app.py

# uvicorn app:app --host 0.0.0.0 --port 7860 --reload

from fastapi import FastAPI, Request, HTTPException
import re
import httpx

app = FastAPI()

@app.get("/")
def greet_json():
    return {"Hello": "World!"}

@app.get("/v1/{dest_url:path}")
async def gre_dest_url(dest_url: str):
    return dest_url

@app.post("/v1/{dest_url:path}")
async def proxy_url(dest_url: str, request: Request):
    body = await request.body()
    headers = dict(request.headers)  # 将请求头转换为字典
    
    # 移除 Content-Length 和 Host 头部
    if 'content-length' in headers:
        del headers['content-length']
    if 'host' in headers:
        del headers['host']
        
    headers['User-Agent']='PostmanRuntime/7.43.0'

    dest_url = re.sub('/', '://', dest_url, count=1)

    async with httpx.AsyncClient() as client:
        try:
            # 向目标 URL 发送 POST 请求
            response = await client.post(dest_url, content=body, headers=headers)
            
            # 检查响应状态码
            if response.status_code == 200:
                # 检查响应内容类型是否为 JSON
                if 'application/json' in response.headers.get('content-type', ''):
                    return response.json()
                else:
                    return {"error": "Response is not in JSON format"}
            else:
                # 将错误响应转换为 JSON 格式并返回给客户端
                try:
                    error_data = response.json()
                except ValueError:
                    error_data = {"status_code": response.status_code, "detail": response.text}
                return error_data
        
        except httpx.RequestError as e:
            # 处理请求错误
            raise HTTPException(status_code=500, detail=str(e))