CloudStack Client Generator

Command line tool that fetches and parses the online reference for CloudStack API and generates the client class in PHP, Python or Perl with in-code documentation. You can generate a client in any other language (Java, C++, ObjectiveC, etc.) by adding class templates to the templates/ directory.

See https://github.com/jhancock/cloudstack-php-client for the latest PHP client. See https://github.com/jhancock/cloudstack-perl-client for the latest Perl client. See https://github.com/jhancock/cloudstack-python-client for the latest Python client.

Description

The table of content of the API reference lists all the methods. Each method has its own page. The data that the script fetches for each method is:

the method name
the method description
for each argument:
- the argument name
- the argument description
- wether if the argument is required or not

Here is an example of a method generated that has one argument required (id) and one not (forced):

/**
 * Stops a virtual machine.
 *
 * @param array $args An associative array. The following are options for keys:
 *     id - The ID of the virtual machine
 *     forced - Force stop the VM.  The caller knows the VM is stopped.
 */
public function stopVirtualMachine($args=array()) {

    if (empty($args['id'])) {
        throw new CloudStackClientException(sprintf(MISSING_ARGUMENT_MSG, 'id'), MISSING_ARGUMENT);
    }

    return $this->request('stopVirtualMachine', $args);
}

Usage

Just run the script, it will generate all the methods.

php generator.php class

Output:

<?php
require_once dirname(__FILE__) . "/BaseCloudStackClient.php";
require_once dirname(__FILE__) . "/CloudStackClientException.php";

class CloudStackClient extends BaseCloudStackClient {

    /**
     * Stops a virtual machine.
     *
     * @param array $args An associative array. The following are options for keys:
     *     id - The ID of the virtual machine
     *     forced - Force stop the VM.  The caller knows the VM is stopped.
     */
    public function stopVirtualMachine($args=array()) {

        if (empty($args['id'])) {
            throw new CloudStackClientException(sprintf(MISSING_ARGUMENT_MSG, 'id'), MISSING_ARGUMENT);
        }

        return $this->request('stopVirtualMachine', $args);
    }

    ...
}

Configuration

The configuration is set in config.yml with the Yaml format:

# URL of the API reference table of contents
# http://cloud.mindtouch.us/CloudStack_Documentation/API_Reference%3A_CloudStack
api_ref_toc_url: http://download.cloud.com/releases/3.0.0/api_3.0.0/TOC_Root_Admin.html 

# Language for generated code (supported: php, python, perl)
language: php

# Generated class name
class_name: CloudStackClient

Debuging

As the DOM of the online documentation may change, here is some tools to inquire the change. Three steps are crucial:

The URL of the online documentation table of content of the latest version of the API. To be modified in the config file.
The link black list: links to ignore in all the links from the table of content. To be modified in the function getAllLinks() of generator.php.
The page scraper if the DOM change, to be modified in the function fetchMethodData() in generator.php.

The code is well documented, it should not be too difficult to understand and tweak it.

Dump links

This command is great to debug a change in the URL pattern of the online documentation. It should output all the links that are on the table of contents (the URL is in the config file):

php generator.php links

Example:

$ php generator.php links
global_admin/deployVirtualMachine.html - deployVirtualMachine (A)
global_admin/destroyVirtualMachine.html - destroyVirtualMachine (A)
global_admin/rebootVirtualMachine.html - rebootVirtualMachine (A)
global_admin/startVirtualMachine.html - startVirtualMachine (A)
global_admin/stopVirtualMachine.html - stopVirtualMachine (A)
global_admin/resetPasswordForVirtualMachine.html - resetPasswordForVirtualMachine (A)
global_admin/changeServiceForVirtualMachine.html - changeServiceForVirtualMachine (A)
...

Dump method data

This command shows what data is fetched from the page of one method.