Find URI in text: Difference between revisions
Added Go
Thundergnat (talk | contribs) (→{{header|Perl 6}}: Update to current code) |
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'''Extra Credit:''' implement the parser to match the IRI specification in RFC 3987.
=={{header|Go}}==
{{trans|Kotlin}}
{{libheader|golang-pkg-pcre}}
<br>
The regexp package in the Go standard library is not fully compatible with PCRE and is unable to compile the regular expression used here. A third party library has therefore been used instead which is a PCRE shim for Go.
<lang go>package main
import (
"fmt"
"github.com/glenn-brown/golang-pkg-pcre/src/pkg/pcre"
)
var pattern =
"(*UTF)(*UCP)" + // Make \w unicode aware
"[a-z][-a-z0-9+.]*:" + // Scheme...
"(?=[/\\w])" + // ... but not just the scheme
"(?://[-\\w.@:]+)?" + // Host
"[-\\w.~/%!$&'()*+,;=]*" + // Path
"(?:\\?[-\\w.~%!$&'()*+,;=/?]*)?" + // Query
"(?:\\#[-\\w.~%!$&'()*+,;=/?]*)?" // Fragment
func main() {
text := `
this URI contains an illegal character, parentheses and a misplaced full stop:
http://en.wikipedia.org/wiki/Erich_Kästner_(camera_designer). (which is handled by http://mediawiki.org/).
and another one just to confuse the parser: http://en.wikipedia.org/wiki/-)
")" is handled the wrong way by the mediawiki parser.
ftp://domain.name/path(balanced_brackets)/foo.html
ftp://domain.name/path(balanced_brackets)/ending.in.dot.
ftp://domain.name/path(unbalanced_brackets/ending.in.dot.
leading junk ftp://domain.name/path/embedded?punct/uation.
leading junk ftp://domain.name/dangling_close_paren)
if you have other interesting URIs for testing, please add them here:
http://www.example.org/foo.html#includes_fragment
http://www.example.org/foo.html#enthält_Unicode-Fragment
`
descs := []string{"URIs:-", "IRIs:-"}
patterns := []string{pattern[12:], pattern}
for i := 0; i <= 1; i++ {
fmt.Println(descs[i])
re := pcre.MustCompile(patterns[i], 0)
t := text
for {
se := re.FindIndex([]byte(t), 0)
if se == nil {
break
}
fmt.Println(t[se[0]:se[1]])
t = t[se[1]:]
}
fmt.Println()
}
}</lang>
{{out}}
<pre>
URIs:-
http://en.wikipedia.org/wiki/Erich_K
http://mediawiki.org/).
http://en.wikipedia.org/wiki/-)
ftp://domain.name/path(balanced_brackets)/foo.html
ftp://domain.name/path(balanced_brackets)/ending.in.dot.
ftp://domain.name/path(unbalanced_brackets/ending.in.dot.
ftp://domain.name/path/embedded?punct/uation.
ftp://domain.name/dangling_close_paren)
http://www.example.org/foo.html#includes_fragment
http://www.example.org/foo.html#enth
IRIs:-
http://en.wikipedia.org/wiki/Erich_Kästner_(camera_designer).
http://mediawiki.org/).
http://en.wikipedia.org/wiki/-)
ftp://domain.name/path(balanced_brackets)/foo.html
ftp://domain.name/path(balanced_brackets)/ending.in.dot.
ftp://domain.name/path(unbalanced_brackets/ending.in.dot.
ftp://domain.name/path/embedded?punct/uation.
ftp://domain.name/dangling_close_paren)
http://www.example.org/foo.html#includes_fragment
http://www.example.org/foo.html#enthält_Unicode-Fragment
</pre>
=={{header|Icon}} and {{header|Unicon}}==
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