Class _FeedURLHandler

pattern/web/feed/feedparser.py:2901–2942

    return data

class _FeedURLHandler(urllib2.HTTPDigestAuthHandler, urllib2.HTTPRedirectHandler, urllib2.HTTPDefaultErrorHandler):
    def http_error_default(self, req, fp, code, msg, headers):
        # The default implementation just raises HTTPError.
        # Forget that.
        fp.status = code
        return fp

    def http_error_301(self, req, fp, code, msg, hdrs):
        result = urllib2.HTTPRedirectHandler.http_error_301(self, req, fp,
                                                            code, msg, hdrs)
        result.status = code
        result.newurl = result.geturl()
        return result
    # The default implementations in urllib2.HTTPRedirectHandler
    # are identical, so hardcoding a http_error_301 call above
    # won't affect anything
    http_error_300 = http_error_301
    http_error_302 = http_error_301
    http_error_303 = http_error_301
    http_error_307 = http_error_301

    def http_error_401(self, req, fp, code, msg, headers):
        # Check if
        # - server requires digest auth, AND
        # - we tried (unsuccessfully) with basic auth, AND
        # If all conditions hold, parse authentication information
        # out of the Authorization header we sent the first time
        # (for the username and password) and the WWW-Authenticate
        # header the server sent back (for the realm) and retry
        # the request with the appropriate digest auth headers instead.
        # This evil genius hack has been brought to you by Aaron Swartz.
        host = urlparse.urlparse(req.get_full_url())[1]
        if base64 is None or 'Authorization' not in req.headers \
                          or 'WWW-Authenticate' not in headers:
            return self.http_error_default(req, fp, code, msg, headers)
        auth = _base64decode(req.headers['Authorization'].split(' ')[1])
        user, passw = auth.split(':')
        realm = re.findall('realm="([^"]*)"', headers['WWW-Authenticate'])[0]
        self.add_password(realm, host, user, passw)
        retry = self.http_error_auth_reqed('www-authenticate', host, req, headers)
        self.reset_retry_count()
        return retry

def _open_resource(url_file_stream_or_string, etag, modified, agent, referrer, handlers, request_headers):
    """URL, filename, or string --> stream