Langflow File Upload Utility

Examples of how to upload files to Langflow

Version: Langflow File API v2 | File API v1

File Only Upload

Uses Langflow File API v2

This component focuses purely on file selection and upload functionality. It provides a clean interface for choosing files with drag-and-drop support and file type validation.

File Upload API Endpoint:

http://127.0.0.1:7860/api/v2/files/

Langflow Run API Endpoint:

http://127.0.0.1:7860/api/v1/run/<flowId>

Payload:

{
  "input_value": "Analyze this file",
  "output_type": "chat",
  "input_type": "text"
}

Example Code

# Python example using requests
import requests
import json

# 1. Set the upload URL
url = "http://127.0.0.1:7860/api/v2/files/"

# 2. Prepare the file and payload
payload = {}
files = [
  ('file', ('yourfile.txt', open('yourfile.txt', 'rb'), 'application/octet-stream'))
]
headers = {
  'Accept': 'application/json'
}

# 3. Upload the file to Langflow
response = requests.request("POST", url, headers=headers, data=payload, files=files)
print(response.text)

# 4. Get the uploaded file path from the response
uploaded_data = response.json()
uploaded_path = uploaded_data.get('path')

# 5. Call the Langflow run endpoint with the uploaded file path
run_url = "http://127.0.0.1:7860/api/v1/run/<flowId>"
run_payload = {
    "input_value": "Analyze this file",
    "output_type": "chat",
    "input_type": "text",
    "tweaks": {
        "File-Component-Name": {
            "path": uploaded_path
        }
    }
}
run_headers = {
    'Content-Type': 'application/json',
    'Accept': 'application/json'
}
run_response = requests.post(run_url, headers=run_headers, data=json.dumps(run_payload))
langflow_data = run_response.json()
# Output only the message
message = None
try:
    message = langflow_data['outputs'][0]['outputs'][0]['results']['message']['data']['text']
except (KeyError, IndexError, TypeError):
    pass
print(message)

File Only Upload

File Component (Process File Only, No LLM/Agent)

Example Code