feat: Getリクエストも署名できるように

src/main/kotlin/dev/usbharu/hideout/plugins/ActivityPub.kt

@@ -44,6 +44,13 @@ suspend fun HttpClient.postAp(urlString: String, username: String, jsonLd: JsonL
     }
 }
 
+suspend fun HttpClient.getAp(urlString: String,username: String):HttpResponse {
+    return this.get(urlString){
+        header("Accept",ContentType.Application.Activity)
+        header("Signature","keyId=\"$username\",algorithm=\"#rsa-sha\",headers=\"(request-target) digest date\"")
+    }
+}
+
 class HttpSignaturePluginConfig {
     lateinit var keyMap: KeyMap
 }

src/main/kotlin/dev/usbharu/hideout/service/activitypub/ActivityPubFollowServiceImpl.kt

@@ -32,9 +32,9 @@ class ActivityPubFollowServiceImpl(
 
     override suspend fun receiveFollowJob(props: JobProps<ReceiveFollowJob>) {
         val actor = props[ReceiveFollowJob.actor]
-        val person = activityPubUserService.fetchPerson(actor)
-        val follow = Config.configData.objectMapper.readValue<Follow>(props[ReceiveFollowJob.follow])
         val targetActor = props[ReceiveFollowJob.targetActor]
+        val person = activityPubUserService.fetchPerson(actor,targetActor)
+        val follow = Config.configData.objectMapper.readValue<Follow>(props[ReceiveFollowJob.follow])
         httpClient.postAp(
             urlString = person.inbox ?: throw IllegalArgumentException("inbox is not found"),
             username = "$targetActor#pubkey",

src/main/kotlin/dev/usbharu/hideout/service/activitypub/ActivityPubUserService.kt

@@ -5,5 +5,5 @@ import dev.usbharu.hideout.domain.model.ap.Person
 interface ActivityPubUserService {
     suspend fun getPersonByName(name:String): Person
 
-    suspend fun fetchPerson(url:String): Person
+    suspend fun fetchPerson(url: String, targetActor: String? = null): Person
 }

src/main/kotlin/dev/usbharu/hideout/service/activitypub/ActivityPubUserServiceImpl.kt

@@ -8,6 +8,7 @@ import dev.usbharu.hideout.domain.model.ap.Person
 import dev.usbharu.hideout.domain.model.hideout.dto.RemoteUserCreateDto
 import dev.usbharu.hideout.exception.UserNotFoundException
 import dev.usbharu.hideout.exception.ap.IllegalActivityPubObjectException
+import dev.usbharu.hideout.plugins.getAp
 import dev.usbharu.hideout.service.impl.IUserService
 import dev.usbharu.hideout.util.HttpUtil.Activity
 import io.ktor.client.*
@@ -52,7 +53,7 @@ class ActivityPubUserServiceImpl(
         )
     }
 
-    override suspend fun fetchPerson(url: String): Person {
+    override suspend fun fetchPerson(url: String, targetActor: String?): Person {
         return try {
             val userEntity = userService.findByUrl(url)
             return Person(
@@ -80,9 +81,13 @@ class ActivityPubUserServiceImpl(
             )
 
         } catch (e: UserNotFoundException) {
-            val httpResponse = httpClient.get(url) {
+            val httpResponse = if (targetActor != null) {
+                httpClient.getAp(url,"$targetActor#pubkey")
+            }else {
+                httpClient.get(url) {
                     accept(ContentType.Application.Activity)
                 }
+            }
             val person = Config.configData.objectMapper.readValue<Person>(httpResponse.bodyAsText())
 
             userService.createRemoteUser(

src/test/kotlin/dev/usbharu/hideout/service/activitypub/ActivityPubFollowServiceImplTest.kt

@@ -85,7 +85,7 @@ class ActivityPubFollowServiceImplTest {
 
         )
         val activityPubUserService = mock<ActivityPubUserService> {
-            onBlocking { fetchPerson(anyString()) } doReturn person
+            onBlocking { fetchPerson(anyString(), any()) } doReturn person
         }
         val userService = mock<IUserService> {
             onBlocking { findByUrls(any()) } doReturn listOf(