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/s3db3.5.10/pearlib/arc/store/ARC2_StoreEndpoint.php

https://github.com/drobbins/s3db
PHP | 716 lines | 610 code | 60 blank | 46 comment | 65 complexity | 1677ecffa24ba139585afa24d2e1d4d5 MD5 | raw file
    

  1. <?php

    2. 

  2. /*

    3. 

  3. homepage: http://arc.semsol.org/

    4. 

  4. license:  http://arc.semsol.org/license

    5. 

  5. 

    6. 

  6. class:    ARC2 SPARQL Endpoint

    7. 

  7. author:   Benjamin Nowack

    8. 

  8. version:  2008-07-02 (Addition: SPOG export via dump method or DUMP query)

    9. 

  9. */

    10. 

  10. 

    11. 

  11. ARC2::inc('Store');

    12. 

  12. 

    13. 

  13. class ARC2_StoreEndpoint extends ARC2_Store {

    14. 

  14. 

    15. 

  15.   function __construct($a = '', &$caller) {

    16. 

  16.     parent::__construct($a, $caller);

    17. 

  17.   }

    18. 

  18.   

    19. 

  19.   function ARC2_StoreEndpoint($a = '', &$caller) {

    20. 

  20.     $this->__construct($a, $caller);

    21. 

  21.   }

    22. 

  22. 

    23. 

  23.   function __init() {

    24. 

  24.     parent::__init();

    25. 

  25.     $this->headers = array('http' => 'HTTP/1.1 200 OK');

    26. 

  26.     $this->read_key = $this->v('endpoint_read_key', '', $this->a);

    27. 

  27.     $this->write_key = $this->v('endpoint_write_key', '', $this->a);

    28. 

  28.     $this->a['store_allow_extension_functions'] = $this->v('store_allow_extension_functions', 0, $this->a);    

    29. 

  29.     $this->result = '';

    30. 

  30.   }

    31. 

  31. 

    32. 

  32.   /*  */

    33. 

  33.   

    34. 

  34.   function getQueryString($mthd = '') {

    35. 

  35.     $r = '';

    36. 

  36.     if (!$mthd || ($mthd == 'post')) {

    37. 

  37.       $r = @file_get_contents('php://input');

    38. 

  38.     }

    39. 

  39.     $r = !$r ?$this->v1('QUERY_STRING', '', $_SERVER) : $r;

    40. 

  40.     return $r;

    41. 

  41.   }

    42. 

  42. 

    43. 

  43.   function p($name='', $mthd = '', $multi = '', $default = '') {

    44. 

  44.     $mthd = strtolower($mthd);

    45. 

  45.     if($multi){

    46. 

  46.       $qs = $this->getQueryString($mthd);

    47. 

  47.       if (preg_match_all('/\&' . $name . '=([^\&]*)/', $qs, $m)){

    48. 

  48.         foreach ($m[1] as $i => $val) {

    49. 

  49.           $m[1][$i] = stripslashes($val);

    50. 

  50.         }

    51. 

  51.         return $m[1];

    52. 

  52.       }

    53. 

  53.       return $default ? $default : array();

    54. 

  54.     }

    55. 

  55.     $args = array_merge($_GET, $_POST);

    56. 

  56.     $r = isset($args[$name]) ? $args[$name] : $default;

    57. 

  57.     return is_array($r) ? $r : stripslashes($r);

    58. 

  58.   }

    59. 

  59.   

    60. 

  60.   /*  */

    61. 

  61. 

    62. 

  62.   function getFeatures() {

    63. 

  63.     return $this->v1('endpoint_features', array(), $this->a);

    64. 

  64.   }

    65. 

  65. 

    66. 

  66.   function setHeader($k, $v) {

    67. 

  67.     $this->headers[$k] = $v;

    68. 

  68.   }

    69. 

  69.   

    70. 

  70.   function sendHeaders() {

    71. 

  71.     $this->setHeader('content-length', 'Content-Length: ' . strlen($this->getResult()));

    72. 

  72.     foreach ($this->headers as $k => $v) {

    73. 

  73.       header($v);

    74. 

  74.     }

    75. 

  75.   }

    76. 

  76.   

    77. 

  77.   function getResult() {

    78. 

  78.     return $this->result;

    79. 

  79.   }

    80. 

  80.   

    81. 

  81.   /*  */

    82. 

  82.   

    83. 

  83.   function handleRequest($auto_setup = 0) {

    84. 

  84.     if (!$this->isSetUp()) {

    85. 

  85.       if ($auto_setup) {

    86. 

  86.         $this->setUp();

    87. 

  87.         return $this->handleRequest();

    88. 

  88.       }

    89. 

  89.       else {

    90. 

  90.         $this->setHeader('http', 'HTTP/1.1 400 Bad Request');

    91. 

  91.         $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    92. 

  92.         $this->result = 'Missing configuration or the endpoint store was not set up yet.';

    93. 

  93.       }

    94. 

  94.     }

    95. 

  95.     elseif ($img = $this->p('img')) {

    96. 

  96.       $this->handleImgRequest($img);

    97. 

  97.     }

    98. 

  98.     elseif ($q = $this->p('query')) {

    99. 

  99.       $this->checkProcesses();

    100. 

  100.       $this->handleQueryRequest($q);

    101. 

  101.     }

    102. 

  102.     else {

    103. 

  103.       $this->handleEmptyRequest();

    104. 

  104.     }

    105. 

  105.   }

    106. 

  106.   

    107. 

  107.   function go($auto_setup = 0) {

    108. 

  108.     $this->handleRequest($auto_setup);

    109. 

  109.     $this->sendHeaders();

    110. 

  110.     echo $this->getResult();

    111. 

  111.   }

    112. 

  112.   

    113. 

  113.   /*  */

    114. 

  114.   

    115. 

  115.   function handleImgRequest($img) {

    116. 

  116.     $this->setHeader('content-type', 'Content-type: image/gif');

    117. 

  117.     $imgs = array(

    118. 

  118.       'bg_body' => base64_decode('R0lGODlhAQBkAMQAAPf39/Hx8erq6vPz8/Ly8u/v7+np6fT09Ovr6/b29u3t7ejo6Pz8/Pv7+/39/fr6+vj4+P7+/vn5+f///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAAAAAAALAAAAAABAGQAAAUp4GIIiFIExHAkAAC9cAxJdG3TT67vTe//jKBQ6Cgaj5GkcpmcOJ/QZwgAOw=='),

    119. 

  119.     );

    120. 

  120.     $this->result = isset($imgs[$img]) ? $imgs[$img] : '';

    121. 

  121.   }

    122. 

  122.   

    123. 

  123.   /*  */

    124. 

  124.   

    125. 

  125.   function handleEmptyRequest() {

    126. 

  126.     $this->setHeader('content-type', 'Content-type: text/html; charset=utf-8');

    127. 

  127.     $this->result = $this->getHTMLFormDoc();

    128. 

  128.   }

    129. 

  129. 

    130. 

  130.   /*  */

    131. 

  131.   

    132. 

  132.   function checkProcesses() {

    133. 

  133.     

    134. 

  134.   }

    135. 

  135.   

    136. 

  136.   /*  */

    137. 

  137. 

    138. 

  138.   function handleQueryRequest($q) {

    139. 

  139.     if (preg_match('/^dump/i', $q)) {

    140. 

  140.       $infos = array('query' => array('type' => 'dump'));

    141. 

  141.     }

    142. 

  142.     else {

    143. 

  143.       ARC2::inc('SPARQLPlusParser');

    144. 

  144.       $p = & new ARC2_SPARQLPlusParser($this->a, $this);

    145. 

  145.       $p->parse($q);

    146. 

  146.       $infos = $p->getQueryInfos();

    147. 

  147.     }

    148. 

  148.     /* errors? */

    149. 

  149.     if ($errors = $this->getErrors()) {

    150. 

  150.       $this->setHeader('http', 'HTTP/1.1 400 Bad Request');

    151. 

  151.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    152. 

  152.       $this->result = join("\n", $errors);

    153. 

  153.       return true;

    154. 

  154.     }

    155. 

  155.     $qt = $infos['query']['type'];

    156. 

  156.     /* wrong read key? */

    157. 

  157.     if ($this->read_key && ($this->p('key') != $this->read_key) && preg_match('/^(select|ask|construct|describe|dump)$/', $qt)) {

    158. 

  158.       $this->setHeader('http', 'HTTP/1.1 401 Access denied');

    159. 

  159.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    160. 

  160.       $this->result = 'Access denied. Missing or wrong "key" parameter.';

    161. 

  161.       return true;

    162. 

  162.     }

    163. 

  163.     /* wrong write key? */

    164. 

  164.     if ($this->write_key && ($this->p('key') != $this->write_key) && preg_match('/^(load|insert|delete|update)$/', $qt)) {

    165. 

  165.       $this->setHeader('http', 'HTTP/1.1 401 Access denied');

    166. 

  166.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    167. 

  167.       $this->result = 'Access denied. Missing or wrong "key" parameter.';

    168. 

  168.       return true;

    169. 

  169.     }

    170. 

  170.     /* non-allowed query type? */

    171. 

  171.     if (!in_array($qt, $this->getFeatures())) {

    172. 

  172.       $this->setHeader('http', 'HTTP/1.1 401 Access denied');

    173. 

  173.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    174. 

  174.       $this->result = 'Access denied for "' .$qt. '" query';

    175. 

  175.       return true;

    176. 

  176.     }

    177. 

  177.     /* load/insert/delete via GET */

    178. 

  178.     if (in_array($qt, array('load', 'insert', 'delete')) && isset($_GET['query'])) {

    179. 

  179.       $this->setHeader('http', 'HTTP/1.1 501 Not Implemented');

    180. 

  180.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    181. 

  181.       $this->result = 'Query type "' .$qt. '" not supported via GET';

    182. 

  182.       return true;

    183. 

  183.     }

    184. 

  184.     /* unsupported query type */

    185. 

  185.     if (!in_array($qt, array('select', 'ask', 'describe', 'construct', 'load', 'insert', 'delete', 'dump'))) {

    186. 

  186.       $this->setHeader('http', 'HTTP/1.1 501 Not Implemented');

    187. 

  187.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    188. 

  188.       $this->result = 'Unsupported query type "' .$qt. '"';

    189. 

  189.       return true;

    190. 

  190.     }

    191. 

  191.     /* adjust infos */

    192. 

  192.     $infos = $this->adjustQueryInfos($infos);

    193. 

  193.     $t1 = ARC2::mtime();

    194. 

  194.     $r = array('result' => $this->runQuery($infos, $qt));

    195. 

  195.     $t2 = ARC2::mtime();

    196. 

  196.     $r['query_time'] = $t2 - $t1;

    197. 

  197.     /* query errors? */

    198. 

  198.     if ($errors = $this->getErrors()) {

    199. 

  199.       $this->setHeader('http', 'HTTP/1.1 400 Bad Request');

    200. 

  200.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    201. 

  201.       $this->result = 'Error: ' . join("\n", $errors);

    202. 

  202.       return true;

    203. 

  203.     }

    204. 

  204.     /* result */

    205. 

  205.     $m = 'get' . ucfirst($qt) . 'ResultDoc';

    206. 

  206.     if (method_exists($this, $m)) {

    207. 

  207.       $this->result = $this->$m($r);

    208. 

  208.     }

    209. 

  209.     else {

    210. 

  210.       $this->setHeader('content-type', 'Content-type: text/plain; charset=utf-8');

    211. 

  211.       $this->result = 'Result serializer not available, dumping raw data:' . "\n" . print_r($r, 1);

    212. 

  212.     }

    213. 

  213.   }

    214. 

  214.   

    215. 

  215.   /*  */

    216. 

  216. 

    217. 

  217.   function adjustQueryInfos($infos) {

    218. 

  218.     /* limit */

    219. 

  219.     if ($max_l = $this->v('endpoint_max_limit', 0, $this->a)) {

    220. 

  220.       if ($this->v('limit', $max_l + 1, $infos['query']) > $max_l) {

    221. 

  221.         $infos['query']['limit'] = $max_l;

    222. 

  222.       }

    223. 

  223.     }

    224. 

  224.     /* default-graph-uri / named-graph-uri */

    225. 

  225.     $dgs = $this->p('default-graph-uri', '', 1);

    226. 

  226.     $ngs = $this->p('named-graph-uri', '', 1);

    227. 

  227.     if (count(array_merge($dgs, $ngs))) {

    228. 

  228.       $ds = array();

    229. 

  229.       foreach ($dgs as $g) {

    230. 

  230.         $ds[] = array('graph' => $this->calcURI($g), 'named' => 0);

    231. 

  231.       }

    232. 

  232.       foreach ($ngs as $g) {

    233. 

  233.         $ds[] = array('graph' => $this->calcURI($g), 'named' => 1);

    234. 

  234.       }

    235. 

  235.       $infos['query']['dataset'] = $ds;

    236. 

  236.     }

    237. 

  237.     /* sql result format */

    238. 

  238.     if (($this->p('format') == 'sql') || ($this->p('output') == 'sql')) {

    239. 

  239.       $infos['result_format'] = 'sql';

    240. 

  240.     }

    241. 

  241.     return $infos;

    242. 

  242.   }

    243. 

  243.   

    244. 

  244.   /*  */

    245. 

  245. 

    246. 

  246.   function getResultFormat($formats, $default) {

    247. 

  247.     $prefs = array();

    248. 

  248.     /* arg */

    249. 

  249.     if (($v = $this->p('format')) || ($v = $this->p('output'))) {

    250. 

  250.       $prefs[] = $v;

    251. 

  251.     }

    252. 

  252.     /* accept header */

    253. 

  253.     if ($vals = explode(',', $_SERVER['HTTP_ACCEPT'])) {

    254. 

  254.       $o_vals = array();

    255. 

  255.       foreach ($vals as $val) {

    256. 

  256.         if (preg_match('/(rdf\+n3|x\-turtle|rdf\+xml|sparql\-results\+xml|sparql\-results\+json|json)/', $val, $m)) {

    257. 

  257.           $o_vals[$m[1]] = 1;

    258. 

  258.           if (preg_match('/\;q\=([0-9\.]+)/', $val, $sub_m)) {

    259. 

  259.             $o_vals[$m[1]] = 1 * $sub_m[1];

    260. 

  260.           }

    261. 

  261.         }

    262. 

  262.       }

    263. 

  263.       arsort($o_vals);

    264. 

  264.       foreach ($o_vals as $val => $prio) {

    265. 

  265.         $prefs[] = $val;

    266. 

  266.       }

    267. 

  267.     }

    268. 

  268.     /* default */

    269. 

  269.     $prefs[] = $default;

    270. 

  270.     foreach ($prefs as $pref) {

    271. 

  271.       if (isset($formats[$pref])) {

    272. 

  272.         return $formats[$pref];

    273. 

  273.       }

    274. 

  274.     }

    275. 

  275.   }

    276. 

  276. 

    277. 

  277.   /*  */

    278. 

  278. 

    279. 

  279.   function getSelectResultDoc($r) {

    280. 

  280.     $formats = array(

    281. 

  281.       'xml' => 'SPARQLXML', 'sparql-results+xml' => 'SPARQLXML', 

    282. 

  282.       'json' => 'SPARQLJSON', 'sparql-results+json' => 'SPARQLJSON',

    283. 

  283.       'php_ser' => 'PHPSER', 'sql' => 'xxSQL', 'plain' => 'Plain', 'htmltab' => 'HTMLTable',

    284. 

  284.     );

    285. 

  285.     if ($f = $this->getResultFormat($formats, 'xml')) {

    286. 

  286.       $m = 'get' . $f . 'SelectResultDoc';

    287. 

  287.       return method_exists($this, $m) ? $this->$m($r) : 'not implemented';

    288. 

  288.     }

    289. 

  289.     return '';

    290. 

  290.   }

    291. 

  291.   

    292. 

  292.   function getSPARQLXMLSelectResultDoc($r) {

    293. 

  293.     $this->setHeader('content-type', 'Content-Type: application/sparql-results+xml');

    294. 

  294.     $vars = $r['result']['variables'];

    295. 

  295.     $rows = $r['result']['rows'];

    296. 

  296.     $dur = $r['query_time'];

    297. 

  297.     $nl = "\n";

    298. 

  298.     /* doc */

    299. 

  299.     $r = '' .

    300. 

  300.       '<?xml version="1.0"?>' . 

    301. 

  301.       $nl . '<sparql xmlns="http://www.w3.org/2005/sparql-results#">' .

    302. 

  302.     '';

    303. 

  303.     /* head */

    304. 

  304.     $r .= $nl . '  <head>';

    305. 

  305.     $r .= $nl . '    <!-- query time: '. round($dur, 4) .' sec -->';

    306. 

  306.     if (is_array($vars)) {

    307. 

  307.       foreach ($vars as $var) {

    308. 

  308.         $r .= $nl . '    <variable name="' .$var. '"/>';

    309. 

  309.       }

    310. 

  310.     }

    311. 

  311.     $r .= $nl . '  </head>';

    312. 

  312.     /* results */

    313. 

  313.     $r .= $nl . '  <results>';

    314. 

  314.     if (is_array($rows)) {

    315. 

  315.       foreach ($rows as $row) {

    316. 

  316.         $r .= $nl . '    <result>';

    317. 

  317.         foreach ($vars as $var) {

    318. 

  318.           if (isset($row[$var])) {

    319. 

  319.             $r .= $nl . '      <binding name="' .$var. '">';

    320. 

  320.             if ($row[$var . ' type'] == 'uri') {

    321. 

  321.               $r .= $nl . '        <uri>' .htmlspecialchars($row[$var]). '</uri>';

    322. 

  322.             }

    323. 

  323.             elseif ($row[$var . ' type'] == 'bnode') {

    324. 

  324.               $r .= $nl . '        <bnode>' .substr($row[$var], 2). '</bnode>';

    325. 

  325.             }

    326. 

  326.             else {

    327. 

  327.               $dt = isset($row[$var . ' datatype']) ? ' datatype="' .htmlspecialchars($row[$var . ' datatype']). '"' : '';

    328. 

  328.               $lang = isset($row[$var . ' lang']) ? ' xml:lang="' .htmlspecialchars($row[$var . ' lang']). '"' : '';

    329. 

  329.               $r .= $nl . '        <literal' . $dt . $lang . '>' .htmlspecialchars($row[$var]). '</literal>';

    330. 

  330.             }

    331. 

  331.             $r .= $nl . '      </binding>';

    332. 

  332.           }

    333. 

  333.         }

    334. 

  334.         $r .= $nl . '    </result>';

    335. 

  335.       }

    336. 

  336.     }

    337. 

  337.     $r .= $nl . '  </results>';

    338. 

  338.     /* /doc */

    339. 

  339.     $r .= $nl . '</sparql>';

    340. 

  340.     return $r;

    341. 

  341.   }

    342. 

  342.   

    343. 

  343.   function getSPARQLJSONSelectResultDoc($r) {

    344. 

  344.     $this->setHeader('content-type', 'Content-Type: application/sparql-results+json');

    345. 

  345.     $vars = $r['result']['variables'];

    346. 

  346.     $rows = $r['result']['rows'];

    347. 

  347.     $dur = $r['query_time'];

    348. 

  348.     $nl = "\n";

    349. 

  349.     /* doc */

    350. 

  350.     $r = '{';

    351. 

  351.     /* head */

    352. 

  352.     $r .= $nl . '  "head": {';

    353. 

  353.     $r .= $nl . '    "vars": [';

    354. 

  354.     $first_var = 1;

    355. 

  355.     foreach ($vars as $var) {

    356. 

  356.       $r .= $first_var ? $nl : ',' . $nl;

    357. 

  357.       $r .= '      "' .$var. '"';

    358. 

  358.       $first_var = 0;

    359. 

  359.     }

    360. 

  360.     $r .= $nl . '    ]';

    361. 

  361.     $r .= $nl . '  },';

    362. 

  362.     /* results */

    363. 

  363.     $r .= $nl . '  "results": {';

    364. 

  364.     $r .= $nl . '    "bindings": [';

    365. 

  365.     $first_row = 1;

    366. 

  366.     foreach ($rows as $row) {

    367. 

  367.       $r .= $first_row ? $nl : ',' . $nl;

    368. 

  368.       $r .= '      {';

    369. 

  369.       $first_var = 1;

    370. 

  370.       foreach ($vars as $var) {

    371. 

  371.         if (isset($row[$var])) {

    372. 

  372.           $r .= $first_var ? $nl : ',' . $nl . $nl;

    373. 

  373.           $r .= '        "' .$var. '": {';

    374. 

  374.           if ($row[$var . ' type'] == 'uri') {

    375. 

  375.             $r .= $nl . '          "type": "uri",';

    376. 

  376.             $r .= $nl . '          "value": "' .mysql_real_escape_string($row[$var]). '"';

    377. 

  377.           }

    378. 

  378.           elseif ($row[$var . ' type'] == 'bnode') {

    379. 

  379.             $r .= $nl . '          "type": "bnode",';

    380. 

  380.             $r .= $nl . '          "value": "' . substr($row[$var], 2) . '"';

    381. 

  381.           }

    382. 

  382.           else {

    383. 

  383.             $dt = isset($row[$var . ' datatype']) ? ',' . $nl .'          "datatype": "' .mysql_real_escape_string($row[$var . ' datatype']). '"' : '';

    384. 

  384.             $lang = isset($row[$var . ' lang']) ? ',' . $nl .'          "xml:lang": "' .mysql_real_escape_string($row[$var . ' lang']). '"' : '';

    385. 

  385.             $type = $dt ? 'typed-literal' : 'literal';

    386. 

  386.             $r .= $nl . '          "type": "' . $type . '",';

    387. 

  387.             $r .= $nl . '          "value": "' . $this->jsonEscape($row[$var]) . '"';

    388. 

  388.             $r .= $dt . $lang;

    389. 

  389.           }

    390. 

  390.           $r .= $nl . '        }';

    391. 

  391.           $first_var = 0;

    392. 

  392.         }

    393. 

  393.       }

    394. 

  394.       $r .= $nl . '      }';

    395. 

  395.       $first_row = 0;

    396. 

  396.     }

    397. 

  397.     $r .= $nl . '    ]';

    398. 

  398.     $r .= $nl . '  }';

    399. 

  399.     /* /doc */

    400. 

  400.     $r .= $nl . '}';

    401. 

  401.     if (($v = $this->p('jsonp')) || ($v = $this->p('callback'))) {

    402. 

  402.       $r = $v . '(' . $r . ')';

    403. 

  403.     }

    404. 

  404.     return $r;

    405. 

  405.   }

    406. 

  406.   

    407. 

  407.   function getPHPSERSelectResultDoc($r) {

    408. 

  408.     $this->setHeader('content-type', 'Content-Type: text/plain');

    409. 

  409.     return serialize($r);

    410. 

  410.   }

    411. 

  411. 

    412. 

  412.   function getSQLSelectResultDoc($r) {

    413. 

  413.     $this->setHeader('content-type', 'Content-Type: text/plain');

    414. 

  414.     return $r['result'];

    415. 

  415.   }

    416. 

  416. 

    417. 

  417.   function getPlainSelectResultDoc($r) {

    418. 

  418.     $this->setHeader('content-type', 'Content-Type: text/plain');

    419. 

  419.     return print_r($r['result'], 1);

    420. 

  420.   }

    421. 

  421. 

    422. 

  422.   function getHTMLTableSelectResultDoc($r) {

    423. 

  423.     $this->setHeader('content-type', 'Content-Type: text/html');

    424. 

  424.     $vars = $r['result']['variables'];

    425. 

  425.     $rows = $r['result']['rows'];

    426. 

  426.     $dur = $r['query_time'];

    427. 

  427.     $r = $this->getHTMLDocHead();

    428. 

  428.     $r .= '

    429. 

  429.       <body>

    430. 

  430.         <table>

    431. 

  431.           ' . $this->getHTMLTableRows($rows, $vars) . '

    432. 

  432.         </table>

    433. 

  433.       </body>

    434. 

  434.       </html>

    435. 

  435.     ';

    436. 

  436.     return $r;

    437. 

  437.   }

    438. 

  438.   

    439. 

  439.   function getHTMLTableRows($rows, $vars) {

    440. 

  440.     $r = '';

    441. 

  441.     foreach ($rows as $row) {

    442. 

  442.       $hr = '';

    443. 

  443.       $rr = '';

    444. 

  444.       foreach ($vars as $var) {

    445. 

  445.         $hr .= $r ? '' : '<th>' . htmlspecialchars($var) . '</th>';

    446. 

  446.         $rr .= '<td>' . @htmlspecialchars($row[$var]) . '</td>';

    447. 

  447.       }

    448. 

  448.       $r .= $hr ? '<tr>' . $hr . '</tr>' : '';

    449. 

  449.       $r .= '<tr>' . $rr . '</tr>';

    450. 

  450.     }

    451. 

  451.     return $r ? $r : '<em>No results found</em>';

    452. 

  452.   }

    453. 

  453. 

    454. 

  454.   /*  */

    455. 

  455.   

    456. 

  456.   function getAskResultDoc($r) {

    457. 

  457.     $formats = array(

    458. 

  458.       'xml' => 'SPARQLXML', 'sparql-results+xml' => 'SPARQLXML', 

    459. 

  459.       'json' => 'SPARQLJSON', 'sparql-results+json' => 'SPARQLJSON',

    460. 

  460.       'plain' => 'Plain',

    461. 

  461.       'php_ser' => 'PHPSER'

    462. 

  462.     );

    463. 

  463.     if ($f = $this->getResultFormat($formats, 'xml')) {

    464. 

  464.       $m = 'get' . $f . 'AskResultDoc';

    465. 

  465.       return method_exists($this, $m) ? $this->$m($r) : 'not implemented';

    466. 

  466.     }

    467. 

  467.     return '';

    468. 

  468.   }

    469. 

  469. 

    470. 

  470.   function getSPARQLXMLAskResultDoc($r) {

    471. 

  471.     $this->setHeader('content-type', 'Content-Type: application/sparql-results+xml');

    472. 

  472.     $r_val = $r['result'] ? 'true' : 'false';

    473. 

  473.     $dur = $r['query_time'];

    474. 

  474.     $nl = "\n";

    475. 

  475.     return '' .

    476. 

  476.       '<?xml version="1.0"?>' .

    477. 

  477.       $nl . '<sparql xmlns="http://www.w3.org/2005/sparql-results#">' .

    478. 

  478.       $nl . '  <head>' .

    479. 

  479.       $nl . '    <!-- query time: '. round($dur, 4) .' sec -->' .

    480. 

  480.       $nl . '  </head>' .

    481. 

  481.       $nl . '  <boolean>' .$r_val. '</boolean>' .

    482. 

  482.       $nl . '</sparql>' .

    483. 

  483.     '';

    484. 

  484.   }

    485. 

  485.   

    486. 

  486.   function getSPARQLJSONAskResultDoc($r) {

    487. 

  487.     $this->setHeader('content-type', 'Content-Type: application/sparql-results+json');

    488. 

  488.     $r_val = $r['result'] ? 'true' : 'false';

    489. 

  489.     $dur = $r['query_time'];

    490. 

  490.     $nl = "\n";

    491. 

  491.     $r = '' .

    492. 

  492.       $nl . '{' .

    493. 

  493.       $nl . '  "head": {' .

    494. 

  494.       $nl . '  },' .

    495. 

  495.       $nl . '  "boolean" : ' . $r_val . 

    496. 

  496.       $nl . '}' . 

    497. 

  497.     '';

    498. 

  498.     if (($v = $this->p('jsonp')) || ($v = $this->p('callback'))) {

    499. 

  499.       $r = $v . '(' . $r . ')';

    500. 

  500.     }

    501. 

  501.     return $r;

    502. 

  502.   }    

    503. 

  503.   

    504. 

  504.   function getPHPSERAskResultDoc($r) {

    505. 

  505.     $this->setHeader('content-type', 'Content-Type: text/plain');

    506. 

  506.     return serialize($r);

    507. 

  507.   }

    508. 

  508. 

    509. 

  509.   function getPlainAskResultDoc($r) {

    510. 

  510.     $this->setHeader('content-type', 'Content-Type: text/plain');

    511. 

  511.     return $r['result'] ? 'true' : 'false';

    512. 

  512.   }

    513. 

  513. 

    514. 

  514.   /*  */

    515. 

  515. 

    516. 

  516.   function getConstructResultDoc($r) {

    517. 

  517.     $formats = array(

    518. 

  518.       'rdfxml' => 'RDFXML', 'rdf+xml' => 'RDFXML', 

    519. 

  519.       'json' => 'RDFJSON', 'rdf+json' => 'RDFJSON',

    520. 

  520.       'turtle' => 'Turtle', 'x-turtle' => 'Turtle', 'rdf+n3' => 'Turtle',

    521. 

  521.       'php_ser' => 'PHPSER'

    522. 

  522.     );

    523. 

  523.     if ($f = $this->getResultFormat($formats, 'rdfxml')) {

    524. 

  524.       $m = 'get' . $f . 'ConstructResultDoc';

    525. 

  525.       return method_exists($this, $m) ? $this->$m($r) : 'not implemented';

    526. 

  526.     }

    527. 

  527.     return '';

    528. 

  528.   }

    529. 

  529.   

    530. 

  530.   function getRDFXMLConstructResultDoc($r) {

    531. 

  531.     $this->setHeader('content-type', 'Content-Type: application/rdf+xml');

    532. 

  532.     $index = $r['result'];

    533. 

  533.     $ser = ARC2::getRDFXMLSerializer($this->a);

    534. 

  534.     $dur = $r['query_time'];

    535. 

  535.     return $ser->getSerializedIndex($index) . "\n" . '<!-- query time: ' . $dur . ' -->';

    536. 

  536.   }

    537. 

  537.   

    538. 

  538.   function getTurtleConstructResultDoc($r) {

    539. 

  539.     $this->setHeader('content-type', 'Content-Type: application/x-turtle');

    540. 

  540.     $index = $r['result'];

    541. 

  541.     $ser = ARC2::getTurtleSerializer($this->a);

    542. 

  542.     $dur = $r['query_time'];

    543. 

  543.     return '# query time: ' . $dur . "\n" . $ser->getSerializedIndex($index);

    544. 

  544.   }

    545. 

  545.   

    546. 

  546.   function getRDFJSONConstructResultDoc($r) {

    547. 

  547.     $this->setHeader('content-type', 'Content-Type: application/json');

    548. 

  548.     $index = $r['result'];

    549. 

  549.     $ser = ARC2::getRDFJSONSerializer($this->a);

    550. 

  550.     $dur = $r['query_time'];

    551. 

  551.     $r = $ser->getSerializedIndex($index);

    552. 

  552.     if (($v = $this->p('jsonp')) || ($v = $this->p('callback'))) {

    553. 

  553.       $r = $v . '(' . $r . ')';

    554. 

  554.     }

    555. 

  555.     return $r;

    556. 

  556.   }

    557. 

  557. 

    558. 

  558.   function getPHPSERConstructResultDoc($r) {

    559. 

  559.     $this->setHeader('content-type', 'Content-Type: text/plain');

    560. 

  560.     return serialize($r);

    561. 

  561.   }

    562. 

  562.   

    563. 

  563.   /*  */

    564. 

  564.   

    565. 

  565.   function getDescribeResultDoc($r) {

    566. 

  566.     $formats = array(

    567. 

  567.       'rdfxml' => 'RDFXML', 'rdf+xml' => 'RDFXML', 

    568. 

  568.       'json' => 'RDFJSON', 'rdf+json' => 'RDFJSON',

    569. 

  569.       'turtle' => 'Turtle', 'x-turtle' => 'Turtle', 'rdf+n3' => 'Turtle',

    570. 

  570.       'php_ser' => 'PHPSER'

    571. 

  571.     );

    572. 

  572.     if ($f = $this->getResultFormat($formats, 'rdfxml')) {

    573. 

  573.       $m = 'get' . $f . 'DescribeResultDoc';

    574. 

  574.       return method_exists($this, $m) ? $this->$m($r) : 'not implemented';

    575. 

  575.     }

    576. 

  576.     return '';

    577. 

  577.   }

    578. 

  578.   

    579. 

  579.   function getRDFXMLDescribeResultDoc($r) {

    580. 

  580.     $this->setHeader('content-type', 'Content-Type: application/rdf+xml');

    581. 

  581.     $index = $r['result'];

    582. 

  582.     $ser = ARC2::getRDFXMLSerializer($this->a);

    583. 

  583.     $dur = $r['query_time'];

    584. 

  584.     return $ser->getSerializedIndex($index) . "\n" . '<!-- query time: ' . $dur . ' -->';

    585. 

  585.   }

    586. 

  586.   

    587. 

  587.   function getTurtleDescribeResultDoc($r) {

    588. 

  588.     $this->setHeader('content-type', 'Content-Type: application/x-turtle');

    589. 

  589.     $index = $r['result'];

    590. 

  590.     $ser = ARC2::getTurtleSerializer($this->a);

    591. 

  591.     $dur = $r['query_time'];

    592. 

  592.     return '# query time: ' . $dur . "\n" . $ser->getSerializedIndex($index);

    593. 

  593.   }

    594. 

  594.   

    595. 

  595.   function getRDFJSONDescribeResultDoc($r) {

    596. 

  596.     $this->setHeader('content-type', 'Content-Type: application/json');

    597. 

  597.     $index = $r['result'];

    598. 

  598.     $ser = ARC2::getRDFJSONSerializer($this->a);

    599. 

  599.     $dur = $r['query_time'];

    600. 

  600.     $r = $ser->getSerializedIndex($index);

    601. 

  601.     if (($v = $this->p('jsonp')) || ($v = $this->p('callback'))) {

    602. 

  602.       $r = $v . '(' . $r . ')';

    603. 

  603.     }

    604. 

  604.     return $r;

    605. 

  605.   }

    606. 

  606. 

    607. 

  607.   function getPHPSERDescribeResultDoc($r) {

    608. 

  608.     $this->setHeader('content-type', 'Content-Type: text/plain');

    609. 

  609.     return serialize($r);

    610. 

  610.   }

    611. 

  611.   

    612. 

  612.   /*  */

    613. 

  613.   

    614. 

  614.   function getDumpResultDoc() {

    615. 

  615.     $this->headers = array();

    616. 

  616.     return '';

    617. 

  617.   }

    618. 

  618.   

    619. 

  619.   /*  */

    620. 

  620.   

    621. 

  621.   function jsonEscape($v) {

    622. 

  622.     if (function_exists('json_encode')) return trim(json_encode($v), '"');

    623. 

  623.     $from = array("\\", "\r", "\t", "\n", '"', "\b", "\f", "/");

    624. 

  624.     $to = array('\\\\', '\r', '\t', '\n', '\"', '\b', '\f', '\/');

    625. 

  625.     return str_replace($from, $to, $v);

    626. 

  626.   }

    627. 

  627.     

    628. 

  628.   /*  */

    629. 

  629. 

    630. 

  630.   function getHTMLFormDoc() {

    631. 

  631.     $r = '' . 

    632. 

  632.         $this->getHTMLDocHead() . '

    633. 

  633.       	<body>

    634. 

  634.           <h1>ARC SPARQL+ Endpoint (v' . ARC2::getVersion() . ')</h1>

    635. 

  635.           <div class="intro">

    636. 

  636.             <p>

    637. 

  637.               This interface implements 

    638. 

  638.               <a href="http://www.w3.org/TR/rdf-sparql-query/">SPARQL</a> and

    639. 

  639.               <a href="http://arc.semsol.org/docs/v2/sparql+">SPARQL+</a> via <a href="http://www.w3.org/TR/rdf-sparql-protocol/#query-bindings-http">HTTP Bindings</a>. 

    640. 

  640.             </p>

    641. 

  641.             <p>

    642. 

  642.               Enabled operations: ' . join(', ', $this->getFeatures()) . '

    643. 

  643.             </p>

    644. 

  644.             <p>

    645. 

  645.               Max. number of results : ' . $this->v('endpoint_max_limit', '<em>unrestricted</em>', $this->a) . '

    646. 

  646.             </p>

    647. 

  647.           </div>

    648. 

  648.           <form id="sparql-form" action="" enctype="application/x-www-form-urlencoded" method="post">

    649. 

  649.             <textarea id="query" name="query" rows="20" cols="80">

    650. 

  650. SELECT ?s ?p ?o WHERE {

    651. 

  651.   ?s ?p ?o .

    652. 

  652. }

    653. 

  653. LIMIT 10

    654. 

  654.             </textarea>

    655. 

  655.             Output format (if supported by query type): 

    656. 

  656.             <select id="output" name="output">

    657. 

  657.               <option value="">default</option>

    658. 

  658.               <option value="xml">XML</option>

    659. 

  659.               <option value="json">JSON</option>

    660. 

  660.               <option value="plain">Plain</option>

    661. 

  661.               <option value="php_ser">Serialized PHP</option>

    662. 

  662.               <option value="turtle">Turtle</option>

    663. 

  663.               <option value="rdfxml">RDF/XML</option>

    664. 

  664.               <!-- <option value="sql">SQL</option> -->

    665. 

  665.               <option value="htmltab">HTML Table</option>

    666. 

  666.             </select><br /><br />

    667. 

  667.             

    668. 

  668.             jsonp/callback (for JSON results):

    669. 

  669.             <input type="text" id="jsonp" name="jsonp" /><br /><br />

    670. 

  670.             

    671. 

  671.             API key (if required):

    672. 

  672.             <input type="text" id="key" name="key" /><br /><br />

    673. 

  673.             

    674. 

  674.             Set form method: 

    675. 

  675.             <a href="javascript:;" onclick="javascript:document.getElementById(\'sparql-form\').method=\'get\'">GET</a> 

    676. 

  676.             <a href="javascript:;" onclick="javascript:document.getElementById(\'sparql-form\').method=\'post\'">POST</a> 

    677. 

  677.             <br /><br />

    678. 

  678.             

    679. 

  679.             <input type="submit" value="Send Query" />

    680. 

  680.           </form>

    681. 

  681.       	</body>

    682. 

  682.     	</html>

    683. 

  683.     ';

    684. 

  684.     return $r;

    685. 

  685.   }

    686. 

  686.   

    687. 

  687.   function getHTMLDocHead() {

    688. 

  688.     return '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    689. 

  689.       <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

    690. 

  690.       	<head>

    691. 

  691.       		<title>ARC SPARQL+ Endpoint</title>

    692. 

  692.       		<style type="text/css">

    693. 

  693.             body {

    694. 

  694.               font-size: 14px;

    695. 

  695.             	font-family: Trebuchet MS, Verdana, Geneva, sans-serif;

    696. 

  696.               background: #fff url(?img=bg_body) top center repeat-x;

    697. 

  697.               padding: 5px 20px 20px 20px;

    698. 

  698.               color: #666;

    699. 

  699.             }

    700. 

  700.             h1 { font-size: 1.6em; font-weight: normal; }

    701. 

  701.             a { color: #c00000; }

    702. 

  702.             th, td {

    703. 

  703.               border: 1px dotted #eee;

    704. 

  704.               padding: 2px 4px; 

    705. 

  705.             }

    706. 

  706.             

    707. 

  707.             #query { display: block; width: 80%; height: 300px; margin-bottom: 10px;}

    708. 

  708.             

    709. 

  709.       		</style>

    710. 

  710.       	</head>

    711. 

  711.     ';

    712. 

  712.   }

    713. 

  713.   

    714. 

  714.   /*  */

    715. 

  715.   

    716. 

  716. }

    717. 

  717.