1.跨域的服务端设置:

使用express挂载跨域响应中间件

app.all("*", function (req,res,next) {
     let allowedOrigins = [     "http://192.168.1.101:3000",     "http://105.123.123.123:3000"   ]; 　// 这里是允许跨域的的domain列表   let origin = req.headers.origin;   if(allowedOrigins.indexOf(origin) > -1){
       res.setHeader('Access-Control-Allow-Origin', origin);   }   res.header('Access-Control-Allow-Credentials', true);// Allow Cookie   res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");   res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");   next(); });

2.$http的general用法:

$http({    url:"http://localhost:3005/login",    method:"POST",    withCredentials: true,    // 允许发送Cookie    headers: {        'Content-Type': 'application/x-www-form-urlencoded'    },    data: {        username:$scope.username,        password:$scope.password    },    // 使数据匹配body-parser的形式,否则会解析错误拿不到数据,如果不用这一个方法,数据会被解析成一个{key:value}的json,key是整个数据的字符串,而value是空.    transformRequest: function(obj) {        var str = [];        for(var p in obj){            str.push(encodeURIComponent(p) + '=' + encodeURIComponent(obj[p]));        }        return str.join('&');    }}).success(function (data) {    if (data.status == 1) {        alert("登录失败");    } else {        alert("登录成功");    }});