我目前正在使用twitter API流(http://stream.twitter.com/1/statuses/sample.json),因此我不断收到数据.我希望一旦我从中检索到X个对象就停止cURLing流(在示例中,我将10作为任意数字).
您可以在下面的代码中查看我是如何尝试关闭连接的. curling.perform()下面的代码永远不会执行,因为它是一个连续的数据流.所以我试图在body_callback中关闭流,但是因为perform()当前正在运行,所以我无法调用close().
任何帮助,将不胜感激.
码：
# Imports
import pycurl # Used for doing cURL request
import base64 # Used to encode username and API Key
import json # Used to break down the json objects
# Settings to access stream and API
userName = 'twitter_username' # My username
password = 'twitter_password' # My API Key
apiURL = 'http://stream.twitter.com/1/statuses/sample.json' # the twitter api
tweets = [] # An array of Tweets
# Methods to do with the tweets array
def how_many_tweets():
print 'Collected: ',len(tweets)
return len(tweets)
class Tweet:
def __init__(self):
self.raw = ''
self.id = ''
self.content = ''
def decode_json(self):
return True
def set_id(self):
return True
def set_content(self):
return True
def set_raw(self,data):
self.raw = data
# Class to print out the stream as it comes from the API
class Stream:
def __init__(self):
self.tweetBeingRead =''
def body_callback(self,buf):
# This gets whole Tweets,and adds them to an array called tweets
if(buf.startswith('{"in_reply_to_status_id_str"')): # This is the start of a tweet
# Added Tweet to Global Array Tweets
print 'Added:' # Priniting output to console
print self.tweetBeingRead # Printing output to console
theTweetBeingProcessed = Tweet() # Create a new Tweet Object
theTweetBeingProcessed.set_raw(self.tweetBeingRead) # Set its raw value to tweetBeingRead
tweets.append(theTweetBeingProcessed) # Add it to the global array of tweets
# Start processing a new tweet
self.tweet = buf # Start a new tweet from scratch
else:
self.tweetBeingRead = self.tweetBeingRead+buf
if(how_many_tweets()>10):
try:
curling.close() # This is where the problem lays. I want to close the stream
except Exception as CurlError:
print ' Tried closing stream: ',CurlError
# Used to initiate the cURLing of the Data Sift streams
datastream = Stream()
curling = pycurl.Curl()
curling.setopt(curling.URL,apiURL)
curling.setopt(curling.HTTPHEADER,['Authorization: '+base64.b64encode(userName+":"+password)])
curling.setopt(curling.WRITEFUNCTION,datastream.body_callback)
curling.perform() # This is cURLing starts
print 'I cant reach here.'
curling.close() # This never gets called. :(
最佳答案
