feat(client): add logging when debug env is set

README.md

@@ -328,6 +328,22 @@ get a map of untyped fields of type `Map<String, JsonValue>`. You can then acces
 `._additionalProperties().get("secret_prop").asString()` or use other helpers defined on the `JsonValue` class
 to extract it to a desired type.
 
+## Logging
+
+We use the standard [OkHttp logging interceptor](https://github.com/square/okhttp/tree/master/okhttp-logging-interceptor).
+
+You can enable logging by setting the environment variable `OPENAI_LOG` to `info`.
+
+```sh
+$ export OPENAI_LOG=info
+```
+
+Or to `debug` for more verbose logging.
+
+```sh
+$ export OPENAI_LOG=debug
+```
+
 ## Semantic versioning
 
 This package generally follows [SemVer](https://semver.org/spec/v2.0.0.html) conventions, though certain backwards-incompatible changes may be released as minor versions:

openai-java-client-okhttp/build.gradle.kts

@@ -7,6 +7,7 @@ dependencies {
     api(project(":openai-java-core"))
 
     implementation("com.squareup.okhttp3:okhttp:4.12.0")
+    implementation("com.squareup.okhttp3:logging-interceptor:4.12.0")
 
     testImplementation(kotlin("test"))
     testImplementation("org.assertj:assertj-core:3.25.3")

openai-java-client-okhttp/src/main/kotlin/com/openai/client/okhttp/OkHttpClient.kt

@@ -23,21 +23,38 @@ import okhttp3.Request
 import okhttp3.RequestBody
 import okhttp3.RequestBody.Companion.toRequestBody
 import okhttp3.Response
+import okhttp3.logging.HttpLoggingInterceptor
 import okio.BufferedSink
 
 class OkHttpClient
 private constructor(private val okHttpClient: okhttp3.OkHttpClient, private val baseUrl: HttpUrl) :
     HttpClient {
 
     private fun getClient(requestOptions: RequestOptions): okhttp3.OkHttpClient {
-        val timeout = requestOptions.timeout ?: return okHttpClient
-        return okHttpClient
-            .newBuilder()
-            .connectTimeout(timeout)
-            .readTimeout(timeout)
-            .writeTimeout(timeout)
-            .callTimeout(if (timeout.seconds == 0L) timeout else timeout.plusSeconds(30))
-            .build()
+        val clientBuilder = okHttpClient.newBuilder()
+
+        val logLevel =
+            when (System.getenv("OPENAI_LOG")?.lowercase()) {
+                "info" -> HttpLoggingInterceptor.Level.BASIC
+                "debug" -> HttpLoggingInterceptor.Level.BODY
+                else -> null
+            }
+        if (logLevel != null) {
+            clientBuilder.addNetworkInterceptor(
+                HttpLoggingInterceptor().setLevel(logLevel).apply { redactHeader("Authorization") }
+            )
+        }
+
+        val timeout = requestOptions.timeout
+        if (timeout != null) {
+            clientBuilder
+                .connectTimeout(timeout)
+                .readTimeout(timeout)
+                .writeTimeout(timeout)
+                .callTimeout(if (timeout.seconds == 0L) timeout else timeout.plusSeconds(30))
+        }
+
+        return clientBuilder.build()
     }
 
     override fun execute(