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XHR streaming example
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<p>Hello | |
<script> | |
var xhr = new XMLHttpRequest(); | |
xhr.open('GET', '/stream'); | |
xhr.seenBytes = 0; | |
xhr.onreadystatechange = function() { | |
console.log("state change.. state: "+ xhr.readyState); | |
if(xhr.readyState == 3) { | |
var newData = xhr.response.substr(xhr.seenBytes); | |
console.log("newData: <<" +newData+ ">>"); | |
document.body.innerHTML += "New data: <<" +newData+ ">><br />"; | |
xhr.seenBytes = xhr.responseText.length; | |
console.log("seenBytes: " +xhr.seenBytes); | |
} | |
}; | |
xhr.addEventListener("error", function(e) { | |
console.log("error: " +e); | |
}); | |
console.log(xhr); | |
xhr.send(); | |
</script> |
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require 'goliath' | |
class Server < Goliath::API | |
def response(env) | |
case env['REQUEST_PATH'] | |
when /index/ then | |
[200, {}, IO.read('index.html')] | |
when /stream/ then | |
EM.add_periodic_timer(3) do | |
env.stream_send("data event! ... ") | |
end | |
headers = {'Content-Type' => 'application/x-javascript'} | |
[200, headers, Goliath::Response::STREAMING] | |
end | |
end | |
end |
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