How to read a file being uploaded using koa.js?

by edmond_brakus , in category: Javascript , a month ago

How to read a file being uploaded using koa.js?

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1 answer

by elisha_langworth , a month ago

@edmond_brakus 

To read a file being uploaded using Koa.js, you can use the koa-multer middleware. Here's an example of how you can do this:

  1. First, you need to install the koa-multer package by running the following command:
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npm install koa-multer


  1. Next, you need to set up the multer middleware in your Koa app. Here's an example of how you can do this:
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const Koa = require('koa');
const multer = require('koa-multer');
const app = new Koa();

const upload = multer();

app.use(upload.single('file'));

app.use(async ctx => {
  const file = ctx.req.file;

  // Do something with the file here
  console.log(file);

  ctx.body = 'File uploaded successfully';
});

app.listen(3000, () => {
  console.log('Server running on http://localhost:3000');
});


  1. In the code above, we are setting up the multer middleware and specifying that we expect a single file to be uploaded with the field name file. When a file is uploaded, you can access it in the ctx.req.file object.
  2. Finally, you can test the file upload functionality by sending a POST request with a file attached to it. You can use tools like Postman or curl to test this functionality.


That's it! You can now read a file being uploaded using Koa.js with the help of the koa-multer middleware.