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Daniel Stenberg 96af350661

CURLMOPT_SOCKETDATA.md: fix typo
 CURLMOPT_TIMERDATA.md: fix typo
 CURLOPT_COOKIELIST.m: quote strings
 CURLOPT_PREREQFUNCTION.md: quote variable names
 CURLOPT_TCP_NODELAY.md: rephrased to please spell checker
 CURLOPT_WILDCARDMATCH.md: rephrased
 libcurl-tutorial.md: use correct option name
 curl_global_init_mem.md: quote headers
 curl_easy_getinfo.md: use correct symbol names in headers
 curl_global_trace.md: quote some headers
 curl_ws_meta.md: quote struct field names
 libcurl-env.md: quote headers

2024-02-19 11:41:12 +01:00

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SPDX-License-Identifier

Title

Section

Source

See-also

curl

CURLOPT_WILDCARDMATCH

libcurl

CURLOPT_CHUNK_BGN_FUNCTION (3)

CURLOPT_CHUNK_END_FUNCTION (3)

CURLOPT_FNMATCH_FUNCTION (3)

CURLOPT_URL (3)

NAME

CURLOPT_WILDCARDMATCH - directory wildcard transfers

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_WILDCARDMATCH, long onoff);

DESCRIPTION

Set onoff to 1 if you want to transfer multiple files according to a filename pattern. The pattern can be specified as part of the CURLOPT_URL(3) option, using an fnmatch-like pattern (Shell Pattern Matching) in the last part of URL (filename).

By default, libcurl uses its internal wildcard matching implementation. You can provide your own matching function by the CURLOPT_FNMATCH_FUNCTION(3) option.

A brief introduction of its syntax follows:

* - ASTERISK

ftp://example.com/some/path/*.txt

matches all .txt files in the root directory. Only two asterisks are allowed within the same pattern string.

? - QUESTION MARK

Question mark matches any (exactly one) character.

ftp://example.com/some/path/photo?.jpg

[ - BRACKET EXPRESSION

The left bracket opens a bracket expression. The question mark and asterisk have no special meaning in a bracket expression. Each bracket expression ends by the right bracket and matches exactly one character. Some examples follow:

[a-zA-Z0-9] or [f-gF-G] - character interval

[abc] - character enumeration

[^abc] or [!abc] - negation

:name: class expression. Supported classes are alnum,lower, space, alpha, digit, print, upper, blank, graph, xdigit.

[][-!^] - special case - matches only '-', ']', '[', '!' or '^'. These characters have no special purpose.

- escape syntax. Matches '[', ']' or 'e'.

Using the rules above, a filename pattern can be constructed:

ftp://example.com/some/path/[a-z[:upper:]\\].jpg

PROTOCOLS

This feature is only supported for FTP download.

EXAMPLE

extern long begin_cb(struct curl_fileinfo *, void *, int);
extern long end_cb(void *ptr);

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    /* turn on wildcard matching */
    curl_easy_setopt(curl, CURLOPT_WILDCARDMATCH, 1L);

    /* callback is called before download of concrete file started */
    curl_easy_setopt(curl, CURLOPT_CHUNK_BGN_FUNCTION, begin_cb);

    /* callback is called after data from the file have been transferred */
    curl_easy_setopt(curl, CURLOPT_CHUNK_END_FUNCTION, end_cb);

    /* See more on https://curl.se/libcurl/c/ftp-wildcard.html */
  }
}

AVAILABILITY

Added in 7.21.0

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

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