Add ByteBufBodyHandler

Allows a response from HttpClient to be efficiently read into a ByteBuf.

Signed-off-by: Graham <gpe@openrs2.org>
Graham 3 years ago
parent 21ed41c307
commit 1101f6e885
  1. 47
      buffer/src/main/kotlin/org/openrs2/buffer/ByteBufBodyHandler.kt

@ -0,0 +1,47 @@
package org.openrs2.buffer
import io.netty.buffer.ByteBuf
import io.netty.buffer.ByteBufAllocator
import io.netty.buffer.Unpooled
import java.net.http.HttpResponse
import java.nio.ByteBuffer
import java.util.concurrent.CompletableFuture
import java.util.concurrent.CompletionStage
import java.util.concurrent.Flow
import javax.inject.Inject
import javax.inject.Singleton
@Singleton
public class ByteBufBodyHandler @Inject constructor(
private val alloc: ByteBufAllocator = ByteBufAllocator.DEFAULT
) : HttpResponse.BodyHandler<ByteBuf> {
override fun apply(responseInfo: HttpResponse.ResponseInfo): HttpResponse.BodySubscriber<ByteBuf> {
return object : HttpResponse.BodySubscriber<ByteBuf> {
private val buf = alloc.compositeBuffer()
private val future = CompletableFuture<ByteBuf>()
override fun onSubscribe(subscription: Flow.Subscription) {
subscription.request(Long.MAX_VALUE)
}
override fun onNext(item: MutableList<ByteBuffer>) {
for (b in item) {
buf.addComponent(Unpooled.wrappedBuffer(b))
}
}
override fun onError(throwable: Throwable) {
future.completeExceptionally(throwable)
buf.release()
}
override fun onComplete() {
future.complete(buf)
}
override fun getBody(): CompletionStage<ByteBuf> {
return future
}
}
}
}
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