How can I open an Image file using fs in NodeJS?

Question

In my current codes, it does only can read a text file, How can I make an Image (base64) file opened with Photos Application (Windows)? Is there any chance to do that? If it's impossible, please let me know!

const fs = require('fs')

fs.readFile('./Test/a.txt', 'utf8' , (err, data) => {
    if (err) {
      console.error(err)
      return
    }
    console.log(data)
    return
})

Alexander Mills · Accepted Answer · 2022-09-06 23:37:01Z

2

Another possible solution is like this:

const cp = require('child_process');

const imageFilePath = '/aaa/bbb/ccc'

const c = cp.spawn('a_program_that_opens_images', [ `"${imageFilePath}"` ]);  


c.stdout.pipe(process.stdout);  
c.stderr.pipe(process.stderr);


c.once('exit', exitCode => { 

   // child process has exited

});

edited Sep 6, 2022 at 23:37

answered Jan 31, 2022 at 7:00

Alexander Mills

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3 Comments

Stawa Over a year ago

It doesn't work well on mine, It gives me an output something like this:

throw er; // Unhandled 'error' event, errno: -4058, code: 'ENOENT', syscall: 'spawn program_that_opens_images', path: 'program_that_opens_images', spawnargs: [ 'C:/Users/MyUser/Desktop/MYFolder/Test/MyPic.png' ]

Alexander Mills Over a year ago

Because "program_that_opens_images" is not a real program - put the right path to the program there

Alexander Mills Over a year ago

Figure it out? Happy to provide more input

Alexander Mills · Accepted Answer · 2022-01-31 06:53:00Z

0

Do something like this:

const cp = require('child_process');
const c = cp.spawn('bash');  // 1

const imageFilePath = '/aaa/bbb/ccc'

c.stdin.end(` 
   program_that_opens_images "${imageFilePath}"
`);  // 2

c.stdout.pipe(process.stdout);  // 3
c.stderr.pipe(process.stderr);

c.once('exit', exitCode => {    // 4
   // child process has exited

});

what it does:

spawns a bash child process (use sh or zsh instead if you want)
writes to bash stdin, (inputting the command to run)
pipes the stdio from the child to the parent
captures the exit code from the child

answered Jan 31, 2022 at 6:53

Alexander Mills

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1 Comment

Alexander Mills Over a year ago

note on windows, you may wish to use my other answer

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