Create API KEY

[topflyer]

I created new langflow API key and it is errors
Error message is.
''

[dosubot]

Hello @topflyer! I'm here to help you with any bugs, questions, or contributions you have for Langflow. Let's work together to solve this issue.

To resolve the unexpected error in Langflow after creating a new API key, ensure that the API key is valid and correctly set. You can use the check_api_key method to verify the validity of the API key. If the API key is invalid, the method will return False, and you should check the API key for correctness. If the API key is valid, ensure that it is being used correctly in the context where the error occurs. If the error persists, check the logs for more details on the error ^[1].

Additionally, there are known issues related to API key management in Langflow, such as errors when saving the API key or invalid API key messages. Ensure that the API key is correctly set and that the context is properly managed to avoid unexpected errors ^[2].

To continue talking to Dosu, mention @dosu.

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[topflyer]

@dosu

I added api key and content-type but still 404 error.

[dosubot]

A 404 Not Found error in this context likely indicates that the flow with the ID 74fe8ad8-b75f-41ea-b508-f511414616a8 does not exist in the database. This can happen if the flow ID is incorrect or if the flow has not been created in the system ^[1].

Ensure that the flow ID is correct and that the flow exists. If the flow ID is valid and the flow should exist, double-check the UUID format and verify that the flow is accessible with the provided API key.

To continue talking to Dosu, mention @dosu.

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[topflyer]

@dosu
only flow_id needed and langflow_id don't need?

[dosubot]

For the API request you're making, only the flow_id is necessary if you're specifically targeting a flow. The langflow_id is not required unless specified by the API documentation for a different endpoint or use case. Ensure that the flow_id is correct and corresponds to an existing flow in the system. If you continue to encounter issues, double-check the API documentation for any additional required parameters.

To continue talking to Dosu, mention @dosu.

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[topflyer]

@dosu
can you give me sample code for upload file to langflow?

[dosubot]

Here's a sample code snippet for uploading a file to Langflow using Python:

import httpx
from pathlib import Path

class UploadError(Exception):
    """Raised when an error occurs during the upload process."""

def upload(file_path: str, host: str, flow_id: str):
    """Upload a file to Langflow and return the file path.

    Args:
        file_path (str): The path to the file to be uploaded.
        host (str): The host URL of Langflow.
        flow_id (str): The ID of the flow to which the file belongs.

    Returns:
        dict: A dictionary containing the file path.

    Raises:
        UploadError: If an error occurs during the upload process.
    """
    try:
        url = f"{host}/api/v1/upload/{flow_id}"
        with Path(file_path).open("rb") as file:
            response = httpx.post(url, files={"file": file})
            if response.status_code in {httpx.codes.OK, httpx.codes.CREATED}:
                return response.json()
    except Exception as e:
        msg = f"Error uploading file: {e}"
        raise UploadError(msg) from e

    msg = f"Error uploading file: {response.status_code}"
    raise UploadError(msg)

def upload_file(file_path: str, host: str, flow_id: str, components: list[str], tweaks: dict | None = None):
    """Upload a file to Langflow and return the file path.

    Args:
        file_path (str): The path to the file to be uploaded.
        host (str): The host URL of Langflow.
        flow_id (str): The ID of the flow to which the file belongs.
        components (list[str]): List of component IDs or names that need the file.
        tweaks (dict, optional): A dictionary of tweaks to be applied to the file.

    Returns:
        dict: A dictionary containing the file path and any tweaks that were applied.

    Raises:
        UploadError: If an error occurs during the upload process.
    """
    try:
        response = upload(file_path, host, flow_id)
    except Exception as e:
        msg = f"Error uploading file: {e}"
        raise UploadError(msg) from e

    if not tweaks:
        tweaks = {}
    if response["file_path"]:
        for component in components:
            if isinstance(component, str):
                tweaks[component] = {"path": response["file_path"]}
            else:
                msg = f"Error uploading file: component ID or name must be a string. Got {type(component)}"
                raise UploadError(msg)
        return tweaks

    msg = "Error uploading file"
    raise UploadError(msg)

This code provides functions to upload a file to Langflow. The upload function handles the actual file upload, while upload_file manages additional logic for associating the uploaded file with specific components and applying tweaks ^[1][2].

To continue talking to Dosu, mention @dosu.

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[topflyer]

@dosu
Thank you.
I want code for API.
I want to integrate it with in my FastAPI app

[dosubot]

To integrate the Langflow file upload functionality into your FastAPI application using an API, you can use the following code snippet:

from fastapi import FastAPI, UploadFile, File, HTTPException
import httpx

app = FastAPI()

@app.post("/upload/{flow_id}")
async def upload_file_to_langflow(flow_id: str, file: UploadFile = File(...)):
    url = f"http://langflow-api-url/api/v1/files/upload/{flow_id}"
    headers = {"x-api-key": "YOUR_API_KEY"}  # Replace with your actual API key

    try:
        async with httpx.AsyncClient() as client:
            response = await client.post(
                url,
                files={"file": (file.filename, file.file, file.content_type)},
                headers=headers
            )
        response.raise_for_status()
        return response.json()
    except httpx.HTTPStatusError as e:
        raise HTTPException(status_code=e.response.status_code, detail=e.response.text)

Replace "http://langflow-api-url" with the actual URL of your Langflow API and "YOUR_API_KEY" with your API key. This code will upload a file to the specified flow in Langflow using the API. Make sure the flow_id is correct and corresponds to an existing flow in the system ^[1].

To continue talking to Dosu, mention @dosu.

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