bit of basic oauth code

main.go

@@ -5,6 +5,8 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+	"os"
+	"strings"
 	"text/template"
 
 	"gopkg.in/yaml.v3"
@@ -16,22 +18,27 @@ type ServerConfig struct {
 	Name     string
 	Homepage string
 }
-type AdminConfig struct {
+type PanelConfig struct {
+	Host    string
 	WebRoot string
 	Port    int
 	LogPath string
 }
 type AuthConfig struct {
 	GiteaURL        string
+	ClientID        string
+	ClientSecret    string
 	AuthorizedUsers []string
 }
 type Config struct {
 	Server ServerConfig
-	Admin  AdminConfig
+	Panel  PanelConfig
 	Auth   AuthConfig
 }
 
 var config = new(Config)
+var redirecturi string
+var requesturl string
 
 func loadConfig() (err error) {
 	configfile, err := ioutil.ReadFile("config.yml")
@@ -40,38 +47,118 @@ func loadConfig() (err error) {
 	}
 
 	err = yaml.Unmarshal(configfile, &config)
+
+	// init oauth bits
+	redirecturi = fmt.Sprintf("%s/login/endpoint", config.Panel.Host)
+	requesturl = fmt.Sprintf("%s/login/oauth/authorize?client_id=%s&redirect_uri=%s&response_type=code&state=STATE",
+		strings.Trim(config.Auth.GiteaURL, " "),
+		strings.Trim(config.Auth.ClientID, " "),
+		strings.Trim(redirecturi, " "))
+
 	return err
 }
 
+func openLogFile(logfile string) {
+	if logfile != "" {
+		lf, err := os.OpenFile(logfile, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0640)
+
+		if err != nil {
+			log.Fatal("OpenLogfile: os.OpenFile:", err)
+		}
+
+		log.SetOutput(lf)
+	}
+}
+
+func logRequest(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		log.Printf("%s %s %s\n", r.RemoteAddr, r.Method, r.URL)
+		handler.ServeHTTP(w, r)
+	})
+}
+
+func exists(path string) (bool, error) {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}
+
 func handler(w http.ResponseWriter, r *http.Request) {
 	path := r.URL.Path
-	var tmpl string
+	loc := fmt.Sprintf("templates%s", path)
-	if path == "/" {
+
-		tmpl = "templates/home.html"
+	// var re = regexp.MustCompile(`\.(svg|jpg|jpeg|png|webp|ico|css|js)$`)
-	} else {
+
-		tmpl = fmt.Sprintf("templates/%s", path)
+	// if re.MatchString(path) {
+	// 	http.StripPrefix("/resources/",
+	// 		http.FileServer(http.Dir("./resources")))
+	// 	return
+	// }
+
+	exists, err := exists(loc)
+	if err != nil {
+		log.Fatal(err)
 	}
-	t, _ := template.ParseFiles(tmpl)
+
-	t.Execute(w, config)
+	if !exists {
+		http.NotFound(w, r)
+		return
+	}
+
+	var tmpl string
+
+	switch path {
+	case "/":
+		tmpl = "templates/home.html"
+		t, _ := template.ParseFiles(tmpl)
+		t.Execute(w, config)
+	default:
+		tmpl = fmt.Sprintf("templates%s", path)
+		t, _ := template.ParseFiles(tmpl)
+		t.Execute(w, config)
+	}
+}
+
+func loginHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.URL.Path {
+	case "/login", "/login/":
+		http.Redirect(w, r, requesturl, http.StatusFound)
+	case "/login/endpoint", "/login/endpoint/":
+		loginEndpoint(w, r)
+	}
+}
+
+func loginEndpoint(w http.ResponseWriter, r *http.Request) {
+	token := r.FormValue("code")
+	fmt.Print(token)
 }
 
 func main() {
 	err := loadConfig()
-	fmt.Print(config)
 
 	if err != nil {
 		log.Fatalf("couldn't load config: %s", err)
 	}
 
+	openLogFile(config.Panel.LogPath)
+	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+
+	http.HandleFunc("/login/", loginHandler)
 	http.Handle("/resources/",
 		http.StripPrefix("/resources/",
 			http.FileServer(http.Dir("./resources"))))
-
 	http.HandleFunc("/", handler)
 
-	err = http.ListenAndServe(":8080", nil)
+	fmt.Printf("listening on %v\n", config.Panel.Port)
+	fmt.Printf("Logging to %v\n", config.Panel.LogPath)
+
+	err = http.ListenAndServe(fmt.Sprintf(":%d", config.Panel.Port), logRequest(http.DefaultServeMux))
 	if err != nil {
 		log.Fatal(err)
 	}
-
 }

resources/main.css

@@ -4,12 +4,12 @@
 
 @layer base {
     .login {
-        @apply flex flex-row justify-center items-center m-auto shadow-md bg-slate-50 p-6 rounded px-10 border-t-4 border-t-emerald-700
+        @apply flex flex-row justify-center items-center m-auto shadow-md bg-slate-50 p-6 pb-8 rounded px-10 border-t-4 border-t-emerald-700
     }
 }
 
 @layer components {
-    button {
+    .button {
         @apply w-full bg-gradient-to-t from-emerald-800 to-emerald-700 text-slate-100 rounded py-2 shadow-sm shadow-emerald-800 hover:opacity-95 font-bold;
     }
     input {

templates/home.html

@@ -12,18 +12,10 @@
 <body class="bg-slate-200 flex min-h-screen">
     <div class="login">
         <form>
-            <h3 class="font-bold mb-3 text-lg">Log in to {{.Server.Name}}</h3>
+            <h3 class="font-bold mb-6 text-lg text-center">Log in to {{.Server.Name}} Admin</h3>
-            <div class="w-full my-2">
+            <a href="/login" class="button my-10 px-16">
-                <label for="username">Username</label>
+                Log In With Gitea
-                <input name="username" type="text">
+            </a>
-            </div>
-            <div class="w-full my-2">
-                <label for="password">Password</label>
-                <input name="password" type="password">
-            </div>
-            <button class="my-2">
-                Log In
-            </button>
         </form>
     </div>
 </body>