- Attempt to determine terminal encoding when tweeting.

[z_archive/twitter.git] / twitter / api.py

import urllib2

from exceptions import Exception

from twitter.twitter_globals import POST_ACTIONS
from twitter.auth import UserPassAuth, NoAuth

def _py26OrGreater():
    import sys
    return sys.hexversion > 0x20600f0

if _py26OrGreater():
    import json
else:
    import simplejson as json

class TwitterError(Exception):
    """
    Base Exception thrown by the Twitter object when there is a
    general error interacting with the API.
    """
    pass

class TwitterHTTPError(TwitterError):
    """
    Exception thrown by the Twitter object when there is an
    HTTP error interacting with twitter.com.
    """
    def __init__(self, e, uri, format, encoded_args):
      self.e = e
      self.uri = uri
      self.format = format
      self.encoded_args = encoded_args

    def __str__(self):
        return (
            "Twitter sent status %i for URL: %s.%s using parameters: "
            "(%s)\ndetails: %s" %(
                self.e.code, self.uri, self.format, self.encoded_args, 
                self.e.fp.read()))

class TwitterCall(object):
    def __init__(
        self, auth, format, domain, uri="", agent=None,
        encoded_args=None, secure=True):
        self.auth = auth
        self.format = format
        self.domain = domain
        self.uri = uri
        self.agent = agent
        self.encoded_args = encoded_args
        self.secure = secure

    def __getattr__(self, k):
        try:
            return object.__getattr__(self, k)
        except AttributeError:
            return TwitterCall(
                self.auth, self.format, self.domain,
                self.uri + "/" + k, self.agent, self.encoded_args, self.secure)

    def __call__(self, **kwargs):
        uri = self.uri.strip("/")
        method = "GET"
        for action in POST_ACTIONS:
            if self.uri.endswith(action):
                method = "POST"
                if (self.agent):
                    kwargs["source"] = self.agent
                break

        secure_str = ''
        if self.secure:
            secure_str = 's'
        dot = ""
        if self.format != '':
            dot = "."
        uriBase = "http%s://%s/%s%s%s" %(
                    secure_str, self.domain, uri, dot, self.format)

        if (not self.encoded_args):
            if kwargs.has_key('id'):
                uri += "/%s" %(kwargs['id'])

            self.encoded_args = self.auth.encode_params(uriBase, method, kwargs)

        argStr = ""
        argData = None
        if (method == "GET"):
            if self.encoded_args:
                argStr = "?%s" %(self.encoded_args)
        else:
            argData = self.encoded_args

        headers = {}
        if (self.agent):
            headers["X-Twitter-Client"] = self.agent
        if self.auth is not None:
            headers.update(self.auth.generate_headers())

        req = urllib2.Request(uriBase+argStr, argData, headers)
        
        try:
            handle = urllib2.urlopen(req)
            if "json" == self.format:
                return json.loads(handle.read())
            else:
                return handle.read()
        except urllib2.HTTPError, e:
            if (e.code == 304):
                return []
            else:
                raise TwitterHTTPError(e, uri, self.format, self.encoded_args)

class Twitter(TwitterCall):
    """
    The minimalist yet fully featured Twitter API class.

    Get RESTful data by accessing members of this class. The result
    is decoded python objects (lists and dicts).

    The Twitter API is documented here:

      http://apiwiki.twitter.com/
      http://groups.google.com/group/twitter-development-talk/web/api-documentation

    Examples::

      twitter = Twitter("hello@foo.com", "password123")

      # Get the public timeline
      twitter.statuses.public_timeline()

      # Get a particular friend's timeline
      twitter.statuses.friends_timeline(id="billybob")

      # Also supported (but totally weird)
      twitter.statuses.friends_timeline.billybob()

      # Send a direct message
      twitter.direct_messages.new(
          user="billybob",
          text="I think yer swell!")

    Searching Twitter::

      twitter_search = Twitter(domain="search.twitter.com")

      # Find the latest search trends
      twitter_search.trends()

      # Search for the latest News on #gaza
      twitter_search.search(q="#gaza")


    Using the data returned
    -----------------------

    Twitter API calls return decoded JSON. This is converted into
    a bunch of Python lists, dicts, ints, and strings. For example::

      x = twitter.statuses.public_timeline()

      # The first 'tweet' in the timeline
      x[0]

      # The screen name of the user who wrote the first 'tweet'
      x[0]['user']['screen_name']


    Getting raw XML data
    --------------------

    If you prefer to get your Twitter data in XML format, pass
    format="xml" to the Twitter object when you instantiate it::

      twitter = Twitter(format="xml")

      The output will not be parsed in any way. It will be a raw string
      of XML.

    """
    def __init__(
        self, email=None, password=None, format="json",
        domain="api.twitter.com", agent=None, secure=True, auth=None,
        api_version=''):
        """
        Create a new twitter API connector.

        Pass an `auth` parameter to use the credentials of a specific
        user. Generally you'll want to pass an `OAuth`
        instance. Alternately you can pass `email` and `password`
        parameters but this authentication mode will be deactive by
        Twitter in the future and is not recommended.

        `domain` lets you change the domain you are connecting. By
        default it's twitter.com but `search.twitter.com` may be
        useful too.

        If `secure` is False you will connect with HTTP instead of
        HTTPS.

        The value of `agent` is sent in the `X-Twitter-Client`
        header. This is deprecated. Instead Twitter determines the
        application using the OAuth Client Key and Client Key Secret
        parameters.

        `api_version` is used to set the base uri. By default it's
        nothing, but if you set it to '1' your URI will start with
        '1/'.
        """
        
        if email is not None or password is not None:
            if auth:
                raise ValueError(
                    "Can't specify 'email'/'password' and 'auth' params"
                    " simultaneously.")
            auth = UserPassAuth(email, password)

        if not auth:
            auth = NoAuth()

        if (format not in ("json", "xml", "")):
            raise ValueError("Unknown data format '%s'" %(format))

        uri = ""
        if api_version:
            uri = str(api_version)

        TwitterCall.__init__(
            self, auth, format, domain, uri, agent, 
            secure=secure)

__all__ = ["Twitter", "TwitterError", "TwitterHTTPError"]