Create app.py

app.py

@@ -0,0 +1,80 @@
+from flask import Flask, request, Response
+import requests
+import os
+
+app = Flask(__name__)
+
+# 代理的目标域名
+TARGET_DOMAIN = os.environ.get("TARGET_DOMAIN", "https://api.chatanywhere.tech")  # 允许通过环境变量配置
+
+@app.route('/', defaults={'path': ''}, methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'])
+@app.route('/<path:path>', methods=['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'])
+def proxy(path):
+   """
+   代理所有请求到目标域名。
+   """
+   target_url = f"{TARGET_DOMAIN}/{path}?{request.query_string.decode()}"
+
+   try:
+       # 构造请求头
+       headers = dict(request.headers)
+       # 删除 Host 头，防止目标服务器出错
+       headers.pop('Host', None)
+       # 删除 Content-Length，让 requests 自动处理
+       headers.pop('Content-Length', None)
+
+
+       # 发送请求
+       response = requests.request(
+           method=request.method,
+           url=target_url,
+           headers=headers,
+           data=request.get_data(),  # 获取原始请求体
+           stream=True,  # 使用流式传输，处理大文件
+           allow_redirects=False # 禁止重定向，让客户端处理
+       )
+
+
+       # 构造响应
+       excluded_headers = ['content-encoding', 'content-length', 'transfer-encoding', 'connection']
+       response_headers = [(name, value) for (name, value) in response.headers.items()
+                           if name.lower() not in excluded_headers]
+
+       proxy_response = Response(response.raw.read(),  # 使用 raw.read() 读取流式响应
+                                 response.status_code,
+                                 headers=response_headers)
+
+       # 添加 CORS 头
+       proxy_response.headers['Access-Control-Allow-Origin'] = '*'
+       proxy_response.headers['Access-Control-Allow-Methods'] = 'GET, POST, OPTIONS, PUT, DELETE, PATCH'
+       proxy_response.headers['Access-Control-Allow-Headers'] = 'Content-Type, Authorization'
+       proxy_response.headers['Access-Control-Allow-Credentials'] = 'true'
+
+       return proxy_response
+
+   except requests.exceptions.RequestException as e:
+       print(f"代理请求出错: {e}")
+       return Response(f"代理服务器出错: {e}", status=500)
+
+   except Exception as e:
+       print(f"其他错误: {e}")
+       return Response(f"代理服务器出错: {e}", status=500)
+
+
+@app.after_request
+def after_request(response):
+   """
+   处理 OPTIONS 请求，添加 CORS 头。
+   """
+   if request.method == 'OPTIONS':
+       response.headers['Access-Control-Allow-Origin'] = '*'
+       response.headers['Access-Control-Allow-Methods'] = 'GET, POST, OPTIONS, PUT, DELETE, PATCH'
+       response.headers['Access-Control-Allow-Headers'] = 'Content-Type, Authorization'
+       response.headers['Access-Control-Allow-Credentials'] = 'true'
+   return response
+
+
+if __name__ == '__main__':
+   port = int(os.environ.get("PORT", 8000))
+   print(f"Flask 服务器已启动，监听 {port} 端口")
+   app.run(debug=True, host='0.0.0.0', port=port)