Object
Provides simple access to the Twitter Streaming API (dev.twitter.com/docs/streaming-api) for Ruby scripts that need to create a long connection to Twitter for tracking and other purposes.
Basic usage of the library is to call one of the provided methods and provide a block that will perform actions on a yielded Twitter::Tweet. For example:
TweetStream::Client.new.track('fail') do |status| puts "[#{status.user.screen_name}] #{status.text}" end
For information about a daemonized TweetStream client, view the TweetStream::Daemon class.
Creates a new API
# File lib/tweetstream/client.rb, line 44 def initialize(options={}) self.options = options merged_options = TweetStream.options.merge(options) Configuration::VALID_OPTIONS_KEYS.each do |key| send("#{key}=", merged_options[key]) end @callbacks = {} end
Close the connection to twitter without closing the eventmachine loop
# File lib/tweetstream/client.rb, line 487 def close_connection @stream.close_connection if @stream end
connect to twitter without starting a new EventMachine run loop
# File lib/tweetstream/client.rb, line 395 def connect(path, options = {}, &block) stream_parameters, callbacks = connection_options(path, options) @stream = EM::Twitter::Client.connect(stream_parameters) @stream.each do |item| begin hash = Yajl::Parser.parse(item, :symbolize_keys => true) rescue Yajl::ParseError invoke_callback(callbacks['error'], "Yajl::ParseError occured in stream: #{item}") next end unless hash.is_a?(::Hash) invoke_callback(callbacks['error'], "Unexpected JSON object in stream: #{item}") next end Twitter.identity_map = false respond_to(hash, callbacks, &block) yield_message_to(callbacks['anything'], hash) end @stream.on_error do |message| invoke_callback(callbacks['error'], message) end @stream.on_unauthorized do invoke_callback(callbacks['unauthorized']) end @stream.on_enhance_your_calm do invoke_callback(callbacks['enhance_your_calm']) end @stream.on_reconnect do |timeout, retries| invoke_callback(callbacks['reconnect'], timeout, retries) end @stream.on_max_reconnects do |timeout, retries| raise TweetStream::ReconnectError.new(timeout, retries) end @stream.on_no_data_received do invoke_callback(callbacks['no_data_received']) end @stream end
Make a call to the statuses/filter method of the Streaming API, you may provide :follow, :track or both as options to follow the tweets of specified users or track keywords. This method is provided separately for cases when it would conserve the number of HTTP connections to combine track and follow.
# File lib/tweetstream/client.rb, line 130 def filter(query_params = {}, &block) start('/1.1/statuses/filter.json', query_params.merge(:method => :post), &block) end
Returns all public statuses. The Firehose is not a generally available resource. Few applications require this level of access. Creative use of a combination of other resources and various access levels can satisfy nearly every application use case.
# File lib/tweetstream/client.rb, line 57 def firehose(query_parameters = {}, &block) start('/1.1/statuses/firehose.json', query_parameters, &block) end
Returns public statuses from or in reply to a set of users. Mentions ("Hello @user!") and implicit replies ("@user Hello!" created without pressing the reply "swoosh") are not matched. Requires integer user IDs, not screen names. Query parameters may be passed as the last argument.
# File lib/tweetstream/client.rb, line 105 def follow(*user_ids, &block) query_params = user_ids.pop if user_ids.last.is_a?(::Hash) query_params ||= {} filter(query_params.merge(:follow => user_ids), &block) end
Returns all statuses containing http: and https:. The links stream is not a generally available resource. Few applications require this level of access. Creative use of a combination of other resources and various access levels can satisfy nearly every application use case.
# File lib/tweetstream/client.rb, line 65 def links(query_parameters = {}, &block) start('/1.1/statuses/links.json', query_parameters, &block) end
Specifies a set of bounding boxes to track. Only tweets that are both created using the Geotagging API and are placed from within a tracked bounding box will be included in the stream – the user’s location field is not used to filter tweets (e.g. if a user has their location set to “San Francisco”, but the tweet was not created using the Geotagging API and has no geo element, it will not be included in the stream). Bounding boxes are specified as a comma separate list of longitude/latitude pairs, with the first pair denoting the southwest corner of the box longitude/latitude pairs, separated by commas. The first pair specifies the southwest corner of the box.
# File lib/tweetstream/client.rb, line 119 def locations(*locations_map, &block) query_params = locations_map.pop if locations_map.last.is_a?(::Hash) query_params ||= {} filter(query_params.merge(:locations => locations_map), &block) end
# File lib/tweetstream/client.rb, line 371 def on(event, &block) if block_given? @callbacks[event.to_s] = block self else @callbacks[event.to_s] end end
Set a Proc to be run whenever anything is encountered in the processing of the stream.
@client = TweetStream::Client.new @client.on_anything do |status| # do something with the status end
Block can take one or two arguments. |status (, client)| If no block is given, it will return the currently set timeline status proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 257 def on_anything(&block) on('anything', &block) end
Set a Proc to be run when a deletion notice is received from the Twitter stream. For example:
@client = TweetStream::Client.new @client.on_delete do |status_id, user_id| Tweet.delete(status_id) end
Block must take two arguments: the status id and the user id. If no block is given, it will return the currently set deletion proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 165 def on_delete(&block) on('delete', &block) end
Set a Proc to be run when a direct message is encountered in the processing of the stream.
@client = TweetStream::Client.new @client.on_direct_message do |direct_message| # do something with the direct message end
Block must take one argument: the direct message. If no block is given, it will return the currently set direct message proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 241 def on_direct_message(&block) on('direct_message', &block) end
Set a Proc to be run when enhance_your_calm signal is received.
@client = TweetStream::Client.new @client.on_enhance_your_calm do # do something, your account has been blocked end
# File lib/tweetstream/client.rb, line 317 def on_enhance_your_calm(&block) on('enhance_your_calm', &block) end
Set a Proc to be run when an HTTP error is encountered in the processing of the stream. Note that TweetStream will automatically try to reconnect, this is for reference only. Don't panic!
@client = TweetStream::Client.new @client.on_error do |message| # Make note of error message end
Block must take one argument: the error message. If no block is given, it will return the currently set error proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 214 def on_error(&block) on('error', &block) end
Set a Proc to be run on userstream events
@client = TweetStream::Client.new @client.event(:favorite) do |event| # do something with the status end
# File lib/tweetstream/client.rb, line 367 def on_event(event, &block) on(event, &block) end
Set a Proc to be run when a Site Stream friends list is received.
@client = TweetStream::Client.new @client.on_friends do |friends| # do something with the friends list end
# File lib/tweetstream/client.rb, line 347 def on_friends(&block) on('friends', &block) end
Set a Proc to be run when connection established. Called in EventMachine::Connection#post_init
@client = TweetStream::Client.new @client.on_inited do puts 'Connected...' end
# File lib/tweetstream/client.rb, line 296 def on_inited(&block) on('inited', &block) end
Set a Proc to be run when a rate limit notice is received from the Twitter stream. For example:
@client = TweetStream::Client.new @client.on_limit do |discarded_count| # Make note of discarded count end
Block must take one argument: the number of discarded tweets. If no block is given, it will return the currently set limit proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 197 def on_limit(&block) on('limit', &block) end
Set a Proc to be run when no data is received from the server and a stall occurs. Twitter defines this to be 90 seconds.
@client = TweetStream::Client.new @client.on_no_data_received do # Make note of no data, possi end
# File lib/tweetstream/client.rb, line 307 def on_no_data_received(&block) on('no_data_received', &block) end
Set a Proc to be run on reconnect.
@client = TweetStream::Client.new @client.on_reconnect do |timeout, retries| # Make note of the reconnection end
# File lib/tweetstream/client.rb, line 284 def on_reconnect(&block) on('reconnect', &block) end
Set a Proc to be run when a scrub_geo notice is received from the Twitter stream. For example:
@client = TweetStream::Client.new @client.on_scrub_geo do |up_to_status_id, user_id| Tweet.where(:status_id <= up_to_status_id) end
Block must take two arguments: the upper status id and the user id. If no block is given, it will return the currently set scrub_geo proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 181 def on_scrub_geo(&block) on('scrub_geo', &block) end
Set a Proc to be run when a stall warning is received.
@client = TweetStream::Client.new @client.on_stall_warning do |warning| # do something with the friends list end
# File lib/tweetstream/client.rb, line 357 def on_stall_warning(&block) on('stall_warning', &block) end
Set a Proc to be run when a status_withheld message is received.
@client = TweetStream::Client.new @client.on_status_withheld do |status| # do something with the status end
# File lib/tweetstream/client.rb, line 327 def on_status_withheld(&block) on('status_withheld', &block) end
Set a Proc to be run when a regular timeline message is encountered in the processing of the stream.
@client = TweetStream::Client.new @client.on_timeline_status do |status| # do something with the status end
Block can take one or two arguments. |status (, client)| If no block is given, it will return the currently set timeline status proc. When a block is given, the TweetStream::Client object is returned to allow for chaining.
# File lib/tweetstream/client.rb, line 273 def on_timeline_status(&block) on('timeline_status', &block) end
Set a Proc to be run when a status_withheld message is received.
@client = TweetStream::Client.new @client.on_user_withheld do |status| # do something with the status end
# File lib/tweetstream/client.rb, line 337 def on_user_withheld(&block) on('user_withheld', &block) end
# File lib/tweetstream/client.rb, line 446 def respond_to(hash, callbacks, &block) if hash[:control] && hash[:control][:control_uri] @control_uri = hash[:control][:control_uri] require 'tweetstream/site_stream_client' @control = TweetStream::SiteStreamClient.new(@control_uri, options) @control.on_error(&callbacks['error']) elsif hash[:warning] invoke_callback(callbacks['stall_warning'], hash[:warning]) elsif hash[:delete] && hash[:delete][:status] invoke_callback(callbacks['delete'], hash[:delete][:status][:id], hash[:delete][:status][:user_id]) elsif hash[:scrub_geo] && hash[:scrub_geo][:up_to_status_id] invoke_callback(callbacks['scrub_geo'], hash[:scrub_geo][:up_to_status_id], hash[:scrub_geo][:user_id]) elsif hash[:limit] && hash[:limit][:track] invoke_callback(callbacks['limit'], hash[:limit][:track]) elsif hash[:direct_message] yield_message_to(callbacks['direct_message'], Twitter::DirectMessage.new(hash[:direct_message])) elsif hash[:status_withheld] invoke_callback(callbacks['status_withheld'], hash[:status_withheld]) elsif hash[:user_withheld] invoke_callback(callbacks['user_withheld'], hash[:user_withheld]) elsif hash[:event] invoke_callback(callbacks[hash[:event].to_s], hash) elsif hash[:friends] invoke_callback(callbacks['friends'], hash[:friends]) elsif hash[:text] && hash[:user] @last_status = Twitter::Tweet.new(hash) yield_message_to(callbacks['timeline_status'], @last_status) yield_message_to(block, @last_status) if block_given? elsif hash[:for_user] yield_message_to(block, hash) if block_given? end end
Returns all retweets. The retweet stream is not a generally available resource. Few applications require this level of access. Creative use of a combination of other resources and various access levels can satisfy nearly every application use case. As of 9/11/2009, the site-wide retweet feature has not yet launched, so there are currently few, if any, retweets on this stream.
# File lib/tweetstream/client.rb, line 75 def retweet(query_parameters = {}, &block) start('/1.1/statuses/retweet.json', query_parameters, &block) end
Returns a random sample of all public statuses. The default access level provides a small proportion of the Firehose. The "Gardenhose" access level provides a proportion more suitable for data mining and research applications that desire a larger proportion to be statistically significant sample.
# File lib/tweetstream/client.rb, line 84 def sample(query_parameters = {}, &block) start('/1.1/statuses/sample.json', query_parameters, &block) end
Make a call to the userstream api
# File lib/tweetstream/client.rb, line 142 def sitestream(user_ids = [], query_params = {}, &block) stream_params = { :host => "sitestream.twitter.com" } query_params.merge!({ :method => :post, :follow => user_ids, :extra_stream_parameters => stream_params }) query_params.merge!(:with => 'followings') if query_params.delete(:followings) start('/1.1/site.json', query_params, &block) end
connect to twitter while starting a new EventMachine run loop
# File lib/tweetstream/client.rb, line 381 def start(path, query_parameters = {}, &block) if EventMachine.reactor_running? connect(path, query_parameters, &block) else EventMachine.epoll EventMachine.kqueue EventMachine::run do connect(path, query_parameters, &block) end end end
Terminate the currently running TweetStream and close EventMachine loop
# File lib/tweetstream/client.rb, line 481 def stop EventMachine.stop_event_loop @last_status end
# File lib/tweetstream/client.rb, line 491 def stop_stream @stream.stop if @stream end
Specify keywords to track. Queries are subject to Track Limitations, described in Track Limiting and subject to access roles, described in the statuses/filter method. Track keywords are case-insensitive logical ORs. Terms are exact-matched, and also exact-matched ignoring punctuation. Phrases, keywords with spaces, are not supported. Keywords containing punctuation will only exact match tokens. Query parameters may be passed as the last argument.
# File lib/tweetstream/client.rb, line 95 def track(*keywords, &block) query_params = keywords.pop if keywords.last.is_a?(::Hash) query_params ||= {} filter(query_params.merge(:track => keywords), &block) end
Make a call to the userstream api for currently authenticated user
# File lib/tweetstream/client.rb, line 135 def userstream(query_params = {}, &block) stream_params = { :host => "userstream.twitter.com" } query_params.merge!(:extra_stream_parameters => stream_params) start('/1.1/user.json', query_params, &block) end
# File lib/tweetstream/client.rb, line 508 def auth_params if auth_method.to_s == 'basic' { :basic => { :username => username, :password => password } } else { :oauth => { :consumer_key => consumer_key, :consumer_secret => consumer_secret, :token => oauth_token, :token_secret => oauth_token_secret } } end end
# File lib/tweetstream/client.rb, line 542 def connection_options(path, options) warn_if_callbacks(options) callbacks = @callbacks.dup OPTION_CALLBACKS.each do |callback| callbacks.merge(callback.to_s => options.delete(callback)) if options[callback] end inited_proc = options.delete(:inited) || @callbacks['inited'] extra_stream_parameters = options.delete(:extra_stream_parameters) || {} stream_params = { :path => path, :method => (options.delete(:method) || 'get').to_s.upcase, :user_agent => user_agent, :on_inited => inited_proc, :params => normalize_filter_parameters(options), :proxy => proxy }.merge(extra_stream_parameters).merge(auth_params) [stream_params, callbacks] end
A utility method used to invoke callback methods against the Client
# File lib/tweetstream/client.rb, line 527 def invoke_callback(callback, *args) callback.call(*args) if callback end
# File lib/tweetstream/client.rb, line 497 def normalize_filter_parameters(query_parameters = {}) [:follow, :track, :locations].each do |param| if query_parameters[param].kind_of?(Array) query_parameters[param] = query_parameters[param].flatten.collect { |q| q.to_s }.join(',') elsif query_parameters[param] query_parameters[param] = query_parameters[param].to_s end end query_parameters end
# File lib/tweetstream/client.rb, line 565 def warn_if_callbacks(options={}) if OPTION_CALLBACKS.select { |callback| options[callback] }.size > 0 Kernel.warn("Passing callbacks via the options hash is deprecated and will be removed in TweetStream 3.0") end end
# File lib/tweetstream/client.rb, line 531 def yield_message_to(procedure, message) # Give the block the option to receive either one # or two arguments, depending on its arity. if procedure.is_a?(Proc) case procedure.arity when 1 then invoke_callback(procedure, message) when 2 then invoke_callback(procedure, message, self) end end end
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