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-rw-r--r--lib/PublicInbox/WWW.pm13
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/PublicInbox/WWW.pm b/lib/PublicInbox/WWW.pm
index be34e1cd..8f069642 100644
--- a/lib/PublicInbox/WWW.pm
+++ b/lib/PublicInbox/WWW.pm
@@ -58,6 +58,10 @@ sub run {
                 my $sp = $2;
                 invalid_list(\%ctx, $1) || get_subject_path(\%ctx, $cgi, $sp);
 
+        } elsif ($path_info =~ m!$LISTNAME_RE/f/\S+\.txt\z!o) {
+                invalid_list_mid(\%ctx, $1, $2) ||
+                        redirect_mid_txt(\%ctx, $cgi);
+
         # convenience redirects, order matters
         } elsif ($path_info =~ m!$LISTNAME_RE/(m|f|t|s)/(\S+)\z!o) {
                 my $pfx = $2;
@@ -231,6 +235,15 @@ sub redirect_mid {
         do_redirect($url . ".html$anchor");
 }
 
+# only hit when somebody tries to guess URLs manually:
+sub redirect_mid_txt {
+        my ($ctx, $cgi, $pfx) = @_;
+        my $listname = $ctx->{listname};
+        my $url = self_url($cgi);
+        $url =~ s!/$listname/f/(\S+\.txt)\z!/$listname/m/$1!;
+        do_redirect($url);
+}
+
 sub do_redirect {
         my ($url) = @_;
         [ 301,