55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package api
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import (
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"errors"
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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/itsscb/df/bff/token"
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)
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const (
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authorizationHeaderKey = "authorization"
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authorizationTypeBearer = "bearer"
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authorizationPayloadKey = "authorization_payload"
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)
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// AuthMiddleware creates a gin middleware for authorization
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func authMiddleware(tokenMaker token.Maker) gin.HandlerFunc {
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return func(ctx *gin.Context) {
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authorizationHeader := ctx.GetHeader(authorizationHeaderKey)
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if len(authorizationHeader) == 0 {
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err := errors.New("authorization header is not provided")
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, errorResponse(err))
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return
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}
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fields := strings.Fields(authorizationHeader)
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if len(fields) < 2 {
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err := errors.New("invalid authorization header format")
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, errorResponse(err))
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return
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}
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authorizationType := strings.ToLower(fields[0])
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if authorizationType != authorizationTypeBearer {
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err := fmt.Errorf("unsupported authorization type %s", authorizationType)
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, errorResponse(err))
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return
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}
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accessToken := fields[1]
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payload, err := tokenMaker.VerifyToken(accessToken)
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if err != nil {
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ctx.AbortWithStatusJSON(http.StatusUnauthorized, errorResponse(err))
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return
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}
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ctx.Set(authorizationPayloadKey, payload)
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ctx.Next()
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}
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}
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