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这篇 spec 规定了 ASGI 如何处理 HTTP 和 Websocket 数据。

• HTTP:
  • http connection scope 包含的信息：type=http, http_version=1.0/1.1/2, method, scheme, path, query_string, root_path, headers, client=[host, port], server=[host, port]
  • http request: type=http.request, body, more_body=true/false.
  • restart start: type=http.response.start, status, headers
  • response body: type=http.response.body, body, more_body
  • disconnect: type=http.disconnect
• WebSocket:
  • scope: 跟 http 差不多，type=websocket, scheme=ws/wss, subprotocols, ...
  • Connection: type=websocket.connect
  • Accept: type=websocket.accept, subprotocol
  • Receive: type=websocket.receive, bytes, text
  • Send: type=websocket.send, bytes, text
  • Disconnect: type=websocket.disconnect, code
  • Close: type=websocket.close, code
• ASGI 提供了一套与 WSGI 字段一一对应的关系。