Method not Allowed on API

[sikaili99]

I am making a post request to the API, and I am getting method not allowed. Here is the code I am using.

What am I doing wrong?

import requests

class LangflowHandler:
    BASE_API_URL = "http:https://localhost:7860//api/v1/run/predict"
    
    def __init__(self, flow_id: str = "34c1d9f8-0d82-4755-b4fa-1cdbe44de00c", tweaks: dict = None):
        self.flow_id = flow_id
        self.tweaks = tweaks if tweaks is not None else {}

    def run_flow(self, message: str) -> dict:
        """
        Run a flow with a given message and optional tweaks.

        :param message: The message to send to the flow
        :return: The JSON response from the flow
        """
        api_url = f"{self.BASE_API_URL}/{self.flow_id}"
        payload = {"inputs": message}
        headers = {"Content-Type": "application/json"}
        if self.tweaks:
            payload["tweaks"] = self.tweaks

        response = requests.post(api_url, data=payload, headers=headers)
        return response.json()

And I am using the run_flow method like this

    async def get_langflow_response(self, message):
            langflow_handler = LangflowHandler()
            response = await sync_to_async(langflow_handler.run_flow)(message)
            return response

[dosubot]

Hello, @sikaili99! I'm here to help you with any questions or issues you have. Whether it's solving bugs, answering questions, or becoming a contributor, I'm here to assist you while waiting for a human maintainer.

The "Method Not Allowed" error occurs because the API endpoint you are trying to access does not support the POST method. Here are a few steps to resolve this issue:

1. Verify the Endpoint and Method: Ensure that the endpoint /api/v1/run/predict supports the POST method. According to the Langflow API documentation, the correct endpoint for running a flow is /api/v1/run/{flow_id} and it supports the POST method ^[1].

2. Correct the Endpoint URL: Update the BASE_API_URL to use the correct endpoint. Also, ensure that the payload is correctly formatted as JSON.

3. Use JSON for Payload: Use json parameter instead of data in the requests.post method to ensure the payload is sent as JSON.

4. Include Required Headers: Ensure you include any required headers, such as x-api-key for authentication.

Here is the corrected code:

import requests

class LangflowHandler:
    BASE_API_URL = "http:https://localhost:7860/api/v1/run"

    def __init__(self, flow_id: str = "34c1d9f8-0d82-4755-b4fa-1cdbe44de00c", tweaks: dict = None, api_key: str = "your_api_key"):
        self.flow_id = flow_id
        self.tweaks = tweaks if tweaks is not None else {}
        self.api_key = api_key

    def run_flow(self, message: str) -> dict:
        """
        Run a flow with a given message and optional tweaks.

        :param message: The message to send to the flow
        :return: The JSON response from the flow
        """
        api_url = f"{self.BASE_API_URL}/{self.flow_id}"
        payload = {"inputs": {"text": message}}
        headers = {
            "Content-Type": "application/json",
            "x-api-key": self.api_key
        }
        if self.tweaks:
            payload["tweaks"] = self.tweaks

        response = requests.post(api_url, json=payload, headers=headers)
        return response.json()

And the usage:

async def get_langflow_response(self, message):
    langflow_handler = LangflowHandler()
    response = await sync_to_async(langflow_handler.run_flow)(message)
    return response

Make sure to replace "your_api_key" with your actual API key. This should resolve the "Method Not Allowed" error and allow you to successfully make POST requests to the Langflow API.

To continue talking to Dosu, mention @dosu.

[nicoloboschi]

Please remove the double slash in the BASE_API_URL.
Also replace predict with run. The predict path is deprecated.