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Add options parameter and allow setting of extra response headers #22

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Add options parameter and allow setting of extra response headers #22

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35 changes: 29 additions & 6 deletions lib/sseclient.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,25 @@ var util = require('util'),

module.exports = SSEClient;

function SSEClient(req, res) {
/**
* @param {http.ClientRequest} req
* @param {http.ServerResponse} res
* @param {Object} options
* @param {Object} options.headers: Extra headers to add to the SSE response.
* The defaults are: {
* 'Content-Type': 'text/event-stream',
* 'Cache-Control': 'no-cache',
* 'Connection': 'keep-alive'
* }
* Anything passed in options.headers will be merged over the defaults.
*
* @constructor
*/
function SSEClient(req, res, options) {
this.req = req;
this.res = res;
this.options = options || {};

var self = this;
res.on('close', function() {
self.emit('close');
Expand All @@ -14,13 +30,20 @@ function SSEClient(req, res) {

util.inherits(SSEClient, events.EventEmitter);


SSEClient.prototype.initialize = function() {
this.req.socket.setNoDelay(true);
this.res.writeHead(200, {
'Content-Type': 'text/event-stream',
'Cache-Control': 'no-cache',
'Connection': 'keep-alive'
});

// Merge extra headers with default ones.
var headers = Object.assign({
'Content-Type': 'text/event-stream',
'Cache-Control': 'no-cache',
'Connection': 'keep-alive'
},
this.options.headers
);

this.res.writeHead(200, headers);
this.res.write(':ok\n\n');
};

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