Retrofit 2.x : Log Header for request and response

Question

I am using retrofit 2.x and i want to log the header and body of request and response .

  HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
            


        

Answer 1

Oh I found the error if anyone is interested :

 HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder()
        .addInterceptor(interceptor)
        .addInterceptor(REWRITE_CACHE_CONTROL_INTERCEPTOR)
        .addInterceptor(new Interceptor() {
            @Override
            public okhttp3.Response intercept(Chain chain) throws IOException {
                Request request = chain.request().newBuilder()
                        .addHeader("key", "value")
                        .addHeader("HEADER","HEADER Value")
                        .build();
                return chain.proceed(request);
            }


        }).build();

You must add the log interceptor (your interceptor variable) after the request interceptor, so the correct answer is:

 HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder()
.addInterceptor(new Interceptor() {
            @Override
            public okhttp3.Response intercept(Chain chain) throws 
 IOException {
                Request request = chain.request().newBuilder()
                        .addHeader("key", "value")
                        .addHeader("HEADER","HEADER Value")
                        .build();
                return chain.proceed(request);
            }


        })
        .addInterceptor(interceptor)
        .addInterceptor(REWRITE_CACHE_CONTROL_INTERCEPTOR)
        .build();

Answer 2

May it help someone ...

HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.HEADERS);
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

Add both to see complete logs and add this interceptor at the last (don't know why but its like this).

Answer 3

You need to set following:

   OkHttpClient.Builder clientBuilder = new OkHttpClient.Builder();
   HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
   httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.HEADERS);
   clientBuilder.addNetworkInterceptor(httpLoggingInterceptor);
   clientBuilder.build()

Answer 4

The following link was very useful: https://medium.com/swlh/okhttp-interceptors-with-retrofit-2dcc322cc3f3

OkHttpClient.Builder httpBuilder = new OkHttpClient.Builder();

//Gson Builder
GsonBuilder gsonBuilder = new GsonBuilder();
Gson gson = gsonBuilder.create();
Timber.plant(new Timber.DebugTree());

// HttpLoggingInterceptor
HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(message -> Timber.i(message));
httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);


/**
 * injection of interceptors to handle encryption and decryption
 */

//Encryption Interceptor
EncryptionInterceptor encryptionInterceptor = new EncryptionInterceptor(new EncryptionImpl());
//Decryption Interceptor
DecryptionInterceptor decryptionInterceptor = new DecryptionInterceptor(new DecryptionImpl());


// OkHttpClient. Be conscious with the order
OkHttpClient okHttpClient = new OkHttpClient()
    .newBuilder()
    //httpLogging interceptor for logging network requests
    .addInterceptor(httpLoggingInterceptor)
    //Encryption interceptor for encryption of request data
    .addInterceptor(encryptionInterceptor)
    // interceptor for decryption of request data
    .addInterceptor(decryptionInterceptor)
    .build();

//Retrofit
Retrofit retrofit = new Retrofit.Builder()
    .client(okHttpClient)
    .baseUrl(BASE_URL)
    // for serialization
    .addConverterFactory(GsonConverterFactory.create(gson))
    .build();

//ApiService
apiService = retrofit.create(ApiService.class);

Answer 5

Instead of using addInterceptor to add the logging interceptor, use addNetworkInterceptor, to include headers added by OkHttp.

Network interceptors are able to:

Observe the data just as it will be transmitted over the network.