Fix JAGGRAB request parsing

The paths aren't prefixed with a slash, unlike HTTP.

Signed-off-by: Graham <gpe@openrs2.org>

game/src/main/kotlin/org/openrs2/game/net/FileProvider.kt

@@ -10,11 +10,7 @@ import javax.inject.Singleton
 @Singleton
 public class FileProvider {
     public fun get(uri: String): FileRegion? {
-        if (!uri.startsWith("/")) {
+        var path = ROOT.resolve(uri).toAbsolutePath().normalize()
-            return null
-        }
-
-        var path = ROOT.resolve(uri.substring(1)).toAbsolutePath().normalize()
         if (!path.startsWith(ROOT)) {
             return null
         }

game/src/main/kotlin/org/openrs2/game/net/http/HttpChannelHandler.kt

@@ -25,7 +25,13 @@ public class HttpChannelHandler @Inject constructor(
     }
 
     override fun channelRead0(ctx: ChannelHandlerContext, msg: HttpRequest) {
-        val file = fileProvider.get(msg.uri())
+        val uri = msg.uri()
+        if (!uri.startsWith("/")) {
+            ctx.write(createResponse(HttpResponseStatus.BAD_REQUEST)).addListener(ChannelFutureListener.CLOSE)
+            return
+        }
+
+        val file = fileProvider.get(uri.substring(1))
         if (file == null) {
             ctx.write(createResponse(HttpResponseStatus.NOT_FOUND)).addListener(ChannelFutureListener.CLOSE)
             return

share/doc/protocol/jaggrab.md

@@ -10,7 +10,7 @@ contains a single opcode byte: `17`.
 
 The loader then writes the following string:
 
-    JAGGRAB /<file name>
+    JAGGRAB <file name>
 
 where `<file name>` is replaced with the name of the file to fetch. The string
 is followed by two line feed characters.