java - 将文件上传到 Spring 时出现 net::ERR_CONNECTION_ABORTED 的可能原因是什么

Question

我正在使用 plupload (plupload.com) jQuery 插件将图像文件 AJAX 发送到 Java Spring 服务器。我尝试了服务器端 RESTful Controller 端点的不同实现。我已附上处理文件上传网址的具体方法。任何帮助将不胜感激。谢谢。

@RequestMapping(value = "/pictureUpload", method = RequestMethod.POST )
public @ResponseBody 
String productPictureUploadPost(@RequestBody MultipartFile multipartFile) {
    HomeController.logger.info("In method productPictureUploadPost in SettingsPanelController. : Entering");
    String orgName = multipartFile.getOriginalFilename();

    String filePath = "/my_uploads/" + orgName;
    File dest = new File(filePath);
    try {
        multipartFile.transferTo(dest);
    } catch (IllegalStateException e) {
        e.printStackTrace();
        return "File uploaded failed:" + orgName;
    } catch (IOException e) {
        e.printStackTrace();
        return "File uploaded failed:" + orgName;
    }
    HomeController.logger.info("In method productPictureUploadPost in SettingsPanelController. Exiting : " + "File uploaded:" + orgName);   
    return "File uploaded:" + orgName;
}

我还附加了 servlet .xml 多部分解析器声明。

<bean class="org.springframework.web.multipart.support.StandardServletMultipartResolver"/>

在客户端，我有一个名为的插件文件，如下面所附。

$(document).ready(function() {
$("#uploader").plupload({
    // General settings
    runtimes: 'html5,flash,silverlight,html4',

    url: "/pictureUpload",

    // Maximum file size
    max_file_size: '1000mb',

    // User can upload no more then 20 files in one go (sets multiple_queues to false)
    max_file_count: 3,

    // Specify what files to browse for
    filters: [
        { title: "Image files", extensions: "jpg,jpeg,gif,png" }
    ],

    // Rename files by clicking on their titles
    rename: true,

    // Sort files
    sortable: true,

    // Enable ability to drag'n'drop files onto the widget (currently only HTML5 supports that)
    dragdrop: true,

    // Views to activate
    views: {
        list: true,
        thumbs: true, // Show thumbs
        active: 'thumbs'
    },

    // Flash settings
    flash_swf_url : 'http://rawgithub.com/moxiecode/moxie/master/bin/flash/Moxie.cdn.swf',

    // Silverlight settings
    silverlight_xap_url : 'http://rawgithub.com/moxiecode/moxie/master/bin/silverlight/Moxie.cdn.xap'
});
});

Answer 1

在文件上传的上下文中，net::ERR_CONNECTION_ABORTED当 HTTP 服务器未完全读取客户端的 HTTP 请求正文并在上传过程中中止连接时会发生这种情况。当上传的文件太大时，通常会发生这种情况，服务器继续读取请求并提前失败是没有意义的。

中止连接意味着客户端在收到响应之前不会浪费带宽上传文件，但会触发上述错误。

HTTP 有一个提前终止连接的规定，Expect: 100-continue请求 header 和 100 Continue响应状态，您可以在此处阅读:http://benramsey.com/blog/2008/04/http-status-100-continue/

遗憾的是，大多数浏览器不会在文件上传期间发送它 ( Which browsers send the expect: 100-continue header? )。

但是由于您在客户端使用 Flash/Silverlight 进行上传，我建议您考虑让您的上传小部件发送 Expect: 100-continue到服务器。