misc.py 文件源码

def valid_pub_url(url, proxy=False):
        """Verify that the publisher URL contains only valid characters.
        If 'proxy' is set to True, some checks are relaxed."""

        if not url:
                return False

        # First split the URL and check if the scheme is one we support
        o = urlsplit(url)

        if not o[0] in _valid_proto:
                return False

        if o[0] == "file":
                path = urlparse(url, "file", allow_fragments=0)[2]
                path = url2pathname(path)
                if not os.path.abspath(path):
                        return False
                # No further validation to be done.
                return True

        # Next verify that the network location is valid
        if six.PY3:
                host = urllib.parse.splitport(o[1])[0]
        else:
                host = urllib.splitport(o[1])[0]

        if proxy:
                # We may have authentication details in the proxy URI, which
                # we must ignore when checking for hostname validity.
                host_parts = host.split("@")
                if len(host_parts) == 2:
                        host = host[1]

        if not host or _invalid_host_chars.match(host):
                return False

        if _hostname_re.match(host):
                return True

        return False