没有jquery或iframes的AJAX文件上传/表单提交？ [英] AJAX file upload/form submit without jquery or iframes?

问题描述

是否可以在没有jQuery或IFrame的情况下提交AJAX表单（所以只是纯JavaScript）？我正在发送一个有效的struts fileUploadAction。动作的代码是否仍然适用于异步提交，或者是否需要添加异步表单提交？

Is it possible to do an AJAX form submit without jQuery or IFrames (so just pure JavaScript)? I'm currently sending to a struts fileUploadAction that works. Would the action's code still work with the asynchronous submit, or are there additions required to pick up the async form submit?

我正在使用struts 1.x和当前的表单是：

I am using struts 1.x and current my form is:

<html:form action="fileUploadAction" method="post" enctype="multipart/form-data">
    ...form elements...
    <html:file property="theFile" />
    ...other elements...
</html:form>

是否可以提交此表格，从而使用AJAX上传文件？

Can this form be submitted, and thus the file uploaded with AJAX?

推荐答案

如果我理解你是对的，你可以使用以下代码上传文件异步。根据需要修改它

If I understood you correct, you can use the following code to upload the file async. Modify it as you like

var AjaxFileUploader = function () {
    this._file = null;
    var self = this;

    this.uploadFile = function (uploadUrl, file) {
        var xhr = new XMLHttpRequest();
        xhr.onprogress = function (e) {
            ...
        };

        xhr.onload = function (e) {
            ...
        };

        xhr.onerror = function (e) {
            ...
        };

        xhr.open("post", uploadUrl, true);

        xhr.setRequestHeader("Content-Type", "multipart/form-data");
        xhr.setRequestHeader("X-File-Name", file.name);
        xhr.setRequestHeader("X-File-Size", file.size);
        xhr.setRequestHeader("X-File-Type", file.type);

        xhr.send(file);
    };
};

AjaxFileUploader.IsAsyncFileUploadSupported = function () {
    return typeof (new XMLHttpRequest().upload) !== 'undefined';
}

 if (AjaxFileUploader.IsAsyncFileUploadSupported) {
        ajaxFileUploader = new AjaxFileUploader();

        $("form").submit(function () {
            var uploader = $("#fileUploader")[0];

            if (uploader.files.length == 0) {
                return;
            } else {
                ajaxFileUploader.uploadFile(
                    "/YourUploadUrl",
                    uploader.files[0]);
            }

            return false;
        });
    }

要上传表单，请使用FormData类，使用表单值填充并发布它与XHR。

To upload the form use the FormData class, populate it with form values and post it with XHR.

更新：
对于HTML4，请尝试以下

Update: For HTML4 try the following

• http://www.albanx.com/ ？pid = 5& subid = 21


• 使用jsp和javascript进行异步文件上传（AJAX文件上传）

• http://www.albanx.com/?pid=5&subid=21
• Asynchronous file upload (AJAX file upload) using jsp and javascript

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