how to pass a request parameter in retrofit post request-CodePudding

I have a post request that will send details to the server. The condition is that each user was assigned a unique value to and this value must be passed when the user want to place the request. I have a model class that is passed through the @Body annotation but I don't know how to pass this user's unique key along with this model class.

The key was passed in the backend as a request parameter. Please note that this token is not as an `Authorization header`, it's just a unique token that was assigned to each user for authentication purpose
    
Here is how the backend looks like It was developed with `Spring boot`
    
    @PostMapping("appointment/book")
    public ResponseEntity<ApiResponse> bookAppointment(@RequestBody AppointmentBookingDto appointmentBookingDto, @RequestParam("token") String token) throws DataNotFoundException, ParseException, DataAlreadyExistException {
    
            return appointmentBookingService.bookAppointment(appointmentBookingDto,token);
        }
    
This is how I tried to pass it in my interface class in android studio
    
     @POST("appointment/book")
        Call<ApiResponse> bookAppointment(@Body AppointmentBookingDto appointmentBookingDto, @Path("token") String token);

Here is the activity that I called the bookAppointment method.

 private void bookAppointment() {
        progressBar.setVisibility(View.VISIBLE);
        date = btnDate.getText().toString();
        time = btnTime.getText().toString();

        AppointmentBookingDto appointmentBookingDto = new AppointmentBookingDto(time, date, purpose.getText().toString());

        Call<ApiResponse> call = BaseUrlClient
                .getInstance().getApi().bookAppointment(
                        appointmentBookingDto, token.getText().toString()
                );
        call.enqueue(new Callback<ApiResponse>() {
            @Override
            public void onResponse(Call<ApiResponse> call, Response<ApiResponse> response) {
                if (response.code() == 201) {
                    progressBar.setVisibility(View.GONE);
                    Log.d("Main",response.body().getMessage());
                    Toast.makeText(BookAppointmentActivity.this, response.message(), Toast.LENGTH_SHORT).show();
                } else {

                    try {
                        progressBar.setVisibility(View.GONE);
                        Log.d("Main", "Response code is "   response.code());
                        Log.d("Main", "Error message is "   response.errorBody().string());
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

            }

            @Override
            public void onFailure(Call<ApiResponse> call, Throwable t) {
                progressBar.setVisibility(View.GONE);
                Log.d("Main", "Failure message is "   t.getMessage());
                Toast.makeText(BookAppointmentActivity.this, "Error "   t.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });
    }

CodePudding user response：

You are asking for how to pass parameter in retrofit but in your backend you are accepting query for example -

You are asking for -

https://yourdoman.com/appointment/book/12345

But your spring backend accepting something like this -

https://yourdoman.com/appointment/book?token=12345

so you can solve this issue by either changing in backend or frontend (Android)

I'm showing you both

1. Solve by changing only frontend which is android -

You can can change @Path to @Query like this :

@POST("appointment/book")
Call<ApiResponse> bookAppointment(@Body AppointmentBookingDto 
appointmentBookingDto, @Query("token") String token);

2. Solve by changing only backend (Spring)

Note : I didn't used spring yet but I have noticed this from doc.

Instead of using @RequestParam use @PathVariable something like this :

 @PostMapping("appointment/book/{token}")
 public ResponseEntity<ApiResponse> bookAppointment(@RequestBody AppointmentBookingDto appointmentBookingDto,
 @PathVariable String token) throws DataNotFoundException, ParseException, DataAlreadyExistException {
   return appointmentBookingService.bookAppointment(appointmentBookingDto,token);
}

and make sure you only apply one solution don't change from both