112 lines
2.8 KiB
Markdown
112 lines
2.8 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_WILDCARDMATCH
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_CHUNK_BGN_FUNCTION (3)
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- CURLOPT_CHUNK_END_FUNCTION (3)
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- CURLOPT_FNMATCH_FUNCTION (3)
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- CURLOPT_URL (3)
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---
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# NAME
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CURLOPT_WILDCARDMATCH - directory wildcard transfers
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_WILDCARDMATCH, long onoff);
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~~~
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# DESCRIPTION
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Set *onoff* to 1 if you want to transfer multiple files according to a
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filename pattern. The pattern can be specified as part of the CURLOPT_URL(3)
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option, using an **fnmatch**-like pattern (Shell Pattern Matching) in the last
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part of URL (filename).
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By default, libcurl uses its internal wildcard matching implementation. You
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can provide your own matching function by the
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CURLOPT_FNMATCH_FUNCTION(3) option.
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A brief introduction of its syntax follows:
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## * - ASTERISK
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ftp://example.com/some/path/*.txt
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matches all `.txt` files in the root directory. Only two asterisks are allowed
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within the same pattern string.
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## ? - QUESTION MARK
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Question mark matches any (exactly one) character.
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ftp://example.com/some/path/photo?.jpg
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## [ - BRACKET EXPRESSION
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The left bracket opens a bracket expression. The question mark and asterisk have
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no special meaning in a bracket expression. Each bracket expression ends by the
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right bracket and matches exactly one character. Some examples follow:
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**[a-zA-Z0-9]** or **[f-gF-G]** - character interval
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**[abc]** - character enumeration
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**[^abc]** or **[!abc]** - negation
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**[[:name:]]** class expression. Supported classes are **alnum**,**lower**,
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**space**, **alpha**, **digit**, **print**, **upper**, **blank**, **graph**,
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**xdigit**.
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**[][-!^]** - special case - matches only '-', ']', '[', '!' or '^'. These
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characters have no special purpose.
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**[[]]** - escape syntax. Matches '[', ']' or 'e'.
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Using the rules above, a filename pattern can be constructed:
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ftp://example.com/some/path/[a-z[:upper:]\\].jpg
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# PROTOCOLS
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This feature is only supported for FTP download.
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# EXAMPLE
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~~~c
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extern long begin_cb(struct curl_fileinfo *, void *, int);
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extern long end_cb(void *ptr);
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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/* turn on wildcard matching */
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curl_easy_setopt(curl, CURLOPT_WILDCARDMATCH, 1L);
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/* callback is called before download of concrete file started */
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curl_easy_setopt(curl, CURLOPT_CHUNK_BGN_FUNCTION, begin_cb);
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/* callback is called after data from the file have been transferred */
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curl_easy_setopt(curl, CURLOPT_CHUNK_END_FUNCTION, end_cb);
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/* See more on https://curl.se/libcurl/c/ftp-wildcard.html */
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.21.0
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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