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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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95
docs/examples/multi-post.c
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@ -33,77 +33,82 @@
int main(void)
{
CURL *curl;
CURLM *multi_handle;
int still_running = 0;
curl_mime *form = NULL;
curl_mimepart *field = NULL;
struct curl_slist *headerlist = NULL;
static const char buf[] = "Expect:";
CURL *curl;
CURLcode res = curl_global_init(CURL_GLOBAL_ALL);
if(res)
return (int)res;
curl = curl_easy_init();
multi_handle = curl_multi_init();
if(curl) {
CURLM *multi_handle;
if(curl && multi_handle) {
/* Create the form */
form = curl_mime_init(curl);
multi_handle = curl_multi_init();
if(multi_handle) {
int still_running = 0;
/* Fill in the file upload field */
field = curl_mime_addpart(form);
curl_mime_name(field, "sendfile");
curl_mime_filedata(field, "multi-post.c");
/* Create the form */
form = curl_mime_init(curl);
/* Fill in the filename field */
field = curl_mime_addpart(form);
curl_mime_name(field, "filename");
curl_mime_data(field, "multi-post.c", CURL_ZERO_TERMINATED);
/* Fill in the file upload field */
field = curl_mime_addpart(form);
curl_mime_name(field, "sendfile");
curl_mime_filedata(field, "multi-post.c");
/* Fill in the submit field too, even if this is rarely needed */
field = curl_mime_addpart(form);
curl_mime_name(field, "submit");
curl_mime_data(field, "send", CURL_ZERO_TERMINATED);
/* Fill in the filename field */
field = curl_mime_addpart(form);
curl_mime_name(field, "filename");
curl_mime_data(field, "multi-post.c", CURL_ZERO_TERMINATED);
/* initialize custom header list (stating that Expect: 100-continue is not
wanted */
headerlist = curl_slist_append(headerlist, buf);
/* Fill in the submit field too, even if this is rarely needed */
field = curl_mime_addpart(form);
curl_mime_name(field, "submit");
curl_mime_data(field, "send", CURL_ZERO_TERMINATED);
/* what URL that receives this POST */
curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/upload.cgi");
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
/* initialize custom header list (stating that Expect: 100-continue is
not wanted */
headerlist = curl_slist_append(headerlist, buf);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
/* what URL that receives this POST */
curl_easy_setopt(curl, CURLOPT_URL,
"https://www.example.com/upload.cgi");
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
curl_multi_add_handle(multi_handle, curl);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
do {
CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
curl_multi_add_handle(multi_handle, curl);
if(still_running)
/* wait for activity, timeout or "nothing" */
mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
do {
CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
if(mc)
break;
} while(still_running);
if(still_running)
/* wait for activity, timeout or "nothing" */
mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
curl_multi_cleanup(multi_handle);
if(mc)
break;
} while(still_running);
curl_multi_cleanup(multi_handle);
}
/* always cleanup */
curl_easy_cleanup(curl);
/* then cleanup the form */
curl_mime_free(form);
/* free slist */
curl_slist_free_all(headerlist);
}
/* then cleanup the form */
curl_mime_free(form);
/* free slist */
curl_slist_free_all(headerlist);
curl_global_cleanup();
return 0;
}