![Events Diagram](../assets/images/******@****.***)

Here’s a [sample event listener](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEventsNonConcurrent.java) that prints each event with a timestamp.

```java

      Platform.get().log("Saving cookies failed for " + url.resolve("/...")!!, WARN, e)
    }
  }

  override fun loadForRequest(url: HttpUrl): List<Cookie> {
    val cookieHeaders =
      try {
        // The RI passes all headers. We don't have 'em, so we don't pass 'em!
        cookieHandler.get(url.toUri(), emptyMap<String, List<String>>())
      } catch (e: IOException) {

s.com webview-assets.cloud9.eu-central-1.amazonaws.com webview-assets.cloud9.eu-north-1.amazonaws.com webview-assets.cloud9.eu-south-1.amazonaws.com webview-assets.cloud9.eu-west-1.amazonaws.com webview-assets.cloud9.eu-west-2.amazonaws.com webview-assets.cloud9.eu-west-3.amazonaws.com webview-assets.cloud9.me-south-1.amazonaws.com webview-assets.cloud9.sa-east-1.amazonaws.com webview-assets.cloud9.us-east-1.amazonaws.com webview-assets.cloud9.us-east-2.amazonaws.com webview-assets.cloud9.us-west-1.amazonaws.com...

Unfortunately it crashes on OkHttp 4.x’s bytecode. Until [Google’s bug][advanced_profiling_bug] is
fixed you must disable advanced profiling in Android Studio.

![Disable Advanced Profiling](../assets/images/******@****.***)


R8 / ProGuard
-------------

R8 and ProGuard are both code optimizers for `.class` files.

webview-assets.cloud9.ap-northeast-3.amazonaws.com
vfs.cloud9.ap-south-1.amazonaws.com
webview-assets.cloud9.ap-south-1.amazonaws.com
vfs.cloud9.ap-southeast-1.amazonaws.com
webview-assets.cloud9.ap-southeast-1.amazonaws.com
vfs.cloud9.ap-southeast-2.amazonaws.com
webview-assets.cloud9.ap-southeast-2.amazonaws.com
vfs.cloud9.ca-central-1.amazonaws.com
webview-assets.cloud9.ca-central-1.amazonaws.com
vfs.cloud9.eu-central-1.amazonaws.com

import org.junit.jupiter.api.extension.ParameterContext
import org.junit.jupiter.api.extension.ParameterResolver

/**
 * Runs MockWebServer for the duration of a single test method.
 *
 * Specifically while junit instances passes into test constructor
 * are typically shares amongst all tests, a fresh instance will be
 * received here. Use with @BeforeAll and @AfterAll, is not supported.
 *
 * There are 3 ids for instances

    assumeNetwork()

    val request =
      Request.Builder().url("https://example_underscore_123.s3.amazonaws.com/").build()

    try {
      client.newCall(request).execute().close()
      // Hopefully this passes
    } catch (ioe: IOException) {
      // https://github.com/square/okhttp/issues/5840
      when (ioe.cause) {
        is IllegalArgumentException -> {
          assertEquals("Android internal error", ioe.message)

site_author: Square, Inc.
remote_branch: gh-pages
edit_uri: ""

copyright: 'Copyright © 2022 Block, Inc.'

theme:
  name: 'material'
  favicon: assets/images/icon-square.png
  logo: assets/images/icon-square.png
  palette:
    - media: "(prefers-color-scheme: light)"
      scheme: default
      primary: teal
      accent: blue
      toggle:
        icon: octicons/sun-24

 * securely. Suppose you're building a webservice that checks that incoming paths are prefixed
 * "/static/images/" before serving the corresponding assets from the filesystem.
 *
 * ```java
 * String attack = "http://example.com/static/images/../../../../../etc/passwd";
 * System.out.println(new URL(attack).getPath());
 * System.out.println(new URI(attack).getPath());

![Interceptors Diagram](../assets/images/******@****.***)

### Application Interceptors

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