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我正在使用 git repo 中包含的 test_client2。发出请求返回<Response [200]>，显然系统正在运行，但它不打印任何数据。什么可能导致这种情况？

此处添加了完整代码。我对从 GIT 提取的原始代码所做的唯一更改是为 auth_token 添加 CONSUMER_SECRET 和 CONSUMER_KEY 值（这似乎有效）并更改其中一个打印函数以明确显示结果的开始位置。

""" An interactive script for testing Khan Academy API Authentication. 

This is an example of how to use the /api/auth2 authentication flow.

See https://github.com/Khan/khan-api/wiki/Khan-Academy-API-Authentication for
documentation.
"""

import cgi
import rauth
import SimpleHTTPServer
import SocketServer
import time
import webbrowser

# You can get a CONSUMER_KEY and CONSUMER_SECRET for your app here:
# http://www.khanacademy.org/api-apps/register
CONSUMER_SECRET = 'Redacted but auth-token works'
CONSUMER_KEY = 'Redacted'

CALLBACK_BASE = '127.0.0.1'
SERVER_URL = 'http://www.khanacademy.org'

DEFAULT_API_RESOURCE = '/api/v1/playlists'
VERIFIER = None


# Create the callback server that's used to set the oauth verifier after the
# request token is authorized.
def create_callback_server():
    class CallbackHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
        def do_GET(self):
            global VERIFIER

            params = cgi.parse_qs(self.path.split('?', 1)[1],
                keep_blank_values=False)
            VERIFIER = params['oauth_verifier'][0]

            self.send_response(200)
            self.send_header('Content-Type', 'text/plain')
            self.end_headers()
            self.wfile.write('OAuth request token fetched and authorized;' +
                ' you can close this window.')

        def log_request(self, code='-', size='-'):
            pass

    server = SocketServer.TCPServer((CALLBACK_BASE, 0), CallbackHandler)
    return server


# Make an authenticated API call using the given rauth session.
def get_api_resource(session):
    resource_url = raw_input("Resource relative url (e.g. %s): " %
        DEFAULT_API_RESOURCE) or DEFAULT_API_RESOURCE

    url = SERVER_URL + resource_url
    split_url = url.split('?', 1)
    params = {}

    # Separate out the URL's parameters, if applicable.
    if len(split_url) == 2:
        url = split_url[0]
        params = cgi.parse_qs(split_url[1], keep_blank_values=False)

    start = time.time()
    response = session.get(url, params=params)
    end = time.time()

    print "Result\n"
    print response
    print "\nTime: %ss\n" % (end - start)

def run_tests():
    global CONSUMER_KEY, CONSUMER_SECRET, SERVER_URL

    # Set consumer key, consumer secret, and server base URL from user input or
    # use default values.
    CONSUMER_KEY = raw_input("consumer key: ") or CONSUMER_KEY
    CONSUMER_SECRET = raw_input("consumer secret: ") or CONSUMER_SECRET
    SERVER_URL = raw_input("server base url: ") or SERVER_URL

    # Create an OAuth1Service using rauth.
    service = rauth.OAuth1Service(
           name='test',
           consumer_key=CONSUMER_KEY,
           consumer_secret=CONSUMER_SECRET,
           request_token_url=SERVER_URL + '/api/auth2/request_token',
           access_token_url=SERVER_URL + '/api/auth2/access_token',
           authorize_url=SERVER_URL + '/api/auth2/authorize',
           base_url=SERVER_URL + '/api/auth2')

    callback_server = create_callback_server()

    # 1. Get a request token.
    request_token, secret_request_token = service.get_request_token(
        params={'oauth_callback': 'http://%s:%d/' %
            (CALLBACK_BASE, callback_server.server_address[1])})

    # 2. Authorize your request token.
    authorize_url = service.get_authorize_url(request_token)
    webbrowser.open(authorize_url)

    callback_server.handle_request()
    callback_server.server_close()

    # 3. Get an access token.
    session = service.get_auth_session(request_token, secret_request_token,
        params={'oauth_verifier': VERIFIER})

    # Repeatedly prompt user for a resource and make authenticated API calls.
    print
    while(True):
        get_api_resource(session)


def main():
    run_tests()

if __name__ == "__main__":
    main()
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