Post Form Data With Axios

In this post, we will give you information about Post Form Data With Axios. Here we will give you detail about Post Form Data With Axios And how to use it also give you a demo for it if it is necessary.

Implementing file uploads is a common backend task. But how do you test file upload endpoints? Don’t worry, Axios makes it easy.

Setup

Suppose your Express server has a /upload endpoint that uses Formidable to
handle form uploads. Below is an example endpoint that just sends the
path of the uploaded file back.

app.post('/upload', function(req, res) {
  const form = new formidable.IncomingForm();
  // Parse 'req' and upload all associated files
  form.parse(req, function(err, fields, files) {
    if (err) {
      return res.status(400).json({ error: err.message });
    }
    const [firstFileName] = Object.keys(files);

    res.json({ filename: firstFileName });
  });
});

In the Browser for Post Form Data With Axios

Modern browsers have a built-in FormData class that you can use to generate HTTP POST bodies formatted in the same way as if you submitted an HTML form. You can then pass the FormData class instance transparently to Axios’ post() function.

// 48x48 PNG of a yin-yang symbol
const base64 = 'data:image/png;base64,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';

run().catch(err => console.log(err));
async function run() {
  const blob = await fetch(base64).then(res => res.blob());

  const formData = new FormData();
  formData.append('yinyang.png', blob);

  // Post the form, just make sure to set the 'Content-Type' header
  const res = await axios.post('//localhost:5001/upload', formData, {
    headers: {
      'Content-Type': 'multipart/form-data'
    }
  });

  // Prints "yinyang.png"
  console.log(res.data);
}

In Node.js for Post Form Data With Axios

Node.js doesn’t have a built-in FormData class, you need to use the form-data npm module.

The form-data npm module also supports Node.js streams.

const FormData = require('form-data');
const axios = require('axios');
const fs = require('fs');
// Post Form Data With Axios
const formData = new FormData();
formData.append('yinyang.png', fs.createReadStream('./yinyang.png'));
const res = await axios.post('http://localhost:3000/upload', formData, {
  // You need to use 'getHeaders()' in Node.js because Axios doesn't
  // automatically set the multipart form boundary in Node.
  headers: formData.getHeaders()
});

Mastering Axios

GET Requests
Get the HTTP Response Body
POST Requests
PUT Requests
DELETE Requests
The then() Function
Error Handling using catch()
Calling Axios as a Function

Framework Features

The create() Function
Axios Interceptors

Integrations

Basic Auth

Axios is a promise-based HTTP client for the browser and node.js. It is a small library that makes it easy to make HTTP requests and get responses. Axios supports all the major browsers and node.js versions.

Here are some of the features of Axios:

Promise-based: Axios uses promises to return the results of HTTP requests. This makes it easy to chain requests and handle errors.
Cross-platform: Axios works in the browser and node.js. This makes it easy to use Axios for both frontend and backend development.
Extensible: Axios is highly extensible. You can use it to make custom HTTP requests and handle custom responses.

The response data will be a JSON object that contains the user’s name, email address, and other information. Axios is a powerful tool that can be used to make HTTP requests in the browser and node.js. It is easy to use and extensible, making it a great choice for a variety of projects.