HTTP Proxy API

This repository contains two implementations of a generic HTTP proxy API: one using FastAPI and the other using Flask. Both APIs forward incoming requests to a target API specified via query parameters.

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Files

• fast_api.py: Implementation using FastAPI with async support.
• flask_api.py: Implementation using Flask (synchronous).

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Features

• Supports all common HTTP methods: GET, POST, PUT, DELETE, PATCH.
• Forwards headers and body to the target API.
• Filters query parameters to exclude api when forwarding.
• Excludes certain headers that may break the response (content-encoding, transfer-encoding, connection).

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Installation

1. Create a virtual environment (optional but recommended):

python -m venv venv
source venv/bin/activate  # Linux/macOS
venv\Scripts\activate     # Windows

2. Install dependencies:

pip install fastapi[all] flask requests httpx uvicorn

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Usage

FastAPI Version

Run the FastAPI proxy:

uvicorn fast_api:app --reload --port 8000

Flask Version

Run the Flask proxy:

python flask_api.py

Example request using curl:

curl "http://127.0.0.1:8000/users/1?api=https://jsonplaceholder.typicode.com"

• This will forward the request to https://jsonplaceholder.typicode.com/users/1.

or

curl "http://127.0.0.1:8000/users/?api=https://api.telegram.org"

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Notes

• Both implementations forward headers and body.
• Use api query parameter to specify the target API base URL.
• Any additional query parameters will also be forwarded.

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Example with POST

curl -X POST "http://127.0.0.1:8000/posts?api=https://jsonplaceholder.typicode.com" \
     -H "Content-Type: application/json" \
     -d '{"title": "foo", "body": "bar", "userId": 1}'

• This forwards the POST request to the target API with JSON body.