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|
/*
* 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"
"embed"
"flag"
"html/template"
"io/fs"
"log"
"net"
"net/http"
"time"
)
var tmpl *template.Template
//go:embed build/static/* tmpl/*
//go:embed build/iadocs/*.pdf build/iadocs/*.htm build/iadocs/*.html
//go:embed build/docs/*
var runFS embed.FS
//go:embed go.* *.go
//go:embed docs/* iadocs/*
//go:embed frontend/* tmpl/*
//go:embed README.md LICENSE Makefile .editorconfig .gitignore
//go:embed scripts/* sql/*
var srcFS embed.FS
func main() {
var err error
var configPath string
flag.StringVar(
&configPath,
"c",
"cca.scfg",
"path to configuration file",
)
flag.Parse()
if err := fetchConfig(configPath); err != nil {
log.Fatal(err)
}
log.Println("Setting up templates")
tmpl, err = template.ParseFS(runFS, "tmpl/*")
if err != nil {
log.Fatal(err)
}
log.Println("Registering static handle")
staticFS, err := fs.Sub(runFS, "build/static")
if err != nil {
log.Fatal(err)
}
http.Handle("/static/",
http.StripPrefix(
"/static/",
http.FileServer(http.FS(staticFS)),
),
)
log.Println("Registering iadocs handle")
iaDocsFS, err := fs.Sub(runFS, "build/iadocs")
if err != nil {
log.Fatal(err)
}
http.Handle("/iadocs/",
http.StripPrefix(
"/iadocs/",
http.FileServer(http.FS(iaDocsFS)),
),
)
log.Println("Registering docs handle")
docsFS, err := fs.Sub(runFS, "build/docs")
if err != nil {
log.Fatal(err)
}
http.Handle(
"/docs/",
http.StripPrefix(
"/docs/",
http.FileServer(http.FS(docsFS)),
),
)
log.Println("Registering source handle")
http.Handle(
"/src/",
http.StripPrefix(
"/src/", http.FileServer(http.FS(srcFS)),
),
)
log.Println("Registering handlers")
http.HandleFunc("/{$}", handleIndex)
http.HandleFunc("/export", handleExport)
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\"")
}
log.Println("Setting up database")
if err := setupDatabase(); err != nil {
log.Fatal(err)
}
log.Println("Setting up courses")
err = setupCourses()
if err != nil {
log.Fatal(err)
}
log.Println("Setting up JWKS")
if err := setupJwks(); err != nil {
log.Fatal(err)
}
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)
}
}
|
