*   }
 * ```
 */
fun interface Interceptor {
  @Throws(IOException::class)
  fun intercept(chain: Chain): Response

  companion object {
    /**
     * Constructs an interceptor for a lambda. This compact syntax is most useful for inline
     * interceptors.
     *
     * ```kotlin
     * val interceptor = Interceptor { chain: Interceptor.Chain ->
     *     chain.proceed(chain.request())
     * }

	public fun intercept (Lokhttp3/Interceptor$Chain;)Lokhttp3/Response;
	public final fun level (Lokhttp3/logging/HttpLoggingInterceptor$Level;)V
	public final fun redactHeader (Ljava/lang/String;)V
	public final fun redactQueryParams ([Ljava/lang/String;)V
	public final fun setLevel (Lokhttp3/logging/HttpLoggingInterceptor$Level;)Lokhttp3/logging/HttpLoggingInterceptor;
}

![Interceptors Diagram](../assets/images/interceptors@2x.png)

### Application Interceptors

Interceptors are registered as either _application_ or _network_ interceptors. We'll use the `LoggingInterceptor` defined above to show the difference.

Register an _application_ interceptor by calling `addInterceptor()` on `OkHttpClient.Builder`:

    // Call the next interceptor in the chain.
    val next = copy(index = index + 1, request = request)
    val interceptor = interceptors[index]

    @Suppress("USELESS_ELVIS")
    val response =
      interceptor.intercept(next) ?: throw NullPointerException(
        "interceptor $interceptor returned null",
      )

    if (exchange != null) {
      check(index + 1 >= interceptors.size || next.calls == 1) {

import java.net.ProtocolException
import okhttp3.Interceptor
import okhttp3.Response
import okhttp3.internal.connection.Exchange
import okhttp3.internal.http2.ConnectionShutdownException
import okhttp3.internal.stripBody
import okio.buffer

/** This is the last interceptor in the chain. It makes a network call to the server. */
class CallServerInterceptor(private val forWebSocket: Boolean) : Interceptor {
  @Throws(IOException::class)

 */
package okhttp3.brotli

import okhttp3.Interceptor
import okhttp3.Response
import okhttp3.brotli.internal.uncompress

/**
 * Transparent Brotli response support.
 *
 * Adds Accept-Encoding: br to request and checks (and strips) for Content-Encoding: br in
 * responses.  n.b. this replaces the transparent gzip compression in BridgeInterceptor.
 */
object BrotliInterceptor : Interceptor {

        .build();

    Response response = client.newCall(request).execute();
    response.body().close();
  }

  private static class LoggingInterceptor implements Interceptor {
    @Override public Response intercept(Chain chain) throws IOException {
      long t1 = System.nanoTime();
      Request request = chain.request();
      logger.info(String.format("Sending request %s on %s%n%s",

Logging Interceptor
===================

An [OkHttp interceptor][interceptors] which logs HTTP request and response data.

```java
HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
logging.setLevel(Level.BASIC);
OkHttpClient client = new OkHttpClient.Builder()
  .addInterceptor(logging)
  .build();
```

You can change the log level at any time by calling `setLevel()`.

import java.io.IOException
import okhttp3.Interceptor
import okhttp3.Response
import okhttp3.internal.http.RealInterceptorChain

/**
 * Opens a connection to the target server and proceeds to the next interceptor. The network might
 * be used for the returned response, or to validate a cached response with a conditional GET.
 */
object ConnectInterceptor : Interceptor {
  @Throws(IOException::class)

# Module okhttp-logging-interceptor