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Daniel Stenberg e3fe020089

docs/libcurl: generate PROTOCOLS from meta-data

Remove the PROTOCOLS section from the source files completely and
instead generate them based on the header data in the curldown files.

It also generates TLS backend information for options marked for TLS as
protocol.

Closes #13175

2024-03-23 18:13:03 +01:00

1.6 KiB

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SPDX-License-Identifier

Title

Section

Source

See-also

Protocol

curl

curl_slist_append

libcurl

curl_slist_free_all (3)

All

NAME

curl_slist_append - add a string to an slist

SYNOPSIS

#include <curl/curl.h>

struct curl_slist *curl_slist_append(struct curl_slist *list,
                                     const char *string);

DESCRIPTION

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).

EXAMPLE

int main(void)
{
  CURL *handle;
  struct curl_slist *slist = NULL;
  struct curl_slist *temp = NULL;

  slist = curl_slist_append(slist, "pragma:");

  if(!slist)
    return -1;

  temp = curl_slist_append(slist, "Accept:");

  if(!temp) {
    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 */
}

AVAILABILITY

Always

RETURN VALUE

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.

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