50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
package middleware
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import (
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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"net/http"
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"os"
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"time"
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"udemy_httpserver/models"
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)
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func RequireAuth(c *gin.Context) {
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// Get JWT from cookie
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tokenString := c.GetHeader("Authorization")
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if tokenString == "" {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
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c.Abort()
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return
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}
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tokenString = tokenString[7:] // Remove "Bearer " from the token
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// Decode/validate it
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token, _ := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
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// Don't forget to validate the alg is what you expect:
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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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// hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
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return []byte(os.Getenv("JWT_SECRET")), nil
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})
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if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
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// Check the expiry date
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if float64(time.Now().Unix()) > claims["exp"].(float64) {
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c.AbortWithStatus(http.StatusUnauthorized)
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}
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// Validate that the user exists in the database
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user, err := models.FindOneByID(int(claims["sub"].(float64)))
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if err != nil || user == nil {
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c.AbortWithStatus(http.StatusUnauthorized)
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}
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c.Set("user", user)
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c.Next()
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} else {
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c.AbortWithStatus(http.StatusUnauthorized)
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}
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}
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