downloader.py 文件源码

def __get_download_headers__(self):
        if self.url.startswith("https"):
            try:
                conn = urllib2.urlopen(urllib2.Request(self.url.replace("https", "http"), headers=self._headers))
                conn.fp._sock.close()
                self.url = self.url.replace("https", "http")
            except:
                pass

        for x in range(3):
            try:
                if not sys.hexversion > 0x0204FFFF:
                    conn = urllib2.urlopen(urllib2.Request(self.url, headers=self._headers))
                    conn.fp._sock.close()
                else:
                    conn = urllib2.urlopen(urllib2.Request(self.url, headers=self._headers), timeout=5)

            except:
                self.response_headers = dict()
                self._state = self.states.error
            else:
                self.response_headers = conn.headers.dict
                self._state = self.states.stopped
                break