NAME¶
Net::SSLeay::Handle - Perl module that lets SSL (HTTPS) sockets be handled as
standard file handles.
SYNOPSIS¶
use Net::SSLeay::Handle qw/shutdown/;
my ($host, $port) = ("localhost", 443);
tie(*SSL, "Net::SSLeay::Handle", $host, $port);
print SSL "GET / HTTP/1.0\r\n";
shutdown(\*SSL, 1);
print while (<SSL>);
close SSL;
DESCRIPTION¶
Net::SSLeay::Handle allows you to request and receive HTTPS web pages using
"old-fashion" file handles as in:
print SSL "GET / HTTP/1.0\r\n";
and
print while (<SSL>);
If you export the shutdown routine, then the only extra code that you need to
add to your program is the tie function as in:
my $socket;
if ($scheme eq "https") {
tie(*S2, "Net::SSLeay::Handle", $host, $port);
$socket = \*S2;
else {
$socket = Net::SSLeay::Handle->make_socket($host, $port);
}
print $socket $request_headers;
...
FUNCTIONS¶
- shutdown
-
shutdown(\*SOCKET, $mode)
Calls to the main shutdown() don't work with tied sockets created
with this module. This shutdown should be able to distinquish between tied
and untied sockets and do the right thing.
- debug
-
my $debug = Net::SSLeay::Handle->debug()
Net::SSLeay::Handle->debug(1)
Get/set debuging mode. Always returns the debug value before the function
call. if an additional argument is given the debug option will be set to
this value.
- make_socket
-
my $sock = Net::SSLeay::Handle->make_socket($host, $port);
Creates a socket that is connected to $post using $port. It uses
$Net::SSLeay::proxyhost and proxyport if set and authentificates itself
against this proxy depending on $Net::SSLeay::proxyauth. It also turns
autoflush on for the created socket.
USING EXISTING SOCKETS¶
One of the motivations for writing this module was to avoid duplicating socket
creation code (which is mostly error handling). The calls to
tie()
above where it is passed a $host and $port is provided for convenience
testing. If you already have a socket connected to the right host and port,
S1, then you can do something like:
my $socket \*S1;
if ($scheme eq "https") {
tie(*S2, "Net::SSLeay::Handle", $socket);
$socket = \*S2;
}
my $last_sel = select($socket); $| = 1; select($last_sel);
print $socket $request_headers;
...
Note: As far as I know you must be careful with the globs in the
tie()
function. The first parameter must be a glob (*SOMETHING) and the last
parameter must be a reference to a glob (\*SOMETHING_ELSE) or a scaler that
was assigned to a reference to a glob (as in the example above)
Also, the two globs must be different. When I tried to use the same glob, I got
a core dump.
EXPORT¶
None by default.
You can export the
shutdown() function.
It is suggested that you do export
shutdown() or use the fully qualified
Net::SSLeay::Handle::shutdown() function to shutdown SSL sockets. It
should be smart enough to distinguish between SSL and non-SSL sockets and do
the right thing.
EXAMPLES¶
use Net::SSLeay::Handle qw/shutdown/;
my ($host, $port) = ("localhost", 443);
tie(*SSL, "Net::SSLeay::Handle", $host, $port);
print SSL "GET / HTTP/1.0\r\n";
shutdown(\*SSL, 1);
print while (<SSL>);
close SSL;
TODO¶
Better error handling. Callback routine?
CAVEATS¶
Tying to a file handle is a little tricky (for me at least).
The first parameter to
tie() must be a glob (*SOMETHING) and the last
parameter must be a reference to a glob (\*SOMETHING_ELSE) or a scaler that
was assigned to a reference to a glob ($s = \*SOMETHING_ELSE). Also, the two
globs must be different. When I tried to use the same glob, I got a core dump.
I was able to associate attributes to globs created by this module (like *SSL
above) by making a hash of hashes keyed by the file head1.
Support for old perls may not be 100%. If in trouble try 5.6.0 or newer.
CHANGES¶
Please see Net-SSLeay-Handle-0.50/Changes file.
KNOWN BUGS¶
If you let this module construct sockets for you with Perl versions below v.5.6
then there is a slight memory leak. Other upgrade your Perl, or create the
sockets yourself. The leak was created to let these older versions of Perl
access more than one Handle at a time.
AUTHOR¶
Jim Bowlin jbowlin@linklint.org
SEE ALSO¶
Net::SSLeay,
perl(1),
http://openssl.org/