fix auth play

server/web/auth/auth.go

@@ -1,9 +1,14 @@
 package auth
 
 import (
+	"encoding/base64"
 	"encoding/json"
 	"io/ioutil"
+	"net/http"
 	"path/filepath"
+	"reflect"
+	"strings"
+	"unsafe"
 
 	"github.com/gin-gonic/gin"
 
@@ -19,7 +24,7 @@ func SetupAuth(engine *gin.Engine) *gin.RouterGroup {
 	if accs == nil {
 		return nil
 	}
-	return engine.Group("/", gin.BasicAuth(accs))
+	return engine.Group("/", BasicAuth(accs))
 }
 
 func getAccounts() gin.Accounts {
@@ -34,3 +39,62 @@ func getAccounts() gin.Accounts {
 	}
 	return accs
 }
+
+type authPair struct {
+	value string
+	user  string
+}
+type authPairs []authPair
+
+func (a authPairs) searchCredential(authValue string) (string, bool) {
+	if authValue == "" {
+		return "", false
+	}
+	for _, pair := range a {
+		if pair.value == authValue {
+			return pair.user, true
+		}
+	}
+	return "", false
+}
+
+func BasicAuth(accounts gin.Accounts) gin.HandlerFunc {
+	pairs := processAccounts(accounts)
+	return func(c *gin.Context) {
+		user, found := pairs.searchCredential(c.Request.Header.Get("Authorization"))
+		if !found {
+			if strings.HasPrefix(c.FullPath(), "/stream") {
+				c.Set("not_auth", true)
+				return
+			}
+			c.Header("WWW-Authenticate", "Basic realm=Authorization Required")
+			c.AbortWithStatus(http.StatusUnauthorized)
+			return
+		}
+		c.Set(gin.AuthUserKey, user)
+	}
+}
+
+func processAccounts(accounts gin.Accounts) authPairs {
+	pairs := make(authPairs, 0, len(accounts))
+	for user, password := range accounts {
+		value := authorizationHeader(user, password)
+		pairs = append(pairs, authPair{
+			value: value,
+			user:  user,
+		})
+	}
+	return pairs
+}
+
+func authorizationHeader(user, password string) string {
+	base := user + ":" + password
+	return "Basic " + base64.StdEncoding.EncodeToString(StringToBytes(base))
+}
+
+func StringToBytes(s string) (b []byte) {
+	sh := *(*reflect.StringHeader)(unsafe.Pointer(&s))
+	bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	bh.Data, bh.Len, bh.Cap = sh.Data, sh.Len, sh.Len
+	return b
+}