# Copyright (C) 2016-2020 all contributors # License: AGPL-3.0+ # # Atom body stream for HTTP responses # See PublicInbox::GzipFilter for details. package PublicInbox::WwwAtomStream; use strict; use parent 'PublicInbox::GzipFilter'; use POSIX qw(strftime); use Digest::SHA qw(sha1_hex); use PublicInbox::Address; use PublicInbox::Hval qw(ascii_html mid_href); use PublicInbox::MsgTime qw(msg_timestamp); sub new { my ($class, $ctx, $cb) = @_; $ctx->{feed_base_url} = $ctx->{-inbox}->base_url($ctx->{env}); $ctx->{cb} = $cb || \&PublicInbox::GzipFilter::close; $ctx->{emit_header} = 1; bless $ctx, $class; } sub async_next ($) { my ($http) = @_; # PublicInbox::HTTP my $ctx = $http->{forward} or return; eval { if (my $smsg = $ctx->{smsg} = $ctx->{cb}->($ctx)) { $ctx->smsg_blob($smsg); } else { $ctx->{http_out}->write($ctx->translate('')); $ctx->close; } }; warn "E: $@" if $@; } sub async_eml { # for async_blob_cb my ($ctx, $eml) = @_; my $smsg = delete $ctx->{smsg}; $ctx->{http_out}->write($ctx->translate(feed_entry($ctx, $smsg, $eml))) } sub response { my ($class, $ctx, $code, $cb) = @_; my $res_hdr = [ 'Content-Type' => 'application/atom+xml' ]; $class->new($ctx, $cb); $ctx->psgi_response($code, $res_hdr); } # called once for each message by PSGI server sub getline { my ($self) = @_; my $cb = $self->{cb} or return; while (my $smsg = $cb->($self)) { my $eml = $self->{-inbox}->smsg_eml($smsg) or next; return $self->translate(feed_entry($self, $smsg, $eml)); } delete $self->{cb}; $self->zflush(''); } # private sub title_tag { my ($title) = @_; $title =~ tr/\t\n / /s; # squeeze spaces # try to avoid the type attribute in title: $title = ascii_html($title); my $type = index($title, '&') >= 0 ? "\ntype=\"html\"" : ''; "$title"; } sub to_uuid ($) { my ($any) = @_; utf8::encode($any); # really screwed up In-Reply-To fields exist $any = sha1_hex($any); my $h = '[a-f0-9]'; my (@uuid5) = ($any =~ m!\A($h{8})($h{4})($h{4})($h{4})($h{12})!o); 'urn:uuid:' . join('-', @uuid5); } sub atom_header { my ($ctx, $title) = @_; my $ibx = $ctx->{-inbox}; my $base_url = $ctx->{feed_base_url}; my $search_q = $ctx->{search_query}; my $self_url = $base_url; my $mid = $ctx->{mid}; my $page_id; if (defined $mid) { # per-thread $self_url .= mid_href($mid).'/t.atom'; $page_id = to_uuid("t\n".$mid) } elsif (defined $search_q) { my $query = $search_q->{'q'}; $title = title_tag("$query - search results"); $base_url .= '?' . $search_q->qs_html(x => undef); $self_url .= '?' . $search_q->qs_html; $page_id = to_uuid("q\n".$query); } else { $title = title_tag($ibx->description); $self_url .= 'new.atom'; $page_id = "mailto:$ibx->{-primary_address}"; } qq(\n) . qq() . qq{$title} . qq() . qq() . qq($page_id) . feed_updated($ibx->modified); } # returns undef or string sub feed_entry { my ($ctx, $smsg, $eml) = @_; my $hdr = $eml->header_obj; my $mid = $smsg->{mid}; my $irt = PublicInbox::View::in_reply_to($hdr); my $uuid = to_uuid($mid); my $base = $ctx->{feed_base_url}; if (defined $irt) { my $irt_uuid = to_uuid($irt); $irt = mid_href($irt); $irt = qq(); } else { $irt = ''; } my $href = $base . mid_href($mid) . '/'; my $updated = feed_updated(msg_timestamp($hdr)); my $title = $hdr->header('Subject'); $title = '(no subject)' unless defined $title && $title ne ''; $title = title_tag($title); my $from = $hdr->header('From') // $hdr->header('Sender') // $ctx->{-inbox}->{-primary_address}; my ($email) = PublicInbox::Address::emails($from); my $name = ascii_html(join(', ', PublicInbox::Address::names($from))); $email = ascii_html($email // $ctx->{-inbox}->{-primary_address}); my $s = delete($ctx->{emit_header}) ? atom_header($ctx, $title) : ''; $s .= "$name$email" . "$title$updated" . qq(). "$uuid$irt" . qq{} . qq{} . qq(); $ctx->{obuf} = \$s; $ctx->{mhref} = $href; PublicInbox::View::multipart_text_as_html($eml, $ctx); delete $ctx->{obuf}; $s .= ''; } sub feed_updated { '' . strftime('%Y-%m-%dT%H:%M:%SZ', gmtime(@_)) . ''; } 1;