package cvut.arenaq.mashup.WhoisApi;

import retrofit.Call;
import retrofit.http.GET;
import retrofit.http.Query;

public interface WhoisApiService {
    @GET("api/whois/")
    Call<WhoisWrapper> whois(
            @Query("url") String url);
}

package cvut.arenaq.mashup.WhoisApi;

import retrofit.Call;
import retrofit.http.GET;
import retrofit.http.Query;

public interface WhoisApiService {
    @GET("api/whois")
    Call<WhoisWrapper> whois(
            @Query("url") String url);
}

Fix bug in Whois API service location
Fix bug in Whois API service location

Unnecessary slash after URL. Bug did not present itself (it looks like server omitted slash before query parameters)
