chore: added Default fetch service

gradle/libs.versions.toml

@@ -56,6 +56,7 @@ ktor-client-mock-js = { module = "io.ktor:ktor-client-mock-js", version.ref = "k
 ktor-client-cio = { module = "io.ktor:ktor-client-cio", version.ref = "ktor" }
 ktor-client-cio-jvm = { module = "io.ktor:ktor-client-cio-jvm", version.ref = "ktor" }
 ktor-client-js = { module = "io.ktor:ktor-client-js", version.ref = "ktor" }
+ktor-client-java = { module = "io.ktor:ktor-client-java", version.ref = "ktor" }
 
 kotlin-reflect = { module = "org.jetbrains.kotlin:kotlin-reflect" }
 springboot-actuator = { group = "org.springframework.boot", name = "spring-boot-starter-actuator" }

modules/openid-federation-client/build.gradle.kts

@@ -68,7 +68,7 @@ kotlin {
 
         val jvmMain by getting {
             dependencies {
-                implementation(libs.ktor.client.cio)
+                implementation(libs.ktor.client.java)
                 implementation(libs.nimbus.jose.jwt)
             }
         }

modules/openid-federation-client/src/jsMain/kotlin/com/sphereon/oid/fed/client/fetch/Fetch.js.kt

@@ -3,6 +3,11 @@ package com.sphereon.oid.fed.client.fetch
 import com.sphereon.oid.fed.client.crypto.AbstractCryptoService
 import com.sphereon.oid.fed.client.service.DefaultCallbacks
 import io.ktor.client.HttpClient
+import io.ktor.client.call.body
+import io.ktor.client.engine.js.Js
+import io.ktor.client.request.get
+import io.ktor.http.HttpHeaders
+import io.ktor.http.headers
 import kotlinx.coroutines.CoroutineName
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.asPromise
@@ -70,3 +75,25 @@ actual fun fetchService(platformCallback: IFetchCallbackMarkerType): IFetchServi
 
 @JsExport
 actual external interface IFetchCallbackMarkerType
+
+@JsExport
+class DefaultFetchJSImpl : IFetchCallbackServiceJS {
+
+    private val FETCH_SERVICE_JS_SCOPE = "FetchServiceJS"
+
+    override fun getHttpClient(): Promise<HttpClient> {
+        return CoroutineScope(context = CoroutineName(FETCH_SERVICE_JS_SCOPE)).async {
+            return@async HttpClient(Js)
+        }.asPromise()
+    }
+
+    override fun fetchStatement(endpoint: String): Promise<String> {
+        return CoroutineScope(context = CoroutineName(FETCH_SERVICE_JS_SCOPE)).async {
+            return@async getHttpClient().await().get(endpoint) {
+                headers {
+                    append(HttpHeaders.Accept, "application/entity-statement+jwt")
+                }
+            }.body() as String
+        }.asPromise()
+    }
+}

modules/openid-federation-client/src/jvmMain/kotlin/com/sphereon/oid/fed/client/fetch/Fetch.jvm.kt

@@ -1,5 +1,12 @@
 package com.sphereon.oid.fed.client.fetch
 
+import io.ktor.client.HttpClient
+import io.ktor.client.call.body
+import io.ktor.client.engine.java.*
+import io.ktor.client.request.get
+import io.ktor.http.HttpHeaders
+import io.ktor.http.headers
+
 actual fun fetchService(platformCallback: IFetchCallbackMarkerType): IFetchService {
     if (platformCallback !is IFetchCallbackService) {
         throw IllegalArgumentException("Platform callback is not of type IFetchCallbackService, but ${platformCallback.javaClass.canonicalName}")
@@ -8,3 +15,17 @@ actual fun fetchService(platformCallback: IFetchCallbackMarkerType): IFetchServi
 }
 
 actual interface IFetchCallbackMarkerType
+
+class DefaultFetchJvmImpl : IFetchCallbackService {
+    override suspend fun fetchStatement(endpoint: String): String {
+        return getHttpClient().get(endpoint) {
+            headers {
+                append(HttpHeaders.Accept, "application/entity-statement+jwt")
+            }
+        }.body() as String
+    }
+
+    override suspend fun getHttpClient(): HttpClient {
+        return HttpClient(Java)
+    }
+}