如何在AngularJS中上传多部分表单? [英] How do I upload a multipart form in AngularJS?
问题描述
表单视图:
<form enctype="multipart/form-data" ng-submit="upload(file)">
<input type="file" ng-model="modal.file" accept="image/gif" app-filereader /><br />
<br>
<textarea name="description" placeholder="Description" ng-model="description" id="" cols="30" rows="10"></textarea>
<br>
<input type="hidden" name="user" ng-model="user" value="{{ user }}" />
<br>
<input type="submit" value="Submit" class="network-sensitive button button-block button" />
</form>
指令:
.directive('appFilereader', function(
$q
){
var slice = Array.prototype.slice;
return {
restrict: 'A'
, require: '?ngModel'
, link: function(scope, element, attrs, ngModel){
if(!ngModel) return;
ngModel.$render = function(){}
element.bind('change', function(e){
var element = e.target;
$q.all(slice.call(element.files, 0).map(readFile))
.then(function(values){
if(element.multiple) ngModel.$setViewValue(values);
else ngModel.$setViewValue(values.length ? values[0] : null);
});
function readFile(file) {
var deferred = $q.defer();
var reader = new FileReader()
reader.onload = function(e){
deferred.resolve(e.target.result);
}
reader.onerror = function(e) {
deferred.reject(e);
}
reader.readAsDataURL(file);
return deferred.promise;
}
});
}
};
});
我的服务中的上传功能:
Upload function in my services:
upload: function(file) {
var token = $window.sessionStorage.token;
var url = 'http://url.co/api/posts/creates';
var $cache = $cacheFactory.get('$http');
var deffered = $q.defer();
var data = $cache.get(url);
if(!data) {
$http({
url: url,
method: "POST",
params: { access_token: token },
data: file,
headers: {'Content-Type': undefined },
transformRequest: angular.identity
}).then(function(res) {
deffered.resolve(res);
});
} else {
deffered.resolve(data);
}
return deffered.promise;
}
我没有包含控制器代码,因为它只是从中继表单数据服务的模式和该部分的工作。
I've not included the controller code as it's just relaying the form data from the modal to the service and that part's working.
我遇到的问题是文件是作为编码数据提交的(我的知识对于二进制文件有点不稳定)数据和blob等)。我的API(用Symfony2编写)期望正常的文件提交而不是数据字符串。
The problem I'm having is that the file is being submitted as encoded data (my knowledge is a bit shaky about binary data and blobs etc). And my API (written in Symfony2) is expecting a normal file submission as opposed to the data string.
那么如何将二进制blob转换为我可以提交的图像文件呢?或者我错过了什么?
So how would I convert that binary blob into an image file I can then submit? Or am I missing something?
推荐答案
使用此模块 https://github.com/danialfarid/angular-file-upload
非常简单易用。
use this module https://github.com/danialfarid/angular-file-upload is very simple to use.
ex :
var $file;//single file
$scope.sendFiles= function(){
$upload.upload({
url: yourUrl,
method: "POST",
data: { data: $scope.yourOtherObject },
file: $file
}).success(function (data, status, headers, config) {
// file is uploaded successfully
console.log(data);
console.log("File upload SUCCESS");
}).error(function (data, status) {
console.log("File upload FAILED");
});
}
$scope.onFileSelect = function ($files) {
for (var i = 0; i < $files.length; i++) {
$file = $files[i];//set a single file
}
};
HTML CODE
HTML CODE
<input type="file" name="myfile" ng-file-select="onFileSelect($files)" />
<button ng-click='sendFiles()'>Send file</button>
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