68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
package middleware
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import (
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"net/http"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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"git.gobha.me/xcaliber/chat-switchboard/config"
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"git.gobha.me/xcaliber/chat-switchboard/database"
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)
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// Claims represents the JWT payload.
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type Claims struct {
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UserID string `json:"user_id"`
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Email string `json:"email"`
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jwt.RegisteredClaims
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}
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// Auth returns a Gin middleware that validates JWT bearer tokens.
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// When no database is connected (unmanaged mode), all requests
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// are allowed through without authentication.
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func Auth(cfg *config.Config) gin.HandlerFunc {
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return func(c *gin.Context) {
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// Skip auth when running without a database (unmanaged mode)
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if !database.IsConnected() {
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c.Next()
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return
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}
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header := c.GetHeader("Authorization")
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if header == "" {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
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"error": "missing authorization header",
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})
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return
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}
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tokenString := strings.TrimPrefix(header, "Bearer ")
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if tokenString == header {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
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"error": "invalid authorization format",
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})
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return
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}
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claims := &Claims{}
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token, err := jwt.ParseWithClaims(tokenString, claims, func(t *jwt.Token) (interface{}, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, jwt.ErrSignatureInvalid
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}
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return []byte(cfg.JWTSecret), nil
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})
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if err != nil || !token.Valid {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
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"error": "invalid or expired token",
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})
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return
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}
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// Store claims in context for downstream handlers
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c.Set("user_id", claims.UserID)
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c.Set("email", claims.Email)
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c.Next()
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}
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} |