Implement rendering of binary data.

src/main/java/ch/fritteli/labyrinth/server/LabyrinthServer.java

@@ -45,7 +45,7 @@ public class LabyrinthServer {
     private void start() {
         Runtime.getRuntime().addShutdownHook(new Thread(this::stop, "listener-stopper"));
         this.undertow.start();
-        log.info("Listeing on http://{}:{}", this.config.getAddress().getHostAddress(), this.config.getPort());
+        log.info("Listening on http://{}:{}", this.config.getAddress().getHostAddress(), this.config.getPort());
     }
 
     private void stop() {
@@ -53,48 +53,4 @@ public class LabyrinthServer {
         this.undertow.stop();
         log.info("Server stopped.");
     }
-
-//    private void handleRender(final HttpExchange exchange) {
-//        this.executorService.submit(() -> {
-//            try {
-//                log.debug("Handling request to {}", exchange.getRequestURI());
-//                final String requestMethod = exchange.getRequestMethod();
-//                if (!requestMethod.equals("POST")) {
-//                    exchange.getResponseBody().close();
-//                    exchange.sendResponseHeaders(405, -1);
-//                    return;
-//                }
-//                final byte[] bytes = exchange.getRequestBody().readAllBytes();
-//
-//                final Labyrinth labyrinth = SerializerDeserializer.deserialize(bytes);
-//
-//                final OutputType output = exchange.getRequestHeaders()
-//                                                  .get("Accept")
-//                                                  .contains(OutputType.HTML.getContentType()) ?
-//                                          OutputType.HTML :
-//                                          OutputType.TEXT_PLAIN;
-//                final byte[] render;
-//                final Headers responseHeaders = exchange.getResponseHeaders();
-//                try {
-//                    render = output.render(labyrinth);
-//                } catch (Exception e) {
-//                    responseHeaders.add("Content-type", "text/plain; charset=UTF-8");
-//                    exchange.sendResponseHeaders(500, 0);
-//                    final OutputStream responseBody = exchange.getResponseBody();
-//                    responseBody.write(("Error: " + e).getBytes(StandardCharsets.UTF_8));
-//                    responseBody.flush();
-//                    return;
-//                }
-//                responseHeaders.add("Content-type", output.getContentType());
-//                exchange.sendResponseHeaders(200, 0);
-//                final OutputStream responseBody = exchange.getResponseBody();
-//                responseBody.write(render);
-//                responseBody.flush();
-//            } catch (Exception e) {
-//                log.error("FSCK!", e);
-//            } finally {
-//                exchange.close();
-//            }
-//        });
-//    }
 }

src/main/java/ch/fritteli/labyrinth/server/handler/AbstractHttpHandler.java

@@ -7,13 +7,17 @@ import lombok.NonNull;
 import lombok.extern.slf4j.Slf4j;
 import org.slf4j.MDC;
 
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.UUID;
 
 @Slf4j
 public abstract class AbstractHttpHandler implements HttpHandler {
     @Override
     public final void handleRequest(@NonNull final HttpServerExchange exchange) {
-        try (final MDC.MDCCloseable mdc = MDC.putCloseable("correlationId", UUID.randomUUID().toString())) {
+        final Instant start = Instant.now();
+        try (final MDC.MDCCloseable closeable = MDC.putCloseable("correlationId", UUID.randomUUID().toString())) {
+
             if (exchange.isInIoThread()) {
                 log.debug("Dispatching request");
                 exchange.dispatch(this);
@@ -27,6 +31,7 @@ public abstract class AbstractHttpHandler implements HttpHandler {
                         .getResponseSender()
                         .send(StatusCodes.INTERNAL_SERVER_ERROR_STRING);
             }
+            log.debug("Completed request in {}ms.", start.until(Instant.now(), ChronoUnit.MILLIS));
         }
     }
 

src/main/java/ch/fritteli/labyrinth/server/handler/RenderHandler.java

@@ -1,17 +1,49 @@
 package ch.fritteli.labyrinth.server.handler;
 
+import ch.fritteli.labyrinth.generator.model.Labyrinth;
+import ch.fritteli.labyrinth.generator.serialization.SerializerDeserializer;
+import ch.fritteli.labyrinth.server.OutputType;
 import io.undertow.server.HttpHandler;
 import io.undertow.server.HttpServerExchange;
+import io.undertow.util.Headers;
 import io.undertow.util.StatusCodes;
+import io.vavr.control.Option;
+import lombok.extern.slf4j.Slf4j;
 
+import java.nio.ByteBuffer;
+
+@Slf4j
 public class RenderHandler implements HttpHandler {
     @Override
     public void handleRequest(final HttpServerExchange exchange) {
+        log.debug("Handling render request");
+
         if (exchange.isInIoThread()) {
             exchange.dispatch(this);
             return;
         }
-        exchange.setStatusCode(StatusCodes.NOT_IMPLEMENTED);
+        exchange.getRequestReceiver().receiveFullBytes((httpServerExchange, bytes) -> {
-        exchange.getResponseSender().send("Rendering binary data is not implemented yet.");
+            final Labyrinth labyrinth = SerializerDeserializer.deserialize(bytes);
+            final OutputType output = Option.of(httpServerExchange.getRequestHeaders().get(Headers.ACCEPT))
+                    .exists(values -> values.contains(OutputType.HTML.getContentType())) ?
+                    OutputType.HTML :
+                    OutputType.TEXT_PLAIN;
+            final byte[] render;
+            try {
+                render = output.render(labyrinth);
+            } catch (final Exception e) {
+                log.error("Error rendering binary labyrinth data", e);
+                httpServerExchange.setStatusCode(StatusCodes.INTERNAL_SERVER_ERROR)
+                        .getResponseSender()
+                        .send("Error rendering labyrinth: %s".formatted(e.getMessage()));
+                return;
+            }
+            httpServerExchange
+                    .setStatusCode(StatusCodes.OK)
+                    .getResponseHeaders()
+                    .put(Headers.CONTENT_TYPE, output.getContentType());
+            httpServerExchange.getResponseSender()
+                    .send(ByteBuffer.wrap(render));
+        });
     }
 }

src/main/resources/logback.xml

@@ -13,5 +13,7 @@
     <root level="info">
         <appender-ref ref="STDOUT"/>
     </root>
+    <logger name="ch.fritteli.labyrinth.server.handler.AbstractHttpHandler" level="debug"/>
     <logger name="ch.fritteli.labyrinth.server.handler.CreateHandler" level="debug"/>
+    <logger name="ch.fritteli.labyrinth.server.handler.RenderHandler" level="debug"/>
 </configuration>