您可以使用 RESTApi 从服务器下载文件吗

Question

I was wondering if you can call create a GET request on a RESTApi server to download a file. For example if i called a GET request to http://<IP>/storage/download/:filePath/ it would download that file. I am writing the RESTAPi in nodejs.

 const express = require('express'); const router = express.Router(); const fs = require('fs'); const path = require('path'); const root = {} //for this example say filepath = api%2Fstorage%2FImages%2FtestPhoto.png or api/storage/Images/testPhoto.png router.get("/download/:filePath", (req, res, next) => { var filePath = req.params.filePath; filePath = decodeURIComponent(filePath) res.sendFile(filePath); // this is what im questioning. If i use this will it send the file? if so how will i download it on the front end? })

Answer 1

Yes. If the server directory is this

main.js
 └── storage
      └── Image
           └── testPhoto.png

Add this,

router.use('/api/storage', express.static('storage'));

Then request it from frontend. GET /api/storage/Image/testPhoto.png

Answer 2

Express has a helper for this to make life easier.

app.get('/download', function(req, res){
  const file = `${__dirname}/folder/download.csv`;
  res.download(file); // Set disposition and send it.
});