如何使用AngularJS上传文件？

Question

我正在尝试使用AngularJS上传文件.这是我的代码:

HTML

<input type="file" file-model="myFile"/>
<button ng-click="uploadFile()">upload me</button>

JavaScript的

$scope.uploadFile = function(){
    var file = $scope.myFile;
    var uploadUrl = "http://admin.localhost/images/patanjali/";
    VariantService.uploadFileToUrl(file, uploadUrl);
};

VariantService.uploadFileToUrl = function(file, uploadUrl){
    var fd = new FormData();
    fd.append('file', file);
    $http.post(uploadUrl, fd, {
        transformRequest: angular.identity,
        headers: {'Content-Type': undefined}
    })
    .success(function(){
        alert ('success');
    })
    .error(function(){
    });
}

虽然我可以在我的服务中看到("成功")警报,但该文件未保存在控制器中提供的位置.

有人能帮我吗？缺什么？

Answer 1

看起来你正在使用这个jfiddle的代码为你的应用程序:

myApp.service('fileUpload', ['$http', function ($http) {
    this.uploadFileToUrl = function(file, uploadUrl){
        var fd = new FormData();
        fd.append('file', file);
        $http.post(uploadUrl, fd, {
            transformRequest: angular.identity,
            headers: {'Content-Type': undefined}
        })
        .success(function(){
        })
        .error(function(){
        });
    }
}]);

正确配置后,这仅用于从客户端发布数据; 服务器还需要配置为接受/保存数据.你如何做到这一点取决于你的后端技术堆栈.

Answer 2

我有同样的问题.我尝试了下面的代码,我的问题解决了.

var req = {
    method: 'POST',
    url: url,
    headers: {
        'Content-Type': "application/json",
    },
    data: data,
    transformRequest: function(data, headersGetter) {
        var formData = new FormData();
        angular.forEach(data, function(value, key) {
            formData.append(key, value);
        });
        var headers = headersGetter();
        delete headers['Content-Type'];
        return formData;
    }
}

$http(req)
    .success(function(response) {
        $scope.Models = response;
    })
    .error(function(data, status, headers, config) {

        // called asynchronously if an error occurs
        // or server returns response with an error status.
        alert(data);
    });