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socket.stream.js
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socket.stream.js
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var zmq = require('..')
, http = require('http')
, should = require('should')
, semver = require('semver');
describe('socket.stream', function(){
//since its for libzmq4+, we target versions > 4.0.0
var version = semver.lte(zmq.version, '4.0.0');
it('should support a streaming socket', function (done){
if (!version) {
done();
return console.warn('stream socket type in libzmq v4+');
}
var stream = zmq.socket('stream');
stream.on('message', function (id,msg){
msg.should.be.an.instanceof(Buffer);
var raw_header = String(msg).split('\r\n');
var method = raw_header[0].split(' ')[0];
method.should.equal('GET');
//due to HTTP GET method, prepare HTTP response for TCP socket
var httpProtocolString = 'HTTP/1.0 200 OK\r\n' //status code
+ 'Content-Type: text/html\r\n' //headers
+ '\r\n'
+ '<!DOCTYPE html>' //response body
+ '<head>' //make it xml, json, html or something else
+ '<meta charset="UTF-8">'
+ '</head>'
+ '<body>'
+'<p>derpin over protocols</p>'
+ '</body>'
+'</html>'
//zmq streaming prefixed by envelope's routing identifier
stream.send([id,httpProtocolString]);
});
var addr = '127.0.0.1:47080';
stream.bind('tcp://'+addr, function(){
//send non-peer request to zmq, like an http GET method with URI path
http.get('http://'+addr+'/aRandomRequestPath', function (httpMsg){
//it's a readable stream as the good lord intended
httpMsg.socket._readableState.reading.should.be.true
//conventional node streams emit data events to process zmq stream response
httpMsg.on('data',function (msg){
msg.should.be.an.instanceof(Buffer);
String(msg).should.equal('<!DOCTYPE html><head><meta charset="UTF-8"></head>'
+'<body>'
+'<p>derpin over protocols</p>'
+'</body>'
+'</html>');
done();
});
});
});
});
});