Barre de progression de téléchargement de fichier avec jQuery
J'essaie d'implémenter une fonctionnalité de téléchargement de fichier AJAX dans mon projet. J'utilise jQuery pour cela; mon code envoie les données en utilisant AJAX. Je souhaite également implémenter une barre de progression de téléchargement de fichier. Comment puis-je faire ceci? Existe-t-il un moyen de calculer combien a déjà été téléchargé afin que je puisse calculer le pourcentage téléchargé et créer une barre de progression?
Remarque: Cette question concerne le plugin de formulaire jQuery . Si vous recherchez une solution pure jQuery, commencez ici . Il n’existe pas de solution globale jQuery pour tous les navigateurs. Donc, vous devez utiliser un plugin. J'utilise dropzone.js , qui offre un repli facile pour les navigateurs plus anciens. Le plugin que vous préférez dépend de vos besoins. Il y a beaucoup de bons articles de comparaison.
Parmi les exemples :
jQuery:
$(function() {
var bar = $('.bar');
var percent = $('.percent');
var status = $('#status');
$('form').ajaxForm({
beforeSend: function() {
status.empty();
var percentVal = '0%';
bar.width(percentVal);
percent.html(percentVal);
},
uploadProgress: function(event, position, total, percentComplete) {
var percentVal = percentComplete + '%';
bar.width(percentVal);
percent.html(percentVal);
},
complete: function(xhr) {
status.html(xhr.responseText);
}
});
});
html:
<form action="file-echo2.php" method="post" enctype="multipart/form-data">
<input type="file" name="myfile"><br>
<input type="submit" value="Upload File to Server">
</form>
<div class="progress">
<div class="bar"></div >
<div class="percent">0%</div >
</div>
<div id="status"></div>
vous devez dénommer la barre de progression avec css ...
Je l'ai fait avec jQuery uniquement:
$.ajax({
xhr: function() {
var xhr = new window.XMLHttpRequest();
xhr.upload.addEventListener("progress", function(evt) {
if (evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
percentComplete = parseInt(percentComplete * 100);
console.log(percentComplete);
if (percentComplete === 100) {
}
}
}, false);
return xhr;
},
url: posturlfile,
type: "POST",
data: JSON.stringify(fileuploaddata),
contentType: "application/json",
dataType: "json",
success: function(result) {
console.log(result);
}
});
J'ai utilisé les éléments suivants dans mon projet. vous pouvez essayer aussi.
ajax = new XMLHttpRequest();
ajax.onreadystatechange = function () {
if (ajax.status) {
if (ajax.status == 200 && (ajax.readyState == 4)){
//To do tasks if any, when upload is completed
}
}
}
ajax.upload.addEventListener("progress", function (event) {
var percent = (event.loaded / event.total) * 100;
//**percent** variable can be used for modifying the length of your progress bar.
console.log(percent);
});
ajax.open("POST", 'your file upload link', true);
ajax.send(formData);
//ajax.send is for uploading form data.
vérifiez ceci: http://hayageek.com/docs/jquery-upload-file.php Je l'ai trouvé par hasard sur le net.
Si vous utilisez jQuery sur votre projet et que vous ne souhaitez pas implémenter le mécanisme de téléchargement à partir de rien, vous pouvez utiliser https://github.com/blueimp/jQuery-File-Upload .
Ils ont une très belle API avec une sélection de fichiers multiples, une prise en charge du glisser-déposer, une barre de progression, des images de validation et de prévisualisation, une prise en charge interdomaine, des téléchargements de fichiers fragmentés et récupérables. Et ils ont des exemples de scripts pour plusieurs langages de serveur (noeud, php, python et aller).
URL de démonstration: https://blueimp.github.io/jQuery-File-Upload/ .
Cela a résolu mon problème
$.ajax({
xhr: function() {
var xhr = new window.XMLHttpRequest();
xhr.upload.addEventListener("progress", function(evt) {
if (evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
percentComplete = parseInt(percentComplete * 100);
var $link = $('.'+ids);
var $img = $link.find('i');
$link.html('Uploading..('+percentComplete+'%)');
$link.append($img);
}
}, false);
return xhr;
},
url: posturlfile,
type: "POST",
data: JSON.stringify(fileuploaddata),
contentType: "application/json",
dataType: "json",
success: function(result) {
console.log(result);
}
});
voici une utilisation plus complète de jquery 1.11.x $ .ajax ():
<script type="text/javascript">
function uploadProgressHandler(event)
{
$("#loaded_n_total").html("Uploaded "+event.loaded+" bytes of "+event.total);
var percent = (event.loaded / event.total) * 100;
var progress = Math.round(percent);
$("#uploadProgressBar").html(progress + " percent na ang progress");
$("#uploadProgressBar").css("width", progress + "%");
$("#status").html(progress +"% uploaded... please wait");
}
function loadHandler(event)
{
$("#status").html(event.target.responseText);
$("#uploadProgressBar").css("width", "0%");
}
function errorHandler(event){
$("#status").html("Upload Failed");
}
function abortHandler(event){
$("#status").html("Upload Aborted");
}
$("#uploadFile").click(function(event)
{
event.preventDefault();
var file = $("#fileUpload")[0].files[0];
var formData = new FormData();
formData.append("file1", file);
$.ajax({url: 'http://testarea.local/UploadWithProgressBar1/file_upload_parser.php',
method: 'POST',
type: 'POST',
data: formData,
contentType: false,
processData: false,
xhr: function()
{
var xhr = new window.XMLHttpRequest();
xhr.upload.addEventListener("progress",
uploadProgressHandler,
false
);
xhr.addEventListener("load", loadHandler, false);
xhr.addEventListener("error", errorHandler, false);
xhr.addEventListener("abort", abortHandler, false);
return xhr;
}
}
);
}
);
</script>
JavaScript:
<script>
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</script>
<script type="text/javascript">
$(document).ready(function () {
$('#myform').on('change', '.wpcf7-file', function (e) {
e.preventDefault();
var myParent = $(this).parent();
var filname= $('input[type=file]').val()
if (filname) {
$(this).parent().find('#progress-div').show();
$('#myform').ajaxSubmit({
// target: '#progress-div123',/**********only for response************/
beforeSubmit: function () {
myParent.find('#progress-bar').width('0%');
},
uploadProgress: function (event, position, total, percentComplete) {
myParent.find('#progress-bar').width(percentComplete + '%');
myParent.find('#progress-bar').html('<div id="progress-status">' + percentComplete + ' %</div>')
},
success: function showResponse(responseText, statusText, xhr, $form) {
//myParent.find('#progress-div').hide(10000);
},
resetForm: false
});
}
return false;
});
/***********Error msg if file not valid***************/
$('input[type=file]').change(function () {
var val = $(this).val().toLowerCase();
var regex = new RegExp("(.*?)\.(pdf|txt|jpg|png|doc|docx|xlx|xls|xlsx|jpg|ppt|pptx|tif|tiff|\n\
bmp|pcd|gif|bmp|Zip|rar|odt|avi|ogg|m4a|mov|mp3|mp4|mpg|wav|wmv|stp|sldprt|sldasm|iges|igs|stl|x_t|step\n\
|stp|prt|asm|idw|iam|ipt|dxf|dwg|pdf|slddrw|dwf)$");
if (!(regex.test(val))) {
$(this).val('');
alert('Please select correct file format');
}
});
/*********End*****************/
});
</script>
Modes:
<style>
body{width:610px;}
#uploadForm {border-top:#F0F0F0 2px solid;background:#FAF8F8;padding:10px;}
#uploadForm label {margin:2px; font-size:1em; font-weight:bold;}
.demoInputBox{padding:5px; border:#F0F0F0 1px solid; border-radius:4px; background-color:#FFF;}
#progress-bar {background-color: #12CC1A;height:20px;color: #FFFFFF;width:0%;-webkit-transition: width .3s;-moz-transition: width .3s;transition: width .3s;}
.btnSubmit{background-color:#09f;border:0;padding:10px 40px;color:#FFF;border:#F0F0F0 1px solid; border-radius:4px;}
#progress-div
{
border: 1px solid #0fa015;
border-radius: 4px;
margin: -35px 2px 7px 295px;
padding: 5px 0;
text-align: center;
width: 277px;
}
#targetLayer{width:100%;text-align:center;}
</style>