proxy_connect_timeout 300;
            
            # To support websocket
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            
            chunked_transfer_encoding off;

            proxy_pass http://console;
        }
    }

                || MODEL_VERSION_4_2_0.equals(modelVersion);
    }

    /**
     * Checks if an upgrade from one version to another is possible.
     *
     * @param fromVersion the source version
     * @param toVersion the target version
     * @return true if the upgrade is possible
     */
    public static boolean canUpgrade(String fromVersion, String toVersion) {

    platform.assumeNotBouncyCastle()

    enableTls(Protocol.HTTP_1_1)
    upgrade()
  }

  @Test
  fun upgradeRefusedByServer() {
    server.enqueue(MockResponse(body = "normal request"))
    val requestWithUpgrade =
      Request
        .Builder()
        .url(server.url("/"))
        .header("Connection", "upgrade")
        .build()
    client.newCall(requestWithUpgrade).execute().use { response ->

* `upgrade`: Upgrades

      }

      val isUpgradeResponse =
        isUpgradeCode &&
          "upgrade".equals(response.header("Connection"), ignoreCase = true)

      response =
        when {
          // This is an HTTP/1 upgrade. (This case includes web socket upgrades.)
          isUpgradeRequest && isUpgradeResponse -> {
            response
              .newBuilder()
              .body(

    coders call this and we don't want their users to suffer.


## Version 4.0.0

_2019-06-26_

**This release upgrades OkHttp to Kotlin.** We tried our best to make fast and safe to upgrade
from OkHttp 3.x. We wrote an [upgrade guide][upgrading_to_okhttp_4] to help with the migration and a
[blog post][okhttp4_blog_post] to explain it.

 *  Fix: Target Java 8 bytecode for Java and Kotlin.

   [Gradle plugin][japicmp_gradle] to enforce binary compatibility.

 * **Java source compatibility** is the ability to upgrade Java uses of OkHttp 3.x to 4.x without
   changing `.java` files.

 * **Kotlin source compatibility** is the ability to upgrade Kotlin uses of OkHttp 3.x to 4.x
   without changing `.kt` files.

With a few small exceptions (below), OkHttp 4.x is both binary- and Java source-compatible with

        TYPE_LABELS.put("feature", "New features");
        TYPE_LABELS.put("new-aggregation", "New aggregation");
        TYPE_LABELS.put("regression", "Regressions");
        TYPE_LABELS.put("upgrade", "Upgrades");
    }

    static void update(File templateFile, File outputFile, Map<QualifiedVersion, Set<ChangelogEntry>> changelogs) throws IOException {
        final String templateString = Files.readString(templateFile.toPath());

        Mockito.verify(context.logger)
                .info(
                        "  -a, --all             Apply all upgrades (equivalent to --model-version 4.1.0 --infer --model --plugins)");
    }

    @Test
    void testHelpIncludesDefaultBehavior() throws Exception {
        UpgradeContext context = createMockContext();

        help.execute(context);

 *  New: Support request bodies on HTTP/1.1 connection upgrades.
 *  New: `EventListener.plus()` makes it easier to observe events in multiple listeners.
 *  Fix: Don't spam logs with _‘Method isLoggable in android.util.Log not mocked.’_ when using
    OkHttp in Robolectric and Paparazzi tests.
 *  Upgrade: [Kotlin 2.2.21][kotlin_2_2_21].
 *  Upgrade: [Okio 3.16.2][okio_3_16_2].