From 1ebd2f3f136a29e973a2919b100da6d5f6219d3d Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Fri, 18 Jan 2019 12:18:10 +0000
Subject: view: enable naming hints for raw blob downloads

Meaningful names in URLs are nice, and it can make
life easier for supporting syntax-highlighting
---
 lib/PublicInbox/ViewVCS.pm | 32 +++++++++++++++++++++++++++-----
 1 file changed, 27 insertions(+), 5 deletions(-)

(limited to 'lib/PublicInbox/ViewVCS.pm')

diff --git a/lib/PublicInbox/ViewVCS.pm b/lib/PublicInbox/ViewVCS.pm
index 49fb1c58..90c09078 100644
--- a/lib/PublicInbox/ViewVCS.pm
+++ b/lib/PublicInbox/ViewVCS.pm
@@ -2,6 +2,17 @@
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # show any VCS object, similar to "git show"
+# FIXME: we only show blobs for now
+#
+# This can use a "solver" to reconstruct blobs based on git
+# patches (with abbreviated OIDs in the header).  However, the
+# abbreviated OIDs must match exactly what's in the original
+# email (unless a normal code repo already has the blob).
+#
+# In other words, we can only reliably reconstruct blobs based
+# on links generated by ViewDiff (and only if the emailed
+# patches apply 100% cleanly to published blobs).
+
 package PublicInbox::ViewVCS;
 use strict;
 use warnings;
@@ -9,7 +20,7 @@ use Encode qw(find_encoding);
 use PublicInbox::SolverGit;
 use PublicInbox::WwwStream;
 use PublicInbox::Linkify;
-use PublicInbox::Hval qw(ascii_html);
+use PublicInbox::Hval qw(ascii_html to_filename);
 my %QP_MAP = ( A => 'oid_a', B => 'oid_b', a => 'path_a', b => 'path_b' );
 my $max_size = 1024 * 1024; # TODO: configurable
 my $enc_utf8 = find_encoding('UTF-8');
@@ -63,8 +74,18 @@ sub show ($$;$) {
 		return html_page($ctx, 500, \$log);
 	}
 
-	if (index($$blob, "\0") >= 0) {
-		$log = "<pre>$oid $type $size bytes (binary)</pre>" . $log;
+	my $binary = index($$blob, "\0") >= 0;
+	if ($fn) {
+		my $h = [ 'Content-Length', $size, 'Content-Type' ];
+		push(@$h, ($binary ? 'application/octet-stream' : 'text/plain'));
+		return [ 200, $h, [ $$blob ]];
+	}
+
+	my $path = to_filename($di->{path_b} || $hints->{path_b} || 'blob');
+	my $raw_link = "(<a\nhref=_$path>raw</a>)";
+	if ($binary) {
+		$log = "<pre>$oid $type $size bytes (binary)" .
+			" $raw_link</pre>" . $log;
 		return html_page($ctx, 200, \$log);
 	}
 
@@ -73,13 +94,14 @@ sub show ($$;$) {
 	my $pad = length($nl);
 
 	# using some of the same CSS class names and ids as cgit
-	$log = "<pre>$oid $type $size bytes</pre><hr /><table\nclass=blob>".
+	$log = "<pre>$oid $type $size bytes $raw_link</pre>" .
+		"<hr /><table\nclass=blob>".
 		"<tr><td\nclass=linenumbers><pre>" . join('', map {
 			sprintf("<a id=n$_ href=#n$_>% ${pad}u</a>\n", $_)
 		} (1..$nl)) . '</pre></td>' .
 		'<td><pre> </pre></td>'. # pad for non-CSS users
 		"<td\nclass=lines><pre><code>" .  ascii_html($$blob) .
-		'</pre></td></tr></table>' . $log;
+		'</code></pre></td></tr></table>' . $log;
 
 	html_page($ctx, 200, \$log);
 }
-- 
cgit v1.2.3-24-ge0c7