Link to a similar problem that has no answers, but written in C
I'm using NodeJS to parse output from ark-server-tools, which is a layer on top of SteamCMD. What I'd like to do is parse the progress of the update and assign it to a variable, which I'll return as a GET call that the client can use to check progress of the update.
I put the log results of an update into a file to run my code against, which I've put in a PasteBin for brevity.
update.js
app.get('/update', function(req, res) {
var toReturn;
var outputSoFar;
var total;
var startPos;
var endPos = 0;
//var proc = spawn('arkmanager', ['update', '--safe']);
var proc = spawn('./update-log.sh'); //for testing purposes
proc.stdout.on('data', function(data){
outputSoFar += data.toString();
//if server is already updated
if (outputSoFar.indexOf('Your server is already up to date!') !== -1) {
toReturn = 'Server is already up-to-date.';
}
//find update progress
if (outputSoFar.indexOf('progress:') !== -1) {
for(var line in outputSoFar.split('\n')){
console.log('found progress');
startPos = outputSoFar[line].indexOf('progress:', endPos) + 10; //get the value right after progress:_, which should be a number
endPos = outputSoFar[line].indexOf(' (', startPos); // find the end of this value, which is signified by space + (
console.log(outputSoFar[line].substring(startPos, endPos).trim());
updatePercent = outputSoFar[line].substring(startPos, endPos).trim(); //returned to the `checkUpdateProgress` endpoint
}
toReturn = 'Updating...';
}
});
proc.stderr.on('data', function(data){
console.log(data);
});
proc.on('close', function (code, signal) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.write(JSON.stringify(toReturn));
res.end();
});
}
/*
* Returns progress of an update
*/
app.get('/updateProgress', function(req, res){
console.log('updatePercent: ' + updatePercent);
res.send(JSON.stringify(updatePercent));
});
Couple questions:
1) Is this the best way to architect my RESTful API? One call for the action of updating and another for checking the progress of the update?
2) I'd love a better way to test the function, as echoing the console log returns the data in one piece, as opposed to a data stream. How do I do this?
3) I'm pretty sure the parsing function itself isn't quite right, but I'm having a hard time testing it because of #2.
If you want to take a look at the project in its entirety, here's the repo. Thanks in advance for your help!
