postData works on some page but doesn't work on some pages

Ionic Framework ionic-v3
1

Hi i will try to explain my issue. I have a login page and i can send data to php by this code

      this.postPvdr.postData(body, 'http://www.website.com/login.php').subscribe((data) =>{
        var alertbox = data.msg;
        if (data.success) {
           this.storage.set('session_storage', data.result);
           this.navCtrl.setRoot(HomePage);
           this.login_error_msg = "login success";
        }
        else {
           this.login_error_msg = alertbox;
        }
      });

but i try to check user info when auto login but i get corse error with this code

    this.storage.get('session_storage').then((res)=>{
      if(res == null){
        this.rootPage = LoginPage;
      }else{
        let body = {
          usernamedata : res.pb_username,
        };
        this.postPvdr.postData(body, 'http://www.website.com/user_login_time.php').subscribe((data) =>{
          if (data.success) {
            console.log("success");
        this.rootPage = HomePage;
        this.logged_username = res.pb_username;
          }
          else {
            console.log("unsuccess");
          }
        });
      }
    });

as you see i am using same code for posting data to php. but when login page posting it works perfect but when i check to login info it gives CORS errors.

this is my error

Access to XMLHttpRequest at 'http://www.website.com/user_login_time.php' from origin 'http://localhost:8100' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.

is there any idea for this issue?

2

I’m not sure that this is the cause of your issue, but never use storage to communicate during an app run. Only use it to talk to future launches of the app, so write whenever you wish, but read from storage only once (generally at app startup).

Instead, use a service provider that is injected by both pages. This way you don’t have to worry about race conditions caused by failure to wait on writes.