AJAX上传angular.js 1.3.0中的multipart/form-data的'意外令牌'

Question

纹理上传的以下代码在angularjs 1.2.26中工作,但在我将Web应用程序升级到1.3.0时停止工作.

HTML代码

<input file-model="file" name="file" type="file">

fileModel指令

app.directive('fileModel', [ '$parse', function($parse) {
    return {
        restrict : 'A',
        link : function(scope, element, attrs) {
            var model = $parse(attrs.fileModel);
            var modelSetter = model.assign;

            element.bind('change', function() {
                scope.$apply(function() {
                    modelSetter(scope, element[0].files[0]);
                });
            });

            scope.$on("reset", function() {
                element.val(null);
            });

        }
    };
} ]);

上传功能 - 在1.2.26中选择"multipart/form-data",因为Content-Type不起作用.但是使用"undefined"作为Content-Type angular会做一些使它工作的魔法.

var upload = function(textureUploadUrl) {
        var formData = new FormData();
        formData.append('name', $scope.name);
        formData.append('file', $scope.file);

        $http.post(textureUploadUrl, formData, {
            transformRequest : angular.identity,
            headers : {
                'Content-Type' : undefined
            }
        }).success(function(uploadedTexture) {
            console.log(uploadedTexture);

            // further processing of uploadedTexture
        });
}

错误:

SyntaxError: Unexpected token h
    at Object.parse (native)
    at fromJson (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:1104:14)
    at defaultHttpResponseTransform (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:8572:18)
    at https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:8517:12
    at forEach (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:335:20)
    at transformData (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:8516:3)
    at transformResponse (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:9224:23)
    at processQueue (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:12914:27)
    at https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:12930:27
    at Scope.$eval (https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.js:14123:28) 

有谁知道如何在新版本中使用它？

UPDATE

我已经把问题缩小了一点.它不适用于1.3.0-rc.5,但使用之前的版本(rc.4)它确实有效.所以,我目前正试图弄清楚哪些更改会导致我的问题.这是更改日志.

Answer 1

问题出在我服务器端纹理上传请求的响应头中.为了构建我的应用程序,我使用了Spring MVC并且有一个像这样的请求映射,但没有produces规范:

@RequestMapping(value = "/uploadUrl", method = RequestMethod.POST, produces = "text/plain; charset=utf-8")
@ResponseBody
public String textureUploadPOST(HttpServletRequest req) {
    // upload texture and create serveUrl for the texture
    return serveUrl;
}

因此,未指定text/plain为Content-Type,Spring会自动将其application/json用作Content-Type.这会导致angular.js从1.3.0-rc.5(更改)开始调用JSON.parse .我的纹理上传返回一个指向图像所在位置的URL.因为这是一个普通的字符串,所以它导致了所描述的错误消息.所以,不要忘记在服务器响应中指定正确的内容类型:-)