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423 lines (360 loc) · 15.2 KB
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package org.javawebstack.httpserver;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.websocket.servlet.WebSocketServletFactory;
import org.javawebstack.abstractdata.AbstractMapper;
import org.javawebstack.httpserver.helper.JettyNoLog;
import org.javawebstack.httpserver.helper.HttpMethod;
import org.javawebstack.httpserver.router.DefaultRouteAutoInjector;
import org.javawebstack.httpserver.router.RouteAutoInjector;
import org.javawebstack.httpserver.router.RouteBinder;
import org.javawebstack.httpserver.transformer.route.DefaultRouteParamTransformer;
import org.javawebstack.httpserver.router.Route;
import org.javawebstack.httpserver.transformer.route.RouteParamTransformer;
import org.javawebstack.httpserver.transformer.route.RouteParamTransformerProvider;
import org.javawebstack.httpserver.transformer.response.ResponseTransformer;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.javawebstack.httpserver.handler.*;
import org.javawebstack.httpserver.websocket.InternalWebSocketAdapter;
import org.javawebstack.httpserver.websocket.InternalWebSocketRequestHandler;
import org.javawebstack.injector.Injector;
import org.reflections.Reflections;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
public class HTTPServer implements RouteParamTransformerProvider {
private Logger logger = Logger.getLogger("HTTP-Server");
private final List<Route> routes = new ArrayList<>();
private final RouteBinder routeBinder = new RouteBinder(this);
private final List<RouteParamTransformer> routeParamTransformers = new ArrayList<>();
private final List<ResponseTransformer> responseTransformers = new ArrayList<>();
private RequestHandler notFoundHandler = new DefaultNotFoundHandler();
private ExceptionHandler exceptionHandler = new ExceptionHandler.DefaultExceptionHandler();
private final List<Route> beforeRoutes = new ArrayList<>();
private final List<Route> afterRoutes = new ArrayList<>();
private Server server;
private int port = 80;
private final List<RequestInterceptor> beforeInterceptors = new ArrayList<>();
private Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
.setDateFormat("yyyy-MM-dd HH:mm:ss").disableHtmlEscaping().create();
private AbstractMapper abstractMapper = new AbstractMapper();
private Injector injector = null;
private org.eclipse.jetty.websocket.server.WebSocketHandler webSocketHandler;
private List<RouteAutoInjector> routeAutoInjectors = new ArrayList<>();
private final Map<String, RequestHandler> beforeMiddleware = new HashMap<>();
private final Map<String, AfterRequestHandler> afterMiddleware = new HashMap<>();
public HTTPServer(){
routeParamTransformers.add(DefaultRouteParamTransformer.INSTANCE);
routeAutoInjectors.add(DefaultRouteAutoInjector.INSTANCE);
}
public HTTPServer logger(Logger logger){
this.logger = logger;
return this;
}
public HTTPServer abstractMapper(AbstractMapper mapper){
this.abstractMapper = mapper;
return this;
}
public AbstractMapper getAbstractMapper() {
return abstractMapper;
}
public Logger getLogger(){
return logger;
}
public HTTPServer beforeInterceptor(RequestInterceptor handler){
beforeInterceptors.add(handler);
return this;
}
public HTTPServer routeAutoInjector(RouteAutoInjector injector){
routeAutoInjectors.add(injector);
return this;
}
public HTTPServer get(String pattern, RequestHandler... handlers){
return route(HttpMethod.GET, pattern, handlers);
}
public HTTPServer beforeGet(String pattern, RequestHandler... handlers){
return beforeRoute(HttpMethod.GET, pattern, handlers);
}
public HTTPServer afterGet(String pattern, AfterRequestHandler... handlers){
return afterRoute(HttpMethod.GET, pattern, handlers);
}
public HTTPServer post(String pattern, RequestHandler... handlers){
return route(HttpMethod.POST, pattern, handlers);
}
public HTTPServer beforePost(String pattern, RequestHandler... handlers){
return beforeRoute(HttpMethod.POST, pattern, handlers);
}
public HTTPServer afterPost(String pattern, AfterRequestHandler... handlers){
return afterRoute(HttpMethod.POST, pattern, handlers);
}
public HTTPServer put(String pattern, RequestHandler... handlers){
return route(HttpMethod.PUT, pattern, handlers);
}
public HTTPServer beforePut(String pattern, RequestHandler... handlers){
return beforeRoute(HttpMethod.PUT, pattern, handlers);
}
public HTTPServer afterPut(String pattern, AfterRequestHandler... handlers){
return afterRoute(HttpMethod.PUT, pattern, handlers);
}
public HTTPServer delete(String pattern, RequestHandler... handlers){
return route(HttpMethod.DELETE, pattern, handlers);
}
public HTTPServer staticDirectory(String pathPrefix, File directory){
return get(pathPrefix+(pathPrefix.endsWith("/") ? "" : "/")+"{*:path}", new StaticDirectoryHandler(directory));
}
public HTTPServer staticDirectory(String pathPrefix, String directory){
return staticDirectory(pathPrefix, new File(directory));
}
public HTTPServer beforeDelete(String pattern, RequestHandler... handlers){
return beforeRoute(HttpMethod.DELETE, pattern, handlers);
}
public HTTPServer afterDelete(String pattern, AfterRequestHandler... handlers){
return afterRoute(HttpMethod.DELETE, pattern, handlers);
}
public HTTPServer route(HttpMethod method, String pattern, RequestHandler... handlers){
routes.add(new Route(this, method, pattern, Arrays.asList(handlers)));
return this;
}
public HTTPServer beforeRoute(HttpMethod method, String pattern, RequestHandler... handlers){
beforeRoutes.add(new Route(this, method, pattern, Arrays.asList(handlers)));
return this;
}
public HTTPServer afterRoute(HttpMethod method, String pattern, AfterRequestHandler... handlers){
afterRoutes.add(new Route(this, method, pattern, null).setAfterHandlers(Arrays.asList(handlers)));
return this;
}
public HTTPServer route(HttpMethod[] methods, String pattern, RequestHandler... handlers){
for(HttpMethod method : methods)
route(method, pattern, handlers);
return this;
}
public HTTPServer beforeRoute(HttpMethod[] methods, String pattern, RequestHandler... handlers){
for(HttpMethod method : methods)
beforeRoute(method, pattern, handlers);
return this;
}
public HTTPServer afterRoute(HttpMethod[] methods, String pattern, AfterRequestHandler... handlers){
for(HttpMethod method : methods)
afterRoute(method, pattern, handlers);
return this;
}
public HTTPServer any(String pattern, RequestHandler... handlers){
return route(HttpMethod.values(), pattern, handlers);
}
public HTTPServer beforeAny(String pattern, RequestHandler... handlers){
return beforeRoute(HttpMethod.values(), pattern, handlers);
}
public HTTPServer afterAny(String pattern, AfterRequestHandler... handlers){
return afterRoute(HttpMethod.values(), pattern, handlers);
}
public HTTPServer webSocket(String pattern, WebSocketHandler handler){
return route(HttpMethod.WEBSOCKET, pattern, new InternalWebSocketRequestHandler(handler));
}
public HTTPServer middleware(String name, RequestHandler handler){
beforeMiddleware.put(name, handler);
return this;
}
public HTTPServer middleware(String name, AfterRequestHandler handler){
afterMiddleware.put(name, handler);
return this;
}
public HTTPServer notFound(RequestHandler handler){
notFoundHandler = handler;
return this;
}
public HTTPServer routeParamTransformer(RouteParamTransformer transformer){
routeParamTransformers.add(transformer);
return this;
}
public HTTPServer responseTransformer(ResponseTransformer transformer){
responseTransformers.add(transformer);
return this;
}
public HTTPServer exceptionHandler(ExceptionHandler handler){
exceptionHandler = handler;
return this;
}
public HTTPServer controller(Class<?> parentClass, Package p){
return controller("", parentClass, p);
}
public HTTPServer controller(String globalPrefix, Class<?> parentClass, Package p){
Reflections reflections = new Reflections(p.getName());
reflections.getSubTypesOf(parentClass).forEach(c -> {
try {
Object controller = c.newInstance();
controller(globalPrefix, controller);
} catch (InstantiationException | IllegalAccessException e) {}
});
return this;
}
public HTTPServer controller(Object controller){
return controller("", controller);
}
public HTTPServer controller(String globalPrefix, Object controller){
if(injector != null)
injector.inject(controller);
routeBinder.bind(globalPrefix, controller);
return this;
}
public HTTPServer injector(Injector injector){
this.injector = injector;
return this;
}
public HTTPServer gson(Gson gson){
this.gson = gson;
return this;
}
public HTTPServer port(int port){
this.port = port;
return this;
}
public HTTPServer start(){
Log.setLog(new JettyNoLog());
server = new Server(port);
server.setHandler(new HttpHandler());
webSocketHandler = new org.eclipse.jetty.websocket.server.WebSocketHandler(){
public void configure(WebSocketServletFactory webSocketServletFactory) {
webSocketServletFactory.register(InternalWebSocketAdapter.class);
}
};
webSocketHandler.setServer(server);
try {
server.start();
webSocketHandler.start();
logger.info("HTTP-Server started on port "+port);
}catch (Exception ex){
throw new RuntimeException(ex);
}
return this;
}
public void join() {
try {
server.join();
}catch (InterruptedException ex){
throw new RuntimeException(ex);
}
}
public void stop(){
try {
server.stop();
}catch (Exception ex){
throw new RuntimeException(ex);
}
}
public void execute(Exchange exchange){
try {
Object response = null;
try {
for(RequestInterceptor ic : beforeInterceptors){
if(ic.intercept(exchange)){
exchange.close();
return;
}
}
for(Route route : beforeRoutes){
exchange.pathVariables = route.match(exchange);
if(exchange.pathVariables == null)
continue;
for(RequestHandler handler : route.getHandlers()){
try {
response = handler.handle(exchange);
}catch (Throwable ex){
response = exceptionHandler.handle(exchange, ex);
}
}
exchange.pathVariables = null;
}
exchange.pathVariables = null;
if(response == null){
routes:
for(Route route : routes){
exchange.pathVariables = route.match(exchange);
if(exchange.pathVariables == null)
continue;
for(RequestHandler handler : route.getHandlers()){
response = handler.handle(exchange);
if(exchange.getMethod() == HttpMethod.WEBSOCKET)
return;
if(response != null)
break routes;
}
exchange.pathVariables = null;
}
}
}catch(Throwable ex){
response = exceptionHandler.handle(exchange, ex);
}
if(response == null)
response = notFoundHandler.handle(exchange);
exchange.pathVariables = null;
for(Route route : afterRoutes){
exchange.pathVariables = route.match(exchange);
if(exchange.pathVariables == null)
continue;
for(AfterRequestHandler handler : route.getAfterHandlers())
response = handler.handleAfter(exchange, response);
exchange.pathVariables = null;
}
if(response != null)
exchange.write(transformResponse(response));
if(exchange.getMethod() != HttpMethod.WEBSOCKET)
exchange.close();
return;
}catch(Throwable ex){
try {
exchange.write(transformResponse(exceptionHandler.handle(exchange, ex)));
}catch (Throwable ex2){
logger.log(Level.SEVERE, ex2, () -> "An error occured in the exception handler!");
}
}
exchange.close();
}
public List<RouteParamTransformer> getRouteParamTransformer() {
return routeParamTransformers;
}
public RouteParamTransformer getRouteParamTransformer(String type) {
return routeParamTransformers.stream().filter(t -> t.canTransform(type)).findFirst().orElse(null);
}
public RequestHandler getBeforeMiddleware(String name){
return beforeMiddleware.get(name);
}
public AfterRequestHandler getAfterMiddleware(String name){
return afterMiddleware.get(name);
}
public List<RouteAutoInjector> getRouteAutoInjectors(){
return routeAutoInjectors;
}
public byte[] transformResponse(Object object){
for(ResponseTransformer t : responseTransformers){
byte[] res = t.transformBytes(object);
if(res != null)
return res;
}
return object.toString().getBytes(StandardCharsets.UTF_8);
}
public Gson getGson() {
return gson;
}
public Injector getInjector(){
return injector;
}
private class HttpHandler extends AbstractHandler {
public void handle(String s, Request request, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) {
execute(new Exchange(HTTPServer.this, httpServletRequest, httpServletResponse));
}
}
public org.eclipse.jetty.websocket.server.WebSocketHandler getInternalWebSocketHandler() {
return webSocketHandler;
}
public ExceptionHandler getExceptionHandler() {
return exceptionHandler;
}
}