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browser.js
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browser.js
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var Stream = require('stream');
var sockjs = require('sockjs-client');
var resolve = require('url').resolve;
var parse = require('url').parse;
module.exports = function (u, cb) {
var uri = parse(u).protocol ? u : resolve(window.location.href, u);
var stream = new Stream;
stream.readable = true;
stream.writable = true;
var ready = false;
var buffer = [];
var sock = sockjs(uri);
stream.sock = sock;
stream.write = function (msg) {
if (!ready || buffer.length) buffer.push(msg)
else sock.send(msg)
};
stream.end = function (msg) {
if (msg !== undefined) stream.write(msg);
if (!ready) {
stream._ended = true;
return;
}
stream.writable = false;
sock.close();
};
stream.destroy = function () {
stream._ended = true;
stream.writable = stream.readable = false;
buffer.length = 0
sock.close();
};
sock.onopen = function () {
if (typeof cb === 'function') cb();
ready = true;
for (var i = 0; i < buffer.length; i++) {
sock.send(buffer[i]);
}
buffer = [];
stream.emit('connect');
if (stream._ended) stream.end();
};
sock.onmessage = function (e) {
stream.emit('data', e.data);
};
sock.onclose = function () {
stream.emit('end');
stream.writable = false;
stream.readable = false;
};
return stream;
};