JSON::RPC::Client(3) Perl implementation of JSON-RPC client

SYNOPSIS


use JSON::RPC::Client;

my $client = new JSON::RPC::Client;
my $url = 'http://www.example.com/jsonrpc/API';

my $callobj = {
method => 'sum',
params => [ 17, 25 ], # ex.) params => { a => 20, b => 10 } for JSON-RPC v1.1
};

my $res = $client->call($uri, $callobj);

if($res) {
if ($res->is_error) {
print "Error : ", $res->error_message;
}
else {
print $res->result;
}
}
else {
print $client->status_line;
}


# Easy access

$client->prepare($uri, ['sum', 'echo']);
print $client->sum(10, 23);

DESCRIPTION

This is JSON-RPC Client. See <http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html>.

Gets a perl object and convert to a JSON request data.

Sends the request to a server.

Gets a response returned by the server.

Converts the JSON response data to the perl object.

JSON::RPC::Client

METHODS

$client = JSON::RPC::Client->new
Creates new JSON::RPC::Client object.
$response = $client->call($uri, $procedure_object)
Calls to $uri with $procedure_object. The request method is usually "POST". If $uri has query string, method is "GET".

About 'GET' method, see to <http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html#GetProcedureCall>.

Return value is ``JSON::RPC::ReturnObject''.

$client->prepare($uri, $arrayref_of_procedure)
Allow to call methods in contents of $arrayref_of_procedure. Then you can call the prepared methods with an array reference or a list.

The return value is a result part of JSON::RPC::ReturnObject. 

   $client->prepare($uri, ['sum', 'echo']);
   
   $res = $client->echo('foobar');  # $res is 'foobar'.
   
   $res = $client->sum(10, 20);     # sum up
   $res = $client->sum( [10, 20] ); # same as above

If you call a method which is not prepared, it will "croak".

Currently, can't call any method names as same as built-in methods.

version
Sets the JSON-RPC protocol version. 1.1 by default.
id
Sets a request identifier. In JSON-RPC 1.1, it is optoinal.

If you set "version" 1.0 and don't set id, the module sets 'JSON::RPC::Client' to it.

ua
Setter/getter to LWP::UserAgent object.
json
Setter/getter to the JSON coder object. Default is JSON, likes this: 

   $self->json( JSON->new->allow_nonref->utf8 );
   
   $json = $self->json;

This object serializes/deserializes JSON data. By default, returned JSON data assumes UTF-8 encoded.

status_line
Returns status code; After "call" a remote procedure, the status code is set.
create_json_coder
(Class method) Returns a JSON de/encoder in "new". You can override it to use your favorite JSON de/encoder.

JSON::RPC::ReturnObject

"call" method or the methods set by "prepared" returns this object. (The returned JSON data is decoded by the JSON coder object which was passed by the client object.)

METHODS

is_success
If the call is successful, returns a true, otherwise a false.
is_error
If the call is not successful, returns a true, otherwise a false.
error_message
If the response contains an error message, returns it.
result
Returns the result part of a data structure returned by the called server.
content
Returns the whole data structure returned by the called server.
jsontext
Returns the row JSON data.
version
Returns the version of this response data.

JSON::RPC::ServiceObject

RESERVED PROCEDURE

When a client call a procedure (method) name 'system.foobar', JSON::RPC::Server look up MyApp::system::foobar.

<http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html#ProcedureCall>

<http://json-rpc.org/wd/JSON-RPC-1-1-WD-20060807.html#ServiceDescription>

There is JSON::RPC::Server::system::describe for default response of 'system.describe'.

AUTHOR

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

COPYRIGHT AND LICENSE

Copyright 2007-2008 by Makamaka Hannyaharamitu

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

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