How return file from service?

[ruslan-gennadievich]

Hi
I need Link to download some file. This link is 'get' method in service. I'm try some hacks in service file:

file.service.js

const { File } = require('./file.class');
const hooks = require('./file.hooks');

module.exports = function (app) {
  const options = {};  
  
  // declare this before your services
  app.use(app.get('apiPrefix') + '/files', (req, res, next) => {
    // anything you put on 'req.feathers' will later be on 'data'
    req.feathers.req = req
    req.feathers.res = res
    next()
  })  

  app.use(app.get('apiPrefix') + '/files', new File(options, app));

  const service = app.service(app.get('apiPrefix') + '/files');
  service.hooks(hooks);
};

file.class.js

const fs = require('fs')
const path = require('path')
const FMANAGERDIR = './public/'
exports.File = class Files {
    async get(file, params) {
        try {
            let currentDirPath = FMANAGERDIR
            const res = params.res // define res objecti on service
            console.log('!!!', currentDirPath + '/' + file) // path to file is correct!
            const fileStream = fs.createReadStream(currentDirPath + '/' + file)
            res.header('Content-Disposition', `attachment; filename="${path.basename(file)}"`)
            res.header('Content-Type', 'application/octet-stream')
            return fileStream.pipe(res) //maybe it wrong
        } catch (error) {
            return error
        }
    }
};

But this not working, What is true way for resolve this task?

[daffl]

This would be done in a custom service middleware:

file.service.js

const { File } = require('./file.class');
const hooks = require('./file.hooks');

module.exports = function (app) {
  const options = {};  
  
  app.use(app.get('apiPrefix') + '/files', new File(options, app), (req, res, next) => {
    const result = res.data
    const fileStream = fs.createReadStream(result.file)

    res.header('Content-Disposition', `attachment; filename="${path.basename(file)}"`)
    res.header('Content-Type', 'application/octet-stream')
    
    fileStream.pipe(res)
  });

  const service = app.service(app.get('apiPrefix') + '/files');
  service.hooks(hooks);
};

file.class.js

const fs = require('fs')
const path = require('path')
const FMANAGERDIR = './public/'
exports.File = class Files {
    async get(file, params) {
      const currentDirPath = FMANAGERDIR

      return {
        file: currentDirPath + '/' + file
      }
    }
};

[ruslan-gennadievich]

What about v4 branch?

[daffl]

This works the same for v4.

[codyng]

How to do that in v5 now?

[daffl]

You would set ctx.body = fileStream in a Koa service middleware