JSON::RPC::Server::CGI - JSON-RPC sever for CGI


JSON-RPC documentation Contained in the JSON-RPC distribution.

Index


Code Index:

NAME

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JSON::RPC::Server::CGI - JSON-RPC sever for CGI

SYNOPSIS

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 # CGI version
 #--------------------------
 # In your CGI script
 use JSON::RPC::Server::CGI;

 my $server = JSON::RPC::Server::CGI->new;

 $server->dispatch('MyApp')->handle();

 # or  an array ref setting

 $server->dispatch( [qw/MyApp MyApp::Subclass/] )->handle();

 # or a hash ref setting

 $server->dispatch( {'/jsonrpc/API' => 'MyApp'} )->handle();

 


 #--------------------------
 # In your application class
 package MyApp;

 use base qw(JSON::RPC::Procedure); # Perl 5.6 or more than

 sub echo : Public {    # new version style. called by clients
     # first argument is JSON::RPC::Server object.
     return $_[1];
 }

 sub sum : Public(a:num, b:num) { # sets value into object member a, b.
     my ($s, $obj) = @_;
     # return a scalar value or a hashref or an arryaref.
     return $obj->{a} + $obj->{b};
 }

 sub a_private_method : Private {
     # ... can't be called by client
 }

 sub sum_old_style {  # old version style. taken as Public
     my ($s, @arg) = @_;
    return $arg[0] + $arg[1];
 }

DESCRIPTION

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Gets a client request.

Parses its JSON data.

Passes the server object and the object decoded from the JSON data to your procedure (method).

Takes your returned value (scalar or arrayref or hashref).

Sends a response.

Well, you write your procedure code only.

METHODS

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They are inherited from the JSON::RPC::Server methods basically. The below methods are implemented in JSON::RPC::Server::CGI.

new

Creates new JSON::RPC::Server::CGI object.

retrieve_json_from_post

retrieves a JSON request from the body in POST method.

retrieve_json_from_get

In the protocol v1.1, 'GET' request method is also allowable. it retrieves a JSON request from the query string in GET method.

response

returns a response JSON data to a client.

cgi

returns the CGI object.

SEE ALSO

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JSON::RPC::Server,

JSON::RPC::Procedure,

JSON,

http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html,

http://json-rpc.org/wiki/specification,

AUTHOR

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Makamaka Hannyaharamitu, <makamaka[at]cpan.org>

COPYRIGHT AND LICENSE

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JSON-RPC documentation Contained in the JSON-RPC distribution.

##############################################################################
package JSON::RPC::Server::CGI;

use strict;
use CGI;
use JSON::RPC::Server; # for old Perl 5.005

use base qw(JSON::RPC::Server);

$JSON::RPC::Server::CGI::VERSION = '0.92';

sub new {
    my $class = shift;
    my $self  = $class->SUPER::new();
    my $cgi   = $self->cgi;

    $self->request( HTTP::Request->new($cgi->request_method, $cgi->url) );
    $self->path_info($cgi->path_info);

    $self;
}


sub retrieve_json_from_post {
    my $json = $_[0]->cgi->param('POSTDATA');
    return $json;
}


sub retrieve_json_from_get {
    my $self   = shift;
    my $cgi    = $self->cgi;
    my $params = {};

    $self->version(1.1);

    for my $name ($cgi->param) {
        my @values = $cgi->param($name);
        $params->{$name} = @values > 1 ? [@values] : $values[0];
    }

    my $method = $cgi->path_info;

    $method =~ s{^.*/}{};
    $self->{path_info} =~ s{/?[^/]+$}{};

    $self->json->encode({
        version => '1.1',
        method  => $method,
        params  => $params,
    });
}


sub response {
    my ($self, $response) = @_;
    print "Status: " . $response->code . "\015\012" . $response->headers_as_string("\015\012")
           . "\015\012" . $response->content;
}


sub cgi {
    $_[0]->{cgi} ||= new CGI;
}



1;
__END__