Simple logging interceptor for OkHttp that logs full request headers and response headers + body (useful for use with Retrofit 2 where logging was removed)

OkHttpGzippedLoggingInterceptor.java

if (BuildConfig.DEBUG) {
	httpclient.interceptors().add(new LoggingInterceptor());
}

public class LoggingInterceptor implements Interceptor {
	@Override
	public Response intercept(Chain chain) throws IOException {
		Request request = chain.request();

		long t1 = System.nanoTime();
		Log.d("OkHttp", String.format("--> Sending request %s on %s%n%s", request.url(), chain.connection(), request.headers()));

		Buffer requestBuffer = new Buffer();
		request.body().writeTo(requestBuffer);
		Log.d("OkHttp", requestBuffer.readUtf8());

		Response response = chain.proceed(request);

		long t2 = System.nanoTime();
		Log.d("OkHttp", String.format("<-- Received response for %s in %.1fms%n%s", response.request().url(), (t2 - t1) / 1e6d, response.headers()));

		MediaType contentType = response.body().contentType();
		BufferedSource buffer = Okio.buffer(new GzipSource(response.body().source()));
		String content = buffer.readUtf8();
		Log.d("OkHttp", content);

		ResponseBody wrappedBody = ResponseBody.create(contentType, content);
		return response.newBuilder().removeHeader("Content-Encoding").body(wrappedBody).build();
	}
}

OkHttpLoggingInterceptor.java

if (BuildConfig.DEBUG) {
	httpclient.interceptors().add(new LoggingInterceptor());
}

public class LoggingInterceptor implements Interceptor {
	@Override
	public Response intercept(Chain chain) throws IOException {
		Request request = chain.request();

		long t1 = System.nanoTime();
		Log.d("OkHttp", String.format("--> Sending request %s on %s%n%s", request.url(), chain.connection(), request.headers()));

		Buffer requestBuffer = new Buffer();
		request.body().writeTo(requestBuffer);
		Log.d("OkHttp", requestBuffer.readUtf8());

		Response response = chain.proceed(request);

		long t2 = System.nanoTime();
		Log.d("OkHttp", String.format("<-- Received response for %s in %.1fms%n%s", response.request().url(), (t2 - t1) / 1e6d, response.headers()));

		MediaType contentType = response.body().contentType();
		String content = response.body().string();
		Log.d("OkHttp", content);

		ResponseBody wrappedBody = ResponseBody.create(contentType, content);
		return response.newBuilder().body(wrappedBody).build();
	}
}

Spot on for me @flocsy thank you.

I modify this code with okhttp v4 latest 2023. Please remove non project code, i was pasted without removing my util code.

implementation(platform("com.squareup.okhttp3:okhttp-bom:4.12.0"))
implementation("com.squareup.okhttp3:okhttp")
implementation("com.squareup.okhttp3:okhttp-urlconnection")
implementation("com.squareup.okhttp3:logging-interceptor")

import im3.FileManager;
import okhttp3.*;
import okio.BufferedSink;
import okio.BufferedSource;
import okio.GzipSource;
import okio.Okio;
import org.jetbrains.annotations.NotNull;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Hashtable;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


// source https://gist.github.com/erickok/e371a9e0b9e702ed441d
public static class OkHttpGzippedLoggingInterceptor implements Interceptor {
    /**
     * get log file curl result
     *
     * @param url the url
     */
    public static String getLogFile(URI url) {
        return FileManager.getDir(new File("intercepts", "/" + url.getHost() + "/" + url.getPath()).toString()) + "/http.log";
    }

    public static String getLogFile(String urlstr) throws URISyntaxException {
        URI url = new URI(urlstr);
        return FileManager.getDir(new File("intercepts", "/" + url.getHost() + "/" + url.getPath()).toString()) + "/http.log";
    }

    @Override
    public @NotNull Response intercept(Chain chain) throws IOException {
        Request request = chain.request();

        long t1 = System.nanoTime();
        String reqMsg = String.format("--> Sending request %s %s on %s%n%s", request.method(), request.url(), chain.connection(), request.headers());
        System.out.println(reqMsg);

        BufferedSink requestBuffer = Okio.buffer(Okio.sink(new File(".cache", "okhttp-gzipped.log")));
        //            Buffer requestBuffer = new Buffer();
        RequestBody requestBody = request.body();
        if (requestBody != null) requestBody.writeTo(requestBuffer);
        String reqBody = requestBuffer.getBuffer().readUtf8();
        System.out.println(reqBody + "\n");

        Response response = chain.proceed(request);

        String filePath;
        try {
            URI url = new URI(request.url().toString());
            filePath = getLogFile(url);
        } catch (URISyntaxException e) {
            filePath = "";
        }

        long t2 = System.nanoTime();
        String resMsg = String.format("<-- Received response for %s %s in %.1fms%n%s", response.request().url(), response.protocol().toString().toUpperCase(Locale.ROOT), (t2 - t1) / 1e6 d, response.headers());
        System.out.println(resMsg);

        ResponseBody responseBody = response.body();
        MediaType contentType = null;
        BufferedSource buffer;
        String content = "NO CONTENT IN RESPONSE";
        if (responseBody != null) {
            contentType = responseBody.contentType();
            buffer = Okio.buffer(new GzipSource(responseBody.source()));
            content = buffer.readUtf8();
            System.out.println(content);
        }

        if (!filePath.isEmpty()) {
            FileManager.save(filePath, String.format("%s%n%s%n%s%n%s%n", reqMsg, reqBody, resMsg, content));
        }

        ResponseBody wrappedBody = ResponseBody.create(contentType, content);
        return response.newBuilder().removeHeader("Content-Encoding").body(wrappedBody).build();
    }
}

// source https://gist.github.com/erickok/e371a9e0b9e702ed441d
public static class OkhttpLoggingInterceptor implements Interceptor {
    @Override
    public @NotNull Response intercept(Chain chain) throws IOException {
        Request request = chain.request();

        long t1 = System.nanoTime();
        String reqMsg = String.format("--> Sending request %s %s on %s%n%s", request.method(), request.url(), chain.connection(), request.headers());
        System.out.println(reqMsg);

        BufferedSink requestBuffer = Okio.buffer(Okio.sink(new File(".cache", "okhttp-gzipped.log")));
        //            Buffer requestBuffer = new Buffer();
        RequestBody requestBody = request.body();
        if (requestBody != null) requestBody.writeTo(requestBuffer);
        String reqBody = requestBuffer.getBuffer().readUtf8();
        System.out.println(reqBody + "\n");

        Response response = chain.proceed(request);

        String filePath;
        try {
            URI url = new URI(request.url().toString());
            filePath = OkHttpGzippedLoggingInterceptor.getLogFile(url);
        } catch (URISyntaxException e) {
            filePath = "";
        }

        long t2 = System.nanoTime();
        String resMsg = String.format("<-- Received response for %s %s in %.1fms%n%s", response.request().url(), response.protocol().toString().toUpperCase(Locale.ROOT), (t2 - t1) / 1e6 d, response.headers());
        System.out.println(resMsg);

        ResponseBody responseBody = response.body();
        MediaType contentType = null;
        String content = "NO CONTENT IN RESPONSE";
        if (responseBody != null) {
            contentType = responseBody.contentType();
            content = responseBody.string();
            System.out.println(content);
        }

        if (!filePath.isEmpty()) {
            FileManager.save(filePath, String.format("%s%n%s%n%s%n%s%n", reqMsg, reqBody, resMsg, content));
        }

        ResponseBody wrappedBody = ResponseBody.create(contentType, content);
        return response.newBuilder().removeHeader("Content-Encoding").body(wrappedBody).build();
    }
}

the log result in file and console