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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

1.9 KiB

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SPDX-License-Identifier

Title

Section

Source

See-also

Protocol

curl

curl_easy_init

libcurl

curl_easy_cleanup (3)

curl_easy_duphandle (3)

curl_easy_perform (3)

curl_easy_reset (3)

curl_global_init (3)

curl_multi_init (3)

All

NAME

curl_easy_init - Start a libcurl easy session

SYNOPSIS

#include <curl/curl.h>

CURL *curl_easy_init();

DESCRIPTION

This function allocates and returns a CURL easy handle. Such a handle is used as input to other functions in the easy interface. This call must have a corresponding call to curl_easy_cleanup(3) when the operation is complete.

The easy handle is used to hold and control a single network transfer. It is encouraged to reuse easy handles for repeated transfers.

An alternative way to get a new easy handle is to duplicate an already existing one with curl_easy_duphandle(3), which has the upside that it gets all the options that were set in the source handle set in the new copy as well.

If you did not already call curl_global_init(3) before calling this function, curl_easy_init(3) does it automatically. This may be lethal in multi-threaded cases, if curl_global_init(3) is not thread-safe in your system, and it may then result in resource problems because there is no corresponding cleanup.

You are strongly advised to not allow this automatic behavior, by calling curl_global_init(3) yourself properly. See the description in libcurl(3) of global environment requirements for details of how to use this function.

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

AVAILABILITY

Always

RETURN VALUE

If this function returns NULL, something went wrong and you cannot use the other curl functions.

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