Created
January 18, 2013 02:24
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logstashServer = 'localhost' | |
, logstashPort = 59595 | |
var app = require('http').createServer(handler) | |
, io = require('socket.io').listen(app) | |
, net = require('net') | |
, logstream = net.connect(logstashPort, logstashServer) | |
, logBuffer = '' | |
, subscribers = [] | |
app.listen(8000) | |
function LogstreamClient(socket, filters) { | |
this.socket = socket | |
this.filters = filters | |
} | |
function handler(req, res) { | |
if (req.url.length > 1) { | |
var filter = req.url.substring(1) | |
var streamHtmlHead = '<html><head><script src="/socket.io/socket.io.js"></script><script>var socket=io.connect("http://' + | |
req.headers.host + '");' | |
var streamHtmlBody = '<body><div id="messages"></body></html>' | |
res.writeHead(200) | |
out = streamHtmlHead + 'socket.emit("subscribe", "' + | |
filter + '"); socket.on("message", function (data) { var div = document.getElementById("messages");' + | |
'div.innerHTML = div.innerHTML + "<p>" + data + "</p>" })</script></head>' + | |
streamHtmlBody | |
} else { | |
out = 'Please specify a query.' | |
} | |
res.end(out) | |
} | |
io.sockets.on('connection', function (socket) { | |
socket.on('subscribe', function(filters) { | |
subscribers.push(new LogstreamClient(socket, filters)) | |
}) | |
}) | |
logstream.on('data', function(data) { | |
line = data.toString() | |
logBuffer = parseBuffer(logBuffer + line) | |
}); | |
function parseBuffer(buf) { | |
if (buf.indexOf("\n") >= 0) { | |
var lines = buf.split("\n") | |
for(var i = 0; i < lines.length; i++) { | |
if (lines[i].indexOf("}", lines[i].length - 1) !== -1) { | |
subscribers.map(function(sub) { | |
regex = new RegExp(sub.filters, 'ig') | |
if (regex.test(lines[i])) { | |
sub.socket.emit('message', lines[i]) | |
} | |
}) | |
} | |
} | |
return lines[lines.length-1] | |
} else { | |
return buf | |
} | |
} |
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