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Execute a node script with from inside a file

Strange question, but currently I have a script that I run from the terminal which requires a parameter. Normally I will run this by doing node script.js param, but now I want to run this script with the parameter from inside a JS file when the Express server loads.
The parameter is taken in and defined in the file like this:
var param = process.argv[process.argv.length - 1];
What is the best practice for making this file accessible elsewhere in my Node app and running it?

If I understand you correctly following should work.
script.js
module.exports = function (params) {
console.log(params);
}
main.js
var param = process.argv[process.argv.length - 1];
require('./script')(param);

If you need to get param from another source when the script is required you can make a verification if the script is running directly from command line or it was required:
if (require.main === module) {
var param = process.argv[process.argv.length - 1];
} else {
var param = // get from other source.
}

Execute an external .js file using selenium webdriver

How can we execute an external .js file using selenium webdriver file using java selenium. I got some reference "Call external javascript functions from java code", however invoke function is able to accept the function inside that file. I want to just execute the whole file as a whole.

It's as simple as this to run an external JavaScript from your server upon the client:
// Assume Guava, but whatever you use to load files...
String externalJS = Files.toString( new File("external.js"), Charset.forName("utf-8"));
// Execute, assume no arguments, and no value to return
Object ignore = ((JavascriptExecutor) driver).executeScript(externalJS);
The link you provided isn't useful, because it's about executing JavaScript upon the server (within the Java VM) rather than upon the browser/device client.
If rather than executing, you're interested in injecting JavaScript into the page for other scripts etc. to interact with (i.e. rather than a one-off execution), see this question.

Here is the code for nodeJS calling external JS and executing a function within the JS:
var fs = require('fs');
var webdriver = require('selenium-webdriver'),
By = webdriver.By,
until = webdriver.until;
var driver = new webdriver.Builder()
.forBrowser('phantomjs')
.build();
var axeSource = fs.readFileSync('lib/axe.js', 'utf8');
driver
.get('http://www.google.com/ncr')
driver.executeScript(axeSource)
.then(function(){
driver.switchTo().defaultContent();
driver.executeAsyncScript(function() {
var callback = arguments[arguments.length - 1];
window.axe.a11yCheck(document, null, function (results) {
callback(results);
});
}).then(function(str) {
var viola = processResults(str);
console.log(viola);
});
})
driver.quit();

Call Perl script from Thunderbird Javascript

I wrote a perl script that handles some data automatically. However, I face a problem when I try to call the script from my thunderbird extension that is naturally written in javascript.
var file = Components.classes["#mozilla.org/file/local;1"]
.createInstance(Components.interfaces.nsILocalFile);
file.initWithPath("/usr/bin/perl");
// create an nsIProcess
var process = Components.classes["#mozilla.org/process/util;1"]
.createInstance(Components.interfaces.nsIProcess);
process.init(file);
// Run the process.
// If first param is true, calling thread will be blocked until
// called process terminates.
// Params are used to pass command-line arguments
// to the process
var args = ["package/myperlscript.pl", "some arguments];
process.run(true, args, args.length);
I guess I have the perl script placed at the wrong location. I tried various ones, but I could not get it work. If that is my major mistake, where is the base path that the javascript file expects?

Send user input from NodeJS to shell script

I have this NodeJS script:
var util = require('util'),
process = require('child_process'),
ls = process.exec('test.sh');
ls.stdout.on('data', function (data) {
console.log(data.toString());
ls.stdin.write('Test');
});
and this shell script:
#!/bin/bash
echo "Please input your name:";
read name;
echo "Your name is $name";
I tried to run the NodeJS script and it stucked at "Please input your name:". Does anyone know how to send an input from NodeJS script to the shell script ?
Thanks

You will have to say something like this:
ls.stdin.write('test\n');
OR
you can inherit standard streams if you want input from user using spawn.
like this:
var spawn = require('child_process').spawn;
spawn('sh',['test.sh'], { stdio: 'inherit' });

Did you try adding '\n' to the end of your input (e.g. ls.stdin.write('Test\n');) to simulate pressing return/enter?
Also, you want process.spawn, not process.exec. The latter does not have a streaming interface like you are using, but it instead executes the command and buffers stdout and stderr output (passing it to the callback given to process.exec()).

Run Bash Script with Node from client request

I need to make a server-side script run when a user from the browser clicks a button...
I've been researching for a while, and can't figure it out.
What we have:
Node.js server (on localhost) running on Fedora Red Hat
NO PHP
Most pages are html + javascript + jQuery
To be more clear, here is what we'd like to happen:
-->User goes to http:// localhost /index.html
-->User selects colors, pushes "submit" button.
-->Selected colors go to the bash script (on the server) ./sendColors [listOfColors]
-->The bash script does it's thing.
================
Things I've tried
child_process.spawn
I WISH I could do this on the html page:
var spawn = require('child_process').spawn;
ls = spawn(commandLine, [listOfColors]);
ls.stdout.on('data', function (data) {
console.log('stdout: ' + data);
});
ls.stderr.on('data', function (data) {
console.log('stderr: ' + data);
});
ls.on('close', function (code) {
console.log('child process exited with code ' + code);
});
but this script is server-side, not client-side, so I can't run it on the html page (I believe). The error I get when I try to run this is that require is undefined.
browserify
I've tried installinst browserify, but the machine we are using isn't connected to the internet, and cannot use npm install. I've manually copied over the files to usr/lib and "required" it fine, but then it said that it couldn't find require "through", which is in browserify's index.js...
getRuntime
tried this thing:
var bash_exit_code = 0; // global to provide exit code from bash shell invocation
function bash(command)
{
var c; // a character of the shell's stdout stream
var retval = ""; // the return value is the stdout of the shell
var rt = Runtime.getRuntime(); // get current runTime object
var shell = rt.exec("bash -c '" + command + "'"); // start the shell
var shellIn = shell.getInputStream(); // this captures the output from the command
while ((c = shellIn.read()) != -1) // loop to capture shell's stdout
{
retval += String.fromCharCode(c); // one character at a time
}
bash_exit_code = shell.waitFor(); // wait for the shell to finish and get the return code
shellIn.close(); // close the shell's output stream
return retval;
}
said it didn't know what Runtime was
RequireJS
I've looked into RequireJS, but didn't understand how to use it in my case
eval
I've tried eval also... but I think that's for algebric expressions... didn't work.
ActiveX
even tried activeX:
variable=new ActiveXObject(...
said it didn't know what ActiveXObject is
================
Currently what I'm trying
HttpServer.js:
var http = require('http');
...
var colors = require('./colorsRequest.js').Request;
...
http.get('http://localhost/colorsRequest', function(req, res){
// run your request.js script
// when index.html makes the ajax call to www.yoursite.com/request, this runs
// you can also require your request.js as a module (above) and call on that:
res.send(colors.getList()); // try res.json() if getList() returns an object or array
console.log("Got response ");// + res.statusCode);
});
colorsRequest.js
var RequestClass = function() {
console.log("HELLO");
};
// now expose with module.exports:
exports.Request = RequestClass;
index.html
...
var colorsList = ...
...
$.get('http://localhost/colorsRequest', function(colors) {
$('#response').html(colorsList); // show the list
});
I'm getting
GET http://localhost/colorsRequest 404 (Not Found)
Anyone got any ideas?

Here's a simple boilerplate for the server (which uses Express, so you might need to install that first: npm install express):
var spawn = require('child_process').spawn;
var express = require('express');
var app = express();
app.use(express.static(__dirname));
app.get('/colorsRequest', function(req, res) {
var command = spawn(__dirname + '/run.sh', [ req.query.color || '' ]);
var output = [];
command.stdout.on('data', function(chunk) {
output.push(chunk);
});
command.on('close', function(code) {
if (code === 0)
res.send(Buffer.concat(output));
else
res.send(500); // when the script fails, generate a Server Error HTTP response
});
});
app.listen(3000);
You can pass it a color, and it will run the shellscript run.sh (of which it assumes is located in the same directory as the server JS file) with the color passed as argument:
curl -i localhost:3000/colorsRequest?color=green
# this runs './run.sh green' on the server
Here's a boilerplate HTML page (save it as index.html, put it in the same directory as the server code and the shell script, start the server, and open http://localhost:3000 in your browser):
<!doctype html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>
<body>
<select>
<optgroup label="Pick a color:">
<option>green</option>
<option>blue</option>
<option>yellow</option>
<option>orange</option>
</optgroup>
</select>
<script>
$('select').on('change', function() {
$.get('/colorsRequest', { color : $(this).val() });
});
</script>
</body>
</html>

You are on the right way with your first approach, the child_process.spawn variant. Ofcourse you can't put this in the HTML page, as it is then executed in the browser, not in the server, but you can easily create a request in the browser (AJAX or page load, depending on what you need), that triggers running this script in the server.