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POEventMachine and Twitter streaming API
 

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    <p>I am running an EventMachine process using the Twitter streaming API. I always have an issue if the content of the stream is not frequently.</p> <p>Here is the minimal version of the script:</p> <pre><code>require 'rubygems' require 'eventmachine' require 'em-http' require 'json' usage = "#{$0} &lt;user&gt; &lt;password&gt; &lt;track&gt;" abort usage unless user = ARGV.shift abort usage unless password = ARGV.shift abort usage unless keywords= ARGV.shift def startIt(user,password,keywords) EventMachine.run do http = EventMachine::HttpRequest.new("https://stream.twitter.com/1/statuses/filter.json",{:port=&gt;443}).post( :head =&gt;{ 'Authorization' =&gt; [ user, password ] } , :body =&gt;{"track"=&gt;keywords}, :keepalive=&gt;true, :timeout=&gt;-1) buffer = "" http.stream do |chunk| buffer += chunk while line = buffer.slice!(/.+\r?\n/) if line.length&gt;5 tweet=JSON.parse(line) puts Time.new.to_s+"#{tweet['user']['screen_name']}: #{tweet['text']}" end end end http.errback { puts Time.new.to_s+"Error: " puts http.error } end rescue =&gt; error puts "error rescue "+error.to_s end while true startIt user,password,keywords end </code></pre> <p>If I search for a keyword like "iphone", everything works well If I search for a less frequently used keyword, my stream keeps to be closed very rapidely , around 20 sec after the last message. Note: that http.error is always empty, so it's very hard to understand while the stream is closed... On the other end, the nerly similar php version is not closed, so seems probably in issue with eventmachine/http-em but I dont' understand which one... </p>
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    1. COAny idea of how you could dynamically add/remove keywords in this example?
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    2. CO@tibbon as far as I know, the only way to add/remove keyword is to stop the stream. To do it without loosing any tweet, the best way is to handle several stream. For instance, opening a second stream with the new parameters (and a different twitter account) and once opened, closing the first one. But be careful of possible duplication during the small period where both stream are opened, especially in case of high volume
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