client.py 文件源码

def retrieve_discovery_doc(serviceName, version,
                           discoveryServiceUrl=DISCOVERY_URI):
    params = {'api': serviceName, 'apiVersion': version}
    requested_url = uritemplate.expand(discoveryServiceUrl, params)

    # REMOTE_ADDR is defined by the CGI spec [RFC3875] as the environment
    # variable that contains the network address of the client sending the
    # request. If it exists then add that to the request for the discovery
    # document to avoid exceeding the quota on discovery requests.
    if 'REMOTE_ADDR' in os.environ:
        requested_url = _add_query_parameter(requested_url, 'userIp',
                                             os.environ['REMOTE_ADDR'])

    http = httplib2.Http()
    resp, content = http.request(requested_url)
    if resp.status >= 400:
        raise HttpError(resp, content, uri=requested_url)

    try:
        service = json.loads(content)
    except ValueError:
        raise InvalidJsonError(
            'Bad JSON: %s from %s.' % (content, requested_url))

    # We return content instead of the JSON deserialized service because
    # build_from_document() consumes a string rather than a dictionary.
    return content