API call result string not able to retrieve in html page

Question

I am trying to call one Spring boot REST API from Angular component and trying to display the result string by using alert(). When I am trying to display, it is giving the error

message: "Unexpected token P in JSON at position 0"

The result of this API is successfully giving back the string "Permission Updated Successfully" at Postman.

MY component code is like the following in my .ts file,

this.manageuserService.modifyUserPermissionApiMethod(this.modificationObj)
  .subscribe((data:any)=> {alert(data);});

Where have I gone wrong in implementing this?

Does the response you get include the quotes? Otherwise, this is not valid JSON. — Henry
– Henry, Commented Aug 10, 2020 at 15:46

Nikolay · Accepted Answer · 2020-08-10 16:20:43Z

1

Angular HTTP Client by default expects response type to be 'application/json', but in your case the response from the server it is not a valid JSON ( i suppose it is just simple text - 'text/plain').

You should pass an additional parameter responseType: 'text', please check the following link: https://angular.io/guide/http#requesting-non-json-data

answered Aug 10, 2020 at 16:20

Nikolay

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