frostfs-s3-gw/api/user_auth.go

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package api
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import (
"context"
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"net/http"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
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"github.com/gorilla/mux"
"go.uber.org/zap"
)
// KeyWrapper is wrapper for context keys.
type KeyWrapper string
// BoxData is an ID used to store accessbox.Box in a context.
var BoxData = KeyWrapper("__context_box_key")
// ClientTime is an ID used to store client time.Time in a context.
var ClientTime = KeyWrapper("__context_client_time")
// AuthMiddleware adds user authentication via center to router using log for logging.
func AuthMiddleware(log *zap.Logger, center auth.Center) mux.MiddlewareFunc {
return func(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var ctx context.Context
box, err := center.Authenticate(r)
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if err != nil {
if err == auth.ErrNoAuthorizationHeader {
log.Debug("couldn't receive access box for gate key, random key will be used")
ctx = r.Context()
} else {
log.Error("failed to pass authentication", zap.Error(err))
if _, ok := err.(errors.Error); !ok {
err = errors.GetAPIError(errors.ErrAccessDenied)
}
WriteErrorResponse(w, GetReqInfo(r.Context()), err)
return
}
} else {
ctx = context.WithValue(r.Context(), BoxData, box.AccessBox)
if !box.ClientTime.IsZero() {
ctx = context.WithValue(ctx, ClientTime, box.ClientTime)
}
}
h.ServeHTTP(w, r.WithContext(ctx))
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})
}
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}