[PATCH 1/2] remote-curl: do not call run_slot repeatedly
- From
Jeff King <peff@peff.net>
- Date
- Oct 12, 2012, 07:35 UTC
- Message-ID
- <20121012073533.GA16441@sigill.intra.peff.net>
- In-Reply-To
- <20121012073053.GC17026@sigill.intra.peff.net>
Commit b81401c (http: prompt for credentials on failed POST) taught post_rpc to call run_slot in a loop in order to retry a request after asking the user for credentials. However, after a call to run_slot we will have called finish_active_slot. This means we have released the slot, and we should no longer look at it.
As it happens, this does not cause any bugs in the current code, since we know that we are not using curl_multi in this code path, and therefore nobody will have taken over our slot in the meantime. However, it is good form to actually call get_active_slot again. It also future proofs us against changes in the http code.
We can do this by jumping back to a retry label at the top of our function. We just need to reorder a few setup lines that should not be repeated; everything else within the loop is either idempotent, needs to be repeated, or in a path we do not follow (e.g., we do not even try when large_request is set, because we don't know how much data we might have streamed from our helper program).
Signed-off-by: Jeff King <peff@peff.net> --- Without this future-proofing, the next patch causes test failures.
If the goto is too ugly, we can pull it out into a loop (it just makes the patch harder to read, because the meat of the function gets indented further).
remote-curl.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/remote-curl.c b/remote-curl.c index 6054e47..4281262 100644 --- a/remote-curl.c +++ b/remote-curl.c @@ -444,6 +444,11 @@ static int post_rpc(struct rpc_state *rpc) return -1; } + headers = curl_slist_append(headers, rpc->hdr_content_type); + headers = curl_slist_append(headers, rpc->hdr_accept); + headers = curl_slist_append(headers, "Expect:"); + +retry: slot = get_active_slot(); curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); @@ -451,10 +456,6 @@ static int post_rpc(struct rpc_state *rpc) curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); curl_easy_setopt(slot->curl, CURLOPT_ENCODING, ""); - headers = curl_slist_append(headers, rpc->hdr_content_type); - headers = curl_slist_append(headers, rpc->hdr_accept); - headers = curl_slist_append(headers, "Expect:"); - if (large_request) { /* The request body is large and the size cannot be predicted. * We must use chunked encoding to send it. @@ -528,9 +529,9 @@ static int post_rpc(struct rpc_state *rpc) curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in); curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc); - do { - err = run_slot(slot); - } while (err == HTTP_REAUTH && !large_request && !use_gzip); + err = run_slot(slot); + if (err == HTTP_REAUTH && !large_request && !use_gzip) + goto retry; if (err != HTTP_OK) err = -1;
-- 1.8.0.rc2.3.g303f317