1 files changed, 125 insertions, 0 deletions
diff --git a/backend/main.go b/backend/main.go
new file mode 100644
index 0000000..a185de9
--- /dev/null
+++ b/backend/main.go
@@ -0,0 +1,125 @@
+/*
+ * Main listener
+ *
+ * Copyright (C) 2024  Runxi Yu <https://runxiyu.org>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package main
+
+import (
+	"crypto/tls"
+	"flag"
+	"html/template"
+	"log"
+	"net"
+	"net/http"
+	"time"
+)
+
+var tmpl *template.Template
+
+func main() {
+	var err error
+
+	var configPath string
+
+	flag.StringVar(&configPath, "config", "cca.scfg", "path to configuration file")
+	flag.Parse()
+
+	if err := fetchConfig(configPath); err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println("Setting up database")
+	if err := setupDatabase(); err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println("Setting up JWKS")
+	if err := setupJwks(); err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println("Setting up templates")
+	tmpl, err = template.ParseGlob(config.Tmpl)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println("Setting up courses")
+	err = setupCourses()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println("Registering static handle")
+	fs := http.FileServer(http.Dir(config.Static))
+	http.Handle("/static/", http.StripPrefix("/static/", fs))
+
+	log.Println("Registering handlers")
+	http.HandleFunc("/{$}", handleIndex)
+	http.HandleFunc("/auth", handleAuth)
+	http.HandleFunc("/ws", handleWs)
+
+	var l net.Listener
+
+	switch config.Listen.Trans {
+	case "plain":
+		log.Printf(
+			"Establishing plain listener for net \"%s\", addr \"%s\"\n",
+			config.Listen.Net,
+			config.Listen.Addr,
+		)
+		l, err = net.Listen(config.Listen.Net, config.Listen.Addr)
+		if err != nil {
+			log.Fatalf("Failed to establish plain listener: %v\n", err)
+		}
+	case "tls":
+		cer, err := tls.LoadX509KeyPair(config.Listen.TLS.Cert, config.Listen.TLS.Key)
+		if err != nil {
+			log.Fatalf("Failed to load TLS certificate and key: %v\n", err)
+		}
+		tlsconfig := &tls.Config{
+			Certificates: []tls.Certificate{cer},
+			MinVersion:   tls.VersionTLS13,
+		} //exhaustruct:ignore
+		log.Printf(
+			"Establishing TLS listener for net \"%s\", addr \"%s\"\n",
+			config.Listen.Net,
+			config.Listen.Addr,
+		)
+		l, err = tls.Listen(config.Listen.Net, config.Listen.Addr, tlsconfig)
+		if err != nil {
+			log.Fatalf("Failed to establish TLS listener: %v\n", err)
+		}
+	default:
+		log.Fatalln("listen.trans must be \"plain\" or \"tls\"")
+	}
+
+	if config.Listen.Proto == "http" {
+		log.Println("Serving http")
+		srv := &http.Server{
+			ReadHeaderTimeout: time.Duration(config.Perf.ReadHeaderTimeout) * time.Second,
+		} //exhaustruct:ignore
+		err = srv.Serve(l)
+	} else {
+		log.Fatalln("Unsupported protocol")
+	}
+	if err != nil {
+		log.Fatal(err)
+	}
+}