43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package auth
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import (
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"fmt"
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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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)
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func Middleware(jwtSecret string) gin.HandlerFunc {
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return func(ctx *gin.Context) {
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header := strings.TrimSpace(ctx.GetHeader("Authorization"))
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if header == "" {
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "missing authorization header"})
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return
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}
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parts := strings.SplitN(header, " ", 2)
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if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header"})
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return
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}
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claims := &JWTClaims{}
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token, err := jwt.ParseWithClaims(parts[1], claims, func(token *jwt.Token) (any, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(jwtSecret), nil
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})
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if err != nil || !token.Valid {
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})
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return
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}
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ctx.Set("userID", claims.UserID)
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ctx.Next()
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}
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}
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