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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

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SPDX-License-Identifier

Title

Section

Source

See-also

Protocol

curl

curl_unescape

libcurl

RFC 2396

curl_easy_escape (3)

curl_easy_unescape (3)

curl_free (3)

All

NAME

curl_unescape - URL decodes the given string

SYNOPSIS

#include <curl/curl.h>

char *curl_unescape(const char *input, int length);

DESCRIPTION

Obsolete function. Use curl_easy_unescape(3) instead.

This function converts the URL encoded string input to a "plain string" and return that as a new allocated string. All input characters that are URL encoded (%XX where XX is a two-digit hexadecimal number) are converted to their plain text versions.

If the length argument is set to 0, curl_unescape(3) calls strlen() on input to find out the size.

You must curl_free(3) the returned string when you are done with it.

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    char *decoded = curl_unescape("%63%75%72%6c", 12);
    if(decoded) {
      /* do not assume printf() works on the decoded data */
      printf("Decoded: ");
      /* ... */
      curl_free(decoded);
    }
  }
}

AVAILABILITY

Since 7.15.4, curl_easy_unescape(3) should be used. This function might be removed in a future release.

RETURN VALUE

A pointer to a null-terminated string or NULL if it failed.

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