Python Robotparser 超时等价物

Question

Python 3.3.0 有没有办法设置 robotparser.read() 函数的超时时间？(比如在urllib.request urlopen中)

60 秒的默认超时有点过激。

(我正在自学 Python。)

Python 3.3.0 - robotparser

Python 3.3.0 - urllib.request

Answer 1

不，您必须使用 socket.setdefaulttimeout() 设置全局默认超时，或继承 RobotFileParser 类以添加自定义超时:

from urllib.robotparser import RobotFileParser
import urllib.request

class TimoutRobotFileParser(RobotFileParser):
    def __init__(self, url='', timeout=60):
        super().__init__(url)
        self.timeout = timeout

    def read(self):
        """Reads the robots.txt URL and feeds it to the parser."""
        try:
            f = urllib.request.urlopen(self.url, timeout=self.timeout)
        except urllib.error.HTTPError as err:
            if err.code in (401, 403):
                self.disallow_all = True
            elif err.code >= 400:
                self.allow_all = True
        else:
            raw = f.read()
            self.parse(raw.decode("utf-8").splitlines())