remote-curl: reset headers on new request

When we retry a post_rpc request, we currently reuse the same headers as
before.  In the future, we'd like to be able to modify them based on the
result we get back, so let's reset them on each retry so we can avoid
sending potentially duplicate headers if the values change.

Signed-off-by: brian m. carlson <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: bk2204

remote-curl.c

@@ -893,7 +893,7 @@ static curl_off_t xcurl_off_t(size_t len)
 static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_received)
 {
 	struct active_request_slot *slot;
-	struct curl_slist *headers = http_copy_default_headers();
+	struct curl_slist *headers = NULL;
 	int use_gzip = rpc->gzip_request;
 	char *gzip_body = NULL;
 	size_t gzip_size = 0;
@@ -935,6 +935,8 @@ static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_rece
 			needs_100_continue = 1;
 	}
 
+retry:
+	headers = http_copy_default_headers();
 	headers = curl_slist_append(headers, rpc->hdr_content_type);
 	headers = curl_slist_append(headers, rpc->hdr_accept);
 	headers = curl_slist_append(headers, needs_100_continue ?
@@ -948,7 +950,6 @@ static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_rece
 	if (rpc->protocol_header)
 		headers = curl_slist_append(headers, rpc->protocol_header);
 
-retry:
 	slot = get_active_slot();
 
 	curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
@@ -1044,6 +1045,7 @@ static int post_rpc(struct rpc_state *rpc, int stateless_connect, int flush_rece
 	err = run_slot(slot, NULL);
 	if (err == HTTP_REAUTH && !large_request) {
 		credential_fill(&http_auth);
+		curl_slist_free_all(headers);
 		goto retry;
 	}
 	if (err != HTTP_OK)