http::daemon.3

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

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.\" ========================================================================
.\"
.IX Title "HTTP::Daemon 3"
.TH HTTP::Daemon 3 "2007-07-19" "perl v5.10.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
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.SH "NAME"
HTTP::Daemon \- a simple http server class
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  use HTTP::Daemon;
\&  use HTTP::Status;
\&
\&  my $d = HTTP::Daemon\->new || die;
\&  print "Please contact me at: <URL:", $d\->url, ">\en";
\&  while (my $c = $d\->accept) {
\&      while (my $r = $c\->get_request) {
\&          if ($r\->method eq \*(AqGET\*(Aq and $r\->url\->path eq "/xyzzy") {
\&              # remember, this is *not* recommended practice :\-)
\&              $c\->send_file_response("/etc/passwd");
\&          }
\&          else {
\&              $c\->send_error(RC_FORBIDDEN)
\&          }
\&      }
\&      $c\->close;
\&      undef($c);
\&  }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Instances of the \f(CW\*(C`HTTP::Daemon\*(C'\fR class are \s-1HTTP/1\s0.1 servers that
listen on a socket for incoming requests. The \f(CW\*(C`HTTP::Daemon\*(C'\fR is a
subclass of \f(CW\*(C`IO::Socket::INET\*(C'\fR, so you can perform socket operations
directly on it too.
.PP
The \fIaccept()\fR method will return when a connection from a client is
available.  The returned value will be an \f(CW\*(C`HTTP::Daemon::ClientConn\*(C'\fR
object which is another \f(CW\*(C`IO::Socket::INET\*(C'\fR subclass.  Calling the
\&\fIget_request()\fR method on this object will read data from the client and
return an \f(CW\*(C`HTTP::Request\*(C'\fR object.  The ClientConn object also provide
methods to send back various responses.
.PP
This \s-1HTTP\s0 daemon does not \fIfork\fR\|(2) for you.  Your application, i.e. the
user of the \f(CW\*(C`HTTP::Daemon\*(C'\fR is responsible for forking if that is
desirable.  Also note that the user is responsible for generating
responses that conform to the \s-1HTTP/1\s0.1 protocol.
.PP
The following methods of \f(CW\*(C`HTTP::Daemon\*(C'\fR are new (or enhanced) relative
to the \f(CW\*(C`IO::Socket::INET\*(C'\fR base class:
.ie n .IP "$d = HTTP::Daemon\->new" 4
.el .IP "\f(CW$d\fR = HTTP::Daemon\->new" 4
.IX Item "$d = HTTP::Daemon->new"
.PD 0
.ie n .IP "$d\fR = HTTP::Daemon\->new( \f(CW%opts )" 4
.el .IP "\f(CW$d\fR = HTTP::Daemon\->new( \f(CW%opts\fR )" 4
.IX Item "$d = HTTP::Daemon->new( %opts )"
.PD
The constructor method takes the same arguments as the
\&\f(CW\*(C`IO::Socket::INET\*(C'\fR constructor, but unlike its base class it can also
be called without any arguments.  The daemon will then set up a listen
queue of 5 connections and allocate some random port number.
.Sp
A server that wants to bind to some specific address on the standard
\&\s-1HTTP\s0 port will be constructed like this:
.Sp
.Vb 4
\&  $d = HTTP::Daemon\->new(
\&           LocalAddr => \*(Aqwww.thisplace.com\*(Aq,
\&           LocalPort => 80,
\&       );
.Ve
.Sp
See IO::Socket::INET for a description of other arguments that can
be used configure the daemon during construction.
.ie n .IP "$c\fR = \f(CW$d\->accept" 4
.el .IP "\f(CW$c\fR = \f(CW$d\fR\->accept" 4
.IX Item "$c = $d->accept"
.PD 0
.ie n .IP "$c\fR = \f(CW$d\fR\->accept( \f(CW$pkg )" 4
.el .IP "\f(CW$c\fR = \f(CW$d\fR\->accept( \f(CW$pkg\fR )" 4
.IX Item "$c = $d->accept( $pkg )"
.ie n .IP "($c, $peer_addr\fR) = \f(CW$d\->accept" 4
.el .IP "($c, \f(CW$peer_addr\fR) = \f(CW$d\fR\->accept" 4
.IX Item "($c, $peer_addr) = $d->accept"
.PD
This method works the same the one provided by the base class, but it
returns an \f(CW\*(C`HTTP::Daemon::ClientConn\*(C'\fR reference by default.  If a
package name is provided as argument, then the returned object will be