JQuery将文件发送给Django
我有下一个问题。 当我通过表单发送POST请求时:
<form id="uploadForm" action="/theme/zip/type/" method="post" enctype="multipart/form-data">
{% csrf_token %}
<input id="fileInput" class="input-file" name="upload" type="file">
<input type="submit" value="Upload" />
</form>
然后在服务器上我有代码:
print request.FILES
服务器打印:
<MultiValueDict: {u'upload': [<InMemoryUploadedFile: ID_12241.zip (application/zip)>]}>
当我在jQuery代码中逐步执行此操作时:
var content = zip.generate();
var options = {
url: '/theme/zip/type/',
data: {
file: content
}
};
$('#uploadForm').ajaxSubmit(options);
我在'request.POST'的'file'参数中有这个文件,但'request.FILES'是空的()。 我做错了什么?
看一下JQUery表单插件,它能够使用ajax上传文件。
根据其网站上的文档
Browsers that support the XMLHttpRequest Level 2 will be able to upload files seamlessly and even get progress updates as the upload proceeds. For older browsers, a fallback technology is used which involves iframes since it is not possible to upload files using the level 1 implmenentation of the XMLHttpRequest object.
我在我的项目中使用这个,你不必为旧浏览器定义任何iframe。 这个插件会自动为你做。 以下是实现ajax文件上传的示例代码 -
HTML文件看起来像(下载并链接html文件中的jquery.form.js): -
<form id="uploadForm" method="post" action="/theme/zip/type/"> {% csrf_token %}
<input type="file" id="fileInput" name="upload"/>
<button type="submit">Upload</button>
</form>
<script src="jquery-ui.min.js"></script>
<script src="jquery.form.js"></script>
在js文件中添加以下代码: -
var options = {
beforeSubmit:showRequest, // pre-submit callback
success:showResponse, // post-submit callback
resetForm: false // reset the form after successful submit
};
//uploadForm is the name of your form
$('#uploadForm').submit(function() {
// inside event callbacks 'this' is the DOM element so we first
// wrap it in a jQuery object and then invoke ajaxSubmit
$(this).ajaxSubmit(options);
// !!! Important !!!
// always return false to prevent standard browser submit and
// page navigation return false;
});
// pre-submit callback
function showRequest(formData, jqForm, options) {
// formData is an array; here we use $.param to convert it
// to a string to display it but the form plugin does
// this for you automatically when it submits the data
var queryString = $.param(formData);
// jqForm is a jQuery object encapsulating the form element.
// To access the DOM element for the form do this:
// var formElement = jqForm[0];
alert('About to submit: nn' + queryString);
// here we could return false to prevent the form from being submitted;
// returning anything other than false will allow the
// form submit to continue
return true;
}
// post-submit callback
function showResponse(responseText, statusText, xhr, $form) {
// for normal html responses, the first argument to the success callback
// is the XMLHttpRequest object's responseText property
// if the ajaxSubmit method was passed an Options Object with the dataType
// property set to 'xml' then the first argument to the success callback
// is the XMLHttpRequest object's responseXML property
// if the ajaxSubmit method was passed an Options Object with the dataType
// property set to 'json' then the first argument to the success callback
// is the json data object returned by the server
alert('status: ' + statusText + 'nnresponseText: n' + responseText +
'nnoutput div should have been updated with the responseText.');
}
一旦你点击提交按钮,将会调用.submit()函数。 该函数返回false,这对于防止浏览器回发很重要。 在此功能中定义了2个回调函数。
showRequest
将被调用,在这里你可以看到所有的发布数据。 showResponse
将在服务器返回响应时调用。 在服务器上,您将在request.FILES中获取数据。 从服务器返回一个可以在showResponse
函数中访问的JSON响应。
传统意义上的Ajax是XMLHttpRequest,它不允许您编码并将本地文件发送到服务器。
通过“ajax”进行上传的常见方式是使用Flash swf处理在同一页面上的上传,或者使用具有不可见1x1 iframe的目标的表单。
尝试
http://net.tutsplus.com/tutorials/javascript-ajax/uploading-files-with-ajax/
或者尝试http://www.uploadify.com/
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