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multi_socket: improved 100-continue timeout handling

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When waiting for a 100-continue response from the server, the
Curl_readwrite() will refuse to run if called until the timeout has been
reached.

We timeout code in multi_socket() allows code to run slightly before the
actual timeout time, so for test 154 it could lead to the function being
executed but refused in Curl_readwrite() and then the application would
just sit idling forever.

This was detected with runtests.pl -e on test 154.
This commit is contained in:
Daniel Stenberg
2013-08-27 22:32:51 +02:00
parent 3d1a453d88
commit a691e04470
4 changed files with 16 additions and 18 deletions
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12
lib/easy.c
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@@ -489,7 +489,6 @@ static int events_timer(CURLM *multi, /* multi handle */
ev->ms = timeout_ms;
ev->msbump = TRUE;
/* fprintf(stderr, "%s: timeout %ld\n", __func__, timeout_ms); */
return 0;
}
@@ -647,8 +646,6 @@ static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
/* get the time stamp to use to figure out how long poll takes */
before = curlx_tvnow();
/* fprintf(stderr, "poll(), %d numfds\n", numfds); */
/* wait for activity or timeout */
pollrc = Curl_poll(fds, numfds, (int)ev->ms);
@@ -793,15 +790,14 @@ static CURLcode easy_transfer(CURLM *multi)
* DEBUG: if 'events' is set TRUE, this function will use a replacement engine
* instead of curl_multi_perform() and use curl_multi_socket_action().
*/
static CURLcode easy_perform(CURL *easy, bool events)
static CURLcode easy_perform(struct SessionHandle *data, bool events)
{
CURLM *multi;
CURLMcode mcode;
CURLcode code = CURLE_OK;
struct SessionHandle *data = easy;
SIGPIPE_VARIABLE(pipe_st);
if(!easy)
if(!data)
return CURLE_BAD_FUNCTION_ARGUMENT;
if(data->multi) {
@@ -823,7 +819,7 @@ static CURLcode easy_perform(CURL *easy, bool events)
/* Copy the MAXCONNECTS option to the multi handle */
curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, data->set.maxconnects);
mcode = curl_multi_add_handle(multi, easy);
mcode = curl_multi_add_handle(multi, data);
if(mcode) {
curl_multi_cleanup(multi);
if(mcode == CURLM_OUT_OF_MEMORY)
@@ -843,7 +839,7 @@ static CURLcode easy_perform(CURL *easy, bool events)
/* ignoring the return code isn't nice, but atm we can't really handle
a failure here, room for future improvement! */
(void)curl_multi_remove_handle(multi, easy);
(void)curl_multi_remove_handle(multi, data);
sigpipe_restore(&pipe_st);