Javascript jqueryajax文件上传
我可以使用以下jQuery代码使用ajax请求的POST方法执行文件上传吗Javascript jqueryajax文件上传,javascript,jquery,ajax,post,file-upload,Javascript,Jquery,Ajax,Post,File Upload,我可以使用以下jQuery代码使用ajax请求的POST方法执行文件上传吗 $.ajax({ type: "POST", timeout: 50000, url: url, data: dataString, success: function (data) { alert('success'); return false; } }); 如果可能，我是否需要填写数据部分？这是正确的方法吗？我只将文件发布到服务器端
$.ajax({
type: "POST",
timeout: 50000,
url: url,
data: dataString,
success: function (data) {
alert('success');
return false;
}
});
数据您可以使用
IFrame您可以查看更多详细信息
更新 XHR2支持通过AJAX上传文件。例如，通过对象，但不幸的是，所有/旧浏览器都不支持它
FormData- IE 10+
- 火狐4.0+
- 铬7+
- 狩猎5+
- 歌剧12+
- 使用隐藏的iframe并将表单的目标设置为该iframe的名称。这样，在提交表单时，只刷新iframe
- 为iframe的load事件注册事件处理程序以解析响应
XMLHttpRequest（）有关详细信息，请参阅：问题的答案。通过ajax上传文件不再需要iFrame。我最近自己做的。查看以下页面： 更新了答案并将其清理干净。使用getSize函数检查大小，或使用getType函数检查类型。 添加了progressbar html和css代码
var Upload = function (file) {
this.file = file;
};
Upload.prototype.getType = function() {
return this.file.type;
};
Upload.prototype.getSize = function() {
return this.file.size;
};
Upload.prototype.getName = function() {
return this.file.name;
};
Upload.prototype.doUpload = function () {
var that = this;
var formData = new FormData();
// add assoc key values, this will be posts values
formData.append("file", this.file, this.getName());
formData.append("upload_file", true);
$.ajax({
type: "POST",
url: "script",
xhr: function () {
var myXhr = $.ajaxSettings.xhr();
if (myXhr.upload) {
myXhr.upload.addEventListener('progress', that.progressHandling, false);
}
return myXhr;
},
success: function (data) {
// your callback here
},
error: function (error) {
// handle error
},
async: true,
data: formData,
cache: false,
contentType: false,
processData: false,
timeout: 60000
});
};
Upload.prototype.progressHandling = function (event) {
var percent = 0;
var position = event.loaded || event.position;
var total = event.total;
var progress_bar_id = "#progress-wrp";
if (event.lengthComputable) {
percent = Math.ceil(position / total * 100);
}
// update progressbars classes so it fits your code
$(progress_bar_id + " .progress-bar").css("width", +percent + "%");
$(progress_bar_id + " .status").text(percent + "%");
};
//Change id to your id
$("#ingredient_file").on("change", function (e) {
var file = $(this)[0].files[0];
var upload = new Upload(file);
// maby check size or type here with upload.getSize() and upload.getType()
// execute upload
upload.doUpload();
});
<div id="progress-wrp">
<div class="progress-bar"></div>
<div class="status">0%</div>
</div>
如果您想这样做：
$.upload( form.action, new FormData( myForm))
.progress( function( progressEvent, upload) {
if( progressEvent.lengthComputable) {
var percent = Math.round( progressEvent.loaded * 100 / progressEvent.total) + '%';
if( upload) {
console.log( percent + ' uploaded');
} else {
console.log( percent + ' downloaded');
}
}
})
.done( function() {
console.log( 'Finished upload');
});
$("#submit_car").click(function() {
var formData = new FormData($('#car_cost_form')[0]);
$.ajax({
url: 'car_costs.php',
data: formData,
contentType: false,
processData: false,
cache: false,
type: 'POST',
success: function(data) {
// ...
},
});
});
您可以简单地使用它通过Ajax上传文件。。。。。。提交输入不能在表单元素之外：）我想到了一个主意：
Have an iframe on page and have a referencer.
Form: A processing page AND a target of the FRAME.
data:image/png;base64,asdfasdfasdfasdfa
.aftersubmit(function(){
stopPropagation(); // or some other code which would prevent a refresh.
});
data:image/png;base64,asdfasdfasdfasdfa
.aftersubmit(function(){
stopPropagation(); // or some other code which would prevent a refresh.
});
您可以使用方法ajaxSubmit，如下所示：） 选择需要上载到服务器的文件时，表单必须提交到服务器：）
我已经很晚了，但是我正在寻找一个基于ajax的图像上传解决方案，我想要的答案在这篇文章中有点分散。我确定的解决方案涉及FormData对象。我组装了一个基本形式的代码。您可以看到，它演示了如何使用fd.append（）将自定义字段添加到表单中，以及在ajax请求完成时如何处理响应数据 上载html：
<!DOCTYPE html>
<html>
<head>
<title>Image Upload Form</title>
<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script type="text/javascript">
function submitForm() {
console.log("submit event");
var fd = new FormData(document.getElementById("fileinfo"));
fd.append("label", "WEBUPLOAD");
$.ajax({
url: "upload.php",
type: "POST",
data: fd,
processData: false, // tell jQuery not to process the data
contentType: false // tell jQuery not to set contentType
}).done(function( data ) {
console.log("PHP Output:");
console.log( data );
});
return false;
}
</script>
</head>
<body>
<form method="post" id="fileinfo" name="fileinfo" onsubmit="return submitForm();">
<label>Select a file:</label><br>
<input type="file" name="file" required />
<input type="submit" value="Upload" />
</form>
<div id="output"></div>
</body>
</html>
图片上传表格
函数submitForm（）{
控制台日志（“提交事件”）；
var fd=新表单数据（document.getElementById（“fileinfo”）；
附加（“标签”、“网络上传”）；
$.ajax({
url:“upload.php”，
类型：“POST”，
数据：fd，
processData:false，//告诉jQuery不要处理数据
contentType:false//告诉jQuery不要设置contentType
}).完成（功能（数据）{
log（“PHP输出：”）；
控制台日志（数据）；
});
返回false；
}
选择一个文件：
<?php
if ($_POST["label"]) {
$label = $_POST["label"];
}
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/jpg")
|| ($_FILES["file"]["type"] == "image/pjpeg")
|| ($_FILES["file"]["type"] == "image/x-png")
|| ($_FILES["file"]["type"] == "image/png"))
&& ($_FILES["file"]["size"] < 200000)
&& in_array($extension, $allowedExts)) {
if ($_FILES["file"]["error"] > 0) {
echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
} else {
$filename = $label.$_FILES["file"]["name"];
echo "Upload: " . $_FILES["file"]["name"] . "<br>";
echo "Type: " . $_FILES["file"]["type"] . "<br>";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>";
if (file_exists("uploads/" . $filename)) {
echo $filename . " already exists. ";
} else {
move_uploaded_file($_FILES["file"]["tmp_name"],
"uploads/" . $filename);
echo "Stored in: " . "uploads/" . $filename;
}
}
} else {
echo "Invalid file";
}
?>
可以使用Ajax发布和上载文件。我正在使用
jQuery$.ajaxvar formData = new FormData();
formData.append('file', $('#file')[0].files[0]);
$.ajax({
url : 'upload.php',
type : 'POST',
data : formData,
processData: false, // tell jQuery not to process the data
contentType: false, // tell jQuery not to set contentType
success : function(data) {
console.log(data);
alert(data);
}
});
$（“#yourForm”）.serialize（））//print_r($_FILES);
$fileName = $_FILES['file']['name'];
$fileType = $_FILES['file']['type'];
$fileError = $_FILES['file']['error'];
$fileContent = file_get_contents($_FILES['file']['tmp_name']);
if($fileError == UPLOAD_ERR_OK){
//Processes your file here
}else{
switch($fileError){
case UPLOAD_ERR_INI_SIZE:
$message = 'Error al intentar subir un archivo que excede el tamaño permitido.';
break;
case UPLOAD_ERR_FORM_SIZE:
$message = 'Error al intentar subir un archivo que excede el tamaño permitido.';
break;
case UPLOAD_ERR_PARTIAL:
$message = 'Error: no terminó la acción de subir el archivo.';
break;
case UPLOAD_ERR_NO_FILE:
$message = 'Error: ningún archivo fue subido.';
break;
case UPLOAD_ERR_NO_TMP_DIR:
$message = 'Error: servidor no configurado para carga de archivos.';
break;
case UPLOAD_ERR_CANT_WRITE:
$message= 'Error: posible falla al grabar el archivo.';
break;
case UPLOAD_ERR_EXTENSION:
$message = 'Error: carga de archivo no completada.';
break;
default: $message = 'Error: carga de archivo no completada.';
break;
}
echo json_encode(array(
'error' => true,
'message' => $message
));
}
可以，只需使用javascript获取文件，确保将文件作为数据URL读取。解析base64之前的内容以实际获取base64编码的数据，然后如果您使用php或任何后端语言，您可以解码base64数据并保存到如下所示的文件中
Javascript:
var reader = new FileReader();
reader.onloadend = function ()
{
dataToBeSent = reader.result.split("base64,")[1];
$.post(url, {data:dataToBeSent});
}
reader.readAsDataURL(this.files[0]);
PHP:
file_put_contents('my.pdf', base64_decode($_POST["data"]));
当然，您可能会想做一些验证，比如检查您正在处理的文件类型之类的事情，但这就是想法 我已经实现了一个多文件选择功能，在通过ajax从预览中删除不需要的文件后，可以进行即时预览和上传 详细文档可在此处找到： 演示： jsFiddle： Javascript:
$(document).ready(function(){
$('form').submit(function(ev){
$('.overlay').show();
$(window).scrollTop(0);
return upload_images_selected(ev, ev.target);
})
})
function add_new_file_uploader(addBtn) {
var currentRow = $(addBtn).parent().parent();
var newRow = $(currentRow).clone();
$(newRow).find('.previewImage, .imagePreviewTable').hide();
$(newRow).find('.removeButton').show();
$(newRow).find('table.imagePreviewTable').find('tr').remove();
$(newRow).find('input.multipleImageFileInput').val('');
$(addBtn).parent().parent().parent().append(newRow);
}
function remove_file_uploader(removeBtn) {
$(removeBtn).parent().parent().remove();
}
function show_image_preview(file_selector) {
//files selected using current file selector
var files = file_selector.files;
//Container of image previews
var imageContainer = $(file_selector).next('table.imagePreviewTable');
//Number of images selected
var number_of_images = files.length;
//Build image preview row
var imagePreviewRow = $('<tr class="imagePreviewRow_0"><td valign=top style="width: 510px;"></td>' +
'<td valign=top><input type="button" value="X" title="Remove Image" class="removeImageButton" imageIndex="0" onclick="remove_selected_image(this)" /></td>' +
'</tr> ');
//Add image preview row
$(imageContainer).html(imagePreviewRow);
if (number_of_images > 1) {
for (var i =1; i<number_of_images; i++) {
/**
*Generate class name of the respective image container appending index of selected images,
*sothat we can match images selected and the one which is previewed
*/
var newImagePreviewRow = $(imagePreviewRow).clone().removeClass('imagePreviewRow_0').addClass('imagePreviewRow_'+i);
$(newImagePreviewRow).find('input[type="button"]').attr('imageIndex', i);
$(imageContainer).append(newImagePreviewRow);
}
}
for (var i = 0; i < files.length; i++) {
var file = files[i];
/**
* Allow only images
*/
var imageType = /image.*/;
if (!file.type.match(imageType)) {
continue;
}
/**
* Create an image dom object dynamically
*/
var img = document.createElement("img");
/**
* Get preview area of the image
*/
var preview = $(imageContainer).find('tr.imagePreviewRow_'+i).find('td:first');
/**
* Append preview of selected image to the corresponding container
*/
preview.append(img);
/**
* Set style of appended preview(Can be done via css also)
*/
preview.find('img').addClass('previewImage').css({'max-width': '500px', 'max-height': '500px'});
/**
* Initialize file reader
*/
var reader = new FileReader();
/**
* Onload event of file reader assign target image to the preview
*/
reader.onload = (function(aImg) { return function(e) { aImg.src = e.target.result; }; })(img);
/**
* Initiate read
*/
reader.readAsDataURL(file);
}
/**
* Show preview
*/
$(imageContainer).show();
}
function remove_selected_image(close_button)
{
/**
* Remove this image from preview
*/
var imageIndex = $(close_button).attr('imageindex');
$(close_button).parents('.imagePreviewRow_' + imageIndex).remove();
}
function upload_images_selected(event, formObj)
{
event.preventDefault();
//Get number of images
var imageCount = $('.previewImage').length;
//Get all multi select inputs
var fileInputs = document.querySelectorAll('.multipleImageFileInput');
//Url where the image is to be uploaded
var url= "/upload-directory/";
//Get number of inputs
var number_of_inputs = $(fileInputs).length;
var inputCount = 0;
//Iterate through each file selector input
$(fileInputs).each(function(index, input){
fileList = input.files;
// Create a new FormData object.
var formData = new FormData();
//Extra parameters can be added to the form data object
formData.append('bulk_upload', '1');
formData.append('username', $('input[name="username"]').val());
//Iterate throug each images selected by each file selector and find if the image is present in the preview
for (var i = 0; i < fileList.length; i++) {
if ($(input).next('.imagePreviewTable').find('.imagePreviewRow_'+i).length != 0) {
var file = fileList[i];
// Check the file type.
if (!file.type.match('image.*')) {
continue;
}
// Add the file to the request.
formData.append('image_uploader_multiple[' +(inputCount++)+ ']', file, file.name);
}
}
// Set up the request.
var xhr = new XMLHttpRequest();
xhr.open('POST', url, true);
xhr.onload = function () {
if (xhr.status === 200) {
var jsonResponse = JSON.parse(xhr.responseText);
if (jsonResponse.status == 1) {
$(jsonResponse.file_info).each(function(){
//Iterate through response and find data corresponding to each file uploaded
var uploaded_file_name = this.original;
var saved_file_name = this.target;
var file_name_input = '<input type="hidden" class="image_name" name="image_names[]" value="' +saved_file_name+ '" />';
file_info_container.append(file_name_input);
imageCount--;
})
//Decrement count of inputs to find all images selected by all multi select are uploaded
number_of_inputs--;
if(number_of_inputs == 0) {
//All images selected by each file selector is uploaded
//Do necessary acteion post upload
$('.overlay').hide();
}
} else {
if (typeof jsonResponse.error_field_name != 'undefined') {
//Do appropriate error action
} else {
alert(jsonResponse.message);
}
$('.overlay').hide();
event.preventDefault();
return false;
}
} else {
/*alert('Something went wrong!');*/
$('.overlay').hide();
event.preventDefault();
}
};
xhr.send(formData);
})
return false;
}
$（文档）.ready（函数（）{
$（'form'）。提交（函数（ev）{
$（'.overlay'）.show（）；
$（窗口）.scrollTop（0）；
返回所选的上传图像（ev，ev.target）；
})
})
函数添加新文件上传器（addBtn）{
var currentRow=$（addBtn.parent（）.parent（）；
var newRow=$（currentRow.clone（）；
$（newRow）.find（'.previewImage.imagePreviewTable'）.hide（）；
$（newRow.find（'.removeButton'）.show（）；
$（newRow）.find（'table.imagePreviewTable'）.find（'tr'）.remove（）；
$（newRow.find（'input.multipleImageFileInput'）.val（“”）；
$（addBtn.parent（）.parent（）.parent（）.append（newRow）；
}
函数remove_file_uploader（removeBtn）{
$（removeBtn.parent（）.parent（）.remove（）；
}
功能显示图像预览（文件选择器）{
//使用当前文件选择器选择的文件
var files=file_selector.files；
//图像预览容器
var imageContainer=$（文件选择器）.next（'table.imagePreviewTable'）；
//选择的图像数
v
$("#formContent").submit(function(e){
e.preventDefault();
var formdata = new FormData(this);
$.ajax({
url: "ajax_upload_image.php",
type: "POST",
data: formdata,
mimeTypes:"multipart/form-data",
contentType: false,
cache: false,
processData: false,
success: function(){
alert("file successfully submitted");
},error: function(){
alert("okey");
}
});
});
});
$(document).ready(function() {
var options = {
beforeSubmit: showRequest,
success: showResponse,
dataType: 'json'
};
$('body').delegate('#image','change', function(){
$('#upload').ajaxForm(options).submit();
});
});
function showRequest(formData, jqForm, options) {
$("#validation-errors").hide().empty();
$("#output").css('display','none');
return true;
}
function showResponse(response, statusText, xhr, $form) {
if(response.success == false)
{
var arr = response.errors;
$.each(arr, function(index, value)
{
if (value.length != 0)
{
$("#validation-errors").append('<div class="alert alert-error"><strong>'+ value +'</strong><div>');
}
});
$("#validation-errors").show();
} else {
$("#output").html("<img src='"+response.file+"' />");
$("#output").css('display','block');
}
}
<form class="form-horizontal" id="upload" enctype="multipart/form-data" method="post" action="upload/image'" autocomplete="off">
<input type="file" name="image" id="image" />
</form>
var formData = new FormData();
formData.append("userfile", fileInputElement.files[0]);
data.append("myfile", myBlob, "filename.txt");
var url = "YOUR_URL";
var form = $('#YOUR_FORM_ID')[0];
var formData = new FormData(form);
$.ajax(url, {
method: 'post',
processData: false,
contentType: false,
data: formData
}).done(function(data){
if (data.success){
alert("Files uploaded");
} else {
alert("Error while uploading the files");
}
}).fail(function(data){
console.log(data);
alert("Error while uploading the files");
});
<html>
<head>
<title>Ajax file upload</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function (e) {
$("#uploadimage").on('submit', (function(e) {
e.preventDefault();
$.ajax({
url: "upload.php", // Url to which the request is send
type: "POST", // Type of request to be send, called as method
data: new FormData(this), // Data sent to server, a set of key/value pairs (i.e. form fields and values)
contentType: false, // The content type used when sending data to the server.
cache: false, // To unable request pages to be cached
processData:false, // To send DOMDocument or non processed data file it is set to false
success: function(data) // A function to be called if request succeeds
{
alert(data);
}
});
}));
</script>
</head>
<body>
<div class="main">
<h1>Ajax Image Upload</h1><br/>
<hr>
<form id="uploadimage" action="" method="post" enctype="multipart/form-data">
<div id="image_preview"><img id="previewing" src="noimage.png" /></div>
<hr id="line">
<div id="selectImage">
<label>Select Your Image</label><br/>
<input type="file" name="file" id="file" required />
<input type="submit" value="Upload" class="submit" />
</div>
</form>
</div>
</body>
</html>
var dataform = new FormData($("#myform")[0]);
//console.log(dataform);
$.ajax({
url: 'url',
type: 'POST',
data: dataform,
async: false,
success: function(res) {
response data;
},
cache: false,
contentType: false,
processData: false
});
$('#UploadB1').click(function(e){
e.preventDefault();
if (!fileupload.valid()) {
return false;
}
var myformData = new FormData();
myformData.append('file', $('#uploadFile')[0].files[0]);
$("#UpdateMessage5").html("Uploading file ....");
$("#UpdateMessage5").css("background","url(../include/images/loaderIcon.gif) no-repeat right");
myformData.append('mode', 'fileUpload');
myformData.append('myid', $('#myid').val());
myformData.append('type', $('#fileType').val());
//formData.append('myfile', file, file.name);
$.ajax({
url: 'include/fetch.php',
method: 'post',
processData: false,
contentType: false,
cache: false,
data: myformData,
enctype: 'multipart/form-data',
success: function(response){
$("#UpdateMessage5").html(response); //.delay(2000).hide(1);
$("#UpdateMessage5").css("background","");
console.log("file successfully submitted");
},error: function(){
console.log("not okay");
}
});
});
<input type="file" id="file">
<button id='process-file-button'>Process</button>
$('#process-file-button').on('click', function (e) {
let files = new FormData(), // you can consider this as 'data bag'
url = 'yourUrl';
files.append('fileName', $('#file')[0].files[0]); // append selected file to the bag named 'file'
$.ajax({
type: 'post',
url: url,
processData: false,
contentType: false,
data: files,
success: function (response) {
console.log(response);
},
error: function (err) {
console.log(err);
}
});
});
if (isset($_FILES) && !empty($_FILES)) {
$file = $_FILES['fileName'];
$name = $file['name'];
$path = $file['tmp_name'];
// process your file
}
<form class="fr" method='POST' enctype="multipart/form-data"> {% csrf_token %}
<textarea name='text'>
<input name='example_image'>
<button type="submit">
</form>
$(document).on('submit', '.fr', function(){
$.ajax({
type: 'post',
url: url, <--- you insert proper URL path to call your views.py function here.
enctype: 'multipart/form-data',
processData: false,
contentType: false,
data: new FormData(this) ,
success: function(data) {
console.log(data);
}
});
return false;
});
form = ThisForm(request.POST, request.FILES)
if form.is_valid():
text = form.cleaned_data.get("text")
example_image = request.FILES['example_image']
var jform = new FormData();
jform.append('user',$('#user').val());
jform.append('image',$('#image').get(0).files[0]); // Here's the important bit
$.ajax({
url: '/your-form-processing-page-url-here',
type: 'POST',
data: jform,
dataType: 'json',
mimeType: 'multipart/form-data', // this too
contentType: false,
cache: false,
processData: false,
success: function(data, status, jqXHR){
alert('Hooray! All is well.');
console.log(data);
console.log(status);
console.log(jqXHR);
},
error: function(jqXHR,status,error){
// Hopefully we should never reach here
console.log(jqXHR);
console.log(status);
console.log(error);
}
});