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Simple PHP client for EGroupware REST API using PHP Curl extension
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ralf
parent
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commit
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187
doc/REST-CalDAV-CardDAV/api-client.php
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187
doc/REST-CalDAV-CardDAV/api-client.php
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<?php
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/**
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* EGroupware - REST API client for PHP
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*
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* @link https://www.egroupware.org
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* @license https://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage caldav/rest
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* @author Ralf Becker <rb-at-egroupware.org>
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* @copyright (c) 2024 by Ralf Becker <rb-at-egroupware.org>
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*/
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/* Example usage of this client:
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require_once('/path/to/egroupware/doc/api-client.php');
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if (PHP_SAPI !== 'cli')
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{
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die('This script can only be run from the command line.');
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}
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$base_url = 'https://egw.example.org/egroupware/groupdav.php';
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$authorization[parse_url($base_url, PHP_URL_HOST)] = 'Authorization: Basic '.base64_encode('sysop:secret');
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$params = [
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'filters[info_status]' => 'archive',
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];
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$courses = [];
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foreach(apiIterator('/infolog/', $params) as $infolog)
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{
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echo json_encode($infolog, JSON_UNESCAPED_SLASHES|JSON_UNESCAPED_UNICODE|JSON_PRETTY_PRINT)."\n";
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foreach($infolog['participants'] as $account_id => $participant)
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{
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if ($participant['roles']['owner'] ?? false)
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{
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echo json_encode($contact=api('/addressbook-accounts/'.$account_id),JSON_UNESCAPED_SLASHES|JSON_UNESCAPED_UNICODE|JSON_PRETTY_PRINT)."\n";
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break;
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}
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}
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}
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*/
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/**
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* Iterate through API calls on collections
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*
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* This function only queries a limited number of entries (default 100) and uses sync-token to query more.
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*
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* @param string $url either path (starting with / and prepending global $base_url) or full URL
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* @param array& $params can contain optional "sync-token" (default="") and "nresults" (default=100) and returns final "sync-token"
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* @return Generator<array> yields array with additional value for key "@self" containing the key of the responses-object yielded
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* @throws JsonException|Exception see api
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*/
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function apiIterator(string $url, array &$params=[])
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{
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while(true)
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{
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if (!isset($params['nresults']))
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{
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$params['nresults'] = 100;
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}
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if (!isset($params['sync-token']))
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{
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$params['sync-token']='';
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}
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$responses = api($url, 'GET', $params);
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if (!isset($responses['responses']))
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{
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throw new \Exception('Invalid respose: '.(is_scalar($responses) ? $responses : json_encode($responses)));
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}
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foreach($responses['responses'] as $self => $response)
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{
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$response['@self'] = $self;
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yield $response;
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}
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$params['sync-token'] = $responses['sync-token'] ?? '';
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if (empty($responses['more-results']))
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{
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return;
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}
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}
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}
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/**
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* Make an API call to given URL
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*
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* Authorization is added from global $authorization array indexed by host-name of $url or $base_url
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*
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* @param string $url either path (starting with / and prepending global $base_url) or full URL
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* @param string $method
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* @param string|array|resource $body for GET&DELETE this is added as query and must not be a resource/file-handle
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* @param array $header
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* @param array|null $response_header associative array of response headers, key 0 has HTTP status
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* @param int $follow how many redirects to follow, default 3, can be set to 0 to NOT follow
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* @return array|string array of decoded JSON or string body
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* @throws JsonException for invalid JSON
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* @throws Exception with code=0: opening http connection, code=HTTP status, if status is NOT 2xx
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*/
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function api(string $url, string $method='GET', $body='', array $header=['Content-Type: application/json'], ?array &$response_header=null, int $follow=3)
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{
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global $base_url, $authorization;
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if ($url[0] === '/')
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{
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$url = $base_url . $url;
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}
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if (in_array(strtoupper($method), ['GET', 'DELETE']) && $body && !is_resource($body))
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{
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$url .= '?' . (is_array($body) ? http_build_query($body) : $body);
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}
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if (!($curl = curl_init($url)))
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{
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throw new Exception(curl_error($curl));
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}
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($curl, CURLOPT_HEADER, true);
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if ($follow > 0)
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{
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curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($curl, CURLOPT_MAXREDIRS, $follow);
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}
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switch (strtoupper($method))
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{
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case 'POST':
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curl_setopt($curl, CURLOPT_POST, true);
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break;
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case 'PUT':
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case 'DELETE':
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case 'PATCH':
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curl_setopt($curl, CURLOPT_CUSTOMREQUEST, strtoupper($method));
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break;
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case 'GET':
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curl_setopt($curl, CURLOPT_HTTPGET, true);
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break;
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}
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$header = array_merge($header, ['User-Agent: '.basename(__FILE__, '.php'), $authorization[parse_url($url, PHP_URL_HOST)]]);
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if (in_array(strtoupper($method), ['POST', 'PUT', 'PATCH']))
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{
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if (is_resource($body))
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{
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fseek($body, 0, SEEK_END);
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curl_setopt($curl, CURLOPT_INFILESIZE, ftell($body));
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fseek($body, 0);
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}
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curl_setopt($curl, is_resource($body) ? CURLOPT_INFILE : CURLOPT_POSTFIELDS, is_array($body) ? json_encode($body) : $body);
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}
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if (!array_filter($header, function($header)
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{
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return stripos($header, 'Accept:') === 0;
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}))
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{
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$header[] = 'Accept: application/json';
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}
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curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
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$response_header = [];
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if (($response = curl_exec($curl)) === false)
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{
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throw new Exception(curl_error($curl), 0);
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}
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do {
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[$rheader, $response] = explode("\r\n\r\n", $response, 2);
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foreach (explode("\r\n", $rheader) as $line)
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{
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list($key, $value) = explode(':', $line, 2) + [null, null];
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if (!isset($value))
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{
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$response_header[0] = $key;
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}
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else
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{
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$response_header[strtolower($key)] = trim($value);
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}
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}
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[, $http_status] = explode(' ', $response_header[0], 2);
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}
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while ($http_status[0] === '3' && $follow && preg_match('#^HTTP/[\d.]+ \d+#', $response));
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if ($http_status[0] !== '2')
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{
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throw new Exception("Unexpected HTTP status code $http_status: $response", (int)$http_status);
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}
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if ($response !== '' && preg_match('#^application/([^+; ]+\+)?json(;|$)#', $response_header['content-type']))
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{
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return json_decode($response, true, 512, JSON_THROW_ON_ERROR);
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}
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return $response;
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}
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