BackandProvider を使用しているようです。これをバイパスするには、自分でアップロードを実装できます。Backand ドキュメントから
<body class="container" ng-app="app" ng-controller="DemoCtrl" ng-init="initCtrl()">
<h2>Backand Simple Upload File</h2>
<br/>
<form role="form" name="uploadForm">
<div class="row">
<img ng-src="" ng-show="imageUrl" />
<input id="fileInput" type="file" accept="*/*" ng-model="filename" />
<input type="button" value="x" class="delete-file" title="Delete file" ng-disabled="!imageUrl" ng-click="deleteFile()" />
</div>
</form>
</body>
// input file onchange callback
function imageChanged(fileInput) {
//read file content
var file = fileInput.files[0];
var reader = new FileReader();
reader.onload = function(e) {
upload(file.name, e.currentTarget.result).then(function(res) {
$scope.imageUrl = res.data.url;
$scope.filename = file.name;
}, function(err){
alert(err.data);
});
};
reader.readAsDataURL(file);
};
// register to change event on input file
function initUpload() {
var fileInput = document.getElementById('fileInput');
fileInput.addEventListener('change', function(e) {
imageChanged(fileInput);
});
}
// call to Backand action with the file name and file data
function upload(filename, filedata) {
// By calling the files action with POST method in will perform
// an upload of the file into Backand Storage
return $http({
method: 'POST',
url : Backand.getApiUrl() + baseActionUrl + objectName,
params:{
"name": filesActionName
},
headers: {
'Content-Type': 'application/json'
},
// you need to provide the file name and the file data
data: {
"filename": filename,
"filedata": filedata.substr(filedata.indexOf(',') + 1, filedata.length) //need to remove the file prefix type
}
});
};