curl_slist_append - add a string to an slist
#include <curl/curl.h>
struct curl_slist *curl_slist_append(struct curl_slist *list,
const char *string);
curl_slist_append(3) appends a string to a linked list of strings. The
existing list should be passed as the first argument and the new list
is returned from this function. Pass in NULL in the list argument to
create a new list. The specified string has been appended when this
function returns. curl_slist_append(3) copies the string.
The list should be freed again (after usage) with
curl_slist_free_all(3).
CURL *handle;
struct curl_slist *slist=NULL;
struct curl_slist *temp=NULL;
slist = curl_slist_append(slist, "pragma:");
if (slist == NULL)
return -1;
temp = curl_slist_append(slist, "Accept:")
if (temp == NULL) {
curl_slist_free_all(slist);
return -1;
}
slist = temp;
curl_easy_setopt(handle, CURLOPT_HTTPHEADER, slist);
curl_easy_perform(handle);
curl_slist_free_all(slist); /* free the list again */
A null pointer is returned if anything went wrong, otherwise the new list
pointer is returned. To avoid overwriting an existing non-empty list on
failure, the new list should be returned to a temporary variable which can be
tested for NULL before updating the original list pointer.