[Remanga] Fix errors handling

src/main/kotlin/org/koitharu/kotatsu/parsers/MangaLoaderContext.kt

@@ -91,8 +91,11 @@ abstract class MangaLoaderContext {
 	abstract fun getConfig(source: MangaSource): MangaSourceConfig
 
 	private fun Response.ensureSuccess() = apply {
-		if (!isSuccessful) {
-			val exception = HttpStatusException(message, code, request.url.toString())
+		val exception: Exception? = when (code) { // Catch some error codes, not all
+			in 500..599 -> HttpStatusException(message, code, request.url.toString())
+			else -> null
+		}
+		if (exception != null) {
 			runCatching {
 				close()
 			}.onFailure {

src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt

@@ -5,7 +5,6 @@ import okhttp3.Response
 import org.json.JSONArray
 import org.json.JSONException
 import org.json.JSONObject
-import org.jsoup.HttpStatusException
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaParser
 import org.koitharu.kotatsu.parsers.MangaParserAuthProvider
@@ -113,12 +112,10 @@ internal class RemangaParser(
 		val domain = getDomain()
 		val slug = manga.url.find(regexLastUrlPath)
 			?: throw ParseException("Cannot obtain slug from ${manga.url}")
-		val data = catch401 {
-			context.httpGet(
+		val data = context.httpGet(
 			url = "https://api.$domain/api/titles/$slug/",
 			headers = getApiHeaders(),
-			)
-		}.parseJson()
+		).handle401().parseJson()
 		val content = try {
 			data.getJSONObject("content")
 		} catch (e: JSONException) {
@@ -172,9 +169,9 @@ internal class RemangaParser(
 
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
 		val referer = "https://${getDomain()}/"
-		val content = catch401 {
-			context.httpGet(chapter.url.withDomain(subdomain = "api"), getApiHeaders())
-		}.parseJson()
+		val content = context.httpGet(chapter.url.withDomain(subdomain = "api"), getApiHeaders())
+			.handle401()
+			.parseJson()
 			.getJSONObject("content")
 		val pages = content.optJSONArray("pages")
 		if (pages == null) {
@@ -213,12 +210,10 @@ internal class RemangaParser(
 	}
 
 	override suspend fun getUsername(): String {
-		val jo = catch401 {
-			context.httpGet(
+		val jo = context.httpGet(
 			url = "https://api.${getDomain()}/api/users/current/",
 			headers = getApiHeaders(),
-			)
-		}.parseJson()
+		).handle401().parseJson()
 		return jo.getJSONObject("content").getString("username")
 	}
 
@@ -256,12 +251,10 @@ internal class RemangaParser(
 		val result = ArrayList<JSONObject>(100)
 		var page = 1
 		while (true) {
-			val content = catch401 {
-				context.httpGet(
+			val content = context.httpGet(
 				url = "https://api.$domain/api/titles/chapters/?branch_id=$branchId&page=$page&count=100",
 				headers = getApiHeaders(),
-				)
-			}.parseJson().getJSONArray("content")
+			).handle401().parseJson().getJSONArray("content")
 			val len = content.length()
 			if (len == 0) {
 				break
@@ -275,13 +268,9 @@ internal class RemangaParser(
 		return result
 	}
 
-	private inline fun catch401(block: () -> Response): Response = try {
-		block()
-	} catch (e: HttpStatusException) {
-		if (e.statusCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
+	private fun Response.handle401() = apply {
+		if (code == HttpURLConnection.HTTP_UNAUTHORIZED) {
 			throw AuthRequiredException(source)
-		} else {
-			throw e
 		}
 	}
 }

src/test/kotlin/org/koitharu/kotatsu/parsers/MangaParserTest.kt

@@ -135,7 +135,7 @@ internal class MangaParserTest {
 		for (item in list) {
 			assert(item.url.isNotEmpty())
 			assert(!item.url.isUrlAbsoulte())
-			assert(item.coverUrl.isUrlAbsoulte())
+			assert(item.coverUrl.isUrlAbsoulte()) { "Cover url is not absolute: ${item.coverUrl}" }
 			assert(item.title.isNotEmpty()) { "Title for ${item.publicUrl} is empty" }
 			assert(item.publicUrl.isUrlAbsoulte())
 		}