本篇主要讲解$http(config)的config中的timeout项:
$http({
timeout: number
})
数值,从发出请求开始计算,等待的毫秒数,超过这个数还没有响应,则返回错误
demo:
html:
<!DOCTYPE html> <html ng-app = 'HttpGet'> <head> <title>18.4 $http(2)</title> <meta charset="utf-8"> <script src="angular.js"></script> <script src="script.js"></script> </head> <body> <div ng-controller = "dataController"> <span>{{data}}</span> </div> </body> </html>
js:
var jsonData = {name:"code_bunny"}; var httpGet = angular.module('HttpGet',[]); httpGet.factory('getData',function($http,$q){ return function(){ var defer = $q.defer(); $http({ method:'post', url:'/api/user', data: jsonData, headers: {'Authorization':'code_bunny'}, timeout: 1000 }).success(function(data,status,headers,config){ defer.resolve(data); }).error(function(data,status,headers,config){ defer.reject(data) }); return defer.promise } }); httpGet.controller('dataController',function($scope,getData){ $scope.data = getData() });
nodejs:
var express = require('express'); var bodyParser = require('body-parser'); var app = express(); // parse application/x-www-form-urlencoded app.use(bodyParser.urlencoded({ extended: false })); // parse application/json app.use(bodyParser.json()); app.use(express.static(__dirname+'')); var data = "name=code_bunny&age=3"; app.post('/api/user',function(req,res){ console.log(req.body); setTimeout(function(){ res.send(data) },2000) }); app.listen(3000);
如代码所示,我们在后台设置2000毫秒以后返回内容,但是在$http的congif里设置等待超时为1000毫秒,所以,还不等到后台返回数据,请求就会被取消:
*注意: timeout只能在某个单独的$http()里面配置,不能通过$httpProvider.defaults.timeout进行配置
完整代码路径: https://github.com/OOP-Code-Bunny/angular/tree/master/OREILLY/18.4%20%24http(2)