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Refactor dispatch (now called HTTP) server (pt. 1)

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KingRainbow44
2022-05-13 11:39:40 -04:00
parent a0067b664e
commit 840f4706b5
17 changed files with 828 additions and 67 deletions
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176
src/main/java/emu/grasscutter/server/http/HttpServer.java Normal file
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package emu.grasscutter.server.http;
import emu.grasscutter.Grasscutter;
import emu.grasscutter.Grasscutter.ServerDebugMode;
import express.Express;
import io.javalin.Javalin;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.util.ssl.SslContextFactory;
import java.io.File;
import static emu.grasscutter.Configuration.*;
import static emu.grasscutter.utils.Language.translate;
/**
* Manages all HTTP-related classes.
* (including dispatch, announcements, gacha, etc.)
*/
public final class HttpServer {
private final Express express;
/**
* Configures the Express application.
*/
public HttpServer() {
this.express = new Express(config -> {
// Set the Express HTTP server.
config.server(HttpServer::createServer);
// Configure encryption/HTTPS/SSL.
config.enforceSsl = HTTP_ENCRYPTION.useEncryption;
// Configure HTTP policies.
if(HTTP_POLICIES.cors.enabled) {
var allowedOrigins = HTTP_POLICIES.cors.allowedOrigins;
if (allowedOrigins.length > 0)
config.enableCorsForOrigin(allowedOrigins);
else config.enableCorsForAllOrigins();
}
// Configure debug logging.
if(SERVER.debugLevel == ServerDebugMode.ALL)
config.enableDevLogging();
// Disable compression on static files.
config.precompressStaticFiles = false;
});
}
/**
* Creates an HTTP(S) server.
* @return A server instance.
*/
@SuppressWarnings("resource")
private static Server createServer() {
Server server = new Server();
ServerConnector serverConnector
= new ServerConnector(server);
if(HTTP_ENCRYPTION.useEncryption) {
var sslContextFactory = new SslContextFactory.Server();
var keystoreFile = new File(HTTP_ENCRYPTION.keystore);
if(!keystoreFile.exists()) {;
HTTP_ENCRYPTION.useEncryption = false;
HTTP_ENCRYPTION.useInRouting = false;
Grasscutter.getLogger().warn(translate("messages.dispatch.keystore.no_keystore_error"));
} else try {
sslContextFactory.setKeyStorePath(keystoreFile.getPath());
sslContextFactory.setKeyStorePassword(HTTP_ENCRYPTION.keystorePassword);
} catch (Exception ignored) {
Grasscutter.getLogger().warn(translate("messages.dispatch.keystore.password_error"));
try {
sslContextFactory.setKeyStorePath(keystoreFile.getPath());
sslContextFactory.setKeyStorePassword("123456");
Grasscutter.getLogger().warn(translate("messages.dispatch.keystore.default_password"));
} catch (Exception exception) {
Grasscutter.getLogger().warn(translate("messages.dispatch.keystore.general_error"), exception);
}
} finally {
serverConnector = new ServerConnector(server, sslContextFactory);
}
}
serverConnector.setPort(HTTP_INFO.bindPort);
server.setConnectors(new ServerConnector[]{serverConnector});
return server;
}
/**
* Returns the handle for the Express application.
* @return A Javalin instance.
*/
public Javalin getHandle() {
return this.express.raw();
}
/**
* Initializes the provided class.
* @param router The router class.
* @return Method chaining.
*/
@SuppressWarnings("UnusedReturnValue")
public HttpServer addRouter(Class<? extends Router> router, Object... args) {
// Get all constructor parameters.
Class<?>[] types = new Class<?>[args.length];
for(var argument : args)
types[args.length - 1] = argument.getClass();
try { // Create a router instance & apply routes.
var constructor = router.getDeclaredConstructor(types); // Get the constructor.
var routerInstance = constructor.newInstance(args); // Create instance.
routerInstance.applyRoutes(this.express, this.getHandle()); // Apply routes.
} catch (Exception exception) {
Grasscutter.getLogger().warn(translate("messages.dispatch.router_error"), exception);
} return this;
}
/**
* Starts listening on the HTTP server.
*/
public void start() {
// Attempt to start the HTTP server.
this.express.listen(HTTP_INFO.bindAddress, HTTP_INFO.bindPort);
// Log bind information.
Grasscutter.getLogger().info(translate("messages.dispatch.port_bind", Integer.toString(this.express.raw().port())));
}
/**
* Handles the '/' (index) endpoint on the Express application.
*/
public static class DefaultRequestRouter implements Router {
@Override public void applyRoutes(Express express, Javalin handle) {
express.get("/", (req, res) -> res.send("""
<!DOCTYPE html>
<html>
<head>
<meta charset="utf8">
</head>
<body>%s</body>
</html>
""".formatted(translate("messages.status.welcome"))));
}
}
/**
* Handles unhandled endpoints on the Express application.
*/
public static class UnhandledRequestRouter implements Router {
@Override public void applyRoutes(Express express, Javalin handle) {
handle.error(404, context -> {
if(SERVER.debugLevel == ServerDebugMode.MISSING)
Grasscutter.getLogger().info(translate("messages.dispatch.unhandled_request_error", context.method(), context.url()));
context.contentType("text/html");
context.result("""
<!DOCTYPE html>
<html>
<head>
<meta charset=\\"utf8\\">
</head>
<body>
<img src=\\"https://http.cat/404\\" />
</body>
</html>
""");
});
}
}
}