all: implement the user interface to change configuration

This is the first web UI (wui) where user can change configuration on
the fly.

The wui is implemented using svelte.dev and can be accessed on
http://127.0.0.1:5380.

1 files changed, 40 insertions, 11 deletions

diff --git a/rescached.go b/rescached.go
index ccb2e39..74fc949 100644
--- a/rescached.go
+++ b/rescached.go
@@ -8,9 +8,11 @@ package rescached
 import (
 	"fmt"
 	"log"
+	"sync"
 
 	"github.com/shuLhan/share/lib/debug"
 	"github.com/shuLhan/share/lib/dns"
+	"github.com/shuLhan/share/lib/http"
 	libio "github.com/shuLhan/share/lib/io"
 )
 
@@ -20,6 +22,9 @@ type Server struct {
 	dns        *dns.Server
 	opts       *Options
 	rcWatcher  *libio.Watcher
+
+	httpd       *http.Server
+	httpdRunner sync.Once
 }
 
 //
@@ -32,21 +37,16 @@ func New(fileConfig string) (srv *Server, err error) {
 		fmt.Printf("rescached: config: %+v\n", opts)
 	}
 
-	dnsServer, err := dns.NewServer(&opts.ServerOptions)
-	if err != nil {
-		return nil, err
-	}
-
-	dnsServer.LoadHostsDir(opts.DirHosts)
-	dnsServer.LoadMasterDir(opts.DirMaster)
-	dnsServer.LoadHostsFile("")
-
 	srv = &Server{
 		fileConfig: fileConfig,
-		dns:        dnsServer,
 		opts:       opts,
 	}
 
+	err = srv.httpdInit()
+	if err != nil {
+		return nil, err
+	}
+
 	return srv, nil
 }
 
@@ -55,6 +55,15 @@ func New(fileConfig string) (srv *Server, err error) {
 // it.
 //
 func (srv *Server) Start() (err error) {
+	srv.dns, err = dns.NewServer(&srv.opts.ServerOptions)
+	if err != nil {
+		return err
+	}
+
+	srv.dns.LoadHostsDir(srv.opts.DirHosts)
+	srv.dns.LoadMasterDir(srv.opts.DirMaster)
+	srv.dns.LoadHostsFile("")
+
 	if len(srv.opts.FileResolvConf) > 0 {
 		srv.rcWatcher, err = libio.NewWatcher(
 			srv.opts.FileResolvConf, 0, srv.watchResolvConf)
@@ -63,7 +72,27 @@ func (srv *Server) Start() (err error) {
 		}
 	}
 
-	return srv.dns.ListenAndServe()
+	go func() {
+		srv.httpdRunner.Do(srv.httpdRun)
+	}()
+
+	go srv.run()
+
+	return nil
+}
+
+func (srv *Server) run() {
+	defer func() {
+		err := recover()
+		if err != nil {
+			log.Println("panic: ", err)
+		}
+	}()
+
+	err := srv.dns.ListenAndServe()
+	if err != nil {
+		log.Println(err)
+	}
 }
 
 //