[PATCH v3 4/5] remote-curl: unset CURLOPT_FAILONERROR

[Masaya Suzuki <masayasuzuki@google.com>]

By not setting CURLOPT_FAILONERROR, curl parses the HTTP response
headers even if the response is an error. This makes GIT_CURL_VERBOSE to
show the HTTP headers, which is useful for debugging.

Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
---
 remote-curl.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/remote-curl.c b/remote-curl.c
index d4673b6e8c..91b39ca098 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -547,6 +547,7 @@ static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
 
 struct rpc_in_data {
 	struct rpc_state *rpc;
+	struct active_request_slot *slot;
 };
 
 /*
@@ -558,6 +559,13 @@ static size_t rpc_in(char *ptr, size_t eltsize,
 {
 	size_t size = eltsize * nmemb;
 	struct rpc_in_data *data = buffer_;
+	long response_code;
+
+	if (curl_easy_getinfo(data->slot->curl, CURLINFO_RESPONSE_CODE,
+			      &response_code) != CURLE_OK)
+		return size;
+	if (response_code >= 300)
+		return size;
 	if (size)
 		data->rpc->any_written = 1;
 	write_or_die(data->rpc->in, ptr, size);
@@ -774,7 +782,9 @@ static int post_rpc(struct rpc_state *rpc)
 	curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 	rpc_in_data.rpc = rpc;
+	rpc_in_data.slot = slot;
 	curl_easy_setopt(slot->curl, CURLOPT_FILE, &rpc_in_data);
+	curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
 
 
 	rpc->any_written = 0;
-- 
2.20.1.97.g81188d93c3-goog