jQueryによるファイルアップロード進捗バー
私は自分のプロジェクトにAJAXファイルアップロード機能を実装しようとしています。これにはjQueryを使用しています。私のコードはAJAXを使用してデータを送信します。ファイルアップロードのプログレスバーも実装したいです。これどうやってするの？アップロードされた割合を計算してプログレスバーを作成できるように、すでにアップロードされた量を計算する方法はありますか？
注：この質問は jQueryフォームプラグイン に関連しています。純粋なjQueryソリューションを探しているなら、 ここから始めてください 。すべてのブラウザに総合的なjQueryソリューションはありません。だからあなたはプラグインを使用する必要があります。私は dropzone.js を使用していますが、これは古いブラウザでは簡単に使用できます。あなたがどのプラグインを好むかはあなたのニーズ次第です。そこに投稿を比較する良いことがたくさんあります。
の例から ：
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>
プログレスバーをCSSでスタイルする必要があります。
私はjQueryだけでこれをやった：
$.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);
}
});
私は自分のプロジェクトで次のものを使用しました。あなたも試すことができます。
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.
これをチェックしてください： http://hayageek.com/docs/jquery-upload-file.php 私はそれをネット上で偶然見つけました。
プロジェクトでjqueryを使用していて、アップロードメカニズムを最初から実装したくない場合は、 https://github.com/blueimp/jQuery-File-Upload を使用できます。
彼らは複数のファイルの選択、ドラッグ＆ドロップのサポート、プログレスバー、検証とプレビュー画像、クロスドメインのサポート、チャンクと再開ファイルのアップロードと非常にいいAPIを持っています。そして彼らは、複数のサーバー言語（node、php、python、go）用のサンプルスクリプトを持っています。
これで私の問題は解決しました
$.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);
}
});
これはより完全に見えるjquery 1.11.x $ .ajax（）の使用法です。
<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>
スタイル：
<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>