refactor: replace default network client with OkHttp and adjust proxy support setup

- Updated build scripts to use `network-client-okhttp` by default where appropriate.
- Revised README to simplify proxy setup instructions.
- Adjusted integration workflows to correctly configure HTTP client preferences.

Author: ttypic

.github/workflows/integration-test.yml

@@ -8,7 +8,7 @@ on:
       - main
 
 jobs:
-  check-rest:
+  check-rest-httpurlconnection:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -24,15 +24,15 @@ jobs:
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v3
 
-      - run: ./gradlew :java:testRestSuite
+      - run: ./gradlew :java:testRestSuite -PhttpURLConnection
 
       - uses: actions/upload-artifact@v4
         if: always()
         with:
           name: java-build-reports-rest
           path: java/build/reports/
 
-  check-realtime:
+  check-realtime-httpurlconnection:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -48,7 +48,7 @@ jobs:
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v3
 
-      - run: ./gradlew :java:testRealtimeSuite
+      - run: ./gradlew :java:testRealtimeSuite -PhttpURLConnection
 
       - uses: actions/upload-artifact@v4
         if: always()
@@ -71,7 +71,7 @@ jobs:
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v3
 
-      - run: ./gradlew :java:testRestSuite -Pokhttp
+      - run: ./gradlew :java:testRestSuite
 
   check-realtime-okhttp:
     runs-on: ubuntu-latest
@@ -89,7 +89,7 @@ jobs:
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v3
 
-      - run: ./gradlew :java:testRealtimeSuite -Pokhttp
+      - run: ./gradlew :java:testRealtimeSuite
 
   check-liveobjects:
     runs-on: ubuntu-latest

README.md

@@ -134,17 +134,7 @@ You can add proxy support to the Ably Java SDK by configuring `ProxyOptions` in
 <details>
 <summary>Proxy support setup details.</summary>
 
-To enable proxy support for both REST and Realtime clients in the Ably SDK, use the OkHttp library to handle HTTP requests and WebSocket connections.
-
-Add the following dependency to your `build.gradle` file:
-
-```groovy
-dependencies {
-    runtimeOnly("io.ably:network-client-okhttp:1.4.2")
-}
-```
-
-After adding the OkHttp dependency, enable proxy support by specifying proxy settings in the ClientOptions when initializing your Ably client.
+Enable proxy support by specifying proxy settings in the ClientOptions when initializing your Ably client.
 
 The following example sets up a proxy using the Pub/Sub Java SDK:
 

android/build.gradle.kts

@@ -54,14 +54,17 @@ dependencies {
     compileOnly(libs.jetbrains)
     testImplementation(libs.bundles.tests)
     implementation(project(":network-client-core"))
-    runtimeOnly(project(":network-client-default"))
+    runtimeOnly(project(":network-client-okhttp"))
     implementation(libs.firebase.messaging)
     androidTestImplementation(libs.bundles.instrumental.android)
 }
 
 configurations {
     all {
         exclude(group = "org.hamcrest", module = "hamcrest-core")
+        resolutionStrategy {
+            force(libs.jetbrains)
+        }
     }
     getByName("androidTestImplementation") {
         extendsFrom(configurations.getByName("testImplementation"))

java/build.gradle.kts

@@ -22,10 +22,10 @@ dependencies {
     implementation(libs.bundles.common)
     compileOnly(libs.jetbrains)
     implementation(project(":network-client-core"))
-    if (findProperty("okhttp") == null) {
-        runtimeOnly(project(":network-client-default"))
-    } else {
+    if (findProperty("httpURLConnection") == null) {
         runtimeOnly(project(":network-client-okhttp"))
+    } else {
+        runtimeOnly(project(":network-client-default"))
     }
     testImplementation(libs.bundles.tests)
 }

network-client-okhttp/src/main/java/io/ably/lib/network/OkHttpCall.java

@@ -1,7 +1,9 @@
 package io.ably.lib.network;
 
 import okhttp3.Call;
+import okhttp3.MediaType;
 import okhttp3.Response;
+import okhttp3.ResponseBody;
 
 import java.io.IOException;
 import java.net.ConnectException;
@@ -23,11 +25,7 @@ public HttpResponse execute() {
                 .headers(response.headers().toMultimap())
                 .code(response.code())
                 .message(response.message())
-                .body(
-                    response.body() != null && response.body().contentType() != null
-                        ? new HttpBody(response.body().contentType().toString(), response.body().bytes())
-                        : null
-                )
+                .body(buildHttpBody(response))
                 .build();
 
         } catch (ConnectException | SocketTimeoutException | UnknownHostException | NoRouteToHostException fce) {
@@ -42,4 +40,13 @@ public HttpResponse execute() {
     public void cancel() {
         call.cancel();
     }
+
+    private HttpBody buildHttpBody(Response response) throws IOException {
+        try (ResponseBody body = response.body()) {
+            MediaType contentType = body != null ? body.contentType() : null;
+            return contentType != null
+                ? new HttpBody(contentType.toString(), body.bytes())
+                : null;
+        }
+    }
 }