onasty/internal/transport/http/apiv1/middleware.go(view raw)
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package apiv1
import (
"context"
"strings"
"time"
"github.com/gin-gonic/gin"
"github.com/gofrs/uuid/v5"
"github.com/olexsmir/onasty/internal/metrics"
"github.com/olexsmir/onasty/internal/models"
)
const userIDCtxKey = "userID"
// authorizedMiddleware is a middleware that checks if user is authorized
// and if so sets user metadata to context
//
// being authorized is required for making the request for specific endpoint
func (a *APIV1) authorizedMiddleware(c *gin.Context) {
token, ok := getTokenFromAuthHeaders(c)
if !ok {
errorResponse(c, ErrUnauthorized)
return
}
uid, err := a.validateAuthorizedUser(c.Request.Context(), token)
if err != nil {
errorResponse(c, err)
return
}
c.Set(userIDCtxKey, uid)
c.Next()
}
// couldBeAuthorizedMiddleware is a middleware that checks if user is authorized and
// if so sets user metadata to context
//
// it is NOT required to be authorized for making the request for specific endpoint
func (a *APIV1) couldBeAuthorizedMiddleware(c *gin.Context) {
token, ok := getTokenFromAuthHeaders(c)
if ok {
uid, err := a.validateAuthorizedUser(c.Request.Context(), token)
if err != nil {
errorResponse(c, err)
return
}
c.Set(userIDCtxKey, uid)
}
c.Next()
}
func (a *APIV1) metricsMiddleware(c *gin.Context) {
start := time.Now()
c.Next()
latency := time.Since(start)
metrics.RecordLatencyRequestMetric(c.Request.Method, c.Request.RequestURI, latency)
if c.Writer.Status() >= 200 && c.Writer.Status() < 300 {
metrics.RecordSuccessfulRequestMetric(c.Request.Method, c.Request.RequestURI)
}
if c.Writer.Status() >= 400 {
metrics.RecordFailedRequestMetric(c.Request.Method, c.Request.RequestURI)
}
}
func getTokenFromAuthHeaders(c *gin.Context) (token string, ok bool) { //nolint:nonamedreturns
header := c.GetHeader("Authorization")
if header == "" {
return "", false
}
headerParts := strings.Split(header, " ")
if len(headerParts) != 2 && headerParts[0] != "Bearer" {
return "", false
}
if len(headerParts[1]) == 0 {
return "", false
}
return headerParts[1], true
}
// getUserId returns userId from the context
// getting user id is only possible if user is authorized
// if userID is not set, [uuid.Nil] will be returned.
func (a *APIV1) getUserID(c *gin.Context) uuid.UUID {
userID, exists := c.Get(userIDCtxKey)
if !exists {
return uuid.Nil
}
uid, ok := userID.(uuid.UUID)
if !ok {
return uuid.Nil
}
return uid
}
func (a *APIV1) validateAuthorizedUser(ctx context.Context, accessToken string) (uuid.UUID, error) {
tokenPayload, err := a.usersrv.ParseJWTToken(accessToken)
if err != nil {
return uuid.Nil, err
}
userID := uuid.Must(uuid.FromString(tokenPayload.UserID))
ok, err := a.usersrv.CheckIfUserExists(ctx, userID)
if err != nil {
return uuid.Nil, err
}
if !ok {
return uuid.Nil, ErrUnauthorized
}
ok, err = a.usersrv.CheckIfUserIsActivated(ctx, userID)
if err != nil {
return uuid.Nil, err
}
if !ok {
return uuid.Nil, models.ErrUserIsNotActivated
}
return userID, nil
}
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