135 lines
2.8 KiB
Go
135 lines
2.8 KiB
Go
package main
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"log"
|
|
"net"
|
|
"net/url"
|
|
"strings"
|
|
)
|
|
|
|
var configPath = "config"
|
|
|
|
func main() {
|
|
flag.StringVar(&configPath, "config", configPath, "path to configuration file")
|
|
flag.Parse()
|
|
|
|
cfg, err := Load(configPath)
|
|
if err != nil {
|
|
log.Fatalf("failed to load config file: %v", err)
|
|
}
|
|
|
|
srv := NewServer()
|
|
|
|
for _, d := range cfg.Children {
|
|
var err error
|
|
switch d.Name {
|
|
case "frontend":
|
|
err = parseFrontend(srv, d)
|
|
case "tls":
|
|
err = parseTLS(srv, d)
|
|
default:
|
|
log.Fatalf("unknown %q directive", d.Name)
|
|
}
|
|
if err != nil {
|
|
log.Fatalf("directive %q: %v", d.Name, err)
|
|
}
|
|
}
|
|
|
|
if err := srv.Start(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
select {}
|
|
}
|
|
|
|
func parseFrontend(srv *Server, d *Directive) error {
|
|
frontend := &Frontend{Server: srv}
|
|
srv.Frontends = append(srv.Frontends, frontend)
|
|
|
|
// TODO: support multiple backends
|
|
backendDirective := d.ChildByName("backend")
|
|
if backendDirective == nil {
|
|
return fmt.Errorf("missing backend directive in frontend block")
|
|
}
|
|
if err := parseBackend(&frontend.Backend, backendDirective); err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, listenAddr := range d.Params {
|
|
host, port, err := net.SplitHostPort(listenAddr)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to parse listen address %q: %v", listenAddr, err)
|
|
}
|
|
|
|
// TODO: come up with something more robust
|
|
var name string
|
|
if host != "" && host != "localhost" && net.ParseIP(host) == nil {
|
|
name = host
|
|
host = ""
|
|
|
|
srv.ManagedNames = append(srv.ManagedNames, name)
|
|
}
|
|
|
|
addr := net.JoinHostPort(host, port)
|
|
|
|
ln := srv.RegisterListener(addr)
|
|
if err := ln.RegisterFrontend(name, frontend); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func parseBackend(backend *Backend, d *Directive) error {
|
|
var backendURI string
|
|
if err := d.ParseParams(&backendURI); err != nil {
|
|
return err
|
|
}
|
|
if !strings.Contains(backendURI, ":/") {
|
|
// This is a raw domain name, make it an URL with an empty scheme
|
|
backendURI = "//" + backendURI
|
|
}
|
|
|
|
u, err := url.Parse(backendURI)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to parse backend URI %q: %v", backendURI, err)
|
|
}
|
|
|
|
if strings.HasSuffix(u.Scheme, "+proxy") {
|
|
u.Scheme = strings.TrimSuffix(u.Scheme, "+proxy")
|
|
backend.Proxy = true
|
|
}
|
|
|
|
switch u.Scheme {
|
|
case "", "tcp":
|
|
backend.Network = "tcp"
|
|
backend.Address = u.Host
|
|
case "unix":
|
|
backend.Network = "unix"
|
|
backend.Address = u.Host
|
|
default:
|
|
return fmt.Errorf("failed to setup backend %q: unsupported URI scheme", backendURI)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func parseTLS(srv *Server, d *Directive) error {
|
|
for _, child := range d.Children {
|
|
switch child.Name {
|
|
case "acme_ca":
|
|
var caURL string
|
|
if err := child.ParseParams(&caURL); err != nil {
|
|
return err
|
|
}
|
|
srv.acmeManager.CA = caURL
|
|
default:
|
|
return fmt.Errorf("unknown %q directive", child.Name)
|
|
}
|
|
}
|
|
return nil
|
|
}
|