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分享一下完全不依赖 asyncio 也支持异步语法的库

 3 years ago
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V2EX  ›  Python

分享一下完全不依赖 asyncio 也支持异步语法的库

  sujin190 · snower · 18 小时 5 分钟前 · 1371 次点击

https://github.com/snower/sevent

异步语法的支持完全不依赖 asyncio，当然并没有说可以替代 asyncio 或者更好啥的，只是一种实现，如果有对异步 io 或者 python 异步语法实现感兴趣的可以一看吧。

只要是用于代理流量转发这样的场景，所以接口毕竟简单，当然支持范围也就没 asyncio 那么广了，从 echo 测试来看，性能还是要好于 asyncio 一些的，helpers 中也简单实现了几个工具。

HTTP 请求测试

import sevent

async def http_test():
    s = sevent.tcp.Socket()
    await s.connectof(('www.baidu.com', 80))
    await s.send(b'GET / HTTP/1.1\r\nHost: www.baidu.com\r\nConnection: Close\r\nUser-Agent: curl/7.58.0\r\nAccept: */*\r\n\r\n')

    data = b''
    while True:
        try:
            data += (await s.recv()).read()
        except sevent.tcp.SocketClosed:
            break
    print(data.decode("utf-8"))
    await s.closeof()

sevent.run( http_test)

TCP 端口转发

import sys
import sevent

async def tcp_port_forward_server():
    server = sevent.tcp.Server()
    server.listen(("0.0.0.0", int(sys.argv[1])))

    while True:
        conn = await server.accept()
        pconn = sevent.tcp.Socket()
        pconn.connect((sys.argv[2], int(sys.argv[3])))
        conn.link(pconn)

sevent.run(tcp_port_forward_server)

report

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