How to retrieve cookies in Retrofit?

Question

I read about request interceptors and what not but no clue how to really use them to obtain cookies... I am sending the cookie like so from nodejs...

res.coo         


        

Answer 1

Simple solution using lib. compile 'com.squareup.okhttp3:okhttp-urlconnection:3.2.0'.

JavaNetCookieJar jncj = new JavaNetCookieJar(CookieHandler.getDefault()); OkHttpClient.Builder().cookieJar(jncj).build();

Answer 2

@Rafolos Your answer saved me, it's perfect and clean. You just have to make sure to use the same interceptor object for all your following requests, otherwise if you instantiate a new CookiesInterceptor for each call, the cookie will be null.

I have a RetrofitProvider object with this property:

private val cookiesInterceptor: CookiesInterceptor by lazy {
    CookiesInterceptor()
}

Then I use it like this:

private fun provideOkHttpClient(): OkHttpClient {
    val httpClient = OkHttpClient.Builder()

    httpClient.addInterceptor(this.cookiesInterceptor)
    // add some other interceptors

    return httpClient.build()
}

and it works like a charm. Thank you!

Answer 3

I had similar situation in my app. This solution works for me to retrieve cookies using Retrofit. MyCookieManager.java

import java.io.IOException;
import java.net.CookieManager;
import java.net.URI;
import java.util.List;
import java.util.Map;

class MyCookieManager extends CookieManager {

    @Override
    public void put(URI uri, Map<String, List<String>> stringListMap) throws IOException {
        super.put(uri, stringListMap);
        if (stringListMap != null && stringListMap.get("Set-Cookie") != null)
            for (String string : stringListMap.get("Set-Cookie")) {
                if (string.contains("userid")) {
                    //save your cookie here
                }
            }
    }
}

Here is how to set your cookie for future requests using RequestInterceptor:

 MyCookieManager myCookieManager = new MyCookieManager();
            CookieHandler.setDefault(myCookieManager);
 private static final RestAdapter REST_ADAPTER = new RestAdapter.Builder()
            .setEndpoint(API_URL)
            .setLogLevel(RestAdapter.LogLevel.FULL)
                    .setRequestInterceptor(new RequestInterceptor() {
                        @Override
                        public void intercept(RequestFacade requestFacade) {
                            String userId = ;//get your saved userid here
                            if (userId != null)
                                requestFacade.addHeader("Cookie", userId);
                        }
                    })
            .build();

Answer 4

I created interceptor in Kotlin to retreive cookie (filter out the cookie for only http) and send in header in every request until user logout (and use clearCookie() method)

class CookiesInterceptor: Interceptor {

    companion object {
        const val COOKIE_KEY = "Cookie"
        const val SET_COOKIE_KEY = "Set-Cookie"
    }

    fun clearCookie() {
        cookie = null
    }

    private var cookie: String? = null

    override fun intercept(chain: Interceptor.Chain): Response {
        val request = chain.request()
        val requestBuilder = request.newBuilder()
        cookie?.let { requestBuilder.addHeader(COOKIE_KEY, it) }

        val response = chain.proceed(requestBuilder.build())
        response.headers()
                .toMultimap()[SET_COOKIE_KEY]
                ?.filter { !it.contains("HttpOnly") }
                ?.getOrNull(0)
                ?.also {
                    cookie = it
                }

        return response
    }

}