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examples: check more errors, fix cleanups, scope variables

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Inspired by Joshua's report on examples.

Closes #19055
This commit is contained in:
Viktor Szakats 2025-10-13 22:57:01 +02:00
parent 61dcb56743
commit 64ed2ea196
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GPG key ID: B5ABD165E2AEF201
42 changed files with 874 additions and 785 deletions
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85
docs/examples/multi-app.c
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@ -37,21 +37,17 @@
* Download an HTTP file and upload an FTP file simultaneously.
*/
#define HANDLECOUNT 2 /* Number of simultaneous transfers */
#define HTTP_HANDLE 0 /* Index for the HTTP transfer */
#define FTP_HANDLE 1 /* Index for the FTP transfer */
#define HANDLECOUNT 2 /* Number of simultaneous transfers */
int main(void)
{
CURL *handles[HANDLECOUNT];
CURLM *multi_handle;
int still_running = 1; /* keep number of running handles */
int i;
CURLMsg *msg; /* for picking up messages with the transfer status */
int msgs_left; /* how many messages are left */
CURLcode res = curl_global_init(CURL_GLOBAL_ALL);
if(res)
return (int)res;
@ -68,52 +64,63 @@ int main(void)
/* init a multi stack */
multi_handle = curl_multi_init();
if(multi_handle) {
/* add the individual transfers */
for(i = 0; i < HANDLECOUNT; i++)
curl_multi_add_handle(multi_handle, handles[i]);
int still_running = 1; /* keep number of running handles */
while(still_running) {
CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
CURLMsg *msg; /* for picking up messages with the transfer status */
int msgs_left; /* how many messages are left */
if(still_running)
/* wait for activity, timeout or "nothing" */
mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
/* add the individual transfers */
for(i = 0; i < HANDLECOUNT; i++)
curl_multi_add_handle(multi_handle, handles[i]);
if(mc)
break;
}
/* See how the transfers went */
/* !checksrc! disable EQUALSNULL 1 */
while((msg = curl_multi_info_read(multi_handle, &msgs_left)) != NULL) {
if(msg->msg == CURLMSG_DONE) {
int idx;
while(still_running) {
CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
/* Find out which handle this message is about */
for(idx = 0; idx < HANDLECOUNT; idx++) {
int found = (msg->easy_handle == handles[idx]);
if(found)
if(still_running)
/* wait for activity, timeout or "nothing" */
mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
if(mc)
break;
}
/* See how the transfers went */
/* !checksrc! disable EQUALSNULL 1 */
while((msg = curl_multi_info_read(multi_handle, &msgs_left)) != NULL) {
if(msg->msg == CURLMSG_DONE) {
int idx;
/* Find out which handle this message is about */
for(idx = 0; idx < HANDLECOUNT; idx++) {
int found = (msg->easy_handle == handles[idx]);
if(found)
break;
}
switch(idx) {
case HTTP_HANDLE:
printf("HTTP transfer completed with status %d\n", msg->data.result);
break;
}
switch(idx) {
case HTTP_HANDLE:
printf("HTTP transfer completed with status %d\n", msg->data.result);
break;
case FTP_HANDLE:
printf("FTP transfer completed with status %d\n", msg->data.result);
break;
case FTP_HANDLE:
printf("FTP transfer completed with status %d\n", msg->data.result);
break;
}
}
}
/* remove the transfers */
for(i = 0; i < HANDLECOUNT; i++)
curl_multi_remove_handle(multi_handle, handles[i]);
curl_multi_cleanup(multi_handle);
}
/* remove the transfers and cleanup the handles */
for(i = 0; i < HANDLECOUNT; i++) {
curl_multi_remove_handle(multi_handle, handles[i]);
/* Free the curl handles */
for(i = 0; i < HANDLECOUNT; i++)
curl_easy_cleanup(handles[i]);
}
curl_multi_cleanup(multi_handle);
curl_global_cleanup();
return 0;