[#134] Support percent-encoding

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>

CHANGELOG.md

@@ -5,6 +5,7 @@ This document outlines major changes between releases.
 ## [Unreleased]
 
 ## [0.30.2] - 2024-09-03
+- Support percent-encoding for GET queries (#134)
 
 ### Added
 - Fuzzing tests (#135)

internal/handler/handler.go

@@ -195,6 +195,12 @@ func (h *Handler) byObjectName(req *fasthttp.RequestCtx, f func(context.Context,
 		log        = h.log.With(zap.String("bucketname", bucketname), zap.String("key", key))
 	)
 
+	unescapedKey, err := url.QueryUnescape(key)
+	if err != nil {
+		logAndSendBucketError(req, log, err)
+		return
+	}
+
 	ctx := utils.GetContextFromRequest(req)
 
 	bktInfo, err := h.getBucketInfo(ctx, bucketname, log)
@@ -203,7 +209,7 @@ func (h *Handler) byObjectName(req *fasthttp.RequestCtx, f func(context.Context,
 		return
 	}
 
-	foundOid, err := h.tree.GetLatestVersion(ctx, &bktInfo.CID, key)
+	foundOid, err := h.tree.GetLatestVersion(ctx, &bktInfo.CID, unescapedKey)
 	if err != nil {
 		if errors.Is(err, tree.ErrNodeAccessDenied) {
 			response.Error(req, "Access Denied", fasthttp.StatusForbidden)