我正在尝试以一种形式从多个输入元素上传多个文件。
举个例子 :
<form id="category-form" method="post" enctype="multipart/form-data" class="form" name="form">
<div class="form-group">
<p>Pictures of the A Category</p>
<input id="a_pics" accept="image/*" type="file" class="file" multiple="true" my-file-upload="a_pics" required/>
</div>
<div class="form-group">
<p>Pictures of the B Category</p>
<input id="b_pics" accept="image/*" type="file" class="file" multiple="true" my-file-upload="b_pics" required/>
</div>
</form>
我有文件上传服务。有了这个,我可以知道它来自哪个输入元素。
.service('fileService', function () {
var file = {};
var fileService = {};
fileService.getFile = function (name) {
return file[name];
};
fileService.setFile = function (newFile, index, name) {
if (index === 0 && file[name] === undefined)
file[name] = [];
file[name][index] = newFile;
};
return fileService;
})
.directive('myFileUpload', function (fileService) {
return function (scope, element, attrs) {
element.bind('change', function () {
var index;
var index_file = 0;
for (index = 0; index < element[0].files.length; index++) {
fileService.setFile(element[0].files[index], index_file, attrs.myFileUpload);
index_file++;
}
index_file = 0;
});
}
});
在此之前,一切正常。我得到了我的类别/文件的地图。但是,当我将它上传到服务器时,我需要这样做:
var a_pics = fileService.getFile($scope.a_pics);
var b_pics = fileService.getFile($scope.b_pics);
var option = {
transformRequest: angular.identity,
headers: {'Content-Type': plan_pics.type}
};
var fd = new FormData();
var index;
for (index = 0; index < a_pics.length; index++)
fd.append('file', a_pics[index]);
for (index = 0; index < b_pics.length; index++)
fd.append('file', b_pics[index]);
$http.post('/api/projects', fd, option);
所以当服务器收到这个时,它无法知道文件的类别。我懂了:
[{ fieldname: 'file',
originalname: 'a_cat.png',
name: 'f771ac79f61dbdbf6fe689f593939ac5.png',
encoding: '7bit',
mimetype: 'image/png',
path: 'client/assets/images/f771ac79f61dbdbf6fe689f593939ac5.png',
extension: 'png',
size: 8185,
truncated: false,
buffer: null },
{ fieldname: 'file',
originalname: 'a_cat (1).png',
name: '830dc77921461b10fecf35004fc00724.png',
encoding: '7bit',
mimetype: 'image/png',
path: 'client/assets/images/830dc77921461b10fecf35004fc00724.png',
extension: 'png',
size: 12192,
truncated: false,
buffer: null },
{ fieldname: 'file',
originalname: 'b_cat_8.jpg',
name: '39f3bd6a7204ac5fdf114a870ece9f50.jpg',
encoding: '7bit',
mimetype: 'image/jpeg',
path: 'client/assets/images/39f3bd6a7204ac5fdf114a870ece9f50.jpg',
extension: 'jpg',
size: 98143,
truncated: false,
buffer: null }]
我试图在 File 对象中添加一个字段。它不起作用。你有什么建议吗?我正在使用 Angular、Express、Multer 和 Node。