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<?php
/**
* @file repository.php
* @brief OpenGnsys Repository REST API manager.
* @warning All input and output messages are formatted in JSON.
* @note Some ideas are based on article "How to create REST API for Android app using PHP, Slim and MySQL" by Ravi Tamada, thanx.
* @license GNU GPLv3+
* @author Juan Manuel Bardallo SIC Universidad de Huelva
* @version 1.0
* @date 2016-04-06
*/
// Auxiliar functions.
/**
* @brief Validate API key included in "Authorization" HTTP header.
* @return JSON response on error.
*/
function validateRepositoryApiKey() {
$response = array();
$app = \Slim\Slim::getInstance();
// Assign user id. that match this key to global variable.
@$apikey = htmlspecialchars(function_exists('apache_request_headers') ? apache_request_headers()['Authorization'] : $_SERVER['HTTP_AUTHORIZATION']);
if (isset($apikey)) {
// fetch repository token from ogAdmRepo.cfg configuration file.
@$confFile = parse_ini_file('../../etc/ogAdmRepo.cfg', 'r');
if ($confFile) {
if(@strcmp($apikey, $confFile['ApiToken']) == 0) {
// Credentials OK.
return true;
} else {
// Credentials error.
$response['message'] = 'Login failed. Incorrect credentials';
jsonResponse(401, $response);
$app->stop();
}
} else {
// Cannot access configuration file.
$response['message'] = "An error occurred, please try again";
jsonResponse(500, $response);
$app->stop();
}
} else {
// Error: missing API key.
$response['message'] = 'Missing Repository API key';
jsonResponse(400, $response);
$app->stop();
}
}
function commandExist($cmd) {
$returnVal = shell_exec("which $cmd");
return (empty($returnVal) ? false : true);
}
// Define REST routes.
/**
* @brief List all images in the repository
* @note Route: /repository/images, Method: GET
* @param no
* @return JSON object with directory, images array, ous array and disk data.
*/
$app->get('/repository/images(/)', 'validateRepositoryApiKey',
function() use ($app) {
$response = array();
// Read repository information file.
$cfgFile = '/opt/opengnsys/etc/repoinfo.json';
$response = json_decode(@file_get_contents($cfgFile), true);
// Check if directory exists.
$imgPath = @$response['directory'];
if (is_dir($imgPath)) {
// Complete global image information.
for ($i=0; $i<sizeof(@$response['images']); $i++) {
$img = $response['images'][$i];
$file = $imgPath."/".($img['type']==="dir" ? $img["name"] : $img["name"].".".$img["type"]);
$response['images'][$i]['size'] = @stat($file)['size'];
$response['images'][$i]['modified'] = date("Y-m-d H:i:s", @stat($file)['mtime']);
$response['images'][$i]['mode'] = substr(decoct(@stat($file)['mode']), -4);
$backupfile = "$file.ant";
if (file_exists($backupfile)) {
$response['images'][$i]['backedup'] = true;
$response['images'][$i]['backupsize'] = @stat($backupfile)['size'];
} else {
$response['images'][$i]['backedup'] = false;
}
$lockfile = "$file.lock";
$response['images'][$i]['locked'] = file_exists($lockfile);
}
// Complete image in OUs information.
for ($j=0; $j<sizeof(@$response['ous']); $j++) {
for ($i=0; $i<sizeof(@$response['ous'][$j]['images']); $i++) {
$img = $response['ous'][$j]['images'][$i];
$file = $imgPath."/".$response['ous'][$j]['subdir']."/".($img['type']==="dir" ? $img["name"] : $img["name"].".".$img["type"]);
$response['ous'][$j]['images'][$i]['size'] = @stat($file)['size'];
$response['ous'][$j]['images'][$i]['modified'] = date("Y-m-d H:i:s", @stat($file)['mtime']);
$response['ous'][$j]['images'][$i]['mode'] = substr(decoct(@stat($file)['mode']), -4);
$response['ous'][$j]['images'][$i]['backedup'] = false;
$lockfile = "$file.lock";
$response['ous'][$j]['images'][$i]['locked'] = file_exists($lockfile);
}
}
// Retrieve disk information.
$total = disk_total_space($imgPath);
$free = disk_free_space($imgPath);
$response['disk']['total'] = $total;
$response['disk']['free'] = $free;
// JSON response.
jsonResponse(200, $response);
} else {
// Print error message.
$response['message'] = 'Images directory not found';
jsonResponse(404, $response);
}
$app->stop();
}
);
/**
* @brief List image data
* @note Route: /repository/image/:imagename, Method: GET
* @param no
* @return JSON object with image data.
*/
$app->get('/repository/image(/:ouname)/:imagename(/)', 'validateRepositoryApiKey',
function($ouname="/", $imagename) use ($app) {
$images = array();
$response = array();
// Search image name in repository information file.
$cfgFile = '/opt/opengnsys/etc/repoinfo.json';
$json = json_decode(@file_get_contents($cfgFile), true);
$imgPath = @$json['directory'];
if (empty($ouname) or $ouname == "/") {
// Search in global directory.
$images = @$json['images'];
} else {
// Search in OU directory.
for ($i=0; $i<sizeof(@$json['ous']); $i++) {
if ($json['ous'][$i]['subdir'] == $ouname) {
$images = $json['ous'][$i]['images'];
}
}
}
// Search image.
foreach ($images as $img) {
if ($img['name'] == $imagename) {
$response = $img;
$file = "$imgPath/$ouname/" . ($img['type']==="dir" ? $img["name"] : $img["name"].".".$img["type"]);
$response['size'] = @stat($file)['size'];
$response['modified'] = date("Y-m-d H:i:s", @stat($file)['mtime']);
$response['mode'] = substr(decoct(@stat($file)['mode']), -4);
$backupfile = "$file.ant";
if (file_exists($backupfile)) {
$response['backedup'] = true;
$response['backupsize'] = @stat($backupfile)['size'];
} else {
$response['backedup'] = false;
}
$lockfile = "$file.lock";
$response['locked'] = file_exists($lockfile);
}
}
if (isset ($response)) {
// JSON response.
jsonResponse(200, $response);
} else {
// Print error message.
$response['message'] = 'Image not found';
jsonResponse(404, $response);
}
$app->stop();
}
);
/**
* @brief Power on a pc or group of pcs with the MAC specified in POST parameters
* @note Route: /poweron, Method: POST
* @param macs OU id.
* @return JSON string ok if the power on command was sent
*/
$app->post('/repository/poweron', 'validateRepositoryApiKey',
function() use($app) {
// Debe venir el parametro macs en el post (objeto JSON con array de MACs)
$data = json_decode($app->request()->getBody());
if(empty($data->macs)){
// Print error message.
$response['message'] = 'Required param macs not found';
jsonResponse(400, $response);
}
else{
$strMacs = "";
foreach($data->macs as $mac){
$strMacs .= " ".$mac;
}
// Ejecutar comando wakeonlan, debe estar disponible en el sistema operativo
if(commandExist("wakeonlan")){
$response["output"] = "Executing wakeonlan ".trim($strMacs)."\n";
$response["output"] .= shell_exec("wakeonlan ".trim($strMacs));
// Comprobar si el comando se ejecutórrectamente
jsonResponse(200, $response);
}
else{
// Print error message.
$response['message'] = 'Wakeonlan command not found in this repository';
jsonResponse(404, $response);
}
}
}
);
?>
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