directory context handler

netty-http-server/src/main/java/org/xbib/netty/http/server/context/DirectoryContextHandler.java

@@ -0,0 +1,46 @@
+package org.xbib.netty.http.server.context;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import org.xbib.netty.http.server.transport.ServerRequest;
+import org.xbib.netty.http.server.transport.ServerResponse;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.channels.Channels;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class DirectoryContextHandler implements ContextHandler {
+
+    private Path path;
+
+    private ByteBufAllocator allocator;
+
+    public DirectoryContextHandler(Path path, ByteBufAllocator allocator) {
+        this.path = path;
+        this.allocator = allocator;
+    }
+
+    @Override
+    public void serve(ServerRequest serverRequest, ServerResponse serverResponse) throws IOException {
+        String uri = serverRequest.getRequest().uri();
+        Path p = path.resolve(uri);
+        ByteBuf byteBuf = read(allocator, p);
+        serverResponse.write(200, "application/octet-stream", byteBuf);
+        byteBuf.release();
+    }
+
+
+    public static ByteBuf read(ByteBufAllocator allocator, Path path)
+            throws IOException {
+        try (SeekableByteChannel sbc = Files.newByteChannel(path);
+             InputStream in = Channels.newInputStream(sbc)) {
+            int size = Math.toIntExact(sbc.size());
+            ByteBuf byteBuf = allocator.directBuffer(size, size);
+            byteBuf.writeBytes(in, size);
+            return byteBuf;
+        }
+    }
+}