#!/usr/bin/env php

<?php

​

// Disclaimer: This is an example script intended to be used as an example.

// This is provided as-is and it may not fill all or any of the specific needs

// the user of this script has. The user of this script can change or alter any

// or all of the functionalities described in this script to fit their own needs.

​

use Aws\S3\S3Client;

use GuzzleHttp\Client;

use GuzzleHttp\Exception\RequestException;

​

// Example script for copying backups of several sites through the REST API to

// an external S3 bucket.

// Two things are left up to the script user:

// - Including Guzzle and AWS SDK, which is used by request() and upload_to_s3()

//   e.g. by doing:

//  composer init

//  composer require guzzlehttp/guzzle

//  composer require aws/aws-sdk-php

require 'vendor/autoload.php';

​

// - Populating $config:

$config = [

 // URL of a subsection inside the SF REST API; must end with sites/.

 'url' => 'https://www.myfactory.acsitefactory.com/api/v1/sites/',

 'api_user' => '',

 'api_key' => '',

​

 // Site IDs of the sites to process; can also be provided as CLI argument.

 'sites' => [],

​

 // Request parameter for /api/v1#List-sites.

 'limit' => 100,

​

 // Sets if the backups should be uploaded to S3. If set to FALSE, backups will

 // be kept locally.

 'upload_to_s3' => TRUE,

​

 // The aws config to where it should be uploaded to.

 's3_config' => [

   'bucket' => '',

   'region' => '',

   'key' => '',

   'secret' => '',

 ],

];

​

if ($argc < 2 || $argc > 3 || !in_array($argv[1], array('fetch-and-upload'), TRUE)) {

 $help = <<<EOT

   Usage: php backup_migration.php fetch-and-upload [site_ids].

   Where:

   - [site_ids] is be either a comma separated list (e.g. 111,222,333) or 'all'

EOT;

 echo $help;

 exit(1);

}

​

// Lower the 'limit' parameter to the maximum which the API allows.

if ($config['limit'] > 100) {

 echo "\nLimit set to 100!";

 $config['limit'] = 100;

}

​

// Check if the list of sites in $config is to be overridden by the provided

// input. If the input is set to 'all' then fetch the list of sites using the

// Site Factory API, otherwise it should be a comma separated list of site IDs.

if ($argc >= 3) {

 if ($argv[2] == 'all') {

   $config['sites'] = get_all_sites($config);

 }

 else {

   // Removing spaces.

   $no_spaces = str_replace(' ', '', $argv[2]);

​

   // Keeping only IDs that are valid.

   $config['sites'] = array_filter(explode(',', $no_spaces), "id_check");

​

   // Removing duplicates.

   $config['sites'] = array_unique($config['sites']);

 }

}

​

// Helper; returns true if given ID is valid (numeric and > 0), false otherwise.

function id_check($id) {

 return is_numeric($id) && $id > 0;

}

​

// Fetches the list of all sites using the Site Factory REST API.

function get_all_sites($config) {

 // Starting from page 1.

 $page = 1;

​

 $sites = array();

​

 printf("Getting all sites - Limit / request: %d\n", $config['limit']);

​

 // Iterate through the paginated list until we get all sites, or

 // an error occurs.

 do {

   printf("Getting sites page: %d\n", $page);

​

   $method = 'GET';

   $url = $config['url'] . "?limit=" . $config['limit'] . "&page=" . $page;

   $has_another_page = FALSE;

   $res = request($url, $method, $config);

​

   if ($res->getStatusCode() != 200) {

     echo "Error whilst fetching site list!\n";

     exit(1);

   }

​

   $next_page_header = $res->getHeader('link');

   $response = json_decode($res->getBody()->getContents());

​

   foreach ($response->sites as $site) {

     $sites[] = $site->id;

   }

​

   // If the next page header is present and has a "next" link, we know we

   // have another page.

   if (!empty($next_page_header) && strpos($next_page_header[0], 'rel="next"') !== FALSE) {

     $has_another_page = TRUE;

     $page++;

     // Sleeping for 1 second to prevent DoSing the factory API.

     sleep(1);

   }

 } while ($has_another_page);

​

 return $sites;

}

​

// Helper function to return API user and key.

function get_request_auth($config) {

 return [

   'auth' => [$config['api_user'], $config['api_key']],

 ];

}

​

// Sends a request using the guzzle HTTP library; prints out any errors.

function request($url, $method, $config, $form_params = []) {

 // We are setting http_errors => FALSE so that we can handle them ourselves.

 // Otherwise, we cannot differentiate between different HTTP status codes

 // since all 40X codes will just throw a ClientError exception.

 $client = new Client(['http_errors' => FALSE]);

​

 $parameters = get_request_auth($config);

 if ($form_params) {

   $parameters['form_params'] = $form_params;

 }

​

 try {

   $res = $client->request($method, $url, $parameters);

   return $res;

 }

 catch (RequestException $e) {

   printf("Request exception!\nError message %s\n", $e->getMessage());

 }

​

 return NULL;

}

​

// Downloads the backup locally.

function download_backup($url, $filename) {

 printf("Downloading backup %s. This might take a while..\n", $filename);

 $handle = fopen($filename, 'w');

 $client = new Client(array(

   'base_uri' => '',

   'verify' => false,

   'sink' => $filename,

   'curl.options' => array(

       'CURLOPT_RETURNTRANSFER' => true,

       'CURLOPT_FILE' => $handle

   )

 ));

​

 $client->get($url);

 fclose($handle);

}

​

// Uploads the backup to the given S3 bucket.

function upload_to_s3($filename, $config) {

 printf("Uploading backup %s to S3. This might take a while..\n", $filename);

 $s3 = new S3Client([

   'version' => 'latest',

   'region' => $config['s3_config']['region'],

   'credentials' => [

     'key' => $config['s3_config']['key'],

     'secret' => $config['s3_config']['secret'],

   ],

 ]);

 $s3->putObject([

   'Bucket' => $config['s3_config']['bucket'],

   'Key' => $filename,

   'Body' => fopen($filename, 'r'),

 ]);

}

​

// Fetches the temporary URL to download the backup from the ACSF S3 bucket.

function fetch_temporary_backup_url($backup_id, $site_nid, $config) {

 $url = $config['url'] . $site_nid . '/backups/' . $backup_id . '/url';

 $res = request($url, 'GET', $config);

 if (!$res) {

   // An exception was thrown.

   printf('Error whilst fetching backup id %d for site id %d', $backup_id, $site_nid);

   printf("Please check the above messages for the full error.\n");

   return NULL;

 }

 elseif ($res->getStatusCode() != 200) {

   printf('Error whilst fetching backup id %d for site id %d', $backup_id, $site_nid);

   printf("HTTP code %d\n", $res->getStatusCode());

   $body = json_decode($res->getBody()->getContents());

   printf("Error message: %s\n", $body ? $body->message : '<empty>');

   return NULL;

 }

 $body = json_decode($res->getBody()->getContents());

 return $body->url;

​

}

​

// Iterates through each backup, downloads and stores it in the desired place.

function get_and_upload_backups($backups, $site_nid, $config) {

 foreach ($backups as $backup) {

   $url = fetch_temporary_backup_url($backup->id, $site_nid, $config);

​

   preg_match('/[a-z0-9_\.]+\.gz/', $url, $matches);

   $backup_name = $matches[0];

​

   download_backup($url, $backup_name);

   if ($config['upload_to_s3']) {

     upload_to_s3($backup_name, $config);

     printf("Upload successful!\n");

     unlink($backup_name);

   }

 }

}

​

// Fetches backups from the factory and then uploads them to S3.

function backup_fetch($operation, $config) {

 $endpoint = '/backups';

 $message = "Fetching backups for %d.\n";

 $method = 'GET';

​

 for ($i = 0; $i < count($config['sites']); $i++) {

   // Sending API request.

   $url = $config['url'] . $config['sites'][$i] . $endpoint;

   $res = request($url, $method, $config);

​

   $message_site = sprintf($message, $config['sites'][$i]);

   // If request returned an error, we show that and

   // we continue with another site.

   if (!$res) {

     // An exception was thrown.

     printf('Error whilst %s', $message_site);

     printf("Please check the above messages for the full error.\n");

     continue;

   }

   elseif ($res->getStatusCode() != 200) {

     printf('Error whilst %s', $message_site);

     printf("HTTP code %d\n", $res->getStatusCode());

     $body = json_decode($res->getBody()->getContents());

     printf("Error message: %s\n", $body ? $body->message : '<empty>');

     continue;

   }

​

   // All good here.

   echo $message_site;

   $body = json_decode($res->getBody()->getContents());

   get_and_upload_backups($body->backups, $config['sites'][$i], $config);

 }

}

​

backup_fetch($argv[1], $config);