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Python-Runner module #142

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Python-Runner module #142

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17a84f8
add python-runner functions 'run', and 'writeFiles'
amragaey Aug 14, 2016
b2d8118
add executeScript and killScript functions
amragaey Aug 15, 2016
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88 changes: 88 additions & 0 deletions src/python_runner.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,88 @@
var pythonRunner = function(path, folder, fileName, code, stdin)
{
this.path=path;
this.folder=folder;
this.fileName=fileName;
this.code = code;
this.stdin=stdin;
}

pythonRunner.prototype.run = function(callback)
{
var myRunner = this;

myRunner.writeFiles( function(){
myRunner.executeScript(callback);
});
}

pythonRunner.prototype.writeFiles = function(callback)
{
var myRunner = this;

var exec = require('child_process').exec;
var fs = require('fs');

console.log("mkdir "+ myRunner.path + myRunner.folder);
exec("mkdir "+ myRunner.path + myRunner.folder + "&& chmod 777 "+ myRunner.path + myRunner.folder, function(st)
{
fs.writeFile(myRunner.path + myRunner.folder + "/" + myRunner.fileName, myRunner.code,function(err) {
console.log(myRunner.path + myRunner.folder + "/" + myRunner.fileName);
if (err) {
console.log(err);
}
else {
console.log("Python file saved!");

fs.writeFile(myRunner.path + myRunner.folder + "/inputFile", myRunner.stdin,function(err) {
console.log(myRunner.path + myRunner.folder + "/inputFile");
if (err) {
console.log(err);
}
else {
console.log("Input file saved!");
callback();
}
});
}
});

});
}

pythonRunner.prototype.executeScript = function(callback)
{
var myRunner = this;

var exec = require('child_process').exec;
var fs = require('fs');

//execute ppython script -> write stdout or stderr to output.text
//return output.text contents in callback
c = exec("python " + myRunner.path + myRunner.folder + "/" + myRunner.fileName + " -< " + myRunner.path + myRunner.folder + "/inputFile " + "2>&1 | tee -a " + myRunner.path + myRunner.folder + "/output.text", function(st){
fs.readFile(myRunner.path + myRunner.folder + '/output.text', 'utf8', function(err, data){
if (!data) {
console.log= "error reading output file";
}
else {
callback(data);
}
});
});

console.log(c.pid);
}

pythonRunner.prototype.killScript = function(callback)
{
var myRunner = this;
var exec = require('child_process').exec;

//remove temporary folder and kill python process
exec("rm -rf "+ myRunner.path + myRunner.folder, function(st){
c.kill();
callback("process terminated");
});
}

module.exports = pythonRunner;