), data["data"]
+            )
         except Exception as e:
             return repr(e)
 
@@ -130,8 +141,8 @@ class RequestsDeleteTool(BaseRequestsTool, BaseTool):
 
     def _run(self, url: str) -> str:
         """Run the tool."""
-        return self.requests_wrapper.delete(url)
+        return self.requests_wrapper.delete(_clean_url(url))
 
     async def _arun(self, url: str) -> str:
         """Run the tool asynchronously."""
-        return await self.requests_wrapper.adelete(url)
+        return await self.requests_wrapper.adelete(_clean_url(url))