爬虫日记(102)：Twisted:使用Deferred重构服务器代码

Posted 2021-08-31 caimouse

前面实现了一个诗歌下载的服务器，采用socket底层来实现的，这样比较关注底层的细节，并且还是一个阻塞的服务器，这样服务器的性能肯定不会太好。接着下来，重构这个服务器的代码。

原来服务器的代码：

# This is the blocking version of the Slow Poetry Server.

import optparse, os, socket, time


def parse_args():
    usage = """usage: %prog [options] poetry-file

This is the Slow Poetry Server, blocking edition.
Run it like this:

  python slowpoetry.py <path-to-poetry-file>

If you are in the base directory of the twisted-intro package,
you could run it like this:

  python blocking-server/slowpoetry.py poetry/ecstasy.txt

to serve up John Donne\'s Ecstasy, which I know you want to do.
"""

    parser = optparse.OptionParser(usage)

    help = "The port to listen on. Default to a random available port."
    parser.add_option(\'--port\', type&#