我正在使用MEAN.JS(
https://github.com/meanjs/mean)和angular-file-upload(
https://github.com/danialfarid/angular-file-upload).
MEAN.JS提供的“Article”样本包含两个名为“title”和“content”的字段.我想修改它并添加一个“图片”字段,允许用户上传图片.
~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
但是,我无法成功修改它们.
我的解决方案在客户端上使用
angular-file-upload并使用
connect-multiparty来处理文件上载.
图像直接存储在数据库中,这限制了它们的大小.我没有包含检查图像大小所需的代码.
建立
bower install ng-file-upload --save bower install ng-file-upload-shim --save npm i connect-multiparty npm update
all.js
添加angular-file-upload脚本
...
'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
注入angular-file-upload依赖项
... var applicationModuleVendorDependencies = ['ngResource','ngAnimate','ui.router','ui.bootstrap','ui.utils','angularFileUpload']; ...
article.client.controller.js
使用angular-file-upload依赖项
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) {
$scope.doTimeout(file);
}
}
};
}
创建-article.client.view.html
更新创建视图以处理文件选择和上载
<section data-ng-controller="ArticlesController">
<div class="page-header">
<h1>New Article</h1>
</div>
<div class="col-md-12">
<form name="articleForm" class="form-horizontal" data-ng-submit="create(picFile)" novalidate>
<fieldset>
<div class="form-group" ng-class="{ 'has-error': articleForm.title.$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>
视图article.client.view.html
更新列表视图以包含图像
<img ng-src="data:image/jpeg;base64,{{article.image}}" id="photo-id" width="200" height="200"/>
列表articles.client.view.html
更新视图以包含imgae
<img ng-src="data:image/jpeg;base64,{{article.image}}" id="photo-id" width="40" height="40"/>
article.server.model.js
将图像添加到数据库模型
...
image: {
type: String,default: ''
},...
article.server.routes.js
添加新上传路由使用connect-multiparty
...
multiparty = require('connect-multiparty'),multipartyMiddleware = multiparty(),...
app.route('/articleupload')
.post(users.requiresLogin,multipartyMiddleware,articles.createWithUpload);
...
article.server.controller.js
处理上传新路线需要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);
}
});
});
};
...
