Develop Reference

Convert an image to base64 in javascript

I want to transform my image into base64 and then into JSON to send it via a post request to a server in java script.
I have looked for several solutions on the internet but none of them really work. Can someone explain to me the logic to have to achieve the code?
For now, I have this code:
JS code :
<script>
function convert (){
//image = btoa(URL="../static/images/images_final.jpg");
fetch("/predict" ,{
method: "POST",
body: JSON.stringify({result})
})
}
var file = window.document.querySelector('#form-base64-converter-encode-image-file').files[0];
getBase64(file);
const fileInput = document.getElementById("fileInput");
fileInput.addEventListener("change", e => {
const file = fileInput.files[0];
const reader = new FileReader();
reader.addEventListener("load", () => {
console.log(reader.result);
});
reader.readAsDataURL(file);
});
</script>
htlm code :
<form>
<input type="file" id="fileInput">
<button class="button"
type="reset"
onClick="convert()">
<h4>ENVOYER </h4>
</button>
</form>
API flask:
#app.post("/predict")
def predict_image():
req = request.get_json(force=True)
b64Image = req["image"]
buf = base64.b64decode(b64Image)
return print(b64Image[:20], buf[:20])

upload form with other form fiels angularjs [duplicate]

Here is my HTML form:
<form name="myForm" ng-submit="">
<input ng-model='file' type="file"/>
<input type="submit" value='Submit'/>
</form>
I want to upload an image from local machine and want to read the content of the uploaded file. All this I want to do using AngularJS.
When I try to print the value of $scope.file it comes as undefined.

Some of the answers here propose using FormData(), but unfortunately that is a browser object not available in Internet Explorer 9 and below. If you need to support those older browsers, you will need a backup strategy such as using <iframe> or Flash.
There are already many Angular.js modules to perform file uploading. These two have explicit support for older browsers:
https://github.com/leon/angular-upload - uses iframes as a fallback
https://github.com/danialfarid/ng-file-upload - uses FileAPI/Flash as a fallback
And some other options:
https://github.com/nervgh/angular-file-upload/
https://github.com/uor/angular-file
https://github.com/twilson63/ngUpload
https://github.com/uploadcare/angular-uploadcare
One of these should fit your project, or may give you some insight into how to code it yourself.

The easiest is to use HTML5 API, namely FileReader
HTML is pretty straightforward:
<input type="file" id="file" name="file"/>
<button ng-click="add()">Add</button>
In your controller define 'add' method:
$scope.add = function() {
var f = document.getElementById('file').files[0],
r = new FileReader();
r.onloadend = function(e) {
var data = e.target.result;
//send your binary data via $http or $resource or do anything else with it
}
r.readAsBinaryString(f);
}
Browser Compatibility
Desktop Browsers
Edge 12, Firefox(Gecko) 3.6(1.9.2),
Chrome 7, Opera* 12.02, Safari 6.0.2
Mobile Browsers
Firefox(Gecko) 32,
Chrome 3,
Opera* 11.5,
Safari 6.1
Note : readAsBinaryString() method is deprecated and readAsArrayBuffer() should be used instead.

This is the modern browser way, without 3rd party libraries. Works on all the latest browsers.
app.directive('myDirective', function (httpPostFactory) {
return {
restrict: 'A',
scope: true,
link: function (scope, element, attr) {
element.bind('change', function () {
var formData = new FormData();
formData.append('file', element[0].files[0]);
httpPostFactory('upload_image.php', formData, function (callback) {
// recieve image name to use in a ng-src
console.log(callback);
});
});
}
};
});
app.factory('httpPostFactory', function ($http) {
return function (file, data, callback) {
$http({
url: file,
method: "POST",
data: data,
headers: {'Content-Type': undefined}
}).success(function (response) {
callback(response);
});
};
});
HTML:
<input data-my-Directive type="file" name="file">
PHP:
if (isset($_FILES['file']) && $_FILES['file']['error'] == 0) {
// uploads image in the folder images
$temp = explode(".", $_FILES["file"]["name"]);
$newfilename = substr(md5(time()), 0, 10) . '.' . end($temp);
move_uploaded_file($_FILES['file']['tmp_name'], 'images/' . $newfilename);
// give callback to your angular code with the image src name
echo json_encode($newfilename);
}
js fiddle (only front-end)
https://jsfiddle.net/vince123/8d18tsey/31/

Below is working example of file upload:
http://jsfiddle.net/vishalvasani/4hqVu/
In this one function called
setFiles
From View which will update the file array in controller
or
You can check jQuery File Upload using AngularJS
http://blueimp.github.io/jQuery-File-Upload/angularjs.html

You can achieve nice file and folder upload using flow.js.
https://github.com/flowjs/ng-flow
Check out a demo here
http://flowjs.github.io/ng-flow/
It doesn't support IE7, IE8, IE9, so you'll eventually have to use a compatibility layer
https://github.com/flowjs/fusty-flow.js

Use the onchange event to pass the input file element to your function.
<input type="file" onchange="angular.element(this).scope().fileSelected(this)" />
So when a user selects a file, you have a reference to it without the user needing to click an "Add" or "Upload" button.
$scope.fileSelected = function (element) {
var myFileSelected = element.files[0];
};

I tried all alternatives that #Anoyz (Correct answer) gives... and the best solution is https://github.com/danialfarid/angular-file-upload
Some Features:
Progress
Multifiles
Fields
Old browsers (IE8-9)
It's work fine for me. You just have to pay attention to instructions.
In server-side i use NodeJs, Express 4 and Multer middleware to manage multipart request.

HTML
<html>
<head></head>
<body ng-app = "myApp">
<form ng-controller = "myCtrl">
<input type = "file" file-model="files" multiple/>
<button ng-click = "uploadFile()">upload me</button>
<li ng-repeat="file in files">{{file.name}}</li>
</form>
Scripts
<script src =
"http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<script>
angular.module('myApp', []).directive('fileModel', ['$parse', function ($parse) {
return {
restrict: 'A',
link: function(scope, element, attrs) {
element.bind('change', function(){
$parse(attrs.fileModel).assign(scope,element[0].files)
scope.$apply();
});
}
};
}]).controller('myCtrl', ['$scope', '$http', function($scope, $http){
$scope.uploadFile=function(){
var fd=new FormData();
console.log($scope.files);
angular.forEach($scope.files,function(file){
fd.append('file',file);
});
$http.post('http://localhost:1337/mediaobject/upload',fd,
{
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
}).success(function(d)
{
console.log(d);
})
}
}]);
</script>

The <input type=file> element does not by default work with the ng-model directive. It needs a custom directive:
Working Demo of select-ng-files Directive that Works with ng-model1
angular.module("app",[]);
angular.module("app").directive("selectNgFiles", function() {
return {
require: "ngModel",
link: function postLink(scope,elem,attrs,ngModel) {
elem.on("change", function(e) {
var files = elem[0].files;
ngModel.$setViewValue(files);
})
}
}
});
<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app="app">
<h1>AngularJS Input `type=file` Demo</h1>
<input type="file" select-ng-files ng-model="fileList" multiple>
<h2>Files</h2>
<div ng-repeat="file in fileList">
{{file.name}}
</div>
</body>
$http.post from a FileList
$scope.upload = function(url, fileList) {
var config = { headers: { 'Content-Type': undefined },
transformResponse: angular.identity
};
var promises = fileList.map(function(file) {
return $http.post(url, file, config);
});
return $q.all(promises);
};
When sending a POST with a File object, it is important to set 'Content-Type': undefined. The XHR send method will then detect the File object and automatically set the content type.

Easy with a directive
Html:
<input type="file" file-upload multiple/>
JS:
app.directive('fileUpload', function () {
return {
scope: true, //create a new scope
link: function (scope, el, attrs) {
el.bind('change', function (event) {
var files = event.target.files;
//iterate files since 'multiple' may be specified on the element
for (var i = 0;i<files.length;i++) {
//emit event upward
scope.$emit("fileSelected", { file: files[i] });
}
});
}
};
In the directive we ensure a new scope is created and then listen for changes made to the file input element. When changes are detected with emit an event to all ancestor scopes (upward) with the file object as a parameter.
In your controller:
$scope.files = [];
//listen for the file selected event
$scope.$on("fileSelected", function (event, args) {
$scope.$apply(function () {
//add the file object to the scope's files collection
$scope.files.push(args.file);
});
});
Then in your ajax call:
data: { model: $scope.model, files: $scope.files }
http://shazwazza.com/post/uploading-files-and-json-data-in-the-same-request-with-angular-js/

i think this is the angular file upload:
ng-file-upload
Lightweight Angular JS directive to upload files.
Here is the DEMO page.Features
Supports upload progress, cancel/abort upload while in progress, File drag and drop (html5), Directory drag and drop (webkit), CORS, PUT(html5)/POST methods, validation of file type and size, show preview of selected images/audio/videos.
Cross browser file upload and FileReader (HTML5 and non-HTML5) with Flash polyfill FileAPI. Allows client side validation/modification before uploading the file
Direct upload to db services CouchDB, imgur, etc... with file's content type using Upload.http(). This enables progress event for angular http POST/PUT requests.
Seperate shim file, FileAPI files are loaded on demand for non-HTML5 code meaning no extra load/code if you just need HTML5 support.
Lightweight using regular $http to upload (with shim for non-HTML5 browsers) so all angular $http features are available
https://github.com/danialfarid/ng-file-upload

Your file and json data uploading at the same time .
// FIRST SOLUTION
var _post = function (file, jsonData) {
$http({
url: your url,
method: "POST",
headers: { 'Content-Type': undefined },
transformRequest: function (data) {
var formData = new FormData();
formData.append("model", angular.toJson(data.model));
formData.append("file", data.files);
return formData;
},
data: { model: jsonData, files: file }
}).then(function (response) {
;
});
}
// END OF FIRST SOLUTION
// SECOND SOLUTION
// If you can add plural file and If above code give an error.
// You can try following code
var _post = function (file, jsonData) {
$http({
url: your url,
method: "POST",
headers: { 'Content-Type': undefined },
transformRequest: function (data) {
var formData = new FormData();
formData.append("model", angular.toJson(data.model));
for (var i = 0; i < data.files.length; i++) {
// add each file to
// the form data and iteratively name them
formData.append("file" + i, data.files[i]);
}
return formData;
},
data: { model: jsonData, files: file }
}).then(function (response) {
;
});
}
// END OF SECOND SOLUTION

You can use a FormData object which is safe and fast:
// Store the file object when input field is changed
$scope.contentChanged = function(event){
if (!event.files.length)
return null;
$scope.content = new FormData();
$scope.content.append('fileUpload', event.files[0]);
$scope.$apply();
}
// Upload the file over HTTP
$scope.upload = function(){
$http({
method: 'POST',
url: '/remote/url',
headers: {'Content-Type': undefined },
data: $scope.content,
}).success(function(response) {
// Uploading complete
console.log('Request finished', response);
});
}

http://jsfiddle.net/vishalvasani/4hqVu/ works fine in chrome and IE (if you update CSS a little in background-image).
This is used for updating progress bar:
scope.progress = Math.round(evt.loaded * 100 / evt.total)
but in FireFox angular's [percent] data is not updated in DOM successfully,although files are uploading successfully.

You may consider IaaS for file upload, such as Uploadcare. There is an Angular package for it: https://github.com/uploadcare/angular-uploadcare
Technically it's implemented as a directive, providing different options for uploading, and manipulations for uploaded images within the widget:
<uploadcare-widget
ng-model="object.image.info.uuid"
data-public-key="YOURKEYHERE"
data-locale="en"
data-tabs="file url"
data-images-only="true"
data-path-value="true"
data-preview-step="true"
data-clearable="true"
data-multiple="false"
data-crop="400:200"
on-upload-complete="onUCUploadComplete(info)"
on-widget-ready="onUCWidgetReady(widget)"
value="{{ object.image.info.cdnUrl }}"
/>
More configuration options to play with: https://uploadcare.com/widget/configure/

I know this is a late entry but I have created a simple upload directive. Which you can get working in no time!
<input type="file" multiple ng-simple-upload web-api-url="/api/Upload" callback-fn="myCallback" />
ng-simple-upload more on Github with an example using Web API.

HTML
<input type="file" id="file" name='file' onchange="angular.element(this).scope().profileimage(this)" />
add 'profileimage()' method to your controller
$scope.profileimage = function(selectimage) {
console.log(selectimage.files[0]);
var selectfile=selectimage.files[0];
r = new FileReader();
r.onloadend = function (e) {
debugger;
var data = e.target.result;
}
r.readAsBinaryString(selectfile);
}

This should be an update/comment to #jquery-guru's answer but as I don't have enough rep it will go here. It fixes the errors that are now generated by the code.
https://jsfiddle.net/vzhrqotw/
The change is basically:
FileUploadCtrl.$inject = ['$scope']
function FileUploadCtrl(scope) {
To:
app.controller('FileUploadCtrl', function($scope)
{
Feel free to move to a more appropriate location if desired.

I've read all the thread and the HTML5 API solution looked the best. But it changes my binary files, corrupting them in a manner I've not investigated. The solution that worked perfectly for me was :
HTML :
<input type="file" id="msds" ng-model="msds" name="msds"/>
<button ng-click="msds_update()">
Upload
</button>
JS:
msds_update = function() {
var f = document.getElementById('msds').files[0],
r = new FileReader();
r.onloadend = function(e) {
var data = e.target.result;
console.log(data);
var fd = new FormData();
fd.append('file', data);
fd.append('file_name', f.name);
$http.post('server_handler.php', fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
})
.success(function(){
console.log('success');
})
.error(function(){
console.log('error');
});
};
r.readAsDataURL(f);
}
Server side (PHP):
$file_content = $_POST['file'];
$file_content = substr($file_content,
strlen('data:text/plain;base64,'));
$file_content = base64_decode($file_content);

I am able to upload files using AngularJS by using below code:
The file for the argument that needs to be passed for the function ngUploadFileUpload is $scope.file as per your question.
The key point here is to use transformRequest: []. This will prevent $http with messing with the contents of the file.
function getFileBuffer(file) {
var deferred = new $q.defer();
var reader = new FileReader();
reader.onloadend = function (e) {
deferred.resolve(e.target.result);
}
reader.onerror = function (e) {
deferred.reject(e.target.error);
}
reader.readAsArrayBuffer(file);
return deferred.promise;
}
function ngUploadFileUpload(endPointUrl, file) {
var deferred = new $q.defer();
getFileBuffer(file).then(function (arrayBuffer) {
$http({
method: 'POST',
url: endPointUrl,
headers: {
"accept": "application/json;odata=verbose",
'X-RequestDigest': spContext.securityValidation,
"content-length": arrayBuffer.byteLength
},
data: arrayBuffer,
transformRequest: []
}).then(function (data) {
deferred.resolve(data);
}, function (error) {
deferred.reject(error);
console.error("Error", error)
});
}, function (error) {
console.error("Error", error)
});
return deferred.promise;
}

Above accepted answer is not browser compatible. If some one has compatibility issue try this.
Fiddle
View Code
<div ng-controller="MyCtrl">
<input type="file" id="file" name="file"/>
<br>
<button ng-click="add()">Add</button>
<p>{{data}}</p>
</div>
Controller code
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.data = 'none';
$scope.add = function(){
var f = document.getElementById('file').files[0],
r = new FileReader();
r.onloadend = function(e){
var binary = "";
var bytes = new Uint8Array(e.target.result);
var length = bytes.byteLength;
for (var i = 0; i < length; i++)
{
binary += String.fromCharCode(bytes[i]);
}
$scope.data = (binary).toString();
alert($scope.data);
}
r.readAsArrayBuffer(f);
}
}

in simple words
in Html - add below code only
<form name="upload" class="form" data-ng-submit="addFile()">
<input type="file" name="file" multiple
onchange="angular.element(this).scope().uploadedFile(this)" />
<button type="submit">Upload </button>
</form>
in the controller - This function is called when you click "upload file button". it will upload the file. you can console it.
$scope.uploadedFile = function(element) {
$scope.$apply(function($scope) {
$scope.files = element.files;
});
}
add more in controllers - below code add into the function . This function is called when you click on button which is used "hitting the api (POST)". it will send file(which uploaded) and form-data to the backend .
var url = httpURL + "/reporttojson"
var files=$scope.files;
for ( var i = 0; i < files.length; i++)
{
var fd = new FormData();
angular.forEach(files,function(file){
fd.append('file',file);
});
var data ={
msg : message,
sub : sub,
sendMail: sendMail,
selectUsersAcknowledge:false
};
fd.append("data", JSON.stringify(data));
$http.post(url, fd, {
withCredentials : false,
headers : {
'Content-Type' : undefined
},
transformRequest : angular.identity
}).success(function(data)
{
toastr.success("Notification sent successfully","",{timeOut: 2000});
$scope.removereport()
$timeout(function() {
location.reload();
}, 1000);
}).error(function(data)
{
toastr.success("Error in Sending Notification","",{timeOut: 2000});
$scope.removereport()
});
}
in this case .. i added below code as form data
var data ={
msg : message,
sub : sub,
sendMail: sendMail,
selectUsersAcknowledge:false
};

<form id="csv_file_form" ng-submit="submit_import_csv()" method="POST" enctype="multipart/form-data">
<input ng-model='file' type="file"/>
<input type="submit" value='Submit'/>
</form>
In angularJS controller
$scope.submit_import_csv = function(){
var formData = new FormData(document.getElementById("csv_file_form"));
console.log(formData);
$.ajax({
url: "import",
type: 'POST',
data: formData,
mimeType:"multipart/form-data",
contentType: false,
cache: false,
processData:false,
success: function(result, textStatus, jqXHR)
{
console.log(result);
}
});
return false;
}

We have used HTML, CSS and AngularJS. Following example shows about how to upload the file using AngularJS.
<html>
<head>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
</head>
<body ng-app = "myApp">
<div ng-controller = "myCtrl">
<input type = "file" file-model = "myFile"/>
<button ng-click = "uploadFile()">upload me</button>
</div>
<script>
var myApp = angular.module('myApp', []);
myApp.directive('fileModel', ['$parse', function ($parse) {
return {
restrict: 'A',
link: function(scope, element, attrs) {
var model = $parse(attrs.fileModel);
var modelSetter = model.assign;
element.bind('change', function(){
scope.$apply(function(){
modelSetter(scope, element[0].files[0]);
});
});
}
};
}]);
myApp.service('fileUpload', ['$http', function ($http) {
this.uploadFileToUrl = function(file, uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
})
.success(function(){
})
.error(function(){
});
}
}]);
myApp.controller('myCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){
$scope.uploadFile = function(){
var file = $scope.myFile;
console.log('file is ' );
console.dir(file);
var uploadUrl = "/fileUpload";
fileUpload.uploadFileToUrl(file, uploadUrl);
};
}]);
</script>
</body>
</html>

Working Example using Simple Directive (ng-file-model):
.directive("ngFileModel", [function () {
return {
$scope: {
ngFileModel: "="
},
link: function ($scope:any, element, attributes) {
element.bind("change", function (changeEvent:any) {
var reader = new FileReader();
reader.onload = function (loadEvent) {
$scope.$apply(function () {
$scope.ngFileModel = {
lastModified: changeEvent.target.files[0].lastModified,
lastModifiedDate: changeEvent.target.files[0].lastModifiedDate,
name: changeEvent.target.files[0].name,
size: changeEvent.target.files[0].size,
type: changeEvent.target.files[0].type,
data: changeEvent.target.files[0]
};
});
}
reader.readAsDataURL(changeEvent.target.files[0]);
});
}
}
}])
and use FormData to upload file in your function.
var formData = new FormData();
formData.append("document", $scope.ngFileModel.data)
formData.append("user_id", $scope.userId)
all credits go for
https://github.com/mistralworks/ng-file-model
I have faced a small probelm you can check it here:
https://github.com/mistralworks/ng-file-model/issues/7
Finally,here's a forked repo: https://github.com/okasha93/ng-file-model/blob/patch-1/ng-file-model.js

The code will helps to insert file
<body ng-app = "myApp">
<form ng-controller="insert_Ctrl" method="post" action="" name="myForm" enctype="multipart/form-data" novalidate>
<div>
<p><input type="file" ng-model="myFile" class="form-control" onchange="angular.element(this).scope().uploadedFile(this)">
<span style="color:red" ng-show="(myForm.myFile.$error.required&&myForm.myFile.$touched)">Select Picture</span>
</p>
</div>
<div>
<input type="button" name="submit" ng-click="uploadFile()" class="btn-primary" ng-disabled="myForm.myFile.$invalid" value="insert">
</div>
</form>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<script src="insert.js"></script>
</body>
insert.js
var app = angular.module('myApp',[]);
app.service('uploadFile', ['$http','$window', function ($http,$window) {
this.uploadFiletoServer = function(file,uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
})
.success(function(data){
alert("insert successfull");
$window.location.href = ' ';//your window location
})
.error(function(){
alert("Error");
});
}
}]);
app.controller('insert_Ctrl', ['$scope', 'uploadFile', function($scope, uploadFile){
$scope.uploadFile = function() {
$scope.myFile = $scope.files[0];
var file = $scope.myFile;
var url = "save_data.php";
uploadFile.uploadFiletoServer(file,url);
};
$scope.uploadedFile = function(element) {
var reader = new FileReader();
reader.onload = function(event) {
$scope.$apply(function($scope) {
$scope.files = element.files;
$scope.src = event.target.result
});
}
reader.readAsDataURL(element.files[0]);
}
}]);
save_data.php
<?php
require "dbconnection.php";
$ext = pathinfo($_FILES['file']['name'],PATHINFO_EXTENSION);
$image = time().'.'.$ext;
move_uploaded_file($_FILES["file"]["tmp_name"],"upload/".$image);
$query="insert into test_table values ('null','$image')";
mysqli_query($con,$query);
?>

this works
file.html
<html>
<head>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
</head>
<body ng-app = "app">
<div ng-controller = "myCtrl">
<input type = "file" file-model = "myFile"/>
<button ng-click = "uploadFile()">upload me</button>
</div>
</body>
<script src="controller.js"></script>
</html>
controller.js
var app = angular.module('app', []);
app.service('fileUpload', ['$http', function ($http) {
this.uploadFileToUrl = function(file, uploadUrl){
var fd = new FormData();
fd.append('file', file);
$http.post(uploadUrl, fd, {
transformRequest: angular.identity,
headers: {'Content-Type': undefined}
}).success(function(res){
console.log(res);
}).error(function(error){
console.log(error);
});
}
}]);
app.controller('fileCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){
$scope.uploadFile = function(){
var file = $scope.myFile;
console.log('file is ' );
console.dir(file);
var uploadUrl = "/fileUpload.php"; // upload url stands for api endpoint to handle upload to directory
fileUpload.uploadFileToUrl(file, uploadUrl);
};
}]);
</script>
fileupload.php
<?php
$ext = pathinfo($_FILES['file']['name'],PATHINFO_EXTENSION);
$image = time().'.'.$ext;
move_uploaded_file($_FILES["file"]["tmp_name"],__DIR__. ' \\'.$image);
?>

UPLOAD FILES
<input type="file" name="resume" onchange="angular.element(this).scope().uploadResume()" ng-model="fileupload" id="resume" />
$scope.uploadResume = function () {
var f = document.getElementById('resume').files[0];
$scope.selectedResumeName = f.name;
$scope.selectedResumeType = f.type;
r = new FileReader();
r.onloadend = function (e) {
$scope.data = e.target.result;
}
r.readAsDataURL(f);
};
DOWNLOAD FILES:
<a href="{{applicant.resume}}" download> download resume</a>
var app = angular.module("myApp", []);
app.config(['$compileProvider', function ($compileProvider) {
$compileProvider.aHrefSanitizationWhitelist(/^\s*(https?|local|data|chrome-extension):/);
$compileProvider.imgSrcSanitizationWhitelist(/^\s*(https?|local|data|chrome-extension):/);
}]);

app.directive('ngUpload', function () {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var options = {};
options.enableControls = attrs['uploadOptionsEnableControls'];
// get scope function to execute on successful form upload
if (attrs['ngUpload']) {
element.attr("target", "upload_iframe");
element.attr("method", "post");
// Append a timestamp field to the url to prevent browser caching results
element.attr("action", element.attr("action") + "?_t=" + new Date().getTime());
element.attr("enctype", "multipart/form-data");
element.attr("encoding", "multipart/form-data");
// Retrieve the callback function
var fn = attrs['ngUpload'].split('(')[0];
var callbackFn = scope.$eval(fn);
if (callbackFn == null || callbackFn == undefined || !angular.isFunction(callbackFn))
{
var message = "The expression on the ngUpload directive does not point to a valid function.";
// console.error(message);
throw message + "\n";
}
// Helper function to create new i frame for each form submission
var addNewDisposableIframe = function (submitControl) {
// create a new iframe
var iframe = $("<iframe id='upload_iframe' name='upload_iframe' border='0' width='0' height='0' style='width: 0px; height: 0px;
border: none; display: none' />");
// attach function to load event of the iframe
iframe.bind('load', function () {
// get content - requires jQuery
var content = iframe.contents().find('body').text();
// execute the upload response function in the active scope
scope.$apply(function () { callbackFn(content, content !== "" /* upload completed */); });
// remove iframe
if (content != "") // Fixes a bug in Google Chrome that dispose the iframe before content is ready.
setTimeout(function () { iframe.remove(); }, 250);
submitControl.attr('disabled', null);
submitControl.attr('title', 'Click to start upload.');
});
// add the new iframe to application
element.parent().append(iframe);
};
// 1) get the upload submit control(s) on the form (submitters must be decorated with the 'ng-upload-submit' class)
// 2) attach a handler to the controls' click event
$('.upload-submit', element).click(
function () {
addNewDisposableIframe($(this) /* pass the submit control */);
scope.$apply(function () { callbackFn("Please wait...", false /* upload not completed */); });
var enabled = true;
if (options.enableControls === null || options.enableControls === undefined || options.enableControls.length >= 0) {
// disable the submit control on click
$(this).attr('disabled', 'disabled');
enabled = false;
}
$(this).attr('title', (enabled ? '[ENABLED]: ' : '[DISABLED]: ') + 'Uploading, please wait...');
// submit the form
$(element).submit();
}
).attr('title', 'Click to start upload.');
}
else
alert("No callback function found on the ngUpload directive.");
}
};
});
<form class="form form-inline" name="uploadForm" id="uploadForm"
ng-upload="uploadForm12" action="rest/uploadHelpFile" method="post"
enctype="multipart/form-data" style="margin-top: 3px;margin-left:
6px"> <button type="submit" id="mbUploadBtn" class="upload-submit"
ng-hide="true"></button> </form>
#RequestMapping(value = "/uploadHelpFile", method =
RequestMethod.POST) public #ResponseBody String
uploadHelpFile(#RequestParam(value = "file") CommonsMultipartFile[]
file,#RequestParam(value = "fileName") String
fileName,#RequestParam(value = "helpFileType") String
helpFileType,#RequestParam(value = "helpFileName") String
helpFileName) { }

Kendo Upload cannot get Byte array of selected file

How can take the byte array data of selected file? from select event i can get e.files[0].rawFile but i cannot find where is stored the byte[]. i want this data on client side

I found the documentation pretty poor on this matter as well. The documentation is geared at using a REST endpoint to do server side processing of the file. Most of the examples of client side processing are just for showing the file names, which isn't super useful if you want to do any meaningful client-side validation of the content of the file. In my case, I have CSV files I want to do some pre-processing on the client side. The trick is you need to use the HTML5 a FileReader. Here is an example in AngularJS where $ctrl.fileContent will have the content of a CSV file.
controller: ['$scope', function ($scope) {
var $ctrl = this;
// function called by kendo upload component
$ctrl.onSelect = function(e) {
var message = e.files.map(function(file) {
return $ctrl.readFile(file);
}).join(', ');
// log file names being uploaded
console.log('event :: files select (' + message + ')');
};
// read file and do basic validation
$ctrl.readFile = function(file) {
var reader = new FileReader();
reader.onload = function(e) {
var text = reader.result;
console.log('File contents :: ' + text);
$ctrl.fileContent = text;
};
reader.readAsText(file.rawFile);
// return file name
return file.name;
};
// function called by kendo upload component
$ctrl.onUpload = function(e) {
// todo
console.log('Uploading file');
console.log($ctrl.fileContent);
};
}]
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div class="content-panel">
<div class="row">
<div class="form-group col-lg-3 col-md-3 col-sm-6 col-xs-12">
<h4>Upload CSV files</h4>
<input name="files"
type="file"
kendo-upload
k-async="{ saveUrl: '$ctrl.save', removeUrl: 'remove', autoUpload: false }"
k-select="$ctrl.onSelect"
k-validation="{ allowedExtensions: ['csv']}"
k-upload="$ctrl.onUpload"
/>
</div>
</div>
</div>

try something like this:
function(data) {
data = btoa(data);
var bytesArr = [];
for(var i = 0; i < data.length; i++) {
bytesArr.push(data.charCodeAt(i));
}
return new Uint8Array(bytesArr);
}

Upload image in angular js

I want to upload the image in angular js the image name need to send to db and the uploaded image move to an folder(target location) Same like move_uploaded_file in PHP. I have implemented as below:
<input type="file" id="file" name="file" ng-model="machineimage"/>
<button ng-click="uploadMachineImage($index)">Add</button>
In controller:
$scope.uploadMachineImage = function() {
var imgobject = document.getElementById('file').files[0];
console.log(imgobject['name']);
r = new FileReader();
r.onloadend = function(e) {
var data = e.target.result;
console.log(data);
}
r.readAsBinaryString(imgobject);
};

AngularJS image upload preview without directive

I'm uploading files via service:
var addFile = function(files) {
var deferred = $q.defer();
var fd = new FormData();
fd.append("file", files[0]);
$http.post("/files", fd, {
***
})
.success(function(data, status, headers, config) {
***
})
.error(function(err, status) {
***
});
***
};
and in controller I have something like:
uplService.addFile($scope.files).then(function(url) {
$scope.news.Photo = url;
});
and in HTML view:
<input type="file" name="file" onchange="angular.element(this).scope().photoChanged(this.files)" />
before that I uploaded file on-the-go, when I select file it goes directly to server, but now I need to display it in my form when I select it, but upload later, all I see in web is using directives, but how could I organize it without using directives?

Can you try this in your controller to pass your file object here:
$scope.fileReaderSupported = window.FileReader != null;
$scope.photoChanged = function(files){
if (files != null) {
var file = files[0];
if ($scope.fileReaderSupported && file.type.indexOf('image') > -1) {
$timeout(function() {
var fileReader = new FileReader();
fileReader.readAsDataURL(file);
fileReader.onload = function(e) {
$timeout(function(){
$scope.thumbnail.dataUrl = e.target.result;
});
}
});
}
}
};
and on the view
<img ng-show="thumbnail.dataUrl != null" ng-src="{{ thumbnail.dataUrl }}" class="thumb">
demo here
Hope this help

I read this article, which helped me to solve the problem about uploading the image.
If you want to show your selected file, try this:
<img data-ng-src="data:image/png;base64,{{news.Photo}}" id="photo-id"/>
Explanation:
Your property for image in Model/ViewModel/Class must be an array of bytes, like
public byte[] Photo { get; set; }
The data:image/jpeg;base64 defines the byte array from news.Photo so it can be rendered correctly on the clients browser.
The $scope.news.Photo in your case is just an scoped variable which contains the drawed image with byte created by the byte equivalent in the $scope.uploadFile function from article.
I hope it will be also helpful for you.