Drag and Drop file upload using Dropzone in Laravel 7

Dropzone is easier to add on the page.

It allows either uploads the file by drag & drop or file browse. It displays file preview after upload.

In Laravel, need to also pass the CSRF token for uploading the files.

In this tutorial, I show how you can upload a file using dropzone in Laravel.

1. Download

  • Download Dropzone library from here
  • Extract the downloaded files in public/ directory.

2. Route

  • Open routes/web.php file.
  • Define 2 routes –
Route::get('/','[email protected]');
Route::post('/users/fileupload/','[email protected]')->name('users.fileupload');
  • The 2nd route is used for Dropzone file upload.

3. Controller

  • Create UsersController Controller.
php artisan make:controller UsersController
  • Open app/Http/Controllers/UsersController.php file.
  • Import Carbon\Carbon.
  • Create two methods –
    • index – Load users.index view.
    • fileupload – This method is used to upload the selected file of Dropzone.

Assign upload location to $destinationPath variable. Create a directory if not exists.

Get the file extension and initialize valid file extension in $validextensions Array.

Check the file extension is exists in $validextension Array. If exists then rename the file and upload it.

Completed Code

<?php namespace App\Http\Controllers; use Illuminate\Http\Request; class UsersController extends Controller { public function index(){ return view('users.index'); } /* File upload */ public function fileupload(Request $request){ if($request->hasFile('file')) { // Upload path $destinationPath = 'files/'; // Create directory if not exists if (!file_exists($destinationPath)) { mkdir($destinationPath, 0755, true); } // Get file extension $extension = $request->file('file')->getClientOriginalExtension(); // Valid extensions $validextensions = array("jpeg","jpg","png","pdf"); // Check extension if(in_array(strtolower($extension), $validextensions)){ // Rename file $fileName = $request->file('file')->getClientOriginalName().time() .'.' . $extension; // Uploading file to given path $request->file('file')->move($destinationPath, $fileName); } } }

4. View

Create file –

  • Create a new directory users at resources/views/ directory.
  • In resources/views/users/ directory create a new index.blade.php file.

Include CSS and JS –

  • Specify csrf_token() in the <meta >.
  • Include Dropzone CSS and JS files at the <head > section.

Dropzone container –

  • Create <form class='dropzone' >. Pass {{route('users.fileupload')}} in action attribute.

Script –

  • Read CSRF token from <meta > tag and assign in CSRF_TOKEN variable.
  • Disable dropzone auto-discovery by assigning false – Dropzone.autoDiscover = false;.
  • Initialize dropzone on class='dropzone'. Set max upload file size to 3 MB and upload file extensions – jpeg, jpg, png, and pdf.
  • Use dropzone 'sending' event to pass CSRF_TOKEN with formData – formData.append("_token", CSRF_TOKEN).

Completed Code

<!DOCTYPE html>
<html> <head> <title>Drag and Drop file upload with Dropzone in Laravel</title> <!-- Meta --> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta charset="utf-8"> <meta name="csrf-token" content="{{ csrf_token() }}"> <!-- CSS --> <link rel="stylesheet" type="text/css" href="{{asset('dropzone/dist/min/dropzone.min.css')}}"> <!-- JS --> <script src="{{asset('dropzone/dist/min/dropzone.min.js')}}" type="text/javascript"></script> </head> <body> <div class='content'> <!-- Dropzone --> <form action="{{route('users.fileupload')}}" class='dropzone' > </form> </div> <!-- Script --> <script> var CSRF_TOKEN = document.querySelector('meta[name="csrf-token"]').getAttribute("content"); Dropzone.autoDiscover = false; var myDropzone = new Dropzone(".dropzone",{ maxFilesize: 3, // 3 mb acceptedFiles: ".jpeg,.jpg,.png,.pdf", }); myDropzone.on("sending", function(file, xhr, formData) { formData.append("_token", CSRF_TOKEN); }); </script> </body>

5. Output

6. Conclusion

You need to pass the CSRF token to upload the file using Dropzone. For this require to explicitly initialize dropzone and pass the token.

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