Adding a picture to the MEAN.JS sample with Angular-file-upload
I am using MEAN.JS (https://github.com/meanjs/mean) and angular-file-upload (https://github.com/danialfarid/angular-file-upload).
The "Article" sample provided by MEAN.JS contains two fields named "title" and "content". I want to modify that and add a "picture" field allowing a user to upload a picture.
I understand that I have to modify 3 files in MEAN.JS:
~myproject/app/models/article.server.model.js
~myproject/public/modules/articles/controllers/articles.client.controller.js
~myproject/public/modules/articles/views/create-article.client.view.html
However, I can not modify them successfully.
Answer
My solution uses angular-file-upload on the client and uses connect-multiparty to handle the file upload.
The images are stored directly in the database which limits their size. I have not included the required code to check the image size.
set up
bower install ng-file-upload --save
bower install ng-file-upload-shim --save
npm i connect-multiparty
npm update
all.js add angular-file-upload scripts
...
'public/lib/ng-file-upload/FileAPI.min.js',
'public/lib/ng-file-upload/angular-file-upload-shim.min.js',
'public/lib/angular/angular.js',
'public/lib/ng-file-upload/angular-file-upload.min.js',
...
config.js Inject angular-file-upload dependency
...
var applicationModuleVendorDependencies = ['ngResource', 'ngAnimate', 'ui.router', 'ui.bootstrap', 'ui.utils', 'angularFileUpload'];
...
article.client.controller.js Use angular-file-upload dependency
angular.module('articles').controller('ArticlesController', ['$scope', '$timeout', '$upload', '$stateParams', '$location', 'Authentication', 'Articles',
function($scope, $timeout, $upload, $stateParams, $location, Authentication, Articles) {
$scope.fileReaderSupported = window.FileReader !== null;
// Create new Article
$scope.create = function(picFile) {
console.log('create');
console.log(picFile);
var article = new Articles({
title: this.title,
content: this.content,
image: null
});
console.log(article);
$upload.upload({
url: '/articleupload',
method: 'POST',
headers: {'Content-Type': 'multipart/form-data'},
fields: {article: article},
file: picFile,
}).success(function (response, status) {
$location.path('articles/' + response._id);
$scope.title = '';
$scope.content = '';
}).error(function (err) {
$scope.error = err.data.message;
});
};
$scope.doTimeout = function(file) {
console.log('do timeout');
$timeout( function() {
var fileReader = new FileReader();
fileReader.readAsDataURL(file);
console.log('read');
fileReader.onload = function(e) {
$timeout(function() {
file.dataUrl = e.target.result;
console.log('set url');
});
};
});
};
$scope.generateThumb = function(file) {
console.log('generate Thumb');
if (file) {
console.log('not null');
console.log(file);
if ($scope.fileReaderSupported && file.type.indexOf('image') > -1) {
$scope.doTimeout(file);
}
}
};
}
create-article.client.view.html update the create view to handle file selection and upload
<section data-ng-controller="ArticlesController">
<div class="page-header">
<h1>New Article</h1>
</div>
<div class="col-md-12">
<form name="articleForm" class="form-horizontal" data-ng-submit="create(picFile)" novalidate>
<fieldset>
<div class="form-group" ng-class="{ 'has-error': articleForm.title.$dirty && articleForm.title.$invalid }">
<label class="control-label" for="title">Title</label>
<div class="controls">
<input name="title" type="text" data-ng-model="title" id="title" class="form-control" placeholder="Title" required>
</div>
</div>
<div class="form-group">
<label class="control-label" for="content">Content</label>
<div class="controls">
<textarea name="content" data-ng-model="content" id="content" class="form-control" cols="30" rows="10" placeholder="Content"></textarea>
</div>
</div>
<div class="form-group">
<label class="control-label" for="articleimage">Article Picture</label>
<div class="controls">
<input id="articleimage" type="file" ng-file-select="" ng-model="picFile" name="file" accept="image/*" ng-file-change="generateThumb(picFile[0], $files)" required="">
<br/>
<img ng-show="picFile[0].dataUrl != null" ng-src="{{picFile[0].dataUrl}}" class="img-thumbnail" height="50" width="100">
<span class="progress" ng-show="picFile[0].progress >= 0">
<div style="width:{{picFile[0].progress}}%" ng-bind="picFile[0].progress + '%'" class="ng-binding"></div>
</span>
<span ng-show="picFile[0].result">Upload Successful</span>
</div>
</div>
<div class="form-group">
<input type="submit" class="btn btn-default" ng-disabled="!articleForm.$valid" ng-click="uploadPic(picFile)">
</div>
<div data-ng-show="error" class="text-danger">
<strong data-ng-bind="error"></strong>
</div>
</fieldset>
</form>
</div>
</section>
view-article.client.view.html update list view to include image
<img ng-src="data:image/jpeg;base64,{{article.image}}" id="photo-id" width="200" height="200"/>
list-articles.client.view.html update view to include imgae
<img ng-src="data:image/jpeg;base64,{{article.image}}" id="photo-id" width="40" height="40"/>
article.server.model.js Add image to database model
...
image: {
type: String,
default: ''
},
...
article.server.routes.js Add new route for upload use connect-multiparty
...
multiparty = require('connect-multiparty'),
multipartyMiddleware = multiparty(),
...
app.route('/articleupload')
.post(users.requiresLogin, multipartyMiddleware, articles.createWithUpload);
...
article.server.controller.js Handle new route for upload require fs
...
fs = require('fs'),
...
/**
* Create a article with Upload
*/
exports.createWithUpload = function(req, res) {
var file = req.files.file;
console.log(file.name);
console.log(file.type);
console.log(file.path);
console.log(req.body.article);
var art = JSON.parse(req.body.article);
var article = new Article(art);
article.user = req.user;
fs.readFile(file.path, function (err,original_data) {
if (err) {
return res.status(400).send({
message: errorHandler.getErrorMessage(err)
});
}
// save image in db as base64 encoded - this limits the image size
// to there should be size checks here and in client
var base64Image = original_data.toString('base64');
fs.unlink(file.path, function (err) {
if (err)
{
console.log('failed to delete ' + file.path);
}
else{
console.log('successfully deleted ' + file.path);
}
});
article.image = base64Image;
article.save(function(err) {
if (err) {
return res.status(400).send({
message: errorHandler.getErrorMessage(err)
});
} else {
res.json(article);
}
});
});
};
...