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javascript read .ini file

I tried searching . How do i do it? I'm create html and i want to read .ini file by javascript on the client Not in the server.
I copy code from javascript parser for a string which contains .ini data
error Uncaught ReferenceError: require is not defined var fs = require('fs')
function parseINIString() {
var fs = require('fs')
var data = fs.readFileSync('C:\\test.ini', 'utf8');
var regex = {
section: /^\s*\[\s*([^\]]*)\s*\]\s*$/,
param: /^\s*([\w\.\-\_]+)\s*=\s*(.*?)\s*$/,
comment: /^\s*;.*$/
};
var value = {};
var lines = data.split(/\r\n|\r|\n/);
var section = null;
alert(lines);
for (x = 0; x < lines.length; x++) {
if (regex.comment.test(lines[x])) {
return;
} else if (regex.param.test(lines[x])) {
var match = lines[x].match(regex.param);
if (section) {
value[section][match[1]] = match[2];
} else {
value[match[1]] = match[2];
}
} else if (regex.section.test(lines[x])) {
var match = lines[x].match(regex.section);
value[match[1]] = {};
section = match[1];
} else if (lines.length == 0 && section) {//changed line to lines to fix bug.
section = null;
};
}
return value;
}

Let's say the javascript running in a browser is so called 'client script'. There are lots of limitation while writing client script, one of them is that it's not allowed to visit the user file on disk. This is to prevent any injected hacker script from reading private data. And the explicit error you see is about the new key word 'require' which is well known as 'commonjs' module which is introduced by Nodejs usually. The 'fs' is one of the internal module of Nodejs as well.
So if you still consist using client script to get the job done, you have to rewrite the script, not 'require' the 'fs' module. And use the file reader to get the content of a file object, which is generated by a file input usually.
A detailed introduction about how to read local files.

How do I write a LZ compressed string to text file using JXA?

I am trying to write a JXA script in Apple Script Editor, that compresses a string using the LZ algorithm and writes it to a text (JSON) file:
var story = "Once upon a time in Silicon Valley..."
var storyC = LZString.compress(story)
var data_to_write = "{\x22test\x22\x20:\x20\x22"+storyC+"\x22}"
app.displayAlert(data_to_write)
var desktopString = app.pathTo("desktop").toString()
var file = `${desktopString}/test.json`
writeTextToFile(data_to_write, file, true)
Everything works, except that the LZ compressed string is just transformed to a set of "?" by the time it reaches the output file, test.json.
It should look like:
{"test" : "㲃냆੠Њޱᐈ攀렒삶퓲ٔ쀛䳂䨀푖㢈Ӱນꀀ"}
Instead it looks like:
{"test" : "????????????????????"}
I have a feeling the conversion is happening in the app.write command used by the writeTextToFile() function (which I pulled from an example in Apple's Mac Automation Scripting Guide):
var app = Application.currentApplication()
app.includeStandardAdditions = true
function writeTextToFile(text, file, overwriteExistingContent) {
try {
// Convert the file to a string
var fileString = file.toString()
// Open the file for writing
var openedFile = app.openForAccess(Path(fileString), { writePermission: true })
// Clear the file if content should be overwritten
if (overwriteExistingContent) {
app.setEof(openedFile, { to: 0 })
}
// Write the new content to the file
app.write(text, { to: openedFile, startingAt: app.getEof(openedFile) })
// Close the file
app.closeAccess(openedFile)
// Return a boolean indicating that writing was successful
return true
}
catch(error) {
try {
// Close the file
app.closeAccess(file)
}
catch(error) {
// Report the error is closing failed
console.log(`Couldn't close file: ${error}`)
}
// Return a boolean indicating that writing was successful
return false
}
}
Is there a substitute command for app.write that maintains the LZ compressed string / a better way to accomplish what I am trying to do?
In addition, I am using the readFile() function (also from the Scripting Guide) to load the LZ string back into the script:
function readFile(file) {
// Convert the file to a string
var fileString = file.toString()
// Read the file and return its contents
return app.read(Path(fileString))
}
But rather than returning:
{"test" : "㲃냆੠Њޱᐈ攀렒삶퓲ٔ쀛䳂䨀푖㢈Ӱນꀀ"}
It is returning:
"{\"test\" : \"㲃냆੠Њޱᐈ攀렒삶퓲ٔ쀛䳂䨀푖㢈Ӱນꀀ\"}"
Does anybody know a fix for this too?
I know that it is possible to use Cocoa in JXA scripts, so maybe the solution lies therein?
I am just getting to grips with JavaScript so I'll admit trying to grasp Objective-C or Swift is way beyond me right now.
I look forward to any solutions and/or pointers that you might be able to provide me. Thanks in advance!

After some further Googl'ing, I came across these two posts:
How can I write UTF-8 files using JavaScript for Mac Automation?
read file as class utf8
I have thus altered my script accordingly.
writeTextToFile() now looks like:
function writeTextToFile(text, file) {
// source: https://stackoverflow.com/a/44293869/11616368
var nsStr = $.NSString.alloc.initWithUTF8String(text)
var nsPath = $(file).stringByStandardizingPath
var successBool = nsStr.writeToFileAtomicallyEncodingError(nsPath, false, $.NSUTF8StringEncoding, null)
if (!successBool) {
throw new Error("function writeFile ERROR:\nWrite to File FAILED for:\n" + file)
}
return successBool
};
While readFile() looks like:
ObjC.import('Foundation')
const readFile = function (path, encoding) {
// source: https://github.com/JXA-Cookbook/JXA-Cookbook/issues/25#issuecomment-271204038
pathString = path.toString()
!encoding && (encoding = $.NSUTF8StringEncoding)
const fm = $.NSFileManager.defaultManager
const data = fm.contentsAtPath(pathString)
const str = $.NSString.alloc.initWithDataEncoding(data, encoding)
return ObjC.unwrap(str)
};
Both use Objective-C to overcome app.write and app.read's inability to handle UTF-8.

JavaScript Spawn: How to pass variable to FLAG in Spawn python script

I have a python script which has two FLAGs --server and --image.
For now, in JavaScript, I can only assign the fixed value to FLAGS using spawn. For example: (This does yield the output)
var pyProg = spawn('python', ['./MLmodel/inception_client.py', '--server=30.220.240.190:9000', '--image=./testImage/DSC00917.JPG']);
pyProg.stdout.on('data', function (data) { console.log('This is result ' + data.toString());});
However, I want to assign a string variable and pass the string to the FLAG. For example: (This is wrong, it does not yield any output)
var imagePath = './testImage/DSC00917.JPG'
var pyProg = spawn('python', ['./MLmodel/inception_client.py', '--server=30.220.240.190:9000', '--image=imagePath']);
pyProg.stdout.on('data', function (data) { console.log('This is result ' + data.toString());});
How should I make it work? Thank you in advance!

You use string concatenation as you would anywhere else in JavaScript.
If you would want console.log to print a variable you would do it like this:
console.log('image path is ' + imagePath);
or if you are using ES6 string interpolation:
console.log(`image path is ${imagePath}`);
The same works for your code example:
var imagePath = './testImage/DSC00917.JPG'
var pyProg = spawn('python', ['./MLmodel/inception_client.py', '--server=30.220.240.190:9000', '--image=' + imagePath]);

python to node.js confusion

So I have this python code that I'm trying to convert to node.js, but I am not sure how.
import urllib.request, re
def getDef(word):
link = "http://www.merriam-webster.com/dictionary/%s" % word
data = urllib.request.urlopen(link).read().decode()
try:
return re.search("<p>: (.*?)</p><p>", data).group(1)
except:
return "No match"
class newDefinition:
def __init__(self, word):
self.definition = getDef(word);
>>> definition = newDefintion("color")
>>> print(definition.definition)
a quality such as red, blue, green, yellow, etc., that you see when you look at something
In node.js however though it I can seem to return it like in python because of it's callback way of doing things, or at least I can't seem to return it which is why I'm asking how would I do the node.js equivalent or is their no equivalent? Here is what I have so far maybe you can spot what I'm doing wrong and how to fix it
var urllib = require("urllib"); // installed with npm
var getDef = function(word){
var link = "http://www.merriam-webster.com/dictionary/" + word;
var urlData = urllib.request(link, {}, function(err, data, res){
var re = new RegExp("<p>: (.*?)</p><p>");
var results = data.toString();
var match = re.exec(results)[1];
return match; // Expected it to give urlData the definition
});
return urlData;
}
var Definition = function(word){
this.definition = getDef(word);
}
definition = new Definition("color");
console.log(definition.definition); // this won't give the definition but the information of the urllib itself rather.
So in general trying to figure out is how to use asynchronous code so I can return things that I need, but I am not use to this concept either so is there an equivalent to this in python? Also if you can point me to some good documentation on asynchronous code that would be great also.

Since return will actually just exit your function instead of returning a value, you need to use a callback. It would look like this:
var urllib = require("urllib");
var getDef = function(word, callback){
var link = 'http://www.merriam-webster.com/dictionary/' + word;
urllib.request(link, {}, function(err, data, res) {
var re = new RegExp('<p>: (.*?)</p><p>');
var results = data.toString();
var match = re.exec(results)[1];
callback(match);
});
};
Then you would pass a callback while calling the function:
getDef('color', function(definition) {
console.log(definition);
});
Edit: Setting an object's property has the same idea. It might look like this instead:
var Definition = function(word) {
var self = this;
getDef(world, function(definition, callback) {
self.definition = definition;
callback.call(self);
});
};
And would be called like so:
var definition = new Definition('color', function() {
console.log(definition.definition);
});

Here is my two cent worth suggestion.
Never ever use regular expressions to parse HTML (Refer here for more details), instead use the XPath like library to parse the document. You can use libraries like cheerio or phantomjs.
Here is a clean solution.
var request = require('request'),
when = require('when'),
cheerio = require('cheerio');
var URL = 'http://www.merriam-webster.com/dictionary/';
/**
* #param word: Word to search the dictionary
* #returns
* Promise object which resolves to array of
* definitions of the word
*/
var getDef = function(word){
var defer = when.defer();
request(URL + word, function(err, res, body){
if (err || res.statusCode !== 200){
defer.reject();
}
var defs = [];
var $ = cheerio.load(body);
$('.wordclick .headword:first-child p').each(function(i,ele){
var definition = $(ele).text();
defs.push(definition);
});
defer.resolve(defs);
});
return defer.promise;
}
getDef('happy').then(function(words){
console.log(words);
});
Note: Here I am using when (a Promise+ library) instead of the Node's standard CPS style.

How can I wrap a precompiled hogan.js template into an AMD module?

I'm trying to incorporate precompiling my Mustache templates into my build process. I'm using AMD for code organization so I'd like to wrap my compiled functions into modules.
I'm trying to do the following:
var fs = require('fs');
fs.readFile('template.html', 'utf-8', function(err, data){
function wrap(fnString){
var pre = 'define(function(){return ';
var post = '});';
return pre + fnString + post;
}
var hogan = require('hogan.js');
var compiledFn = hogan.compile(data, {asString: true});
fs.writeFile('template.js', wrap(compiledFn), function(){console.log('written template module')});
});
When I try to consume the exported function in my application I get an error though:
Uncaught TypeError: Object [object global] has no method 'b'
Am I doing something wrong when compiling the template? Am I doing something wrong when wrapping the function? Does the function need to live in global scope?

So the problem with this was that I misunderstood the way template precompilation works with hogan: It does not output a vanilla JS "function version" of your template but a pre-rendered string that you still need to pass to Hogan.template(str).
Since the stripped down template only version of hogan is only 2.5kb I just included this into my AMD module and got everything working just fine like:
var fs = require('fs');
var Hogan = require('hogan.js');
var output = 'define(function(){\n';
output += 'var Templates = {};\n';
output += fs.readFileSync('template.min.js', 'utf-8') + '\n';
fs.readdir(process.cwd(), function(err, data){
if (err) console.log(err);
data.forEach(function(el){
var s = el.split('.');
if (s[s.length - 1] === 'html'){
var precompiled = Hogan.compile(fs.readFileSync(process.cwd() + + el, 'utf-8'), {asString: true});
output += 'Templates[\'' + el.split('.')[0] + '\'] = new Hogan.Template(' + precompiled + ');\n';
console.log('Compiled template:', el);
}
});
output += 'return Templates;});';
fs.writeFile(process.cwd() + '/templates.js', output, function(){
console.log('Template build succeeded!');
});
});