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Connection.pm
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Connection.pm
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package RTSP::Server::Connection;
use Moose::Role;
use namespace::autoclean;
use RTSP::Server::Session;
use RTSP::Server::Mount;
use Carp qw/croak/;
use URI;
has 'id' => (
is => 'ro',
isa => 'Int',
required => 1,
);
has 'client_address' => (
is => 'ro',
isa => 'Str',
required => 1,
);
has 'client_port' => (
is => 'ro',
isa => 'Int',
required => 1,
);
has 'local_address' => (
is => 'ro',
isa => 'Str',
required => 1,
);
has 'addr_family' => (
is => 'ro',
isa => 'Str',
required => 1,
);
has 'handle' => (
is => 'rw',
accessor => 'h',
);
has 'current_method' => (
is => 'rw',
isa => 'Str',
clearer => 'clear_current_method',
);
has 'req_uri' => (
is => 'rw',
isa => 'Str',
clearer => 'clear_req_uri',
);
has 'expecting_header' => (
is => 'rw',
isa => 'Bool',
);
has 'body' => (
is => 'rw',
isa => 'Str',
clearer => 'clear_body',
);
# map of header => \@values
has 'req_headers' => (
is => 'rw',
isa => 'HashRef',
clearer => 'clear_req_headers',
lazy => 1,
default => sub { {} },
);
# map of header => \@values
has 'resp_headers' => (
is => 'rw',
isa => 'HashRef',
clearer => 'clear_resp_headers',
lazy => 1,
default => sub { {} },
);
has 'session' => (
is => 'rw',
isa => 'RTSP::Server::Session',
handles => [qw/ session_id /],
lazy => 1,
builder => 'build_session',
clearer => 'clear_session',
);
has 'server' => (
is => 'ro',
isa => 'RTSP::Server',
required => 1,
predicate => 'server_exists',
handles => [qw/ next_rtp_start_port mounts trace debug info warn error /],
);
# should return a list of supported methods
sub public_options {
return qw/OPTIONS DESCRIBE TEARDOWN/;
}
sub private_options {
return qw//;
}
sub teardown {
my ($self) = @_;
$self->clear_session;
}
sub describe {
my ($self) = @_;
my $mount = $self->get_mount
or return $self->not_found;
$self->add_resp_header('Content-Type', 'application/sdp');
$self->push_ok($mount->sdp);
}
sub options {
my ($self) = @_;
my @pub_methods = $self->public_options;
my @priv_methods = $self->private_options;
$self->add_resp_header('Public', join(', ', @pub_methods));
$self->add_resp_header('Private', join(', ', @priv_methods))
if @priv_methods;
$self->push_ok;
}
sub bad_request {
my ($self) = @_;
$self->push_response(400, "Bad Request");
}
sub not_found {
my ($self) = @_;
$self->info("Returning 404 for " . $self->req_uri);
$self->push_response(404, "Not Found");
}
sub internal_server_error {
my ($self) = @_;
$self->push_response(500, "Internal Server Error");
}
sub push_ok {
my ($self, $body) = @_;
$self->push_response(200, 'OK', $body);
}
sub build_session {
my ($self) = @_;
my $sess = RTSP::Server::Session->new(
);
return $sess;
}
sub request_finished {
my ($self) = @_;
my $method = $self->current_method;
unless ($method) {
$self->error("Finished parsing request but did not find method");
return;
}
$self->handle_request;
}
sub handle_request {
my ($self) = @_;
unless ($self->current_method) {
croak "handle_request called without current_method set";
}
my $method = lc $self->current_method;
# TODO: check auth
my @allowed_methods = ($self->public_options, $self->private_options);
if (grep { lc $_ eq $method } @allowed_methods) {
my $ok = eval {
$self->$method;
1;
};
if (! $ok || $@) {
$self->error("Error handling " . uc($method) . ": " .
($@ || 'unknown error'));
}
} else {
$self->push_response(405, 'Method Not Allowed');
}
$self->reset;
}
sub add_req_header {
my ($self, $hdr, $val) = @_;
$self->req_headers->{$hdr} ||= [];
my $vals = $self->req_headers->{$hdr};
push @$vals, $val;
return $val;
}
sub add_resp_header {
my ($self, $hdr, $val) = @_;
$self->resp_headers->{$hdr} ||= [];
my $vals = $self->resp_headers->{$hdr};
push @$vals, $val;
return $val;
}
# get a single header value. warns if multiple values are found
sub get_req_header {
my ($self, $hdr) = @_;
my $vals = $self->req_headers->{$hdr} or return;
if (@$vals > 1) {
$self->warn("Found multiple values for request header '$hdr' but expected only one");
}
return $vals->[0];
}
# same as above
sub get_resp_header {
my ($self, $hdr) = @_;
my $vals = $self->resp_headers->{$hdr} or return;
if (@$vals > 1) {
$self->warn("Found multiple values for response header '$hdr' but expected only one");
}
return $vals->[0];
}
sub push_response {
my ($self, $code, $msg, $body) = @_;
return unless $self->h;
$self->push_resp_line("RTSP/1.0 $code $msg");
# push headers
foreach my $hdr (keys %{ $self->resp_headers }) {
foreach my $val (@{ $self->resp_headers->{$hdr} }) {
$self->push_resp_line("$hdr: $val");
}
}
# add content-length header if there's a body to return
$self->push_resp_line("Content-Length: " . length($body))
if $body;
# add cseq, if available
my $cseq = $self->req_cseq;
$self->push_resp_line("CSeq: $cseq") if $cseq;
# add session id, if available
if ($self->session) {
my $session_id = $self->session->session_id;
$self->push_resp_line("Session: $session_id");
}
# end of headers
$self->h->push_write("\r\n");
# body?
$self->h->push_write($body) if $body;
$self->info("Returning error $code: $msg")
if $code !~ /2\d\d/;
}
sub push_resp_line {
my ($self, $line) = @_;
$self->trace(" << $line");
$self->h->push_write("$line\r\n");
}
sub req_cseq {
my ($self) = @_;
return $self->get_req_header('cseq') ||
$self->get_req_header('Cseq') ||
$self->get_req_header('CSeq');
}
sub req_content_length {
my ($self) = @_;
return $self->get_req_header('content-length') ||
$self->get_req_header('Content-length') ||
$self->get_req_header('Content-Length');
}
# parse a uri, find the path
sub get_mount_path {
my ($self, $uri) = @_;
$uri ||= $self->req_uri or return;
my $u = new URI($uri) or return;
my $path = $u->path or return;
return $path;
}
# get a stream
sub get_mount {
my ($self, $path) = @_;
$path ||= $self->get_mount_path or return;
my ($stream_id) = $path =~ m!/streamid=(\d+)!sm;
$path =~ s!/streamid=(\d+)!!sm;
my $mnt = $self->mounts->{$path};
return wantarray ? ($mnt, $stream_id) : $mnt;
}
# returns new mount point
sub mount {
my ($self, %opts) = @_;
# check args
my ($path, $sdp);
{
$path = delete $opts{path}
or croak "Connection->mount() called with no path";
$sdp = delete $opts{sdp}
or croak "Connection->mount() called with no SDP info";
croak 'Unknown options: ' . join(', ', keys %opts)
if keys %opts;
}
# unmount existing mountpoint if it exists
$path ||= $self->get_mount_path or return;
$self->unmount($path) if $self->get_mount($path);
# create mount point
my $mount = new RTSP::Server::Mount(
path => $path,
sdp => $sdp,
);
$self->mounts->{$path} = $mount;
$self->info("Mounted $path");
return $mount;
}
# delete a stream
sub unmount {
my ($self, $path) = @_;
$path ||= $self->get_mount_path or return;
delete $self->mounts->{$path};
$self->info("Unmounting $path");
}
sub reset {
my ($self) = @_;
$self->clear_req_headers;
$self->clear_resp_headers;
$self->clear_req_uri;
$self->clear_current_method;
$self->clear_body;
$self->expecting_header(0);
}
sub DEMOLISH {
my ($self) = @_;
$self->server->housekeeping if $self->server_exists;
}
1;