import okio.BufferedSource;
import okio.ForwardingSource;
import okio.Okio;
import okio.Source;

public final class Progress {

  public void run() throws Exception {
    Request request = new Request.Builder()
        .url("https://publicobject.com/helloworld.txt")
        .build();

    final ProgressListener progressListener = new ProgressListener() {
      boolean firstUpdate = true;

    return response.body().string();
  }
}
```


Post to a Server
----------------

This program posts data to a service. [Full source][post_example].

```java
public static final MediaType JSON = MediaType.get("application/json");

OkHttpClient client = new OkHttpClient();

String post(String url, String json) throws IOException {
  RequestBody body = RequestBody.create(json, JSON);

import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class OkHttpContributors {
  private static final String ENDPOINT = "https://api.github.com/repos/square/okhttp/contributors";
  private static final Moshi MOSHI = new Moshi.Builder().build();
  private static final JsonAdapter<List<Contributor>> CONTRIBUTORS_JSON_ADAPTER = MOSHI.adapter(
      Types.newParameterizedType(List.class, Contributor.class));

public final class okhttp3/brotli/BrotliInterceptor : okhttp3/Interceptor {
	public static final field INSTANCE Lokhttp3/brotli/BrotliInterceptor;
	public fun intercept (Lokhttp3/Interceptor$Chain;)Lokhttp3/Response;

import okhttp3.Cache;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public final class RewriteResponseCacheControl {
  /** Dangerous interceptor that rewrites the server's cache-control header. */
  private static final Interceptor REWRITE_CACHE_CONTROL_INTERCEPTOR = chain -> {
    Response originalResponse = chain.proceed(chain.request());
    return originalResponse.newBuilder()

 */
package okhttp3.recipes;

import java.io.IOException;
import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public final class PerCallSettings {
  private final OkHttpClient client = new OkHttpClient();

  public void run() throws Exception {
    Request request = new Request.Builder()

import java.io.IOException;
import okhttp3.WebSocket;
import okhttp3.Response;
import okhttp3.WebSocketListener;

/** A realtime messaging session. */
public final class RtmSession extends WebSocketListener implements Closeable {
  private final SlackApi slackApi;

  /** Guarded by this. */
  private WebSocket webSocket;

  public RtmSession(SlackApi slackApi) {
    this.slackApi = slackApi;
  }

  |I|S|S|S| CODE  |  |A|             |
  |N|V|V|V|       |  |S|             |
  | |1|2|3|       |  |K|             |
  +-+-+-+-+-------+  +-+-------------+
   */

  /** Byte 0 flag for whether this is the final fragment in a message. */
  internal const val B0_FLAG_FIN = 128

  /** Byte 0 reserved flag 1. Must be 0 unless negotiated otherwise. */
  internal const val B0_FLAG_RSV1 = 64

 * limitations under the License.
 */
package okhttp3.guide;

import java.io.IOException;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class GetExample {
  final OkHttpClient client = new OkHttpClient();

  String run(String url) throws IOException {
    Request request = new Request.Builder()
        .url(url)
        .build();

```
class MyTest {
  @Test
  void test(MockWebServer server) {
    ...
  }
}
```

Alternately you may add the [MockWebServer] as a constructor parameter:

```
class MyTest {
  private final MockWebServer server;

  MyTest(MockWebServer server) {
    this.server = server;
  }

  @Test
  void test() {
    ...
  }
}
```

Constructor injection is particularly concise in Kotlin: