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1 <?php |
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2 // $Id: xrds.inc,v 1.2 2007/10/15 09:40:42 goba Exp $ |
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3 |
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4 // Global variables to track parsing state |
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5 $xrds_open_elements = array(); |
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6 $xrds_services = array(); |
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7 $xrds_current_service = array(); |
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8 |
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9 /** |
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10 * Main entry point for parsing XRDS documents |
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11 */ |
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12 function xrds_parse($xml) { |
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13 global $xrds_services; |
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14 |
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15 $parser = xml_parser_create_ns(); |
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16 xml_set_element_handler($parser, '_xrds_element_start', '_xrds_element_end'); |
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17 xml_set_character_data_handler($parser, '_xrds_cdata'); |
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18 |
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19 xml_parse($parser, $xml); |
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20 xml_parser_free($parser); |
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21 |
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22 return $xrds_services; |
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23 } |
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24 |
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25 /** |
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26 * Parser callback functions |
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27 */ |
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28 function _xrds_element_start(&$parser, $name, $attribs) { |
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29 global $xrds_open_elements; |
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30 |
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31 $xrds_open_elements[] = _xrds_strip_namespace($name); |
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32 } |
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33 |
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34 function _xrds_element_end(&$parser, $name) { |
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35 global $xrds_open_elements, $xrds_services, $xrds_current_service; |
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36 |
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37 $name = _xrds_strip_namespace($name); |
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38 if ($name == 'SERVICE') { |
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39 if (in_array(OPENID_NS_2_0 .'/signon', $xrds_current_service['types']) || |
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40 in_array(OPENID_NS_2_0 .'/server', $xrds_current_service['types'])) { |
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41 $xrds_current_service['version'] = 2; |
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42 } |
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43 elseif (in_array(OPENID_NS_1_1, $xrds_current_service['types']) || |
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44 in_array(OPENID_NS_1_0, $xrds_current_service['types'])) { |
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45 $xrds_current_service['version'] = 1; |
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46 } |
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47 if (!empty($xrds_current_service['version'])) { |
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48 $xrds_services[] = $xrds_current_service; |
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49 } |
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50 $xrds_current_service = array(); |
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51 } |
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52 array_pop($xrds_open_elements); |
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53 } |
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54 |
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55 function _xrds_cdata(&$parser, $data) { |
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56 global $xrds_open_elements, $xrds_services, $xrds_current_service; |
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57 $path = strtoupper(implode('/', $xrds_open_elements)); |
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58 switch ($path) { |
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59 case 'XRDS/XRD/SERVICE/TYPE': |
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60 $xrds_current_service['types'][] = $data; |
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61 break; |
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62 case 'XRDS/XRD/SERVICE/URI': |
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63 $xrds_current_service['uri'] = $data; |
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64 break; |
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65 case 'XRDS/XRD/SERVICE/DELEGATE': |
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66 $xrds_current_service['delegate'] = $data; |
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67 break; |
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68 case 'XRDS/XRD/SERVICE/LOCALID': |
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69 $xrds_current_service['localid'] = $data; |
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70 break; |
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71 } |
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72 } |
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73 |
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74 function _xrds_strip_namespace($name) { |
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75 // Strip namespacing. |
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76 $pos = strrpos($name, ':'); |
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77 if ($pos !== FALSE) { |
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78 $name = substr($name, $pos + 1, strlen($name)); |
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79 } |
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80 |
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81 return $name; |
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82 } |
