Ionic can't get open cors

Question

I am trying to get API data from live server in ionic android app but it returns this error:

Access to XMLHttpRequest at \'https://example.com/api/categories         


        

Answer 1

I solved my issue using these Headers for my API:

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Credentials: true ");
header("Access-Control-Allow-Methods:GET,POST");
header("Access-Control-Allow-Headers: Authorization, Content-Type, Depth, User-Agent, X-File-Size, X-Requested-With, If-Modified-Since, X-File-Name, Cache-Control");

And Angular Http:

//GET data details
 getData(authToken){
      const httpOptions = {
          headers: new HttpHeaders({
              'Accept': 'application/json, text/plain',
              'Content-Type':  'application/json',
              'Authorization': authToken
            })
   };
   //console.log(authToken);
   return this.http.get(this.apiGetUrl, httpOptions).retry(3);
 }

Like the previous answer, an Options request automatically gets sent with the GET or POST. If you have apache servers, you can echo$headers = apache_request_headers(); to see what is all coming through. Comparison for $_SERVER and Apache here.

In my case, I run if statements:

if(isset($headers["Authorization"]) && isset($headers["Content-Type"])){
  //handle get request
  }
else{
  //handle options request
   echo " False,Re-routing Options Request";
  }

I would test your HTTP call in the browser and look at dev tools to confirm the requests being sent. I hope this helps!