Fix various scala3 compile issues

Author: farmdawgnation

core/src/main/scala/as/core.scala

@@ -7,6 +7,7 @@ import org.asynchttpclient.handler.resumable._
 import java.io._
 import java.nio.charset.Charset
 import java.io.Closeable
+import io.netty.handler.codec.http.HttpHeaders
 
 object Response {
   def apply[T](f: asynchttpclient.Response => T) = f
@@ -30,17 +31,20 @@ object Bytes extends (asynchttpclient.Response => Array[Byte]) {
   def apply(r: asynchttpclient.Response) = r.getResponseBodyAsBytes
 }
 
-object File extends {
+abstract class FileApply {
   def apply(file: java.io.File) = {
     val fileHandler = new RandomAccessFile(file, "rw")
 
     val resumableHandler = new ResumableAsyncHandler
         with OkHandler[asynchttpclient.Response]
         with CloseResourcesOnThrowableHandler[asynchttpclient.Response] {
       override lazy val closeable: Seq[Closeable] = Seq(fileHandler)
+      override def onTrailingHeadersReceived(headers: HttpHeaders): asynchttpclient.AsyncHandler.State = super[ResumableAsyncHandler].onTrailingHeadersReceived(headers)
     }
 
     resumableHandler
       .setResumableListener(new ResumableRandomAccessFileListener(fileHandler))
   }
 }
+
+object File extends FileApply

core/src/main/scala/handlers.scala

@@ -5,6 +5,7 @@ import org.asynchttpclient.{
   Response, AsyncCompletionHandler, AsyncHandler,
   HttpResponseStatus
 }
+import io.netty.handler.codec.http.HttpHeaders
 
 /**
  * Builds tuples of (Request, AsyncHandler) for passing to Http#apply.
@@ -28,7 +29,9 @@ class FunctionHandler[T](f: Response => T) extends AsyncCompletionHandler[T] {
 }
 
 class OkFunctionHandler[T](f: Response => T)
-extends FunctionHandler[T](f) with OkHandler[T]
+extends FunctionHandler[T](f) with OkHandler[T] {
+  override def onTrailingHeadersReceived(headers: HttpHeaders): AsyncHandler.State = super[FunctionHandler].onTrailingHeadersReceived(headers)
+}
 
 trait OkHandler[T] extends AsyncHandler[T] {
   abstract override def onStatusReceived(status: HttpResponseStatus) = {

json4sjackson/build.sbt

@@ -4,6 +4,6 @@ description :=
   "Dispatch module providing json4s support"
 
 libraryDependencies ++= Seq(
-  "org.json4s" %% "json4s-jackson" % "3.6.7",
+  "org.json4s" %% "json4s-jackson" % "4.1.0-M6",
   "ws.unfiltered" %% "unfiltered-netty-server" % "0.13.0-M2" % "test"
 )

json4sjackson/src/main/scala/as/json.scala

@@ -6,5 +6,5 @@ import org.asynchttpclient.Response
 
 object Json extends (Response => JValue) {
   def apply(r: Response) =
-    (dispatch.as.String andThen (s => parse(StringInput(s), true)))(r)
+    (dispatch.as.String andThen (s => parse(s, true)))(r)
 }

json4snative/build.sbt

@@ -3,7 +3,7 @@ name := "dispatch-json4s-native"
 description :=
   "Dispatch module providing json4s native support"
 
-val json4sVersion = "3.6.7"
+val json4sVersion = "4.1.0-M6"
 
 libraryDependencies ++= Seq(
   "org.json4s" %% "json4s-core" % json4sVersion,

json4snative/src/main/scala/as/json.scala

@@ -6,5 +6,5 @@ import org.asynchttpclient.Response
 
 object Json extends (Response => JValue) {
   def apply(r: Response) =
-    (dispatch.as.String andThen (s => parse(StringInput(s), true)))(r)
+    (dispatch.as.String andThen (s => parse(s, true)))(r)
 }