javascript - 使用 $http 上传文件

Question

这道题是不是太难了？

我的客户端代码包含发布数据变量，并且想知道如何将文件数据添加到 $http.post。

我看过一些示例，它们要么使用自定义指令，要么使用手动表单提交，这两种情况都是我想要的。

客户端:

<input type="file" id="photo">
//file can be accessed using
var photo = document.getElementById("photo").files[0];
$scope.data.photo = photo 

或者

var formData = new FormData();
formData.append("photo", photo);
formData.append("title", $scope.data.title);
this.delegate.insert(formData); 

已发送至服务

$http.post("/admin/speakers/?" + data, token.body) //token.body = $scope.data
    .success(function(data, status, headers, config) {
     })
    .error(function(data, status, headers, config) {
    });

期望输出服务器端(使用 POSTMAN - REST 客户端生成)

console.log(request.files, request.body);

{ photo: 
   { fieldname: 'photo',
     originalname: '01.jpg',
     name: 'fbb54fa6d588ac253ca7dab08a904356.jpg',
     encoding: '7bit',
     mimetype: 'image/jpeg',
     path: '/var/folders/jg/hkmz0fdn64g8w1jgf60j2lcw0000gn/T/fbb54fa6d588ac253ca7dab08a904356.jpg',
     extension: 'jpg',
     size: 12279,
     truncated: false,
     buffer: null } } 

{ name: 'SA',
  title: 'Dev',
  company: 'CA',
  bio: 'some bio',
  twitter: '@twitter',
  sessionId: '1' }

Answer 1

尝试将 Content-Type header 设置为 undefined 并将 transformRequest 设置为 angular.identity(以不序列化 FormData 对象):

$http.post("/admin/speakers/?" + data, token.body, {
    transformRequest: angular.identity,
    headers: {
        'Content-Type': undefined
    }
}).success(function(data, status, headers, config) {

}).error(function(data, status, headers, config) {

});

Angular’s default transformRequest function will try to serialize our FormData object, so we override it with the identity function to leave the data intact. Angular’s default Content-Type header for POST and PUT requests is application/json, so we want to change this, too. By setting ‘Content-Type’: undefined, the browser sets the Content-Type to multipart/form-data for us and fills in the correct boundary. Manually setting ‘Content-Type’: multipart/form-data will fail to fill in the boundary parameter of the request.

(https://uncorkedstudios.com/blog/multipartformdata-file-upload-with-angularjs)