1658179680
Como Adicionar Link De Download No Dropzone Com Laravel 8
Com o uso do Dropzone, você pode adicionar facilmente a área de upload de arquivos de arrastar e soltar. Ele exibe uma miniatura após o upload do arquivo, mas não exibe um link para download.
Neste tutorial, mostro como você pode adicionar o link do arquivo de download no contêiner Dropzone depois que o arquivo for carregado com sucesso no Laravel 8.
1. Baixar
- Baixe a biblioteca Dropzone aqui
- Extraia o arquivo baixado no
public/diretório.
2. Controlador
- Criar
PageControllercontrolador.
php artisan make:controller PageController- Abrir
app/Http/Controllers/PageController.phparquivo. - Crie dois métodos –
- index – Carregar
indexvisualização. - uploadFile – Este método é usado para fazer upload do arquivo selecionado do Dropzone.
- index – Carregar
Defina a validação do arquivo. Eu defino o tamanho máximo do arquivo para 2 MB (2048 Kb).
Se o arquivo não for validado, atribua 0 a $data['success'] e a resposta de validação a $data['error'].
Se o arquivo for validado com sucesso, carregue o arquivo para o "files"local. Armazene o caminho do arquivo carregado na $filepathvariável.
Atribuir 1a $data['success'], $filepatha $data['link']e atribuir Uploaded Successfully!a $data['message'].
Matriz de retorno $datano formato JSON.
Código concluído
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;
class PageController extends Controller {
public function index(){
return view('index');
}
public function uploadFile(Request $request){
$data = array();
$validator = Validator::make($request->all(), [
'file' => 'required|mimes:png,jpg,jpeg,pdf|max:2048'
]);
if ($validator->fails()) {
$data['success'] = 0;
$data['error'] = $validator->errors()->first('file');// Error response
}else{
if($request->file('file')) {
$file = $request->file('file');
$filename = time().'_'.$file->getClientOriginalName();
// File upload location
$location = 'files';
// Upload file
$file->move($location,$filename);
// File path
$filepath = url($location.'/'.$filename);
// Response
$data['success'] = 1;
$data['link'] = $filepath;
$data['message'] = 'Uploaded Successfully!';
}else{
// Response
$data['success'] = 0;
$data['message'] = 'File not uploaded.';
}
}
return response()->json($data);
}
}3. Rota
- Abrir
routes/web.phparquivo. - Defina 2 rotas –
use App\Http\Controllers\PageController;
Route::get('/', [PageController::class, 'index']);
Route::post('/uploadFile', [PageController::class, 'uploadFile'])->name('uploadFile');- A segunda rota é usada para upload de arquivos Dropzone.
4. Visualizar
Criar index.blade.php arquivo na resources/views/ pasta.
Armazene o token CSRF na <meta >tag e inclua a biblioteca Dropzone.
Contêiner Dropzone
- Crie um
<form action="{{route('uploadFile')}}" class='dropzone' >.
Roteiro
- Leia o token CSRF da
<meta >tag e atribua àCSRF_TOKENvariável. - Desative o autoDiscover do dropzone –
Dropzone.autoDiscover = falsee inicialize o Dropzone no formato<form >. - Defina o tamanho máximo do arquivo de upload para 2 MB e extensões de arquivo válidas – “.jpeg,.jpg,.png,.pdf”.
- Envie o token CSRF usando o
sendingevento –formData.append("_token", CSRF_TOKEN);. - Usando
successa resposta de retorno de verificação de evento e adicione o link de download. - Se
response.status == 0então exibir a mensagem de erro usandoalert()o contrário, exiba o link de download criando uma marca de âncora e definahrefcomoresponse.link.
Código concluído
<!DOCTYPE html>
<html>
<head>
<title>How to Add Download link in Dropzone - Laravel 8</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('uploadFile')}}" 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: 2, // 2 mb
acceptedFiles: ".jpeg,.jpg,.png,.pdf",
});
myDropzone.on("sending", function(file, xhr, formData) {
formData.append("_token", CSRF_TOKEN);
});
myDropzone.on("success", function(file, response) {
if(response.success == 0){ // Error
alert(response.error);
}else{
// Download link
var anchorEl = document.createElement('a');
anchorEl.setAttribute('href',response.link);
anchorEl.setAttribute('target','_blank');
anchorEl.innerHTML = "<br>Download";
file.previewTemplate.appendChild(anchorEl);
}
});
</script>
</body>
</html>5. Saída
6. Conclusão
Eu adicionei um link de download usando o elemento âncora quando o arquivo foi carregado com sucesso. Caminho do arquivo retornado com status de upload do controlador.
Fonte: https://makitweb.com
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