In the following path:
app/test/vehicle/
there are several .js file. Is there any way in Javascript where I can get the number of .js file contains in the above-mentioned path?
I am using webStorm environment
Yes, using node:
const fs = require('fs');
const dir = './directory';
fs.readdir(dir, (err, files) => {
console.log(files.length);
});
https://stackoverflow.com/a/43747896/3650835
Since javascript doesn't have local filesystem access when run in the browser, there is no way to access local files from javascript. If you are asking about accessing all files hosted on a cdn or something similar in that directory, there is still no way to tell which requests will return a 20x.
If you are using nodejs, use the fs.readdir function:
const fs = require('fs');
fs.readdir('app/test/vehicle/', (err, files) => {
files.forEach(file => { console.log(file);} );
})
There is no way to access the file system from a web page.
If you are using nodejs, then you can use fs.readdir or fs.readdirSync:
const fs = require('fs');
const dir = './directory';
fs.readdir(dir, (err, files) => {
console.log(files.filter(file => file.endsWith(".js")).length);
});
Where are you trying to get list of the files? On the client side it is impossible. JavaScript does not have access to the client file system. If you are trying to do it in the server side using for example node.js then you can do something like:
var filesys = require('fs');
var files = filesys.readdirSync('/app/test/vehicle/');
Related
Can someone tell me why function below properly download my file from server when i work locally (by localhost) but not download me and return me 500 internal server error when i try do is when i deploy my app on remote server?
async downloadFile(fileId: number): Promise<Buffer> {
const fileName = await this.getFileName(fileId);
const fileBuffer = await new Promise<Buffer>((resolve, reject) => {
fs.readFile(process.cwd() + '/files/' + fileName + '.xlsx', {}, (err, data) => {
if (err) reject(err)
else resolve(data)
});
});
return fileBuffer ;
}
thanks for any help
EDIT, ERROR FROM LOG:
ENOENT: no such file or directory
If you are willing to access your file relatively to your script dir you should use __dirname
Also using the path module in order to build your file location in a platform agnostic way is a good practice.
const path = require('path')
const filePath = path.join(__dirname, 'files', `${fileName}.xlsx`)
process.cwd() refers to you node process working dir. Using it in your context would tie your code to how the entry point has been called. This is bad. Code should not have to be aware of its execution context to work whenever this is possible.
An even better way would be to make your file location configurable (using an environment variable or a config file) and pass your download folder value to your code this way.
see https://12factor.net/config
example
const baseDir = process.env.FILES_PATH || '/some/default/location';
const filePath = path.join(baseDir, 'files', `${fileName}.xlsx`);
then run your program with
FILES_PATH=/your/directory node your_script.js
I want to enter path to the folder in browser and display all file names which located inside, i found that it will possible with node fs, but i also have code which runs at browser, and it need vars, located in file, which will run outside of the browser with node. I need to create server with node and runs all code from it? Or what you can reccomend me to reach this goal? PS: By the way i use webpack
There are differences between javascript in browser end and server end. You can't access the directory directly from the browser. You need some sort of backend technology like PHP, Java, node, python, etc in order to get the file list. You can use node server and below code for the reading directory. Then make a simple HTTP request to your backend server from the frontend.
const path = require('path');
const express = require('express');
const fs = require('fs');
const PORT = 3000;
const app = express();
app.get('/getfiles', async (req, res) => {
const directoryPath = path.join(__dirname, 'Documents');
let data = [];
await fs.readdir(directoryPath, function (err, files) {
//handling error
if (err) {
return console.log('Unable to scan directory: ' + err);
}
//listing all files using forEach
files.forEach(function (file) {
// Do whatever you want to do with the file
data.push(file)
});
});
res.send(data);
});
app.listen(PORT, ()=>{
console.log(`server running on port ${PORT}`);
});
Is it possible to return the contents of a static path to a directory instead of using an .
I want to write a script that reads the contents of a directory on the file system to a given time daily. This is integrated in a webapp I can't edit.
Short answer: you can't.
You need to do this server-side. Here is an answer from a similar question, using node.js.
You can use the fs.readdir or fs.readdirSync methods.
fs.readdir
const testFolder = './tests/';
const fs = require('fs');
fs.readdir(testFolder, (err, files) => {
files.forEach(file => {
console.log(file);
});
});
fs.readdirSync
const testFolder = './tests/';
const fs = require('fs');
fs.readdirSync(testFolder).forEach(file => {
console.log(file);
});
The difference between the two methods, is that the first one is asynchronous, so you have to provide a callback function that will be executed when the read process ends.
The second is synchronous, it will return the file name array, but it will stop any further execution of your code until the read process ends.
Any one here can help me out to rite a code to fetch List of all server files in a directory using Node.js
Just like it is done locally for system file
const testFolder = './models/';
const fs = require('fs');
fs.readdir(testFolder, (err, files) => {
files.forEach(file => {
console.log(file);
});
});
You can try this code to read all files present inside a directory.
fs.readdirSync(`foldername`).forEach(function (file) {
console.log(file);
});
I have an app with some products and each product has a gallery with a different amount of images. Each of the images has a name that is completely random / no correlation with the other image names.
Each of the product images are in /src/assets/images/products/:id/.
I need to add the paths to a gallery component but I can't loop through them because the names are random. Is there any way to just loop through each file from a folder using only Angular? If not can I do it on the back-end without renaming the files? I'm also running the app on a Node.js back-end if that matters.
You can't do that with frontend.
What you need to is using your back-end and return file in it.
You are using NodeJs as back-end so can use the fs.readdir or fs.readdirSync methods.
fs.readdir
const testFolder = './images/';
const fs = require('fs');
fs.readdir(testFolder, (err, files) => {
files.forEach(file => {
console.log(file); // use those file and return it as a REST API
});
})
fs.readdirSync
const testFolder = './images/';
const fs = require('fs');
fs.readdirSync(testFolder).forEach(file => {
console.log(file);
})
Read the full documenation, it may help you to how you can proceed.