How do I use NodeJS on Windows? I've downloaded and installed the 0.6.1 MSI.
I can run node in the command prompt.
What do I do next? I can't seem to find much information such as where to put files etc
It's just for a little experimentation.
Thanks
Ric
Have you followed the basic tutorial exactly as it is posted? If you create a file (let's say, index.js) that looks like this...
var http = require('http');
http.createServer(function(req, res) {
res.writeHead(204, { 'Content-Type':'text/plain'});
res.write('Hello World');
res.end();
}).listen(8080);
...and then launch it via the command line like so (assumes index.js is visible from the current directory)...
node index.js
...you should see Hello World in your browser when you point it to http://localhost:8080.
If you simply run node then you will get an interactive javascript shell, which is not what you want.
Make sure you called listen(port) and also make sure that you called res.end() in order to send the response.
I was being an idiot. I was running node at c: then typing the full path to the file within Node! If any one has the same problem then make sure you change to the folder your js files are in first, then node filename.js
Related
I have a Laravel project and as you know when you deploy your app everything in your public directory should be copied over to your htdocs or public_html directory to hide your application's code.
I am using webpack to build my react code and everything else and each time I change my javascript webpack does what I want, it sees I make a change and then it builds it.
However I want to add one additional command after it builds and that is to copy everything from the public directory into the correct directory in htdocs/public_html.
So far I read up on this question here Run command after webpack build
It works and I can get the echo to work but I'm not sure why cp isn't working. Echo works but how do I know what shell commands I can use?
I tried 'cp' and even 'copy-item' which is powershell, but none are working.
This is my plugin so far, I figured I needed to change the directory to be safe
before copying anything over but again, nothing is working.
mix.webpackConfig(webpack => {
return {
plugins: [
new WebpackShellPlugin({
onBuildStart: ['echo "Starting Build ..."'],
onBuildEnd: ["cd 'E:\\xammp\\apps\\FactorioCalculator'",
"cp '.\\public\\*' '..\\..\\htdocs\\FactorioCalculator\\' -f -r"]
})
]
};
});
You could always use the copyDirectory mix method. Just put something like the following at the bottom of your webpack.mix.js file:
mix.copyDirectory('public', '../../htdocs/FactorioCalculator/')
You might have to change your path to ..\\..\\htdocs\\FactorioCalculator\\ as per the path in your question (I only have my mac with me so I'm unable to test on my other machine).
To answer you original question, if you want to execute a command each time webpack finishes building you can use the mix.then() which takes a closure.
I am using webpack and electron and while I can reference my script files fine locally (app/scripts/scriptname.sh), when it comes to the production deploy, I get an error: Can't open app/components/scripts/scriptname.sh.
It's unclear to me if this is an electron-dependent issue or a webpack-issue.
I am running these using node child_process as:
var ls = spawn('sh', ['app/components/scripts/scriptname.sh']);
I don't necessarily need the scripts to be in their own folder it would just be helpful.
You need to provide the complete absolute path to the script. To do that you can use the app.getAppPath() API of electron
app.getAppPath()
Returns String - The current application directory.
So your code would be something like:
var scriptAbsolutePath = app.getAppPath() + '/app/components/scripts/scriptname.sh';
var ls = spawn('sh', [scriptAbsolutePath]);
You can also have a look at app.getPath(name) API if it satisfies your particular requirement.
I'm just learning d3, and I'm attempting to import data from a CSV file, but I keep getting the error "XMLHttpRequest cannot load file:///Users/Laura/Desktop/SampleECG.csv. Cross origin requests are only supported for HTTP. ". I've searched for how to fix this error and have ran it on a local web server, but I haven't found a solution that works for d3.v2.js. Here's a sample of the code:
var Time = []
ECG1 = []
d3.csv("/Desktop/d3Project/Sample.csv", function(data)
{
Time = data.map(function(d) {return [+d["Time"]];});
ECG1 = data.map(function(d) {return [+d["ECG1"]];});
console.log(Time)
console.log(ECG1)
});
Any help will be much appreciated.
This confused me too (I am also a d3 beginner).
So, for some reason, web browsers are not happy about you loading local data, probably for security reasons or something. Anyways, to get around this, you have to run a local web server. This is easy.
In your terminal, after cd-ing to your website's document root (thanks #daixtr), type:
python -m SimpleHTTPServer 8888 &
Okay, now as long as that terminal window is open and running, your local 8888 web server will be running.
So in my case, originally the web page I was working on was called
file://localhost/Users/hills/Desktop/website/visualizing-us-bls-data-inflation-and-prices.html
When I opened it in chrome. To open up my page on my local web server, I just typed (into the chrome search bar):
http://localhost:8888/Desktop/website/visualizing-us-bls-data-inflation-and-prices.html
Now, reading in CSVs should work. Weird, I know.
To those using built-in python webserver and who are still experiencing issues, do REMEMBER and make sure that you run the "python -m SimpleHTTPServer 8888" invocation at the correct path of which you consider to be your DocumentRoot. That is, you cannot just run 'python -m SimpleHTTPServer 8888' anywhere. You have to actually 'cd /to/correct/path/' containing your index.html or data.tsv and then from there run 'python -m SimpleHTTPServer 8888'.
Also, just learning D3 for school work. I was trying to run this simple D3 example:
https://gist.github.com/d3noob/b3ff6ae1c120eea654b5
I had the same problem as OP re: loading data using Chrome browser. I bet the great solution Hillary Sanders posted above was re: Python 2.X.
My answer is re: Python 3.X [OS: Ubuntu 16x]:
Open a terminal window within the root directory of your project, then run:
python3 -m http.server
It will serve HTTP on port 8000 by default unless it is already taken, in that case to open another port, e.g. 7800, run:
python3 -m http.server 7800
Then, on your Chrome browser address bar type:
localhost:8000
The above worked for me because I only had an index.html page in my root folder. In case, you have a HTML page with a different name, type the whole path to that local HTML page and it should work also. And, you should be able to see the graph created from the data set in my link (that must be in a folder like data/data.csv). I hope this helps. :-)
Use Firefox, idk what Chrome tries to accomplish
I develop Firefox extension with bundled executable file which should be run on browser startup.
To run process I need get nsIFile or nsILocalFile instance which points to executable file.
I know one solution how to get it using directory service:
var file = Components.classes["#mozilla.org/file/directory_service;1"].getService(Components.interfaces.nsIProperties).get("ProfD", Components.interfaces.nsIFile);
file.append("extensions");
file.append("<extension id>");
file.append("<relative path>");
But this solution has two disadvantages:
It doesn't work in development mode, when instead of installed extension I have only text file with real extension path
I'm not sure that it will work on all Firefox configurations because of hardcoded "extensions" part of the path
So is there any nicer way to run executable file which comes with Firefox extension?
Thanks.
You are making way too many assumptions about the directory structure of the Firefox profile - don't. The Add-on Manager API lets you get the path of a file inside the extension, you should use it:
Components.utils.import("resource://gre/modules/AddonManager.jsm");
AddonManager.getAddonByID("<extension id>", function(addon)
{
var uri = addon.getResourceURI("<relative path>");
var file = uri.QueryInterface(Components.interfaces.nsIFileURL).file;
...
});
A restartless addon's startup function (in the bootstrap.js file) will receive, as its first parameter, the path where the addon is installed. You can then play various tricks to read files inside the .jar file, if any: see https://github.com/protz/GMail-Conversation-View/blob/master/bootstrap.js#L55 as an example.
In a non-restartless case, I must confess I don't have much of an idea :).
I found this thread looking for a way to reference a path to an image hosted in extension's directory from a content script. Here's a solution:
Include your files in web_accessible_resources in the extension's manifest.
"web_accessible_resources": [
"images/*"
]
Absolute paths to these resources contain randomly generated UUID, therefore we're using runtime.getUrl() giving it the path relative to manifest.json. Example:
let myImg = document.createElement('img');
myImg.src = browser.runtime.getURL("images/my-img.png")
I have a ~\Cakefile that looks like this:
task 'say:hello', 'Howdy!', (options) ->
console.log 'Hello, world!'
But running cake (which resolves to C:\Users\bstraub\AppData\Roaming\npm\cake.cmd since it was installed with npm) gives this error:
Error: Cakefile not found in C:\Users\bstraub
The file exists. What am I doing wrong?
path.exists and path.existsSync were broken for Windows in node 0.6.9. Updating to 0.6.13 corrects this, and cake works.
Check if the file is really called Cakefile and not CakeFile or something.
Check if ~\Cakefile maps to C:\Users\bstraub\Cakefile.
The ~ might map to some other dir, depending on your system config
(e.g., with cygwin, git-bash, or a funny corporate env var setup).
Check if cd ~ really brings you to C:\Users\bstraub