Multipart Form Middleware for Deno's Opine Framework.

Provides a simple configurable middleware for the Opine framework that handles file and form uploads. Provides a req.files and req.formData fields to the OpineRequest object. Provides configuration for maximum bytes and options for parsing out files and form data.

Currentl a work in progress and does not promise a stable API.

Simple Example

// Import Opine
import { opine } from 'https://deno.land/x/opine@2.3.3/mod.ts';

// Import Middleware
import multipartFormParser from 'https://github.com/tylerlaceby/multipart/raw/main/opine/mod.ts';

// Define Opine App
const app = opine();

// Define main route with a simple form containg upload input and submit button with action that submit to '/upload' route
app.use('/', (req, res) => {
  res.send(`
      <form action="/upload" method="post" enctype="multipart/form-data">
        <input type="file" name="file" />
        <input type="submit" value="Upload" /> 
      </form>`);
});

// Define upload route to handle upload submit.
app.use('/upload',  multipartFormParser({files: true}),  (req, res) => {
  console.log(req.body)
  res.json(req.parsedBody);
});

// Start server
app.listen(8000);

Parsing File and Form Fields

// Import Opine
import { opine } from 'https://deno.land/x/opine@2.3.3/mod.ts';

// Import Middleware
import multipartFormParser from 'https://github.com/tylerlaceby/multipart/raw/main/opine/mod.ts';

// Define Opine App
const app = opine();

// Define main route with a simple form containg upload input and submit button with action that submit to '/upload' route
app.get('/', (req, res) => {
  res.send(`
      <form action="/upload" method="post" enctype="multipart/form-data">
        <label for="fname">File name</label>
        <input type="text" name="fname" placeholder="File name" /><br><br>
        <input type="file" name="file" />
        <input type="submit" value="Upload" /> 
      </form>`);
});

// Define upload route to handle upload submit.
app.post('/upload',  multipartFormParser({files: true}),  (req, res) => {
  const formData = req.parsedBody?.formData;
  res.json({
      fields: {
        // Read form values using .value('value-field-name')
        // in this example it 'fname' as defined in the form above.
        fileName: formData.value('fname'), 
      }, 
      // Read form file using .file('value-field-name')
      // in this example it 'file' as defined in the form above.
      file: formData.file('file')  
  });
});

// Start server
app.listen(8000);