X-Git-Url: https://git.proxmox.com/?p=pve-client.git;a=blobdiff_plain;f=PVE%2FAPIClient%2FCommands%2Flxc.pm;h=650b6b5273e9cdf8cfa9f052afa5659a2aebf090;hp=81dfd3f01c9437ba2742cf0a4b48bdd7891ccd87;hb=8a58c00176a3a90c19046d075a23e74c6fc640b6;hpb=e9d848651dd50d169a532d4428f47b0754e5ac9d

diff --git a/PVE/APIClient/Commands/lxc.pm b/PVE/APIClient/Commands/lxc.pm
index 81dfd3f..650b6b5 100644
--- a/PVE/APIClient/Commands/lxc.pm
+++ b/PVE/APIClient/Commands/lxc.pm
@@ -2,6 +2,7 @@ package PVE::APIClient::Commands::lxc;
 
 use strict;
 use warnings;
+use Errno qw(EINTR EAGAIN);
 use JSON;
 use URI::Escape;
 use IO::Select;
@@ -19,7 +20,7 @@ use base qw(PVE::CLIHandler);
 use PVE::APIClient::Config;
 
 my $CRLF = "\x0D\x0A";
-my $max_payload_size = 65536;
+my $max_payload_size = 128*1024;
 
 my $build_web_socket_request = sub {
     my ($host, $path, $ticket, $termproxy) = @_;
@@ -128,6 +129,26 @@ my $parse_web_socket_frame = sub  {
     return ($payload, $req_close);
 };
 
+my $full_write = sub {
+    my ($fh, $data) = @_;
+
+    my $len = length($data);
+    my $todo = $len;
+    my $offset = 0;
+    while(1) {
+	my $nr = syswrite($fh, $data, $todo, $offset);
+	if (!defined($nr)) {
+	    next if $! == EINTR || $! == EAGAIN;
+	    die "console write error - $!\n"
+	}
+	$offset += $nr;
+	$todo -= $nr;
+	last if $todo <= 0;
+    }
+
+    return $len;
+};
+
 __PACKAGE__->register_method ({
     name => 'enter',
     path => 'enter',
@@ -175,7 +196,7 @@ __PACKAGE__->register_method ({
 	my ($request, $wskey) = $build_web_socket_request->(
 	    $conn->{host}, "/$api_path/vncwebsocket", $conn->{ticket}, $termproxy);
 
-	$web_socket->syswrite($request);
+	$full_write->($web_socket, $request);
 
 	my $wsbuf = '';
 
@@ -212,18 +233,22 @@ __PACKAGE__->register_method ({
 
 	# send auth again...
 	my $frame = $create_websockt_frame->($termproxy->{user} . ":" . $termproxy->{ticket} . "\n");
-	$web_socket->syswrite($frame);
+	$full_write->($web_socket, $frame);
 
 	# Send resize command
 	my ($columns, $rows) = PVE::PTY::tcgetsize(*STDIN);
 	$frame = $create_websockt_frame->("1:$columns:$rows:");
-	$web_socket->syswrite($frame);
+	$full_write->($web_socket, $frame);
 
 	# Set STDIN to "raw -echo" mode
 	my $old_termios = PVE::PTY::tcgetattr(*STDIN);
 	my $raw_termios = {%$old_termios};
 
-	my $select = IO::Select->new;
+	my $read_select = IO::Select->new;
+	my $write_select = IO::Select->new;
+
+	my $output_buffer = ''; # write buffer for STDOUT
+	my $websock_buffer = ''; # write buffer for $web_socket
 
 	eval {
 	    $SIG{TERM} = $SIG{INT} = $SIG{KILL} = sub { die "received interrupt\n"; };
@@ -233,17 +258,60 @@ __PACKAGE__->register_method ({
 
 	    # And set it to non-blocking so we can every char with IO::Select.
 	    STDIN->blocking(0);
-
 	    $web_socket->blocking(1);
-	    $select->add($web_socket);
-	    my $input_fh = fileno(STDIN);
-	    $select->add($input_fh);
+	    $read_select->add($web_socket);
+	    my $input_fh = \*STDIN;
+	    $read_select->add($input_fh);
+
+	    my $output_fh = \*STDOUT;
 
 	    my $ctrl_a_pressed_before = 0;
 
+	    my $winch_received = 0;
+	    $SIG{WINCH} = sub { $winch_received = 1; };
+
+	    my $check_terminal_size = sub {
+		my ($ncols, $nrows) = PVE::PTY::tcgetsize(*STDIN);
+		if ($ncols != $columns or $nrows != $rows) {
+		    $columns = $ncols;
+		    $rows = $nrows;
+		    $websock_buffer .= $create_websockt_frame->("1:$columns:$rows:");
+		    $write_select->add($web_socket);
+		}
+		$winch_received = 0;
+	    };
+
+	    my $max_buffer_len = 256*1024;
+
+	    my $drain_buffer = sub {
+		my ($fh, $buffer_ref) = @_;
+
+		my $len = length($$buffer_ref);
+		my $nr = syswrite($fh, $$buffer_ref);
+		if (!defined($nr)) {
+		    next if $! == EINTR || $! == EAGAIN;
+		    die "drain buffer - write error - $!\n";
+		}
+		return $nr if !$nr;
+		substr($$buffer_ref, 0, $nr, '');
+		$len = length($$buffer_ref);
+		$write_select->remove($fh) if !$len;
+	    };
+
 	    while (1) {
-		while(my @ready = $select->can_read(3)) {
-		    foreach my $fh (@ready) {
+		while(my ($readable, $writable) = IO::Select->select($read_select, $write_select, undef, 3)) {
+		    $check_terminal_size->() if $winch_received;
+
+		    foreach my $fh (@$writable) {
+			if ($fh == $output_fh) {
+			    $drain_buffer->($output_fh, \$output_buffer);
+			    $read_select->add($web_socket) if length($output_buffer) <= $max_buffer_len;
+			} elsif ($fh == $web_socket) {
+			    $drain_buffer->($web_socket, \$websock_buffer);
+			}
+		    }
+
+		    foreach my $fh (@$readable) {
 
 			if ($fh == $web_socket) {
 			    # Read from WebSocket
@@ -255,8 +323,12 @@ __PACKAGE__->register_method ({
 				return; # EOF
 			    } else {
 				my ($payload, $req_close) = $parse_web_socket_frame->(\$wsbuf);
-				if ($payload) {
-				    syswrite(\*STDOUT, $payload);
+				if (defined($payload) && length($payload)) {
+				    $output_buffer .= $payload;
+				    $write_select->add($output_fh);
+				    if (length($output_buffer) > $max_buffer_len) {
+					$read_select->remove($web_socket);
+				    }
 				}
 				return if $req_close;
 			    }
@@ -264,7 +336,7 @@ __PACKAGE__->register_method ({
 			} elsif ($fh == $input_fh) {
 			    # Read from STDIN
 
-			    my $nr = read(\*STDIN, my $buff, 4096);
+			    my $nr = sysread($input_fh, my $buff, 4096);
 			    return if !$nr; # EOF or error
 
 			    my $char = ord($buff);
@@ -274,13 +346,16 @@ __PACKAGE__->register_method ({
 
 			    $ctrl_a_pressed_before = ($char == hex("0x01") && $ctrl_a_pressed_before == 0) ? 1 : 0;
 
-			    my $frame = $create_websockt_frame->("0:" . $nr . ":" . $buff);
-			    syswrite($web_socket, $frame);
+			    $websock_buffer .= $create_websockt_frame->("0:" . $nr . ":" . $buff);
+			    $write_select->add($web_socket);
 			}
 		    }
 		}
+		$check_terminal_size->() if $winch_received;
+
 		# got timeout
-		syswrite($web_socket, $create_websockt_frame->("2")); # ping server to keep connection alive
+		$websock_buffer .= $create_websockt_frame->("2"); # ping server to keep connection alive
+		$write_select->add($web_socket);
 	    }
 	};
 	my $err = $@;
@@ -292,13 +367,17 @@ __PACKAGE__->register_method ({
 
 	    if ($web_socket->connected) {
 		# close connection
-		my $msg = "\x88" . pack('N', 0) . pack('n', 0); # Opcode, mask, statuscode
-		$web_socket->syswrite($msg);
+		$websock_buffer .= "\x88" . pack('N', 0) . pack('n', 0); # Opcode, mask, statuscode
+		$full_write->($web_socket, $websock_buffer);
+		$websock_buffer = '';
 		close($web_socket);
 	    }
 
 	    # Reset the terminal parameters.
-	    syswrite(\*STDOUT, "\e[24H\r\n");
+	    $output_buffer .= "\e[24H\r\n";
+	    $full_write->(\*STDOUT, $output_buffer);
+	    $output_buffer = '';
+
 	    PVE::PTY::tcsetattr(*STDIN, $old_termios);
 	};
 	warn $@ if $@; # show cleanup errors