A search interface for data from the Politics of Patents case study (part of Copim WP6): this parses data from the archive of RTF files and provides additional data from the European Patent Office API. https://patents.copim.ac.uk
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  1. <?php
  2. # @name: ops_api.php
  3. # @version: 0.1
  4. # @creation_date: 2021-09-24
  5. # @license: The MIT License <https://opensource.org/licenses/MIT>
  6. # @author: Simon Bowie <ad7588@coventry.ac.uk>
  7. # @purpose: Performs functions against the European Patent Office's Open Patent Services (OPS) API
  8. # @acknowledgements:
  9. # OPS documented at https://www.epo.org/searching-for-patents/data/web-services/ops.html
  10. # OPS RESTful API specification at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf
  11. # OPS API functions list at https://developers.epo.org/ops-v3-2/apis
  12. function get_access_token() {
  13. // OPS API credentials (details at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf)
  14. $ops_url = $_ENV["OPS_URL"] . '3.2/auth/accesstoken';
  15. $auth = base64_encode($_ENV["CONSUMER_KEY"] . ":" . $_ENV["CONSUMER_SECRET"]);
  16. // Set up API call
  17. $ch = curl_init();
  18. curl_setopt($ch, CURLOPT_URL, $ops_url);
  19. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  20. curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Basic $auth","Content-Type: application/x-www-form-urlencoded"));
  21. curl_setopt($ch, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
  22. curl_setopt($ch, CURLOPT_POST, true);
  23. // Give back curl result
  24. $response = curl_exec($ch);
  25. curl_close($ch);
  26. // Turn the API response into useful Json
  27. $json = json_decode($response);
  28. $access_token = $json->access_token;
  29. return $access_token;
  30. }
  31. function get_publication_details($document_reference) {
  32. $access_token = get_access_token();
  33. // OPS API credentials (details at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf)
  34. $ops_url = $_ENV["OPS_URL"] . 'rest-services/published-data/publication/epodoc/' . $document_reference . '/biblio';
  35. // Set up API call
  36. $ch = curl_init();
  37. curl_setopt($ch, CURLOPT_URL, $ops_url);
  38. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  39. curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Bearer $access_token"));
  40. // Give back curl result
  41. $response = curl_exec($ch);
  42. curl_close($ch);
  43. if (strpos($response,"No results found") === false ) {
  44. $xml = new SimpleXMLElement($response);
  45. print_r($response);
  46. //var_dump($xml->{'exchange-documents'}->{'exchange-document'}->{'bibliographic-data'}->{'invention-title'}['lang']);
  47. //print_r($xml->xpath('//*'));
  48. //print_r($xml);
  49. }
  50. }
  51. function check_for_images($document_reference) {
  52. $access_token = get_access_token();
  53. // OPS API credentials (details at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf)
  54. $ops_url = $_ENV["OPS_URL"] . 'rest-services/published-data/publication/epodoc/' . $document_reference . '/images';
  55. // Set up API call
  56. $ch = curl_init();
  57. curl_setopt($ch, CURLOPT_URL, $ops_url);
  58. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  59. curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Bearer $access_token"));
  60. // Give back curl result
  61. $response = curl_exec($ch);
  62. curl_close($ch);
  63. if (strpos($response,"No results found") === false ) {
  64. return $response;
  65. }
  66. }
  67. function get_images($document_reference){
  68. $access_token = get_access_token();
  69. // OPS API credentials (details at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf)
  70. $ops_url = $_ENV["OPS_URL"] . 'rest-services/published-data/publication/epodoc/' . $document_reference . '/images';
  71. // Set up API call
  72. $ch = curl_init();
  73. curl_setopt($ch, CURLOPT_URL, $ops_url);
  74. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  75. curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Bearer $access_token"));
  76. // Give back curl result
  77. $response = curl_exec($ch);
  78. curl_close($ch);
  79. if (strpos($response,"No results found") === false ) {
  80. // Turn the API response into useful XML
  81. $xml = new SimpleXMLElement($response);
  82. // Retrieve image path from that XML
  83. $drawings_url = $_ENV["OPS_URL_IMAGES"] . '3.2/rest-services/' . $xml->xpath("///ops:document-instance[@desc='Drawing']/@link")[0][0]->__toString() . '?Range=1';
  84. // Set up API call
  85. $ch = curl_init();
  86. curl_setopt($ch, CURLOPT_URL, $drawings_url);
  87. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  88. curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Bearer $access_token","Accept: application/pdf"));
  89. // Give back curl result
  90. $response = curl_exec($ch);
  91. curl_close($ch);
  92. // Return the PDF response
  93. return $response;
  94. }
  95. }
  96. ?>