NAME

       AnyEvent::HTTPD::Request - A web application request handle for AnyEvent::HTTPD

DESCRIPTION

       This is the request object as generated by AnyEvent::HTTPD and given in the request
       callbacks.

METHODS

       url This method returns the URL of the current request as URI object.

       respond ([$res])
           $res can be:

           •   an array reference

               Then the array reference has these elements:

                  my ($code, $message, $header_hash, $content) =
                        [200, 'ok', { 'Content-Type' => 'text/html' }, '<h1>Test</h1>' }]

               You can remove most headers added by default (like "Cache-Control", "Expires", and
               "Content-Length") by setting them to undef, like so:

                  $req->respond([
                     200, 'OK', {
                       'Content-Type'  => 'text/html',
                       'Cache-Control' => 'max-age=3600',
                       'Expires'       => undef,
                     },
                     'This data will be cached for one hour.'
                  ]);

           •   a hash reference

               If it was a hash reference the hash is first searched for the "redirect" key and
               if that key does not exist for the "content" key.

               The value for the "redirect" key should contain the URL that you want to redirect
               the request to.

               The value for the "content" key should contain an array reference with the first
               value being the content type and the second the content.

           Here is an example:

              $httpd->reg_cb (
                 '/image/elmex' => sub {
                    my ($httpd, $req) = @_;

                    open IMG, "$ENV{HOME}/media/images/elmex.png"
                       or $req->respond (
                             [404, 'not found', { 'Content-Type' => 'text/plain' }, 'not found']
                          );

                    $req->respond ({ content => ['image/png', do { local $/; <IMG> }] });
                 }
              );

           How to send large files:

           For longer responses you can give a callback instead of a string to the response
           function for the value of the $content.

              $req->respond ({ content => ['video/x-ms-asf', sub {
                 my ($data_cb) = @_;

                 # start some async retrieve operation, for example use
                 # IO::AIO (with AnyEvent::AIO). Or retrieve chunks of data
                 # to send somehow else.

              } });

           The given callback will receive as first argument either another callback ($data_cb in
           the above example) or an undefined value, which means that there is no more data
           required and the transfer has been completed (either by you sending no more data, or
           by a disconnect of the client).

           The callback given to "respond" will be called whenever the send queue of the HTTP
           connection becomes empty (meaning that the data is written out to the kernel). If it
           is called you have to start delivering the next chunk of data.

           That doesn't have to be immediately, before the callback returns.  This means that you
           can initiate for instance an IO::AIO request (see also AnyEvent::AIO) and send the
           data later.  That is what the $data_cb callback is for. You have to call it once you
           got the next chunk of data. Once you sent a chunk of data via $data_cb you can just
           wait until your callback is called again to deliver the next chunk.

           If you are done transferring all data call the $data_cb with an empty string or with
           no argument at all.

           Please consult the example script "large_response_example" from the "samples/"
           directory of the AnyEvent::HTTPD distribution for an example of how to use this
           mechanism.

           NOTE: You should supply a 'Content-Length' header if you are going to send a larger
           file. If you don't do that the client will have no chance to know if the transfer was
           complete. To supply additional header fields the hash argument format will not work.
           You should use the array argument format for this case.

       responded
           Returns true if this request already has been responded to.

       parm ($key)
           Returns the first value of the form parameter $key or undef.

       params
           Returns list of parameter names.

       vars
           Returns a hash of form parameters. The value is either the value of the parameter, and
           in case there are multiple values present it will contain an array reference of
           values.

       method
           This method returns the method of the current request.

       content
           Returns the request content or undef if only parameters for a form were transmitted.

       headers
           This method will return a hash reference containing the HTTP headers for this HTTP
           request.

       client_host
           This method returns the host/IP of the HTTP client this request was received from.

       client_port
           This method returns the TCP port number of the HTTP client this request was received
           from.

COPYRIGHT & LICENSE

       Copyright 2008-2011 Robin Redeker, all rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.