Provided by: libweb-api-perl_2.4.1-1_all bug


       Web::API - A Simple base module to implement almost every RESTful API with just a few
       lines of configuration


       version 2.4.1


       NOTE: as of version 2.1 "strict_ssl" is enabled by default for obvious security reasons,
       this may break your current library implementation, sorry.

       Implement the RESTful API of your choice in 10 minutes, roughly.

           package Net::CloudProvider;

           use Mouse;

           with 'Web::API';

           our $VERSION = "0.1";

           has 'commands' => (
               is      => 'rw',
               default => sub {
                       list_nodes => { method => 'GET' },
                       node_info  => { method => 'GET', require_id => 1 },
                       create_node => {
                           method             => 'POST',
                           default_attributes => {
                               allowed_hot_migrate            => 1,
                               required_virtual_machine_build => 1,
                               cpu_shares                     => 5,
                               required_ip_address_assignment => 1,
                               primary_network_id             => 1,
                               required_automatic_backup      => 0,
                               swap_disk_size                 => 1,
                           mandatory => [
                       update_node => { method => 'PUT',    require_id => 1 },
                       delete_node => { method => 'DELETE', require_id => 1 },
                       start_node  => {
                           method       => 'POST',
                           require_id   => 1,
                           post_id_path => 'startup',
                       stop_node => {
                           method       => 'POST',
                           require_id   => 1,
                           post_id_path => 'shutdown',
                       suspend_node => {
                           method       => 'POST',
                           require_id   => 1,
                           post_id_path => 'suspend',

           sub commands {
               my ($self) = @_;
               return $self->commands;

           sub BUILD {
               my ($self) = @_;

               $self->user_agent(__PACKAGE__ . ' ' . $VERSION);
                       os        => 'template_id',
                       debian    => 1,
                       id        => 'label',
                       disk_size => 'primary_disk_size',

               return $self;


       later use as:

           use Net::CloudProvider;

           my $nc = Net::CloudProvider->new(user => 'foobar', api_key => 'secret');
           my $response = $nc->create_node({
               id                             => 'funnybox',
               hostname                       => '',
               os                             => 'debian',
               cpus                           => 2,
               memory                         => 256,
               disk_size                      => 5,
               allowed_hot_migrate            => 1,
               required_virtual_machine_build => 1,
               cpu_shares                     => 5,
               required_ip_address_assignment => 1,


       most important configuration part of the module which has to be provided by the module you
       are writing.

       the following keys are valid/possible:

           require_id (deprecated, use path)
           pre_id_path (deprecated, use path)
           post_id_path (deprecated, use path)

       the request path for commands is being build as:


       an example for "path":

           path => 'users/:user_id/labels'

       this will add "user_id" to the list of mandatory keys for this command automatically.

   base_url (required)
       get/set base URL to API, can include paths

   api_key (required in most cases)
       get/set API key (also used as basic auth password)

   user (optional)
       get/set API username/account name

   api_key_field (optional)
       get/set name of the hash key that has to hold the "api_key" e.g. in POST content payloads

   api_version (optional)
       get/set API version to be used

       default: 1

   mapping (optional)
       supply mapping table, hashref of format { "key" => "value", ... }

   wrapper (optional)
       get/set name of the key that is used to wrap all options of a command in.  unfortunately
       some APIs increase the depth of a hash by wrapping everything into a single key (who knows
       why...), which means this:


       turns %options into:

           { wrapper => \%options }

       before encoding and sending it off.

   header (optional)
       get/set custom headers sent with every request

       get/set authentication type. currently supported are only 'basic', 'header', 'hash_key',
       'get_params', 'oauth_header', 'oauth_params' or 'none'

       default: none

   auth_header (optional)
       get/set the name of the header used for Authorization credentials

       default: Authorization

   default_method (optional)
       get/set default HTTP method

       default: GET

   extension (optional)
       get/set file extension, e.g. '.json'

   user_agent (optional)
       get/set User Agent String

       default: "Web::API $VERSION"

   timeout (optional)
       get/set LWP::UserAgent timeout

   strict_ssl (optional)
       enable/disable strict SSL certificate hostname checking as a convenience alternatively you
       can supply your own LWP::Useragent compatible agent for the "agent" attribute.

       default: true

   agent (optional)
       get/set LWP::UserAgent object

   retry_http_codes (optional)
       get/set array of HTTP response codes that trigger a retry of the request

   retry_errors (optional)
       define an array reference of regexes that should trigger a retry of the request if matched
       against an error found via one of the "error_keys"

   retry_times (optional)
       get/set number of times a request will be retried at most

       default: 3

   retry_delay (optional)
       get/set delay to wait between retries. accepts float for millisecond support.

       default: 1.0

   content_type (optional)
       global content type, which is used for in and out going request/response headers and to
       encode and decode the payload if no other more specific content types are set, e.g.
       "incoming_content_type", "outgoing_content_type" or content types set individually per
       command attribute.

       default: 'text/plain'

   incoming_content_type (optional)
       default: undef

   outgoing_content_type (optional)
       default: undef

   debug (optional)
       enable/disabled debug logging

       default: false

   cookies (optional)
       this is used to store and retrieve cookies before and after requests were made to keep
       authenticated sessions alive for the time this object exists in memory you can add your
       own cookies to be send with every request. See HTTP::Cookies for more information.

       default: HTTP::Cookies->new()

   consumer_secret (required for all oauth_* auth_types)
       default: undef

   access_token (required for all oauth_* auth_types)
       default: undef

   access_secret (required for all oauth_* auth_types)
       default: undef

   signature_method (required for all oauth_* auth_types)
       default: undef

   encoder (custom options encoding subroutine)
       Receives "\%options" and "content-type" as the only 2 arguments and has to return a single

       default: undef

   decoder (custom response content decoding subroutine)
       Receives "content" and "content-type" as the only 2 scalar arguments and has to return a
       single hash reference.

       default: undef

   oauth_post_body (required for all oauth_* auth_types)
       enable/disable adding of command options as extra parameters to the OAuth request
       generation and therefor be included in the OAuth signature calculation.

       default: true

       get/set list of array keys that will be search for in the decoded response data structure.
       the same format as for mandatory keys is supported:


       will search for an error message at


       and if the key exists and its value is defined it will be provided as "$response-"{error}>
       and matched against all regexes from the `retry_errors` array ref if provided to trigger a
       retry on particular errors.


       generates new OAuth nonce for every request

       retry request with delay if "retry_http_codes" is set, otherwise just try once.

       returns true if the HTTP code or error found match either "retry_http_codes" or
       "retry_errors" respectively.  returns false otherwise.

       if "retry_errors" are defined it will try to decode the response content and store the
       decoded structure internally so we don't have to decode again at the end.

       needs the last response object and the 'Accept' content type header from the request for

       go through "error_keys" and find a potential error message in the decoded/parsed response
       and return it.

       configure in/out content types

       order of precedence: 1. per command "incoming_content_type" / "outgoing_content_type" 2.
       per command general "content_type" 3. content type based on file path extension (only for
       incoming) 4. global "incoming_content_type" / "outgoing_content_type" 5. global general

       catch DESTROY call and tear down / clean up if necessary at this point there is nothing to
       do though. This prevents AUTOLOAD from logging an unknown command error message

   AUTOLOAD magic
       install a method for each new command and call it in an "eval {}" to catch exceptions and
       set an error in a unified way.


       Please report any bugs or feature requests on GitHub's issue tracker
       <>.  Pull requests welcome.


       You can find documentation for this module with the perldoc(1) command.

           perldoc Web::API

       You can also look for information at:

       ·   GitHub repository


       ·   MetaCPAN


       ·   AnnoCPAN: Annotated CPAN documentation


       ·   CPAN Ratings



       HTTP::Cookies, LWP::UserAgent, Net::OAuth


       Tobias Kirschstein <>


       This software is Copyright (c) 2013 by Tobias Kirschstein.

       This is free software, licensed under:

         The (three-clause) BSD License