From c66032630f0e4fc3f4b59413a12f9ab35be958be Mon Sep 17 00:00:00 2001 From: Florian Pritz Date: Thu, 19 Jul 2018 16:29:32 +0200 Subject: Reconnect when connection is lost Signed-off-by: Florian Pritz --- lib/App/ImapNotify.pm | 44 ++++++++++++++++++++++++++++++++++++---- lib/App/ImapNotify/ImapClient.pm | 31 +++++++++++++++------------- lib/App/ImapNotify/Socket/SSL.pm | 20 ++++++++++-------- 3 files changed, 68 insertions(+), 27 deletions(-) (limited to 'lib/App') diff --git a/lib/App/ImapNotify.pm b/lib/App/ImapNotify.pm index e7aba6f..b7b1cf7 100644 --- a/lib/App/ImapNotify.pm +++ b/lib/App/ImapNotify.pm @@ -11,6 +11,7 @@ use App::ImapNotify::Notifier; use Carp; use Function::Parameters; use Log::Any qw($log); +use Syntax::Keyword::Try; =encoding utf-8 @@ -55,10 +56,47 @@ method new_no_defaults($class: $config, $deps = {}) { return $self; } +=head3 loop_reconnect + + $app->loop_reconnect(); + +Same as loop(), but automatcally calls loop() again if the connection is lost. + +=cut + +method loop_reconnect() { + my $holdoff_time = 10; + my $holdoff_repeat = 0; + my $holdoff_limit = 300; + + while (1) { + my $last_time = time; + try { + $self->loop(); + } catch { + die $@ unless $@ =~ m/^Lost connection while .*/; + } + $holdoff_repeat = 0 if (time - $last_time) > $holdoff_limit; + sleep($holdoff_time * $holdoff_repeat++); + } +} + +=head3 loop + + $app->loop(); + +Open a connection and wait for NOTIFY notifications. When a NOTIFY notification +arrives, show a notification to the user. + +This method throws an exception when the connection to the server is lost. If +you want to continue waiting for new notifications, you may call this method +again. Also look at loop_reconnect(). + +=cut + method loop() { - #my $imap = $self->{deps}->{imap_client}->connect($self->{config}->@{qw(host port log_id)}); - #$imap->login($self->{config}->@{qw(username password)}); my $imap = $self->{deps}->{imap_client}; + $imap->reconnect(); $imap->select($self->{config}->{mailboxes}->@[0]); $imap->send_command("notify set (selected (MessageExpunge MessageNew (uid body.peek[header.fields (from to subject)]))) (mailboxes (".join(' ', $self->{config}->{mailboxes}->@*).") (MessageNew MessageExpunge MailboxName))"); @@ -75,8 +113,6 @@ method loop() { my $mailbox = $+{mailbox}; my $uid = $+{uidnext} - 1; $log->debugf("Got status change: '%s'", $line =~ s/\r\n$//r); - #$imap2->select($mailbox); - #my $message = $imap2->send_command("uid fetch $uid (body.peek[header.fields (from to subject)])"); $imap->select($mailbox); my $message = $imap->send_command("uid fetch $uid (body.peek[header.fields (from to subject)])"); pop @{$message}; diff --git a/lib/App/ImapNotify/ImapClient.pm b/lib/App/ImapNotify/ImapClient.pm index 6e5e21b..ae91c78 100644 --- a/lib/App/ImapNotify/ImapClient.pm +++ b/lib/App/ImapNotify/ImapClient.pm @@ -53,27 +53,33 @@ method new_no_defaults($class: $config, $deps = {}) { $self->{keepalive_timeout} = $config->{keepalive_timeout}; $self->{line_buffer} = []; $self->{deps} = $deps; - $self->_connect(); - $self->_login($config->@{qw(username password)}); + $self->{config} = $config; return $self; } -method _connect() { - # wait for server greeting +method reconnect() { + $self->{command_counter} = 0; + $self->{deps}->{sock}->reconnect(); my $response = $self->readline_block(); + croak("Lost connection while waiting for server greeting") if not defined $response; + if ($response !~ m/^\* OK (.*)/) { - confess "Invalid server greeting. Got reply: $response"; + confess "Invalid server greeting. Got reply: '$response'"; } $self->{capabilities} = $1; + + $self->_login(); } -method _login($username, $password) { +method _login() { if ($self->{capabilities} !~ m/\bAUTH=PLAIN\b/) { croak "Server doesn't support AUTH=PLAIN"; } - my $response = $self->send_command("login $username $password"); + my $response = $self->send_command("login $self->{config}->{username} $self->{config}->{password}"); + return if not defined $response; + confess "No capabilities found in response: '".$response->[0]."'" unless $response->[0] =~ m/^OK \[(.*)\].*$/; $self->{capabilities} = $1; @@ -92,15 +98,10 @@ method select($mailbox) { method send_command($command) { - state $counter = 0; - - my $id = "CMD-".$counter++; + my $id = "CMD-".$self->{command_counter}++; chomp($command); - #print "Sending $command\n"; - #sleep (5) if $command eq "noop"; - $self->writeline("$id $command\r\n"); my @lines; @@ -125,8 +126,10 @@ method send_command($command) { if ($line =~ /^(.*\r\n)$/) { push @lines, $1; } - } + + croak("Lost connection while waiting for reply to command '$command'"); + return; } method get_uids($mailbox) { diff --git a/lib/App/ImapNotify/Socket/SSL.pm b/lib/App/ImapNotify/Socket/SSL.pm index 18d7ffa..2654cdc 100644 --- a/lib/App/ImapNotify/Socket/SSL.pm +++ b/lib/App/ImapNotify/Socket/SSL.pm @@ -8,24 +8,26 @@ use Function::Parameters; use IO::Socket::SSL; use Log::Any qw($log); -method new($class: $host, $port, $deps = {}) { - $deps->{sock} //= IO::Socket::SSL->new("$host:$port"); - return $class->new_no_defaults($deps); -} - -method new_no_defaults($class: $deps = {}) { +method new($class: $host, $port) { my $self = {}; + $self->{config} = { + host => $host, + port => $port, + }; bless $self, $class; - $self->{deps} = $deps; return $self; } +method reconnect() { + $self->{sock} = IO::Socket::SSL->new("$self->{config}->{host}:$self->{config}->{port}"); +} + method readline() { - return CORE::readline $self->{deps}->{sock}; + return CORE::readline $self->{sock}; } method writeline($line) { - print {$self->{deps}->{sock}} $line; + print {$self->{sock}} $line; } -- cgit v1.2.3-24-g4f1b