Yusuke Wada > WebService-Simple > WebService::Simple

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Module Version: 0.21   Source  

NAME ^

WebService::Simple - Simple Interface To Web Services APIs

SYNOPSIS ^

  use WebService::Simple;

  # Simple use case
  my $flickr = WebService::Simple->new(
    base_url => "http://api.flickr.com/services/rest/",
    param    => { api_key => "your_api_key", }
  );

  # send GET request to 
  # http://api.flickr.com/service/rest/?api_key=your_api_key&method=flickr.test.echo&name=value
  $flickr->get( { method => "flickr.test.echo", name => "value" } );

  # send GET request to 
  # http://api.flickr.com/service/rest/extra/path?api_key=your_api_key&method=flickr.test.echo&name=value
  $flickr->get( "extra/path",
    { method => "flickr.test.echo", name => "value" });

DESCRIPTION ^

WebService::Simple is a simple class to interact with web services.

It's basically an LWP::UserAgent that remembers recurring api URLs and parameters, plus sugar to parse the results.

METHODS ^

new(%args)
    my $flickr = WebService::Simple->new(
        base_url => "http://api.flickr.com/services/rest/",
        param    => { api_key => "your_api_key", },
        # debug    => 1
    );

Create and return a new WebService::Simple object. "new" Method requires a base_url of Web Service API. If debug is set, dump a request URL in get or post method.

get([$extra_path,] $args)
    my $response =
      $flickr->get( { method => "flickr.test.echo", name => "value" } );

Send GET request, and you can get the WebService::Simple::Response object. If you want to add a path to base URL, use an option parameter.

    my $lingr = WebService::Simple->new(
        base_url => "http://www.lingr.com/",
        param    => { api_key => "your_api_key", format => "xml" }
    );
    my $response = $lingr->get( 'api/session/create', {} );
post([$extra_path,] $args)

Send POST request.

request_url($extra_path, $args)

Return reequest URL.

base_url
basic_params
cache
response_parser

SUBCLASSING ^

For better encapsulation, you can create subclass of WebService::Simple to customize the behavior

  package WebService::Simple::Flickr;
  use base qw(WebService::Simple);
  __PACKAGE__->config(
    base_url => "http://api.flickr.com/services/rest/",
    upload_url => "http://api.flickr.com/services/upload/",
  );

  sub test_echo
  {
    my $self = shift;
    $self->get( { method => "flickr.test.echo", name => "value" } );
  }

  sub upload
  {
    my $self = shift;
    local $self->{base_url} = $self->config->{upload_url};
    $self->post( 
      Content_Type => "form-data",
      Content => { title => "title", description => "...", photo => ... },
    );
  }

PARSERS ^

Web services return their results in various different formats. Or perhaps you require more sophisticated results parsing than what WebService::Simple provides.

WebService::Simple by default uses XML::Simple, but you can easily override that by providing a parser object to the constructor:

  my $service = WebService::Simple->new(
    response_parser => AVeryComplexParser->new,
    ...
  );
  my $response = $service->get( ... );
  my $thing = $response->parse_response;

For example. If you want to set XML::Simple options, use WebService::Simple::Parser::XML::Simple including this module:

  use WebService::Simple;
  use WebService::Simple::Parser::XML::Simple;
  use XML::Simple;
  
  my $xs = XML::Simple->new( KeyAttr => [], ForceArray => ['entry'] );
  my $service = WebService::Simple->new(
      base_url => "http://gdata.youtube.com/feeds/api/videos",
      param    => { v => 2 },
      response_parser =>
        WebService::Simple::Parser::XML::Simple->new( xs => $xs ),
  );

This allows great flexibility in handling different webservices

CACHING ^

You can cache the response of Web Service by using Cache object.

  my $cache   = Cache::File->new(
      cache_root      => '/tmp/mycache',
      default_expires => '30 min',
  );
  
  my $flickr = WebService::Simple->new(
      base_url => "http://api.flickr.com/services/rest/",
      cache    => $cache,
      param    => { api_key => "your_api_key, }
  );

REPOSITORY ^

https://github.com/yusukebe/WebService-Simple

AUTHOR ^

Yusuke Wada <yusuke@kamawada.com>

Daisuke Maki <daisuke@endeworks.jp>

Matsuno Tokuhiro

Naoki Tomita (tomi-ru)

COPYRIGHT AND LICENSE ^

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

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