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from flask import Flask, request, Response, stream_with_context
import requests
import os
import json
app = Flask(__name__)
# Target API base URL from environment variable
TARGET_API = os.getenv("TARGET_API", "https://huggingface.co")
# Path mappings from environment variable
# Expected format: {"path1": "mapped_path1", "path2": "mapped_path2"}
def get_path_mappings():
mappings_str = os.getenv("PATH_MAPPINGS", '{"/": "/"}')
try:
return json.loads(mappings_str)
except json.JSONDecodeError:
# Fallback to default mappings if JSON is invalid
return {
"/": "/",
}
PATH_MAPPINGS = get_path_mappings()
@app.route('/<path:path>', methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH'])
def proxy(path):
# Construct the full path
full_path = f"/{path}"
# Apply path mapping if matches
for original_path, new_path in PATH_MAPPINGS.items():
if full_path.startswith(original_path):
full_path = full_path.replace(original_path, new_path, 1)
break
# Construct target URL
target_url = f"{TARGET_API}{full_path}"
# Forward the request to the target API
headers = {key: value for key, value in request.headers if key != 'Host'}
# Handle streaming response
if request.method == 'POST':
response = requests.post(
target_url,
headers=headers,
json=request.get_json(silent=True),
params=request.args,
stream=True
)
elif request.method == 'GET':
response = requests.get(
target_url,
headers=headers,
params=request.args,
stream=True
)
elif request.method == 'PUT':
response = requests.put(
target_url,
headers=headers,
json=request.get_json(silent=True),
params=request.args,
stream=True
)
elif request.method == 'DELETE':
response = requests.delete(
target_url,
headers=headers,
params=request.args,
stream=True
)
elif request.method == 'PATCH':
response = requests.patch(
target_url,
headers=headers,
json=request.get_json(silent=True),
params=request.args,
stream=True
)
# Create a response with the same status code, headers, and streaming content
def generate():
for chunk in response.iter_content(chunk_size=8192):
yield chunk
# Create flask response
proxy_response = Response(
stream_with_context(generate()),
status=response.status_code
)
# Forward response headers
for key, value in response.headers.items():
if key.lower() not in ('content-length', 'transfer-encoding', 'connection'):
proxy_response.headers[key] = value
return proxy_response
@app.route('/', methods=['GET'])
def index():
return "service running."
if __name__ == '__main__':
app.run(host='0.0.0.0', port=7860, debug=False)
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