Initial Commit
This commit is contained in:
CodingPhoenix
@@ -0,0 +1,88 @@
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package dev.coph.nextusweb.server;
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import dev.coph.nextusweb.server.router.Request;
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import dev.coph.nextusweb.server.router.Response;
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import dev.coph.nextusweb.server.router.Router;
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import dev.coph.nextusweb.server.router.exception.BadRequestException;
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import io.netty.buffer.Unpooled;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.SimpleChannelInboundHandler;
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import io.netty.handler.codec.http.*;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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import java.util.stream.Collectors;
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public final class HttpRequestHandler extends SimpleChannelInboundHandler<FullHttpRequest> {
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private static final Executor VT_EXECUTOR =
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Executors.newVirtualThreadPerTaskExecutor();
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private final Router router;
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public HttpRequestHandler(Router router) {
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this.router = router;
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}
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@Override
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protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) {
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req.retain();
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VT_EXECUTOR.execute(() -> {
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try {
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handle(ctx, req);
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} finally {
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req.release();
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}
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});
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}
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private void handle(ChannelHandlerContext ctx, FullHttpRequest raw) {
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String path = new QueryStringDecoder(raw.uri()).path();
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Router.Resolution resolution = router.resolve(raw.method(), path);
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Response res = new Response();
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switch (resolution) {
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case Router.Resolution.Match m -> {
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Request request = new Request(raw, m.pathParams());
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try {
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for (var mw : router.middlewares()) mw.accept(request, res);
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m.handler().handle(request, res);
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} catch (BadRequestException e) {
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res.status(400).json("{\"error\":\"" + e.getMessage() + "\"}");
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} catch (Exception e) {
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res.status(500).text("Internal Server Error: " + e.getMessage());
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}
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}
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case Router.Resolution.MethodNotAllowed mna -> {
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String allow = mna.allowedMethods().stream()
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.map(HttpMethod::name)
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.sorted()
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.collect(Collectors.joining(", "));
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res.status(405)
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.header(HttpHeaderNames.ALLOW.toString(), allow)
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.json("{\"error\":\"Method Not Allowed\",\"allowed\":\"" + allow + "\"}");
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}
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case Router.Resolution.NotFound nf -> res.status(404).json("{\"error\":\"Not Found\"}");
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}
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send(ctx, res);
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}
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private void send(ChannelHandlerContext ctx, Response res) {
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var nettyRes = new DefaultFullHttpResponse(
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HttpVersion.HTTP_1_1,
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HttpResponseStatus.valueOf(res.status()),
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Unpooled.wrappedBuffer(res.body())
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);
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nettyRes.headers().add(res.headers());
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nettyRes.headers().setInt(HttpHeaderNames.CONTENT_LENGTH, res.body().length);
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ctx.writeAndFlush(nettyRes).addListener(ChannelFutureListener.CLOSE);
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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ctx.close();
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}
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}
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@@ -0,0 +1,60 @@
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package dev.coph.nextusweb.server;
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import dev.coph.nextusweb.server.router.Router;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.channel.*;
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import io.netty.channel.epoll.Epoll;
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import io.netty.channel.epoll.EpollIoHandler;
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import io.netty.channel.epoll.EpollServerSocketChannel;
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import io.netty.channel.kqueue.KQueue;
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import io.netty.channel.kqueue.KQueueIoHandler;
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import io.netty.channel.kqueue.KQueueServerSocketChannel;
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import io.netty.channel.nio.NioIoHandler;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.handler.codec.http.HttpObjectAggregator;
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import io.netty.handler.codec.http.HttpServerCodec;
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public final class HttpServer {
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public static void start(int port, Router router) throws InterruptedException {
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EventLoopGroup boss, worker;
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Class<? extends ServerChannel> channelClass;
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if (Epoll.isAvailable()) {
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boss = new MultiThreadIoEventLoopGroup(1, EpollIoHandler.newFactory());
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worker = new MultiThreadIoEventLoopGroup(EpollIoHandler.newFactory());
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channelClass = EpollServerSocketChannel.class;
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} else if (KQueue.isAvailable()) {
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boss = new MultiThreadIoEventLoopGroup(1, KQueueIoHandler.newFactory());
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worker = new MultiThreadIoEventLoopGroup(KQueueIoHandler.newFactory());
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channelClass = KQueueServerSocketChannel.class;
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} else {
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boss = new MultiThreadIoEventLoopGroup(1, NioIoHandler.newFactory());
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worker = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
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channelClass = NioServerSocketChannel.class;
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}
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try {
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new ServerBootstrap()
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.group(boss, worker)
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.channel(channelClass)
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.option(ChannelOption.SO_BACKLOG, 8192)
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.childOption(ChannelOption.TCP_NODELAY, true)
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.childOption(ChannelOption.SO_KEEPALIVE, true)
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.childHandler(new ChannelInitializer<SocketChannel>() {
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@Override
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protected void initChannel(SocketChannel ch) {
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ch.pipeline()
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.addLast(new HttpServerCodec())
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.addLast(new HttpObjectAggregator(1024 * 1024))
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.addLast(new HttpRequestHandler(router));
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}
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})
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.bind(port).sync().channel().closeFuture().sync();
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} finally {
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boss.shutdownGracefully();
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worker.shutdownGracefully();
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}
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}
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}
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@@ -0,0 +1,103 @@
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package dev.coph.nextusweb.server.annotation;
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import dev.coph.nextusweb.server.router.Request;
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import dev.coph.nextusweb.server.router.Response;
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import dev.coph.nextusweb.server.router.Router;
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import io.netty.handler.codec.http.HttpMethod;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import java.lang.reflect.Method;
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public final class AnnotationScanner {
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private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
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private static final MethodType HANDLER_TYPE =
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MethodType.methodType(void.class, Request.class, Response.class);
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private AnnotationScanner() {
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}
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public static void register(Router router, Object controller) {
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Class<?> clazz = controller.getClass();
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Controller ctrlAnno = clazz.getAnnotation(Controller.class);
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if (ctrlAnno == null) {
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throw new IllegalArgumentException(
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clazz.getName() + " ist nicht mit @Controller annotiert");
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}
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String prefix = normalizePrefix(ctrlAnno.value());
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for (Method method : clazz.getDeclaredMethods()) {
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RouteInfo info = extractRoute(method);
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if (info == null) continue;
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validateSignature(method);
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try {
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method.setAccessible(true);
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MethodHandle mh = LOOKUP.unreflect(method).bindTo(controller);
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Router.Handler handler = (req, res) -> {
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try {
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mh.invokeExact(req, res);
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} catch (Throwable t) {
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if (t instanceof Exception e) throw e;
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throw new RuntimeException(t);
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}
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};
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String fullPath = prefix + normalizePath(info.path());
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router.register(HttpMethod.valueOf(info.method()), fullPath, handler);
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System.out.printf("Registered: %-6s %-30s -> %s.%s%n",
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info.method(), fullPath, clazz.getSimpleName(), method.getName());
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} catch (IllegalAccessException e) {
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throw new RuntimeException("Konnte Methode nicht registrieren: " + method, e);
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}
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}
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}
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private static String normalizePrefix(String p) {
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if (p == null || p.isEmpty()) return "";
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return p.startsWith("/") ? p : "/" + p;
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}
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private static RouteInfo extractRoute(Method m) {
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Route r = m.getAnnotation(Route.class);
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if (r != null) return new RouteInfo(r.method(), r.path());
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GET get = m.getAnnotation(GET.class);
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if (get != null) return new RouteInfo("GET", get.value());
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POST post = m.getAnnotation(POST.class);
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if (post != null) return new RouteInfo("POST", post.value());
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PUT put = m.getAnnotation(PUT.class);
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if (put != null) return new RouteInfo("PUT", put.value());
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DELETE del = m.getAnnotation(DELETE.class);
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if (del != null) return new RouteInfo("DELETE", del.value());
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return null;
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}
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private static void validateSignature(Method m) {
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Class<?>[] params = m.getParameterTypes();
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if (params.length != 2 || params[0] != Request.class || params[1] != Response.class) {
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throw new IllegalArgumentException(
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"Handler-Methode " + m + " muss Signatur (Request, Response) haben");
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}
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if (m.getReturnType() != void.class) {
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throw new IllegalArgumentException(
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"Handler-Methode " + m + " muss void zurückgeben");
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}
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}
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private static String normalizePath(String p) {
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if (p == null || p.isEmpty()) return "";
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return p.startsWith("/") ? p : "/" + p;
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}
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private record RouteInfo(String method, String path) {
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}
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}
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@@ -0,0 +1,12 @@
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package dev.coph.nextusweb.server.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.TYPE)
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public @interface Controller {
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String value() default "";
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}
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@@ -0,0 +1,12 @@
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package dev.coph.nextusweb.server.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.METHOD)
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public @interface DELETE {
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String value();
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}
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@@ -0,0 +1,12 @@
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package dev.coph.nextusweb.server.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.METHOD)
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public @interface GET {
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String value();
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}
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@@ -0,0 +1,12 @@
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package dev.coph.nextusweb.server.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.METHOD)
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public @interface POST {
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String value();
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}
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@@ -0,0 +1,12 @@
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package dev.coph.nextusweb.server.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.METHOD)
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public @interface PUT {
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String value();
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}
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@@ -0,0 +1,14 @@
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package dev.coph.nextusweb.server.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.METHOD)
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public @interface Route {
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String method();
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String path();
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}
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@@ -0,0 +1,14 @@
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package dev.coph.nextusweb.server.json;
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import tools.jackson.databind.ObjectMapper;
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import tools.jackson.databind.json.JsonMapper;
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public final class Json {
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public static final ObjectMapper MAPPER = JsonMapper.builder()
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// .addModule(new JavaTimeModule())
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.build();
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private Json() {}
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}
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@@ -0,0 +1,86 @@
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package dev.coph.nextusweb.server.router;
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import dev.coph.nextusweb.server.json.Json;
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import dev.coph.nextusweb.server.router.exception.BadRequestException;
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import io.netty.handler.codec.http.*;
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import io.netty.util.CharsetUtil;
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import tools.jackson.core.JacksonException;
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import tools.jackson.databind.JsonNode;
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import java.util.*;
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public final class Request {
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private final FullHttpRequest raw;
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private final Map<String, String> pathParams;
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private Map<String, List<String>> queryParams;
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private JsonNode jsonCache;
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public Request(FullHttpRequest raw, Map<String, String> pathParams) {
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this.raw = raw;
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this.pathParams = pathParams;
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}
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public String pathParam(String name) {
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return pathParams.get(name);
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}
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public String queryParam(String name) {
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if (queryParams == null) {
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queryParams = new QueryStringDecoder(raw.uri()).parameters();
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}
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var values = queryParams.get(name);
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return values == null || values.isEmpty() ? null : values.getFirst();
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}
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public List<String> queryParams(String name) {
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if (queryParams == null) {
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queryParams = new QueryStringDecoder(raw.uri()).parameters();
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}
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return queryParams.getOrDefault(name, List.of());
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}
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public String header(String name) {
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return raw.headers().get(name);
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}
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public String body() {
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return raw.content().toString(CharsetUtil.UTF_8);
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}
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public JsonNode json() {
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if (jsonCache == null) {
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try {
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byte[] bytes = new byte[raw.content().readableBytes()];
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raw.content().getBytes(raw.content().readerIndex(), bytes);
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if (bytes.length == 0) {
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jsonCache = Json.MAPPER.nullNode();
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} else {
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jsonCache = Json.MAPPER.readTree(bytes);
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}
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} catch (JacksonException e) {
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throw new BadRequestException("Invalid JSON: " + e.getOriginalMessage());
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}
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}
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return jsonCache;
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}
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public <T> T jsonAs(Class<T> type) {
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try {
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byte[] bytes = new byte[raw.content().readableBytes()];
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raw.content().getBytes(raw.content().readerIndex(), bytes);
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return Json.MAPPER.readValue(bytes, type);
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} catch (JacksonException e) {
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throw new BadRequestException(
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"Could not deserialize body as " + type.getSimpleName() + ": " + e.getOriginalMessage());
|
||||
}
|
||||
}
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public HttpMethod method() {
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return raw.method();
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}
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public String path() {
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return new QueryStringDecoder(raw.uri()).path();
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}
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||||
}
|
||||
@@ -0,0 +1,46 @@
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package dev.coph.nextusweb.server.router;
|
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import dev.coph.nextusweb.server.json.Json;
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import io.netty.handler.codec.http.*;
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import io.netty.util.CharsetUtil;
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import tools.jackson.core.JacksonException;
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public final class Response {
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private int status = 200;
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private final HttpHeaders headers = new DefaultHttpHeaders();
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private byte[] body = new byte[0];
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||||
|
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public Response status(int s) { this.status = s; return this; }
|
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|
||||
public Response header(String name, String value) {
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headers.set(name, value);
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return this;
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}
|
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|
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public Response text(String s) {
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this.body = s.getBytes(CharsetUtil.UTF_8);
|
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headers.set(HttpHeaderNames.CONTENT_TYPE, "text/plain; charset=utf-8");
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return this;
|
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}
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public Response json(String json) {
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this.body = json.getBytes(CharsetUtil.UTF_8);
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headers.set(HttpHeaderNames.CONTENT_TYPE, "application/json; charset=utf-8");
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return this;
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}
|
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|
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public Response json(Object value) {
|
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try {
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this.body = Json.MAPPER.writeValueAsBytes(value);
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headers.set(HttpHeaderNames.CONTENT_TYPE, "application/json; charset=utf-8");
|
||||
} catch (JacksonException e) {
|
||||
throw new RuntimeException("JSON serialization failed", e);
|
||||
}
|
||||
return this;
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||||
}
|
||||
|
||||
public int status() { return status; }
|
||||
public HttpHeaders headers() { return headers; }
|
||||
public byte[] body() { return body; }
|
||||
}
|
||||
@@ -0,0 +1,132 @@
|
||||
package dev.coph.nextusweb.server.router;
|
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|
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import io.netty.handler.codec.http.HttpMethod;
|
||||
|
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import java.util.*;
|
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import java.util.concurrent.ConcurrentHashMap;
|
||||
import java.util.function.BiConsumer;
|
||||
|
||||
public final class Router {
|
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|
||||
private final Node root = new Node();
|
||||
private final List<BiConsumer<Request, Response>> middlewares = new ArrayList<>();
|
||||
|
||||
public Router use(BiConsumer<Request, Response> middleware) {
|
||||
middlewares.add(middleware);
|
||||
return this;
|
||||
}
|
||||
|
||||
public Router get(String path, Handler h) {
|
||||
return register(HttpMethod.GET, path, h);
|
||||
}
|
||||
|
||||
public Router register(HttpMethod method, String path, Handler h) {
|
||||
Node node = root;
|
||||
for (String segment : split(path)) {
|
||||
if (segment.startsWith("{") && segment.endsWith("}")) {
|
||||
if (node.paramChild == null) {
|
||||
node.paramChild = new Node();
|
||||
node.paramName = segment.substring(1, segment.length() - 1);
|
||||
}
|
||||
node = node.paramChild;
|
||||
} else if (segment.equals("*")) {
|
||||
if (node.wildcardChild == null) node.wildcardChild = new Node();
|
||||
node = node.wildcardChild;
|
||||
} else {
|
||||
node = node.children.computeIfAbsent(segment, k -> new Node());
|
||||
}
|
||||
}
|
||||
node.handlers.put(method, h);
|
||||
return this;
|
||||
}
|
||||
|
||||
private static List<String> split(String path) {
|
||||
List<String> out = new ArrayList<>();
|
||||
int start = path.startsWith("/") ? 1 : 0;
|
||||
for (int i = start; i < path.length(); i++) {
|
||||
if (path.charAt(i) == '/') {
|
||||
if (i > start) out.add(path.substring(start, i));
|
||||
start = i + 1;
|
||||
}
|
||||
}
|
||||
if (start < path.length()) out.add(path.substring(start));
|
||||
return out;
|
||||
}
|
||||
|
||||
public Router post(String path, Handler h) {
|
||||
return register(HttpMethod.POST, path, h);
|
||||
}
|
||||
|
||||
public Router put(String path, Handler h) {
|
||||
return register(HttpMethod.PUT, path, h);
|
||||
}
|
||||
|
||||
public Router delete(String path, Handler h) {
|
||||
return register(HttpMethod.DELETE, path, h);
|
||||
}
|
||||
|
||||
/**
|
||||
* Resolve den Pfad zu einem Handler. Liefert:
|
||||
* - Match wenn Pfad + Methode passen
|
||||
* - MethodNotAllowed wenn der Pfad existiert, aber nicht für diese Methode
|
||||
* - NotFound wenn der Pfad gar nicht registriert ist
|
||||
*/
|
||||
public Resolution resolve(HttpMethod method, String path) {
|
||||
Map<String, String> params = new HashMap<>(4);
|
||||
Node node = root;
|
||||
for (String segment : split(path)) {
|
||||
Node next = node.children.get(segment);
|
||||
if (next != null) {
|
||||
node = next;
|
||||
} else if (node.paramChild != null) {
|
||||
params.put(node.paramName, segment);
|
||||
node = node.paramChild;
|
||||
} else if (node.wildcardChild != null) {
|
||||
node = node.wildcardChild;
|
||||
} else {
|
||||
return new Resolution.NotFound();
|
||||
}
|
||||
}
|
||||
|
||||
Handler h = node.handlers.get(method);
|
||||
if (h != null) {
|
||||
return new Resolution.Match(h, params);
|
||||
}
|
||||
|
||||
// Pfad existiert, aber nicht für diese Methode
|
||||
if (!node.handlers.isEmpty()) {
|
||||
return new Resolution.MethodNotAllowed(
|
||||
Collections.unmodifiableSet(node.handlers.keySet()));
|
||||
}
|
||||
|
||||
return new Resolution.NotFound();
|
||||
}
|
||||
|
||||
public List<BiConsumer<Request, Response>> middlewares() {
|
||||
return middlewares;
|
||||
}
|
||||
|
||||
public sealed interface Resolution {
|
||||
record Match(Handler handler, Map<String, String> pathParams) implements Resolution {
|
||||
}
|
||||
|
||||
record MethodNotAllowed(Set<HttpMethod> allowedMethods) implements Resolution {
|
||||
}
|
||||
|
||||
record NotFound() implements Resolution {
|
||||
}
|
||||
}
|
||||
|
||||
@FunctionalInterface
|
||||
public interface Handler {
|
||||
void handle(Request req, Response res) throws Exception;
|
||||
}
|
||||
|
||||
private static final class Node {
|
||||
final Map<String, Node> children = new ConcurrentHashMap<>();
|
||||
final Map<HttpMethod, Handler> handlers = new ConcurrentHashMap<>();
|
||||
Node paramChild; // für {id}
|
||||
String paramName;
|
||||
Node wildcardChild; // für *
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,5 @@
|
||||
package dev.coph.nextusweb.server.router.exception;
|
||||
|
||||
public final class BadRequestException extends RuntimeException {
|
||||
public BadRequestException(String message) { super(message); }
|
||||
}
|
||||
Reference in New Issue
Block a user