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README.md

twitter-api

This is an up-to-date twitter API wrapper that is based on the clojure http.async.client library. It offers the full taxonomy of twitter API's (streaming, search and restful) and has been tested to be working. The test coverage is reasonably complete, but I suppose more could be added.

Why did I make this library?

  • I felt the current offerings were a bit out of date
  • I wanted the efficiency of the async comms libraries
  • I needed some stuff from the headers returned by twitter (i.e. the rate-limiting stuff and etag)
  • I wanted full API coverage (restful, streaming and search)

Giants upon whose shoulders I have stood

##Leiningen

###NOTE: this library is fully tested under Clojure 1.4

Just add the following to your project.clj file in the dependencies section:

[twitter-api "0.7.5"]

Usage

All of the functions follow Twitter's naming conventions; we convert a resource's path into the function name. For example:

  • https://api.twitter.com/1.1/account/settings is available as account-settings
  • https://api.twitter.com/1.1/statuses/update_with_media is available as statuses-update-with-media

Parameters are uniform across the functions. All calls can accept:

  • :oauth-creds is the result of the make-oauth-creds function.
  • :params is a map of parameters to pass, eg, list_id=123 would be {:list-id 123}
  • :headers adds or overrides any of the request headers sent to Twitter.
  • :verb overrides the HTTP verb used to make the request, for resources that support it (eg, account-settings)
  • :callbacks attaches a custom callback to the request.

All of the API calls will return the full HTTP response of the request, including headers.

Examples

RESTful calls

(ns mynamespace
  (:use
   [twitter.oauth]
   [twitter.callbacks]
   [twitter.callbacks.handlers]
   [twitter.api.restful])
  (:import
   (twitter.callbacks.protocols SyncSingleCallback)))

(def my-creds (make-oauth-creds *app-consumer-key*
     			       		    *app-consumer-secret*
			       		        *user-access-token*
			       		        *user-access-token-secret*))

; simply retrieves the user, authenticating with the above credentials
; note that anything in the :params map gets the -'s converted to _'s
(users-show :oauth-creds my-creds :params {:screen-name "AdamJWynne"})

; supplying a custom header
(users-show :oauth-creds my-creds :params {:screen-name "AdamJWynne"} :headers {:x-blah-blah "value"})

; shows the users friends
(friendships-show :oauth-creds my-creds 
                  :params {:target-screen-name "AdamJWynne"})

; use a custom callback function that only returns the body of the response
(friendships-show :oauth-creds my-creds
                  :callbacks (SyncSingleCallback. response-return-body 
                                                  response-throw-error
                                                  exception-rethrow)      
	      :params {:target-screen-name "AdamJWynne"})

; upload a picture tweet with a text status attached, using the default sync-single callback
(statuses-update-with-media :oauth-creds *creds*
                            :body [(file-body-part "/pics/test.jpg")
                                  (status-body-part "testing")])

Streaming calls

(ns mynamespace
  (:use
   [twitter.oauth]
   [twitter.callbacks]
   [twitter.callbacks.handlers]
   [twitter.api.streaming])
  (:require
   [clojure.data.json :as json]
   [http.async.client :as ac])
  (:import
   (twitter.callbacks.protocols AsyncStreamingCallback)))

(def my-creds (make-oauth-creds *app-consumer-key*
			       		        *app-consumer-secret*
			       		        *user-access-token*
			       		        *user-access-token-secret*))

; retrieves the user stream, waits 1 minute and then cancels the async call
(def ^:dynamic *response* (user-stream :oauth-creds my-creds))
(Thread/sleep 60000)
((:cancel (meta *response*)))

; supply a callback that only prints the text of the status
(def ^:dynamic 
     *custom-streaming-callback* 
     (AsyncStreamingCallback. (comp println #(:text %) json/read-json #(str %2)) 
     		 	      (comp println response-return-everything)
			      exception-print))

(statuses-filter :params {:track "Borat"}
		 :oauth-creds my-creds
		 :callbacks *custom-streaming-callback*)

Notes

Unlike other API's, the parameters for each call are not hard-coded into their Clojure wrappers. I just figured that you could look them up on the dev.twitter.com and supply them in the :params map.

###Some points about making the calls:

  • You can authenticate or not, by including or omitting the :oauth-creds keyword and value. The value should be a twitter.oauth.OauthCredentials structure (usually the result of the twitter.oauth/make-oauth-creds function)
  • The callbacks decide how the call will be carried out - be it a single or streaming call, or an async or sync call. See the twitter.callbacks.protocols to see how it works
  • You can declare new methods that use different callbacks by either supplying them to the def-twitter-method macro, or inline at run time (via the :callbacks key/vaue), or both!

Building

Simply use leiningen to build the library into a jar with:

$ git clone git://github.com/adamwynne/twitter-api.git
Cloning into twitter-api...
remote: Counting objects: 167, done.
remote: Compressing objects: 100% (115/115), done.
remote: Total 167 (delta 68), reused 125 (delta 26)
Receiving objects: 100% (167/167), 33.60 KiB, done.
Resolving deltas: 100% (68/68), done.
$ cd twitter-api/
$ lein jar

Testing

###NOTE: You must populate the properties file resources/test.config before the tests will work.

You can use leiningen to test the library using the following snippet

$ lein test

Testing twitter.api.test.restful

Testing twitter.api.test.search

Testing twitter.api.test.streaming

Testing twitter.test-utils.core

Testing twitter.test.callbacks

Testing twitter.test.core

Testing twitter.test.creds

Testing twitter.test.request

Testing twitter.test.upload

Testing twitter.test.utils

Ran 48 tests containing 112 assertions.
0 failures, 0 errors.

Please note that the testing will take some time (about a minute or so) as its actually doing the calls to the twitter API's

License

This library made open-source by StreamScience

Follow @AdamJWynne and @StreamScience to save kittens and make rainbows.

Copyright (C) 2011 StreamScience

Distributed under the Eclipse Public License, the same as Clojure.