Add customization of HTTP client configuration (#10).

podcastindex-ktor2/src/commonMain/kotlin/com/mr3y/podcastindex/ktor2/PodcastIndexClient.kt

@@ -25,7 +25,7 @@ public fun PodcastIndexClient(
     require(userAgent.isNotBlank()) { "User agent cannot be blank" }
     val config = PodcastIndexClientConfig().apply { block() }
     return PodcastIndexClient(
-        httpClientConfig = {
+        defaultHttpClientConfig = {
             installAuthenticationPlugin(authKey, authSecret, userAgent)
             installRetryPlugin(authKey, authSecret, maxRetries = config.maxRetries)
             installSerializationPlugin()
@@ -36,5 +36,6 @@ public fun PodcastIndexClient(
                 installTimeoutPlugin(config.defaultTimeout)
             }
         },
+        podcastIndexClientConfig = config
     )
 }

podcastindex-ktor3/src/commonMain/kotlin/com/mr3y/podcastindex/ktor3/PodcastIndexClient.kt

@@ -25,7 +25,7 @@ public fun PodcastIndexClient(
     require(userAgent.isNotBlank()) { "User agent cannot be blank" }
     val config = PodcastIndexClientConfig().apply { block() }
     return PodcastIndexClient(
-        httpClientConfig = {
+        defaultHttpClientConfig = {
             installAuthenticationPlugin(authKey, authSecret, userAgent)
             installRetryPlugin(authKey, authSecret, maxRetries = config.maxRetries)
             installSerializationPlugin()
@@ -36,5 +36,6 @@ public fun PodcastIndexClient(
                 installTimeoutPlugin(config.defaultTimeout)
             }
         },
+        podcastIndexClientConfig = config
     )
 }

podcastindex-sdk-base/src/commonMain/kotlin/com/mr3y/podcastindex/PodcastIndexClient.kt

@@ -15,12 +15,11 @@ import io.ktor.client.HttpClientConfig
 public class PodcastIndexClient
 @InternalPodcastIndexApi
 constructor(
-    private val httpClientConfig: HttpClientConfig<*>.() -> Unit,
+    defaultHttpClientConfig: HttpClientConfig<*>.() -> Unit,
+    podcastIndexClientConfig: PodcastIndexClientConfig
 ) {
-
-    private val client: HttpClient = HttpClient(defaultHttpClientEngineFactory()) {
-        httpClientConfig()
-    }
+    private val client: HttpClient =
+        podcastIndexClientConfig.httpClientBuilder().config(defaultHttpClientConfig)
 
     public val podcasts: Podcasts = Podcasts(client)
 

podcastindex-sdk-base/src/commonMain/kotlin/com/mr3y/podcastindex/PodcastIndexClientConfig.kt

@@ -1,5 +1,10 @@
 package com.mr3y.podcastindex
 
+import io.ktor.client.HttpClient
+import io.ktor.client.HttpClientConfig
+import io.ktor.client.engine.HttpClientEngineConfig
+import io.ktor.client.engine.HttpClientEngineFactory
+
 @DslMarker
 @InternalPodcastIndexApi
 public annotation class PodcastIndexConfigDsl
@@ -10,6 +15,9 @@ public annotation class PodcastIndexConfigDsl
 @PodcastIndexConfigDsl
 public class PodcastIndexClientConfig {
 
+    internal var httpClientBuilder: (() -> HttpClient) =
+        { HttpClient(defaultHttpClientEngineFactory()) }
+
     /**
      * Maximum number of retries for failed requests before giving up. Default is 3.
      */
@@ -34,4 +42,20 @@ public class PodcastIndexClientConfig {
      * The default timeout for requests in milliseconds. Default is 10_000.
      */
     public var defaultTimeout: Long = 10_000
+
+    /**
+     * Creates an custom [HttpClient] with the specified [HttpClientEngineFactory] and optional
+     * [block] configuration.
+     *
+     * Note that [block] configuration doesn't replace the existing default configuration added by
+     * this library. It will be applied on top of it.
+     */
+    public fun <T : HttpClientEngineConfig> httpClient(
+        engineFactory: HttpClientEngineFactory<T>,
+        block: HttpClientConfig<T>.() -> Unit = {}
+    ) {
+        httpClientBuilder = {
+            HttpClient(engineFactory, block)
+        }
+    }
 }