Fix a bunch of stupid edge cases

src/main/kotlin/mdnet/base/ServerManager.kt

@@ -97,7 +97,7 @@ class ServerManager(serverSettings: ServerSettings, devSettings: DevSettings, ma
                 lastBytesSent = statistics.get().bytesSent
 
                 val state = this.state
-                if (state is GracefulStop) {
+                if (state is GracefulStop && state.nextState != Shutdown) {
                     LOGGER.info { "Aborting graceful shutdown started due to hourly bandwidth limit" }
 
                     this.state = state.lastRunning
@@ -164,7 +164,7 @@ class ServerManager(serverSettings: ServerSettings, devSettings: DevSettings, ma
                     }
                 }
             } catch (e: Exception) {
-                LOGGER.warn(e) { "Graceful shutdown checker failed" }
+                LOGGER.warn(e) { "Bandwidth shutdown checker/ping failed" }
             }
         }, 45, 45, TimeUnit.SECONDS)
 

src/main/kotlin/mdnet/base/server/ImageServer.kt

@@ -69,6 +69,7 @@ import org.jetbrains.exposed.sql.Database
 import org.jetbrains.exposed.sql.SchemaUtils
 import org.jetbrains.exposed.sql.transactions.transaction
 import org.slf4j.LoggerFactory
+import java.lang.IllegalArgumentException
 
 private val LOGGER = LoggerFactory.getLogger(ImageServer::class.java)
 
@@ -106,7 +107,12 @@ class ImageServer(
             }
 
             if (tokenized || remoteSettings.forceTokens) {
-                val tokenArr = Base64.getUrlDecoder().decode(Path.of("token")(request))
+                val tokenArr = try {
+                    Base64.getUrlDecoder().decode(Path.of("token")(request))
+                } catch (e: IllegalArgumentException) {
+                    LOGGER.info(e) { "Request for $sanitizedUri rejected for non-base64 token" }
+                    return@then Response(Status.FORBIDDEN).body("Token is invalid base64")
+                }
                 if (tokenArr.size < 24) {
                     LOGGER.info { "Request for $sanitizedUri rejected for invalid token" }
                     return@then Response(Status.FORBIDDEN)
@@ -122,17 +128,17 @@ class ImageServer(
                     )
                 } catch (e: JsonProcessingException) {
                     LOGGER.info(e) { "Request for $sanitizedUri rejected for invalid token" }
-                    return@then Response(Status.FORBIDDEN)
+                    return@then Response(Status.FORBIDDEN).body("Token is invalid")
                 }
 
                 if (OffsetDateTime.now().isAfter(token.expires)) {
                     LOGGER.info { "Request for $sanitizedUri rejected for expired token" }
-                    return@then Response(Status.GONE)
+                    return@then Response(Status.GONE).body("Token has expired")
                 }
 
                 if (token.hash != chapterHash) {
                     LOGGER.info { "Request for $sanitizedUri rejected for inapplicable token" }
-                    return@then Response(Status.FORBIDDEN)
+                    return@then Response(Status.FORBIDDEN).body("Token is inapplicable for the image")
                 }
             }
 
@@ -353,11 +359,11 @@ fun getServer(cache: DiskLruCache, database: Database, remoteSettings: RemoteSet
 
     val imageServer = ImageServer(cache, database, statistics, remoteSettings, client)
 
-    return timeRequest()
+    return addCommonHeaders()
+        .then(timeRequest())
+        .then(setHandled(isHandled))
         .then(catchAllHideDetails())
         .then(ServerFilters.CatchLensFailure)
-        .then(setHandled(isHandled))
-        .then(addCommonHeaders())
         .then(
             routes(
                 "/data/{chapterHash}/{fileName}" bind Method.GET to imageServer.handler(dataSaver = false),