Question

我最近向Heroku部署了一个Web应用程序，试图从Twitter Streaming API下载推文。它工作60秒，但随后Heroku抛出错误：

 Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch

要连接到API，我使用PycURL（C库libcurl的包装器）来打开与端点uri的连接。我将PycURL使用的本地端口设置为Heroku指定的$ PORT变量。相关代码如下：

def collect_debug_info(self, debug_type, debug_msg):
    if debug_type == 0 and debug_msg.decode('utf-8')[0] == 'L':
        print('debug(%s): %s' % (debug_type, debug_msg))

def setup_connection(self):
    # Creates persistent HTTP connection to Streaming API endpoint using cURL.
    if self.conn:
        self.conn.close()
        self.buffer = ''
    self.conn = pycurl.Curl()
    self.conn.setopt(pycurl.URL, API_ENDPOINT_URL)
    self.conn.setopt(pycurl.USERAGENT, USER_AGENT)
    # Using gzip is optional but saves us bandwidth.
    self.conn.setopt(pycurl.ENCODING, 'deflate, gzip')
    self.conn.setopt(pycurl.POST, 1)
    self.conn.setopt(pycurl.POSTFIELDS, urllib.parse.urlencode(POST_PARAMS))
    self.conn.setopt(pycurl.HTTPHEADER, ['Host: stream.twitter.com',
                                         'Authorization: %s' % self.get_oauth_header()])
    self.conn.setopt(pycurl.LOCALPORT, int(os.environ.get('PORT')))
    self.conn.setopt(pycurl.VERBOSE, 1)
    self.conn.setopt(pycurl.DEBUGFUNCTION, self.collect_debug_info)
    # self.handle_tweet is the method that is called when new tweets arrive
    self.conn.setopt(pycurl.WRITEFUNCTION, self.handle_tweet)

    print('Port var: %s' % os.environ.get('PORT'))

collect_debug_info返回的文字为debug(0): b'Local port: 19379\n'

print('Port var: %s' % os.environ.get('PORT'))返回的文字为Port var: 19379

我的Procfile如下：

web: python3 "twitter streaming data.py"

＆＃34; twitter streaming data.py＆＃34;包含我发布的代码以及其他代码。

绑定到Heroku托管的Python Web应用程序中的$ PORT

0 个答案: