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docs: multi-uv: don't use CURLMsg after cleanup

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Andrei Sedoi 2016-11-02 09:00:20 +00:00 • committed by Daniel Stenberg
parent b1aeed302d
commit e6882ce484
1 changed files with 12 additions and 5 deletions
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17
docs/examples/multi-uv.c
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@ -104,18 +104,25 @@ static void check_multi_info(void)
char *done_url;
CURLMsg *message;
int pending;
CURL *easy_handle;
FILE *file;
while((message = curl_multi_info_read(curl_handle, &pending))) {
switch(message->msg) {
case CURLMSG_DONE:
curl_easy_getinfo(message->easy_handle, CURLINFO_EFFECTIVE_URL,
&done_url);
curl_easy_getinfo(message->easy_handle, CURLINFO_PRIVATE, &file);
/* Do not use message data after calling curl_multi_remove_handle() and
curl_easy_cleanup(). As per curl_multi_info_read() docs:
"WARNING: The data the returned pointer points to will not survive
calling curl_multi_cleanup, curl_multi_remove_handle or
curl_easy_cleanup." */
easy_handle = message->easy_handle;
curl_easy_getinfo(easy_handle, CURLINFO_EFFECTIVE_URL, &done_url);
curl_easy_getinfo(easy_handle, CURLINFO_PRIVATE, &file);
printf("%s DONE\n", done_url);
curl_multi_remove_handle(curl_handle, message->easy_handle);
curl_easy_cleanup(message->easy_handle);
curl_multi_remove_handle(curl_handle, easy_handle);
curl_easy_cleanup(easy_handle);
if(file) {
fclose(file);
}