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25 lines
715 B
Text
25 lines
715 B
Text
##! Functions for URL handling.
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## A regular expression for matching and extracting URLs.
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const url_regex = /^([a-zA-Z\-]{3,5})(:\/\/[^\/?#"'\r\n><]*)([^?#"'\r\n><]*)([^[:blank:]\r\n"'><]*|\??[^"'\r\n><]*)/ &redef;
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## Extracts URLs discovered in arbitrary text.
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function find_all_urls(s: string): string_set
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{
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return find_all(s, url_regex);
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}
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## Extracts URLs discovered in arbitrary text without
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## the URL scheme included.
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function find_all_urls_without_scheme(s: string): string_set
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{
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local urls = find_all_urls(s);
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local return_urls: set[string] = set();
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for ( url in urls )
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{
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local no_scheme = sub(url, /^([a-zA-Z\-]{3,5})(:\/\/)/, "");
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add return_urls[no_scheme];
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}
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return return_urls;
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}
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