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跨域,前端开发中经常遇到的问题,AngularJS实现跨域方式类似于Ajax,使用CORS机制。
下面阐述一下AngularJS中使用$http实现跨域请求数据。
AngularJS XMLHttpRequest:$http用于读取远程服务器的数据
2. 指定其它回调函数,但必须是定义在window下的全局函数。url中必须加上callback。
2. AngularJS端使用$http.get()
2. AngularJS端使用$http.post(),同时设置请求头信息
方法二【返回值,需要使用对应callback方法接收,但如何置于$scope???】:
下面阐述一下AngularJS中使用$http实现跨域请求数据。
AngularJS XMLHttpRequest:$http用于读取远程服务器的数据
- $http.post(url, data, [config]).success(function(){ ... });
- $http.get(url, [config]).success(function(){ ... });
- $http.get(url, [config]).success(function(){ ... });
一、$http.jsonp【实现跨域】
1. 指定callback和回调函数名,函数名为JSON_CALLBACK时,会调用success回调函数,JSON_CALLBACK必须全为大写。2. 指定其它回调函数,但必须是定义在window下的全局函数。url中必须加上callback。
二、$http.get【实现跨域】
1. 在服务器端设置允许在其他域名下访问- response.setHeader("Access-Control-Allow-Origin", "*"); //允许所有域名访问
- response.setHeader("Access-Control-Allow-Origin", "http://www.123.com"); //允许www.123.com访问
三、$http.post【实现跨域】
1. 在服务器端设置允许在其他域名下访问,及响应类型、响应头设置- response.setHeader("Access-Control-Allow-Origin", "*");
- response.setHeader("Access-Control-Allow-Methods","POST");
- response.setHeader("Access-Control-Allow-Headers","x-requested-with,content-type");
- $http.post('http://localhost/ajax/getAllIndustryCategoty.pt',{languageColumn:'name_eu'},{'Content-Type':'application/x-www-form-urlencoded'}).success(function(data){
- $scope.industries = data;
- });
四、实现方式
跨域方式一【JSONP】:
方法一:- $http.jsonp("http://localhost/sitesettings/getBadgeInfo.pt?jsonp=JSON_CALLBACK&siteid=137bd406").success(function(data){ ... });
- // The name of the callback should be the string JSON_CALLBACK.
- $http.jsonp("http://localhost/sitesettings/getBadgeInfo.pt?jsonp=badgeabc&siteid=137bd406");
- function badgeabc(data){ ... }
- public String execute() throws Exception {
- String result = FAIL;
- response.setHeader("", "");
- SiteHandlerAction siteHandlerAction = (SiteHandlerAction)BeansFactory.getBean(SiteHandlerAction.class);
- BadgeHandlerAction badgeHandlerAction = (BadgeHandlerAction)BeansFactory.getBean(BadgeHandlerAction.class);
- if("".equals(siteid) || siteid == null || StringUtils.isBlank("jsonp")){
- result = FAIL;
- }else{
- Site site = siteHandlerAction.find(siteid);
- UserBadgeStatus userBadgeStatus = badgeHandlerAction.getUserBadgeStatus(site.getId());
- if(userBadgeStatus != null){
- result = "{\"t\":"+userBadgeStatus.getStyle()+",\"l\":"+userBadgeStatus.getSuspend_location()+",\"s\":"+site.getId()+"}";
- JSONObject jsonObj = JSONObject.fromObject(result);
- String json = jsonObj.toString();
- result = jsonp + "(" + json + ")";
- }
- }
- PrintWriter write = response.getWriter();
- write.print(result);
- write.flush();
- write.close();
- return NONE;
- }
跨域方式二【$http.get()】:
- function getAdustryController($scope,$http){
- $http.get('http://localhost/ajax/getAllIndustryCategoty.pt?languageColumn=name_eu').success(function(data){
- $scope.industries = data;
- });
- }
跨域方式三【$http.post()】:
- function getAdustryController($scope,$http){
- $http.post('http://localhost/ajax/getAllIndustryCategoty.pt',{languageColumn:'name_eu'},{'Content-Type':'application/x-www-form-urlencoded'}).success(function(data){
- $scope.industries = data;
- });
- }
- // java端支持跨域请求
- public String execute(){
- response.setHeader("Access-Control-Allow-Origin", "*"); //允许哪些url可以跨域请求到本域
- response.setHeader("Access-Control-Allow-Methods","POST"); //允许的请求方法,一般是GET,POST,PUT,DELETE,OPTIONS
- response.setHeader("Access-Control-Allow-Headers","x-requested-with,content-type"); //允许哪些请求头可以跨域
- SiteHandlerAction SiteHandler = (SiteHandlerAction) BeansFactory.getBean(SiteHandlerAction.class);
- List<IndustryCategory> list = SiteHandler.getAllIndustryCategory(); //所有的分类集合
- JSONArray jsonArray = JSONArray.fromObject(list); //将list转为json
- String json = jsonArray.toString(); //转为json字符串
- try {
- PrintWriter write = response.getWriter();
- write.print(json);
- write.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- return NONE;
- }
- <table ng-controller="getAdustryController">
- <tr ng-repeat='industry in industries'>
- <td>{{ industry.id }}</td>
- <td>{{ industry.name_ch }}</td>
- <td>{{ industry.name_eu }}</td>
- <td>{{ industry.name_jp }}</td>
- </tr>
- </table>