[PATCH] linkify: be stricter about matching RFC 3986

[Eric Wong <e@80x24.org>]

We're not to-the-letter about percent-encoding, but
we should allow all the characters.  This is mainly
so we can effectively use the link to some Wikipedia
pages with parentheses in them:

	https://en.wikipedia.org/wiki/Atom_(standard)
	https://en.wikipedia.org/wiki/Git_(software)
---
 lib/PublicInbox/Linkify.pm |  5 ++++-
 t/linkify.t                | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/Linkify.pm b/lib/PublicInbox/Linkify.pm
index d4df689..ea7fd71 100644
--- a/lib/PublicInbox/Linkify.pm
+++ b/lib/PublicInbox/Linkify.pm
@@ -17,7 +17,10 @@ use Digest::SHA qw/sha1_hex/;
 my $SALT = rand;
 my $LINK_RE = qr{\b((?:ftps?|https?|nntps?|gopher)://
 		 [\@:\w\.-]+/
-		 ?[!,:~\$\@\w\+\&\?\.\%\;/#=-]*)}x;
+		 (?:[a-z0-9\-\._~!\$\&\';\(\)\*\+,;=:@/%]*)
+		 (?:\?[a-z0-9\-\._~!\$\&\';\(\)\*\+,;=:@/%]+)?
+		 (?:\#[a-z0-9\-\._~!\$\&\';\(\)\*\+,;=:@/%\?]+)?
+		 )}xi;
 
 sub new { bless {}, shift }
 
diff --git a/t/linkify.t b/t/linkify.t
index 586691a..ec0d515 100644
--- a/t/linkify.t
+++ b/t/linkify.t
@@ -23,4 +23,38 @@ use PublicInbox::Linkify;
 	is($s, qq(<a\nhref="$u">$u</a>;), 'trailing semicolon not in URL');
 }
 
+{
+	my $l = PublicInbox::Linkify->new;
+	my $u = 'http://example.com/url-with-(parens)';
+        my $s = "hello $u world";
+	$s = $l->linkify_1($s);
+	$s = $l->linkify_2($s);
+	is($s, qq(hello <a\nhref="$u">$u</a> world), 'URL preserved');
+
+        $u .= "?query=a";
+        $s = "hello $u world";
+	$s = $l->linkify_1($s);
+	$s = $l->linkify_2($s);
+	is($s, qq(hello <a\nhref="$u">$u</a> world), 'query preserved');
+
+        $u .= "#fragment";
+        $s = "hello $u world";
+	$s = $l->linkify_1($s);
+	$s = $l->linkify_2($s);
+	is($s, qq(hello <a\nhref="$u">$u</a> world),
+          'query + fragment preserved');
+
+        $u = "http://example.com/";
+        $s = "hello $u world";
+	$s = $l->linkify_1($s);
+	$s = $l->linkify_2($s);
+	is($s, qq(hello <a\nhref="$u">$u</a> world), "root URL preserved");
+
+        $u = "http://example.com/#fragment";
+        $s = "hello $u world";
+	$s = $l->linkify_1($s);
+	$s = $l->linkify_2($s);
+	is($s, qq(hello <a\nhref="$u">$u</a> world), "root + fragment");
+}
+
 done_testing();
-- 
EW