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WebService-CRUST-0.3
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/ WebService::CRUST

NAME

WebService::CRUST - A lightweight Client for making REST calls

SYNOPSIS

Simple:

## Connect to Yahoo's Time service to see what time it is.

use WebService::CRUST;
use Data::Dumper;

my $url = 'http://developer.yahooapis.com/TimeService/V1/getTime';
my $w = new WebService::CRUST;

print Dumper $w->get($url, appid => 'YahooDemo');

Slightly more complex example, where we connect to Amazon and get a list of albums by the Magnetic Fields:

## Connect to Amazon and get a list of all the albums by the Magnetic Fields

my $w = new WebService::CRUST(
  base => 'http://webservices.amazon.com/onca/xml?Service=AWSECommerceService',
  request_key => 'Operation',
  params => { AWSAccessKeyId => 'my_amazon_key' }
);

my $result = $w->ItemSearch(
  SearchIndex => 'Music',
  Keywords => 'Magnetic Fields'
)->{Items};

for (@{$result->{Item}}) {
  printf "%s - %s\n", 
    $_->{ASIN}, 
    $_->{ItemAttributes}->{Title};
}

CONSTRUCTOR

new

my $w = new WebService::CRUST( <options> );

OPTIONS

base

Sets a base URL to perform actions on. Example:

my $w = new WebService::CRUST(base => 'http://somehost.com/API/');
$w->get('foo'); # calls http://somehost.com/API/foo
$w->foo;        # Same thing but AUTOLOADED

params

Pass hashref of options to be sent with every query. Example:

my $w = new WebService::CRUST( params => { appid => 'YahooDemo' });
$w->get('http://developer.yahooapis.com/TimeService/V1/getTime');

Or combine with base above to make your life easier:

my $w = new WebService::CRUST(
  base => 'http://developer.yahooapis.com/TimeService/V1/',
  params => { appid => 'YahooDemo' }
);
$w->getTime(format => 'ms');

request_key

Use a specific param argument for the action veing passed, for instance, when talking to Amazon, instead of calling /method you have to call ?Operation=method. Here's some example code:

my $w = new WebService::CRUST(
  base => 'http://webservices.amazon.com/onca/xml?Service=AWSECommerceService',
  request_key => 'Operation',
  params => { AWSAccessKeyId => 'my_key' }
);

$w->ItemLookup(ItemId => 'B00000JY1X');
# does a GET on http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&Operation=ItemLookup&ItemId=B00000JY1X&AWSAccessKeyId=my_key

timeout

Number of seconds to wait for a request to return. Default is LWP's default (180 seconds).

ua

Pass an LWP::UserAgent object that you want to use instead of the default.

format

What format to use. Defaults to XML::Simple. To use something like JSON:

my $w = new WebService::CRUST(format => [ 'JSON', 'objToJson' ]);
$w->get($url);

The second argument can also be a coderef, so for instance:

my $w = new WebService::CRUST(
    format => [ 'JSON::Syck', sub { JSON::Syck::Load(shift) } ]
);
$w->get($url);

Formatter classes are loaded dynamically if needed, so you don't have to 'use' them first.

head2 basic_username

The HTTP_BASIC username to send for authentication

head2 basic_password

The HTTP_BASIC password to send for authentication

my $w = new WebService::CRUST(
    basic_username => 'user',
    basic_password => 'pass'
);
$w->get('http://something/');

opts

A hashref of alternate options to pass the data formatter.

debug

Turn debugging on or off.

METHODS

get

Performs a GET request with the specified options. Returns undef on failure.

Performs a HEAD request with the specified options. Returns undef on failure.

put

Performs a PUT request with the specified options. Returns undef on failure.

If -content is passed as a parameter, that will be set as the content of the PUT request:

$w->put('something', { -content => $content });

post

Performs a POST request with the specified options. Returns undef on failure.

request

Same as get/post except the first argument is the method to use.

my $w = new WebService::CRUST;
$w->request( 'HEAD', $url );

Returns undef on failure.

response

The HTTP::Response of the last request.

$w->get('action');
$w->response->code eq 200 and print "Success\n";

$w->get('invalid_action') or die $w->response->status_line;

ua

Get or set the LWP::UserAgent object.

debug

Mostly internal method for debugging. Prints a message to STDERR by default.

AUTOLOAD

WebService::CRUST has some AUTOLOAD syntactical sugar, such that the following are equivalent:

my $w = new WebService::CRUST(base => 'http://something/');

# GET request examples
$w->get('foo', key => $val);
$w->get_foo(key => $val);
$w->foo(key => $val);

# POST request examples
$w->post('foo', key => $val);
$w->post_foo(key => $val);

The pattern is $obj->(get|head|post|put)_methodname;

Additionally, instead of accessing keys in a hash, you can call them as methods:

my $response = $w->foo(key => $val);

# These are equivalent
$response->{bar}->{baz};
$response->bar->baz;

If an element of your object returns with a key called "CRUST__Result", we will auto inflate to another URL. See WebService::CRUST::Result for more.

SEE ALSO

WebService::CRUST::Result, Catalyst::Model::WebService::CRUST, LWP, XML::Simple

AUTHOR

Chris Heschong <chris@wiw.org>