don't save Local source chapters into disk again!

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Page.kt

@@ -7,6 +7,7 @@ package suwayomi.tachidesk.manga.impl
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+import eu.kanade.tachiyomi.source.LocalSource
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
 import org.jetbrains.exposed.sql.and
@@ -68,6 +69,13 @@ object Page {
             }
         }
 
+        // don't cache images for Local Source
+        if (mangaEntry[MangaTable.sourceReference] == LocalSource.ID) {
+            return CachedImageResponse.getImageResponse {
+                source.fetchImage(tachiyomiPage).awaitSingle()
+            }
+        }
+
         val chapterDir = getChapterDir(mangaId, chapterId)
         File(chapterDir).mkdirs()
         val fileName = getPageName(index, chapterDir) // e.g. 001

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/util/storage/CachedImageResponse.kt

@@ -68,4 +68,22 @@ object CachedImageResponse {
             File(it).delete()
         }
     }
+
+    suspend fun getImageResponse(fetcher: suspend () -> Response): Pair<InputStream, String> {
+        val response = fetcher()
+
+        if (response.code == 200) {
+            val responseBytes = response.body!!.bytes()
+
+            // find image type
+            val imageType = response.headers["content-type"]
+                ?: ImageUtil.findImageType { responseBytes.inputStream() }?.mime
+                ?: "image/jpeg"
+
+            return responseBytes.inputStream() to imageType
+        } else {
+            response.closeQuietly()
+            throw Exception("request error! ${response.code}")
+        }
+    }
 }