Fix for #548: Expose all OkHttp client timeout settings

src/main/java/com/google/genai/ApiClient.java

@@ -223,6 +223,7 @@ private OkHttpClient createHttpClient(
     builder.connectTimeout(Duration.ofMillis(0));
     builder.readTimeout(Duration.ofMillis(0));
     builder.writeTimeout(Duration.ofMillis(0));
+    builder.callTimeout(Duration.ofMillis(0));
 
     timeout.ifPresent(connectTimeout -> builder.connectTimeout(Duration.ofMillis(connectTimeout)));
 
@@ -232,6 +233,11 @@ private OkHttpClient createHttpClient(
           options.maxConnections().ifPresent(dispatcher::setMaxRequests);
           options.maxConnectionsPerHost().ifPresent(dispatcher::setMaxRequestsPerHost);
           builder.dispatcher(dispatcher);
+
+          // Apply timeout configurations from ClientOptions
+          options.readTimeout().ifPresent(rt -> builder.readTimeout(Duration.ofMillis(rt)));
+          options.writeTimeout().ifPresent(wt -> builder.writeTimeout(Duration.ofMillis(wt)));
+          options.callTimeout().ifPresent(ct -> builder.callTimeout(Duration.ofMillis(ct)));
         });
 
     return builder.build();

src/main/java/com/google/genai/types/ClientOptions.java

@@ -37,6 +37,18 @@ public abstract class ClientOptions extends JsonSerializable {
   @JsonProperty("maxConnectionsPerHost")
   public abstract Optional<Integer> maxConnectionsPerHost();
 
+  /** Read timeout in milliseconds. */
+  @JsonProperty("readTimeout")
+  public abstract Optional<Integer> readTimeout();
+
+  /** Write timeout in milliseconds. */
+  @JsonProperty("writeTimeout")
+  public abstract Optional<Integer> writeTimeout();
+
+  /** Call timeout in milliseconds. */
+  @JsonProperty("callTimeout")
+  public abstract Optional<Integer> callTimeout();
+
   /** Instantiates a builder for ClientOptions. */
   @ExcludeFromGeneratedCoverageReport
   public static Builder builder() {
@@ -71,6 +83,30 @@ private static Builder create() {
     @JsonProperty("maxConnectionsPerHost")
     public abstract Builder maxConnectionsPerHost(Integer maxConnectionsPerHost);
 
+    /**
+     * Setter for readTimeout.
+     *
+     * <p>readTimeout: Read timeout in milliseconds.
+     */
+    @JsonProperty("readTimeout")
+    public abstract Builder readTimeout(Integer readTimeout);
+
+    /**
+     * Setter for writeTimeout.
+     *
+     * <p>writeTimeout: Write timeout in milliseconds.
+     */
+    @JsonProperty("writeTimeout")
+    public abstract Builder writeTimeout(Integer writeTimeout);
+
+    /**
+     * Setter for callTimeout.
+     *
+     * <p>callTimeout: Call timeout in milliseconds.
+     */
+    @JsonProperty("callTimeout")
+    public abstract Builder callTimeout(Integer callTimeout);
+
     public abstract ClientOptions build();
   }
 

src/test/java/com/google/genai/HttpApiClientTest.java

@@ -1013,6 +1013,99 @@ public void testHttpClientMldevDefaultClientOptions() throws Exception {
     assertFalse(client.vertexAI());
   }
 
+  @Test
+  public void testHttpClientMldevWithTimeoutSettings() throws Exception {
+    ClientOptions clientOptions =
+        ClientOptions.builder()
+            .readTimeout(5000)
+            .writeTimeout(10000)
+            .callTimeout(15000)
+            .build();
+    HttpApiClient client =
+        new HttpApiClient(Optional.of(API_KEY), Optional.empty(), Optional.of(clientOptions));
+
+    OkHttpClient httpClient = client.httpClient();
+
+    assertEquals(API_KEY, client.apiKey());
+    assertFalse(client.vertexAI());
+    assertEquals(5000, httpClient.readTimeoutMillis());
+    assertEquals(10000, httpClient.writeTimeoutMillis());
+    assertEquals(15000, httpClient.callTimeoutMillis());
+  }
+
+  @Test
+  public void testHttpClientVertexWithTimeoutSettings() throws Exception {
+    ClientOptions clientOptions =
+        ClientOptions.builder()
+            .readTimeout(3000)
+            .writeTimeout(6000)
+            .callTimeout(9000)
+            .build();
+    HttpApiClient client =
+        new HttpApiClient(
+            Optional.empty(),
+            Optional.of(PROJECT),
+            Optional.of(LOCATION),
+            Optional.of(CREDENTIALS),
+            Optional.empty(),
+            Optional.of(clientOptions));
+
+    OkHttpClient httpClient = client.httpClient();
+
+    assertEquals(PROJECT, client.project());
+    assertEquals(LOCATION, client.location());
+    assertTrue(client.vertexAI());
+    assertEquals(3000, httpClient.readTimeoutMillis());
+    assertEquals(6000, httpClient.writeTimeoutMillis());
+    assertEquals(9000, httpClient.callTimeoutMillis());
+  }
+
+  @Test
+  public void testHttpClientWithPartialTimeoutSettings() throws Exception {
+    ClientOptions clientOptions =
+        ClientOptions.builder()
+            .readTimeout(5000)
+            .build();
+    HttpApiClient client =
+        new HttpApiClient(Optional.of(API_KEY), Optional.empty(), Optional.of(clientOptions));
+
+    OkHttpClient httpClient = client.httpClient();
+
+    assertEquals(API_KEY, client.apiKey());
+    assertFalse(client.vertexAI());
+    assertEquals(5000, httpClient.readTimeoutMillis());
+    // When not set, timeouts should remain at default 0 (no timeout)
+    assertEquals(0, httpClient.writeTimeoutMillis());
+    assertEquals(0, httpClient.callTimeoutMillis());
+  }
+
+  @Test
+  public void testHttpClientWithAllClientOptionsIncludingTimeouts() throws Exception {
+    ClientOptions clientOptions =
+        ClientOptions.builder()
+            .maxConnections(32)
+            .maxConnectionsPerHost(8)
+            .readTimeout(2000)
+            .writeTimeout(4000)
+            .callTimeout(8000)
+            .build();
+    HttpApiClient client =
+        new HttpApiClient(Optional.of(API_KEY), Optional.empty(), Optional.of(clientOptions));
+
+    OkHttpClient httpClient = client.httpClient();
+    Dispatcher dispatcher = httpClient.dispatcher();
+
+    assertEquals(API_KEY, client.apiKey());
+    assertFalse(client.vertexAI());
+    // Test dispatcher settings
+    assertEquals(32, dispatcher.getMaxRequests());
+    assertEquals(8, dispatcher.getMaxRequestsPerHost());
+    // Test timeout settings
+    assertEquals(2000, httpClient.readTimeoutMillis());
+    assertEquals(4000, httpClient.writeTimeoutMillis());
+    assertEquals(8000, httpClient.callTimeoutMillis());
+  }
+
   @Test
   public void testHttpClientWithCustomCredentials() throws Exception {
     HttpApiClient client =