Retrofit2/OkHttp3 Cookies (Drag and Drop, One Size Fits 99%)

AddCookiesInterceptor.java

// Original written by tsuharesu
// Adapted to create a "drop it in and watch it work" approach by Nikhil Jha.
// Just add your package statement and drop it in the folder with all your other classes.

import android.content.Context;
import android.preference.PreferenceManager;
import android.util.Log;

import java.io.IOException;
import java.util.HashSet;

import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;

/**
 * This interceptor put all the Cookies in Preferences in the Request.
 * Your implementation on how to get the Preferences may ary, but this will work 99% of the time.
 */
public class AddCookiesInterceptor implements Interceptor {
    public static final String PREF_COOKIES = "PREF_COOKIES";
    // We're storing our stuff in a database made just for cookies called PREF_COOKIES.
    // I reccomend you do this, and don't change this default value.
    private Context context;

    public AddCookiesInterceptor(Context context) {
        this.context = context;
    }

    @Override
    public Response intercept(Interceptor.Chain chain) throws IOException {
        Request.Builder builder = chain.request().newBuilder();

        HashSet<String> preferences = (HashSet<String>) PreferenceManager.getDefaultSharedPreferences(context).getStringSet(PREF_COOKIES, new HashSet<String>());
        
        // Use the following if you need everything in one line.
        // Some APIs die if you do it differently.
        /*String cookiestring = "";
        for (String cookie : preferences) {
            String[] parser = cookie.split(";");
            cookiestring = cookiestring + parser[0] + "; ";
        }
        builder.addHeader("Cookie", cookiestring);
        */
        
        for (String cookie : preferences) {
          builder.addHeader("Cookie", cookie);
        }

        return chain.proceed(builder.build());
    }
}

RecievedCookiesInterceptor.java

// Original written by tsuharesu
// Adapted to create a "drop it in and watch it work" approach by Nikhil Jha.
// Just add your package statement and drop it in the folder with all your other classes.

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

import java.io.IOException;
import java.util.HashSet;

import okhttp3.Interceptor;
import okhttp3.Response;

public class ReceivedCookiesInterceptor implements Interceptor {
    private Context context;
    public ReceivedCookiesInterceptor(Context context) {
        this.context = context;
    } // AddCookiesInterceptor()
    @Override
    public Response intercept(Chain chain) throws IOException {
        Response originalResponse = chain.proceed(chain.request());

        if (!originalResponse.headers("Set-Cookie").isEmpty()) {
            HashSet<String> cookies = (HashSet<String>) PreferenceManager.getDefaultSharedPreferences(context).getStringSet("PREF_COOKIES", new HashSet<String>());

            for (String header : originalResponse.headers("Set-Cookie")) {
                cookies.add(header);
            }

            SharedPreferences.Editor memes = PreferenceManager.getDefaultSharedPreferences(context).edit();
            memes.putStringSet("PREF_COOKIES", cookies).apply();
            memes.commit();
        }

        return originalResponse;
    }
}

UsageSample.java

// By Nikhil Jha
// License MIT

// DON'T ADD THIS FILE TO YOUR OTHER CLASSES
// THIS IS AN EXAMPLE TO TEACH YOU HOW TO MAKE REQUESTS WITH THE MAGIC COOKIES

        OkHttpClient client = new OkHttpClient();
        OkHttpClient.Builder builder = new OkHttpClient.Builder();

        builder.addInterceptor(new AddCookiesInterceptor(context)); // VERY VERY IMPORTANT
        builder.addInterceptor(new ReceivedCookiesInterceptor(context)); // VERY VERY IMPORTANT
        client = builder.build();

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("my-base") // REQUIRED
                .client(client) // VERY VERY IMPORTANT
                .addConverterFactory(GsonConverterFactory.create())
                .build(); // REQUIRED

        Your.ThingyClass = retrofit.create(Your.ThingyClass.class);

        Call<...> call = yourclass.somecall(new yourclass(example, example));

yo bro thanks ,,, its working, you saved my ass :D

Great help. Thanks

I'm using hilt and am struggling to make 'context' available. Any suggestions?

I got it. My problem was trying to use @ApplicationContext as is (@ApplicationContext context: ApplicationContext). It works fine if you leave it as Context (@ApplicationContext context: Context)

I've pulled everything together for a Hilt-based solution at https://stackoverflow.com/questions/67950681/using-cookies-with-retrofit-and-hilt-and-recommended-architecture