Fine Uploader-没有收到来自已加载iframe的有效消息

Question

[尝试使现有的精美上载器v4.2.2实例与IE8一起使用，但是它返回“没有从加载的iframe收到有效消息”。

阅读3.3和3.7 CORS support博客文章-修改了我的.net MVC处理程序，以检测非XHR请求并做出相应反应。在客户端，已经将CORS属性“ expected”设置为true，但是尝试将“ sendCredentials”和“ allowXdr”的组合设置为true，但效果不明显。

[使用Fiddler确认我返回了正确的内容类型（text / html），并且通常的JSON响应后是指向“ iframe.xss.response.js”的有效URL的脚本块-尝试同时托管主网址和上载程序处理程序子域。

在目前的浏览器中，一切仍然运行良好，就像我在尝试支持IE8时似乎缺少了一些明显的东西。

这是我消毒过的JS；

var fupParams = {
    userId: 12345,
    userKey: 67890
};

var fupInstance = $("#fine-uploader")
    .fineUploader({
        template: "qq-template",
        thumbnails: {
            placeholders: {
                waitingPath: "/placeholders/waitingPath.gif",
                notAvailablePath: "/placeholders/notAvailablePath.gif"
            }
        },
        session: {
            endpoint: "//upload.example.com/Upload/List",
            params: fupParams
        },
        request: {
            endpoint: "//upload.example.com/Upload/Upload",
            params: fupParams
        },
        failedUploadTextDisplay: {
            mode: "custom"
        },
        deleteFile: {
            customHeaders: {},
            enabled: true,
            endpoint: "//upload.example.com/Upload/Delete",
            method: "DELETE",
            forceConfirm: true,
            params: fupParams
        },
        validation: {
            allowedExtensions: Array("jpg","png")
        },
        cors: {
            expected: true,
            sendCredentials: false
        },
        autoUpload: true,
        editFilename: {
            enabled: true
        },
        classes: {
            success: "alert alert-success",
            fail: "alert alert-error"
        },
        showMessage: function (message) {
            // Simple event handler
        }
    })
    .on("submit", function (event, id, name) {
        // Use qq.Promise() to modify fupParams prior to upload
    })
    .on("submitDelete", function (event, id, name) {
        // Use qq.Promise() to modify fupParams prior to delete
    })
    .on("error", function (event, id, name, errorReason, xhrOrXdr) {
        // Simple event handler
    })
    .on("complete", function (event, id, name, response) {
        // Simple event handler
    })
    .on("sessionRequestComplete", function (event, response, success, xhrOrXdr) {
        // Simple event handler
    })
    .on("deleteComplete", function (event, id, xhrOrXdr, isError) {
        // Simple event handler
    })
;

包括通过Fiddler捕获的两个上载处理程序响应，首先将成功设置为false，因为我选择的图像太小；

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/7.5
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,PUT,POST,DELETE,OPTIONS
Access-Control-Allow-Headers: Content-Type, cache-control, x-requested-with
Access-Control-Allow-Credentials: false
Date: Tue, 17 Mar 2015 12:47:54 GMT
Content-Length: 204

{
  "success": false,
  "error": "Minimum upload size is 150 KB, "Winter.jpg" was 103 KB"
}<script src="//www.example.com/fineuploader-4.2.2/iframe.xss.response.js"></script>

[IE之后立即获取“ waitingPath.gif”和“ iframe.xss.response.js”，但我没有看到任何自定义错误文本-只是“没有有效消息”错误。

由于图像较大，第二次捕获成功设置为true，并且我们返回了一些自定义参数，结果与上面相同。

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/7.5
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,PUT,POST,DELETE,OPTIONS
Access-Control-Allow-Headers: Content-Type, cache-control, x-requested-with
Access-Control-Allow-Credentials: false
Date: Tue, 17 Mar 2015 12:51:18 GMT
Content-Length: 278

{
  "pageList": [],
  "name": "Winter 2.JPG",
  "uuid": "2563",
  "size": 281,
  "thumbnailUrl": null,
  "pageCount": 0,
  "success": true,
  "newUuid": "2563"
}<script src="//www.example.com/fineuploader-4.2.2/iframe.xss.response.js"></script>

EDIT：谢谢您的帮助，我的回答或者使用UUID不正确，或者完全丢失了它-最终结果请参见下文。

成功

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/7.5
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,PUT,POST,DELETE,OPTIONS
Access-Control-Allow-Headers: Content-Type, cache-control, x-requested-with
Access-Control-Allow-Credentials: false
Date: Tue, 17 Mar 2015 15:01:57 GMT
Content-Length: 310

{
  "pageList": [],
  "name": "Winter 2.JPG",
  "newUuid": "2567",
  "size": 281,
  "thumbnailUrl": null,
  "pageCount": 0,
  "success": true,
  "uuid": "6cb9f309-0c38-4a73-aa13-879abbfff008"
}<script src="//www.example.com/addin/fineuploader-4.2.2/iframe.xss.response.js"></script>

失败

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/7.5
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET,PUT,POST,DELETE,OPTIONS
Access-Control-Allow-Headers: Content-Type, cache-control, x-requested-with
Access-Control-Allow-Credentials: false
Date: Tue, 17 Mar 2015 15:01:43 GMT
Content-Length: 255

{
  "success": false,
  "uuid": "61a4e504-4b89-4b67-ad38-df23d7c4a247",
  "error": "Minimum upload size is 150 KB, "Winter.jpg" was 103 KB"
}<script src="//www.example.com/addin/fineuploader-4.2.2/iframe.xss.response.js"></script>