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From: Eric Wong <e@yhbt.net>
To: meta@public-inbox.org
Subject: [PATCH 41/43] gzipfilter: drop HTTP connection on bugs or data corruption
Date: Sun,  5 Jul 2020 23:27:57 +0000	[thread overview]
Message-ID: <20200705232759.3161-42-e@yhbt.net> (raw)
In-Reply-To: <20200705232759.3161-1-e@yhbt.net>

While all the {async_next} callbacks needed eval guards anyways
because of DS->write, {async_eml} callbacks did not.

Ensure any bugs in our code or data corruption result in
termination of the HTTP connection, so as not to leave clients
hanging on a response which never comes or is mangled in some
way.
---
 lib/PublicInbox/GzipFilter.pm | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/lib/PublicInbox/GzipFilter.pm b/lib/PublicInbox/GzipFilter.pm
index d72ad3c88..57344604b 100644
--- a/lib/PublicInbox/GzipFilter.pm
+++ b/lib/PublicInbox/GzipFilter.pm
@@ -147,18 +147,34 @@ sub close {
 	}
 }
 
+sub bail  {
+	my $self = shift;
+	if (my $env = $self->{env}) {
+		eval { $env->{'psgi.errors'}->print(@_, "\n") };
+		warn("E: error printing to psgi.errors: $@", @_) if $@;
+		my $http = $env->{'psgix.io'} or return; # client abort
+		eval { $http->close }; # should hit our close
+		warn "E: error in http->close: $@" if $@;
+		eval { $self->close }; # just in case...
+		warn "E: error in self->close: $@" if $@;
+	} else {
+		warn @_, "\n";
+	}
+}
+
 # this is public-inbox-httpd-specific
 sub async_blob_cb { # git->cat_async callback
 	my ($bref, $oid, $type, $size, $self) = @_;
 	my $http = $self->{env}->{'psgix.io'} or return; # client abort
-	my $smsg = $self->{smsg} or die 'BUG: no smsg';
+	my $smsg = $self->{smsg} or bail($self, 'BUG: no smsg');
 	if (!defined($oid)) {
 		# it's possible to have TOCTOU if an admin runs
 		# public-inbox-(edit|purge), just move onto the next message
 		return $http->next_step($self->{async_next});
 	}
-	$smsg->{blob} eq $oid or die "BUG: $smsg->{blob} != $oid";
-	$self->{async_eml}->($self, PublicInbox::Eml->new($bref));
+	$smsg->{blob} eq $oid or bail($self, "BUG: $smsg->{blob} != $oid");
+	eval { $self->{async_eml}->($self, PublicInbox::Eml->new($bref)) };
+	bail($self, "E: async_eml: $@") if $@;
 	$http->next_step($self->{async_next});
 }
 

  parent reply	other threads:[~2020-07-05 23:28 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-05 23:27 [PATCH 00/43] www: async git cat-file w/ -httpd Eric Wong
2020-07-05 23:27 ` [PATCH 01/43] gzipfilter: minor cleanups Eric Wong
2020-07-05 23:27 ` [PATCH 02/43] wwwstream: oneshot: perform gzip without middleware Eric Wong
2020-07-05 23:27 ` [PATCH 03/43] www*stream: gzip ->getline responses Eric Wong
2020-07-05 23:27 ` [PATCH 04/43] wwwtext: gzip text/plain responses, as well Eric Wong
2020-07-05 23:27 ` [PATCH 05/43] wwwtext: switch to html_oneshot Eric Wong
2020-07-05 23:27 ` [PATCH 06/43] www: need: use WwwStream::html_oneshot Eric Wong
2020-07-05 23:27 ` [PATCH 07/43] wwwlisting: use GzipFilter for HTML Eric Wong
2020-07-05 23:27 ` [PATCH 08/43] gzipfilter: replace Compress::Raw::Deflate usages Eric Wong
2020-07-05 23:27 ` [PATCH 09/43] {gzip,noop}filter: ->zmore returns undef, always Eric Wong
2020-07-05 23:27 ` [PATCH 10/43] mbox: remove html_oneshot import Eric Wong
2020-07-05 23:27 ` [PATCH 11/43] wwwstatic: support gzipped directory listings Eric Wong
2020-07-05 23:27 ` [PATCH 12/43] qspawn: learn to gzip streaming responses Eric Wong
2020-07-05 23:27 ` [PATCH 13/43] stop auto-loading Plack::Middleware::Deflater Eric Wong
2020-07-05 23:27 ` [PATCH 14/43] mboxgz: do asynchronous git blob retrievals Eric Wong
2020-07-05 23:27 ` [PATCH 15/43] mboxgz: reduce hash depth Eric Wong
2020-07-05 23:27 ` [PATCH 16/43] mbox: async blob fetch for "single message" raw mboxrd Eric Wong
2020-07-05 23:27 ` [PATCH 17/43] wwwatomstream: simplify feed_update callers Eric Wong
2020-07-05 23:27 ` [PATCH 18/43] wwwatomstream: use PublicInbox::Inbox->modified for feed_updated Eric Wong
2020-07-05 23:27 ` [PATCH 19/43] wwwatomstream: reuse $ctx as $self Eric Wong
2020-07-05 23:27 ` [PATCH 20/43] xt/httpd-async-stream: allow more options Eric Wong
2020-07-05 23:27 ` [PATCH 21/43] wwwatomstream: support async blob fetch Eric Wong
2020-07-05 23:27 ` [PATCH 22/43] wwwstream: reduce object graph depth Eric Wong
2020-07-05 23:27 ` [PATCH 23/43] wwwstream: reduce blob fetch paths for ->getline Eric Wong
2020-07-05 23:27 ` [PATCH 24/43] www: start making gzipfilter the parent response class Eric Wong
2020-07-05 23:27 ` [PATCH 25/43] remove unused/redundant zlib-related imports Eric Wong
2020-07-05 23:27 ` [PATCH 26/43] wwwstream: use parent.pm and no warnings Eric Wong
2020-07-05 23:27 ` [PATCH 27/43] wwwstream: subclass off GzipFilter Eric Wong
2020-07-05 23:27 ` [PATCH 28/43] view: make /$INBOX/$MSGID/ permalink async Eric Wong
2020-07-05 23:27 ` [PATCH 29/43] view: /$INBOX/$MSGID/t/ reads blobs asynchronously Eric Wong
2020-07-05 23:27 ` [PATCH 30/43] view: update /$INBOX/$MSGID/T/ to be async Eric Wong
2020-07-05 23:27 ` [PATCH 31/43] feed: generate_i: eliminate pointless loop Eric Wong
2020-07-05 23:27 ` [PATCH 32/43] feed: /$INBOX/new.html fetches blobs asynchronously Eric Wong
2020-07-05 23:27 ` [PATCH 33/43] ssearchview: /$INBOX/?q=$QUERY&x=t uses async blobs Eric Wong
2020-07-05 23:27 ` [PATCH 34/43] view: eml_entry: reduce parameters Eric Wong
2020-07-05 23:27 ` [PATCH 35/43] view: /$INBOX/$MSGID/t/: avoid extra hash lookup in eml case Eric Wong
2020-07-05 23:27 ` [PATCH 36/43] wwwstream: eliminate ::response, use html_oneshot Eric Wong
2020-07-05 23:27 ` [PATCH 37/43] www: update internal docs Eric Wong
2020-07-05 23:27 ` [PATCH 38/43] view: simplify eml_entry callers further Eric Wong
2020-07-05 23:27 ` [PATCH 39/43] wwwtext: simplify gzf_maybe use Eric Wong
2020-07-05 23:27 ` [PATCH 40/43] wwwattach: support async blob retrievals Eric Wong
2020-07-05 23:27 ` Eric Wong [this message]
2020-07-05 23:27 ` [PATCH 42/43] daemon: warn on missing blobs Eric Wong
2020-07-05 23:27 ` [PATCH 43/43] gzipfilter: check http->{forward} for client disconnects Eric Wong

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