The use of $http in AngularJS

Question

I have learnt angularJS for three days,but I have some questions during my study.

well,in the "Run Block":

angular.module("techNodeApp",["ngRoute"]).
run(function($window,$rootScope,$http,$location){
     $http({
        url:"/api/validate",
        method:"GET"
  }).success(function(user){
        console.log("success");        
        $rootScope.me=user;
        $location.path("/");
  }).error(function(data){
        console.log("error");
        $location.path("/login");
  });

     $rootScope.logout=function(){
        $http({
         url:"/api/logout",
         method:"GET"
    }).success(function(){
         console.log("I've logged out");
         $rootScope.me=null;
         $location.path("/login");
    })
   }
})

In the server(Node.js):

app.get("/api/validate",function(req,res){
    console.log("I can hear you FE");     
});

app.get("/ajax/validate",function(req,res){
    var _userId=req.session._userId;
    if(_userId){
        Controllers.findUserById(_userId,function(err,user){
            if(err){
                res.json(401,{msg:err});
            }else{
                res.json(user);
            }
        })
    }else{
        res.json(401,null);
    }
});

The first I enter the website I haven't log in,so I thought when the app start run.It must go to the page of "http://localhost:3000/login".But it went to "http://localhost:3000" and it can't print the string "I can hear you FE" in the cmd.

mostruash · Accepted Answer · 2015-06-25 01:34:45Z

1

1) Your node.js app doesn't respond with a user when a request is made to /api/validate. So in your angular app, when that AJAX request succeeds, user will be undefined.

2) When that request succeeds, you set $location.path to /. So it will obviously go to localhost:3000/ and not to localhost:3000/api/validate.

3) $http makes an AJAX request, it doesn't change the location of browser (URL that browser loads). $location.path does that.

4) Currently it should actually display I can hear you FE in node.js output, unless you have some other problems with your node.js configuration or unless you forget to bootstrap your angularapp (typically with ng-app directive in your html).

answered Jun 25, 2015 at 1:34

mostruash

4,1892 gold badges26 silver badges40 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

X Rene Over a year ago

I just have edit my node.js code. when I get to the page /api/validate ,I think it's must go to the page of /login. But it doesn't work

mostruash Over a year ago

I guess you are really confused about AJAX requests made with $http, request paths that node.js handle, and $location.path. Instead of trying to hack through it to make it work, try to understand how it works.

Collectives™ on Stack Overflow

The use of $http in AngularJS

1 Answer 1

2 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Related