Retrofit gets 400 Bad request but works with postman

Question

My api base url is:

https://locodealapi.herokuapp.com/api/deals

In postman pass following in header and it works fine.

x-access-token:eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.5XFJnJqTsfID9uqOwkNf46oraj9jDxic7qNSqBdunD0

In retrofit Interface I have following but get 400 Bad request

@POST("api/deals")
    Call<ResponseBody> deals(@Header("x-access-token") String x_access_token)

Calling code:

Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://locodealapi.herokuapp.com")
                .addConverterFactory(GsonConverterFactory.create())
                .client(httpClient.build())
                .build();
        AppRestAPI client = retrofit.create(AppRestAPI.class);    

        Call<ResponseBody> call1 = client.deals(
                token
        );          

        call1.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                Log.i(TAG, "The response is " + response.message());
                Log.i(TAG, "The response is " + response.body());    

                try {
                    Log.i(TAG, "The response is " + response.errorBody().string());

                    if (response.code() == 400) {
                        Log.v("Error code 400",response.errorBody().string());
                    }

                } catch (IOException e) {
                    e.printStackTrace();
                }    
            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e(TAG, "onFailure: Failed", t);

            }
        });

OKHTTP Log interceptor

11-21 21:14:30.939 3253-3342/? D/OkHttp: --> POST https://locodealapi.herokuapp.com/api/deals
11-21 21:14:30.939 3253-3342/? D/OkHttp: Content-Length: 0
11-21 21:14:30.940 3253-3342/? D/OkHttp: x-access-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyX2lkIjoyNSwidXNlcl9uYW1lIj....
11-21 21:14:30.942 3253-3342/? D/OkHttp: --> END POST (0-byte body)    
11-21 21:14:34.188 3253-3342/? D/OkHttp: <-- 400 Bad Request https://locodealapi.herokuapp.com/api/deals (3246ms)
11-21 21:14:34.189 3253-3342/? D/OkHttp: Connection: close
11-21 21:14:34.189 3253-3342/? D/OkHttp: Server: Cowboy
11-21 21:14:34.189 3253-3342/? D/OkHttp: Date: Tue, 21 Nov 2017 15:29:33 GMT
11-21 21:14:34.190 3253-3342/? D/OkHttp: Content-Length: 0
11-21 21:14:34.191 3253-3342/? D/OkHttp: <-- END HTTP (0-byte body)
11-21 21:14:34.196 3253-3253/? I/BaseDrawerActivity: The response is Bad Request
11-21 21:14:34.196 3253-3253/? I/BaseDrawerActivity: The response is null
11-21 21:14:34.196 3253-3253/? I/BaseDrawerActivity: The response is 

Note: The same code works fine in local nodejs server (http only)

Answer 1

1.Frist thing your api is a GET Method so use @GET instead @POST

Second try to change url base url in retrofit .baseUrl("https://locodealapi.herokuapp.com") to .baseUrl("https://locodealapi.herokuapp.com/") this will work. or leave your problem in comment 2.this is sample code

HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    OkHttpClient okHttpClient = new OkHttpClient.Builder().addInterceptor(
            new Interceptor() {
                @Override
                public Response intercept(Chain chain) throws IOException{
                 Request original = chain.request();
                    // Request customization: add request headers
                    Request.Builder requestBuilder =original.newBuilder().
                            method(original.method(), original.body());
                    Request request = requestBuilder.build();
                    return chain.proceed(request);
                }
            })
            .addInterceptor(interceptor).connectTimeout(60,TimeUnit.SECONDS).readTimeout(60, TimeUnit.SECONDS).build();

    Retrofit retrofit = new Retrofit.Builder().baseUrl("https://locodealapi.herokuapp.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .client(okHttpClient).build();
    UserApi userApi = retrofit.create(UserApi.class);
    Call<ResponseBody> call = userApi.deals("your token");
    call.enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call,retrofit2.Response<ResponseBody> response) {
        }
        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {}
    });
}

@GET("api/deals") Call deals(@Header("x-access-token") String x_access_token);