[#323] client: Remove xheaders length check in a common helper

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

client/common.go

@@ -57,6 +57,10 @@ func writeXHeadersToMeta(xHeaders []string, h *v2session.RequestMetaHeader) {
 		return
 	}
 
+	if len(xHeaders)%2 != 0 {
+		panic("slice of X-Headers with odd length")
+	}
+
 	hs := make([]v2session.XHeader, len(xHeaders)/2)
 	for i := 0; i < len(xHeaders); i += 2 {
 		hs[i].SetKey(xHeaders[i])

client/object_delete.go

@@ -85,10 +85,6 @@ func (x *PrmObjectDelete) UseKey(key ecdsa.PrivateKey) {
 //
 // Slice must not be mutated until the operation completes.
 func (x *PrmObjectDelete) WithXHeaders(hs ...string) {
-	if len(hs)%2 != 0 {
-		panic("slice of X-Headers with odd length")
-	}
-
 	writeXHeadersToMeta(hs, &x.meta)
 }
 

client/object_get.go

@@ -36,10 +36,6 @@ type prmObjectRead struct {
 //
 // Slice must not be mutated until the operation completes.
 func (x *prmObjectRead) WithXHeaders(hs ...string) {
-	if len(hs)%2 != 0 {
-		panic("slice of X-Headers with odd length")
-	}
-
 	writeXHeadersToMeta(hs, &x.meta)
 }
 

client/object_hash.go

@@ -116,10 +116,6 @@ func (x *PrmObjectHash) UseSalt(salt []byte) {
 //
 // Slice must not be mutated until the operation completes.
 func (x *PrmObjectHash) WithXHeaders(hs ...string) {
-	if len(hs)%2 != 0 {
-		panic("slice of X-Headers with odd length")
-	}
-
 	writeXHeadersToMeta(hs, &x.meta)
 }
 

client/object_put.go

@@ -102,10 +102,6 @@ func (x *PrmObjectPutInit) MarkLocal() {
 //
 // Slice must not be mutated until the operation completes.
 func (x *PrmObjectPutInit) WithXHeaders(hs ...string) {
-	if len(hs)%2 != 0 {
-		panic("slice of X-Headers with odd length")
-	}
-
 	writeXHeadersToMeta(hs, &x.meta)
 }
 

client/object_search.go

@@ -67,10 +67,6 @@ func (x *PrmObjectSearch) WithBearerToken(t bearer.Token) {
 //
 // Slice must not be mutated until the operation completes.
 func (x *PrmObjectSearch) WithXHeaders(hs ...string) {
-	if len(hs)%2 != 0 {
-		panic("slice of X-Headers with odd length")
-	}
-
 	writeXHeadersToMeta(hs, &x.meta)
 }