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Commit | Line | Data |
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1 | try: | |
2 | import urllib.request as urllib_request | |
3 | import urllib.error as urllib_error | |
4 | import io | |
5 | except ImportError: | |
6 | import urllib2 as urllib_request | |
7 | import urllib2 as urllib_error | |
8 | import json | |
9 | from ssl import SSLError | |
10 | import socket | |
11 | ||
12 | from .api import TwitterCall, wrap_response | |
13 | ||
14 | class TwitterJSONIter(object): | |
15 | ||
16 | def __init__(self, handle, uri, arg_data, block=True): | |
17 | self.decoder = json.JSONDecoder() | |
18 | self.handle = handle | |
19 | self.buf = b"" | |
20 | self.block = block | |
21 | ||
22 | def __iter__(self): | |
23 | sock = self.handle.fp._sock.fp._sock | |
24 | sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1) | |
25 | if not self.block: | |
26 | sock.setblocking(False) | |
27 | while True: | |
28 | try: | |
29 | utf8_buf = self.buf.decode('utf8').lstrip() | |
30 | res, ptr = self.decoder.raw_decode(utf8_buf) | |
31 | self.buf = utf8_buf[ptr:].encode('utf8') | |
32 | yield wrap_response(res, self.handle.headers) | |
33 | continue | |
34 | except ValueError as e: | |
35 | if self.block: | |
36 | pass | |
37 | else: | |
38 | yield None | |
39 | except urllib_error.HTTPError as e: | |
40 | raise TwitterHTTPError(e, uri, self.format, arg_data) | |
41 | # this is a non-blocking read (ie, it will return if any data is available) | |
42 | try: | |
43 | self.buf += sock.recv(1024) | |
44 | except SSLError as e: | |
45 | if (not self.block) and (e.errno == 2): | |
46 | # Apparently this means there was nothing in the socket buf | |
47 | pass | |
48 | else: | |
49 | raise | |
50 | ||
51 | def handle_stream_response(req, uri, arg_data, block): | |
52 | handle = urllib_request.urlopen(req,) | |
53 | return iter(TwitterJSONIter(handle, uri, arg_data, block)) | |
54 | ||
55 | class TwitterStreamCall(TwitterCall): | |
56 | def _handle_response(self, req, uri, arg_data, _timeout=None): | |
57 | return handle_stream_response(req, uri, arg_data, block=True) | |
58 | ||
59 | class TwitterStreamCallNonBlocking(TwitterCall): | |
60 | def _handle_response(self, req, uri, arg_data, _timeout=None): | |
61 | return handle_stream_response(req, uri, arg_data, block=False) | |
62 | ||
63 | class TwitterStream(TwitterStreamCall): | |
64 | """ | |
65 | The TwitterStream object is an interface to the Twitter Stream API | |
66 | (stream.twitter.com). This can be used pretty much the same as the | |
67 | Twitter class except the result of calling a method will be an | |
68 | iterator that yields objects decoded from the stream. For | |
69 | example:: | |
70 | ||
71 | twitter_stream = TwitterStream(auth=UserPassAuth('joe', 'joespassword')) | |
72 | iterator = twitter_stream.statuses.sample() | |
73 | ||
74 | for tweet in iterator: | |
75 | ...do something with this tweet... | |
76 | ||
77 | The iterator will yield tweets forever and ever (until the stream | |
78 | breaks at which point it raises a TwitterHTTPError.) | |
79 | ||
80 | The `block` parameter controls if the stream is blocking. Default | |
81 | is blocking (True). When set to False, the iterator will | |
82 | occasionally yield None when there is no available message. | |
83 | """ | |
84 | def __init__( | |
85 | self, domain="stream.twitter.com", secure=True, auth=None, | |
86 | api_version='1', block=True): | |
87 | uriparts = () | |
88 | uriparts += (str(api_version),) | |
89 | ||
90 | if block: | |
91 | call_cls = TwitterStreamCall | |
92 | else: | |
93 | call_cls = TwitterStreamCallNonBlocking | |
94 | ||
95 | TwitterStreamCall.__init__( | |
96 | self, auth=auth, format="json", domain=domain, | |
97 | callable_cls=call_cls, | |
98 | secure=secure, uriparts=uriparts) |