Created
February 3, 2017 12:46
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Node express application, runing a script and outputting results to browser in realtime
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var cp = require("child_process"); | |
var express = require("express"); | |
var app = express(); | |
var spw = null; | |
var lastTime = new Date(); | |
app.get('/', function(req, res, next) { | |
var time = spw ? 'IN PROGRESS' : lastTime.toString(); | |
res.send('<html>' | |
+ '<header>' | |
+ '<title>Update ASE Project</title>' | |
+ '</header>' | |
+ '<body>' | |
+ '<h3>Last update: ' + time | |
+ '<form action="/update" method="POST">' | |
+ '<button type="submit" id="update">Update</button>' | |
+ '</form>' | |
+ '</body>' | |
+ '</html>'); | |
}); | |
app.post('/update', function(req, res, next){ | |
if (spw) { | |
res.send('Already updating, please wait'); | |
return; | |
} | |
res.writeHead(200, { "Content-Type": "text/event-stream", | |
"Cache-control": "no-cache" }); | |
spw = cp.spawn('./update.sh'), | |
spw.stdout.on('data', function (data) { | |
console.log(data.toString()); | |
res.write(data); | |
}); | |
spw.on('close', function (code) { | |
res.end('Done'); | |
console.log('Done'); | |
spw = null; | |
}); | |
spw.stderr.on('data', function (data) { | |
console.log(data.toString()); | |
res.write(data); | |
}); | |
}); | |
app.use(function(req, res, next) { | |
res.redirect('/'); | |
}); | |
app.listen(4000); | |
console.log('Listening on port 4000'); |
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