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wb-image-viewer-page.js 3.0KB

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  1. import { h, Component } from 'preact';
  2. import makeArvadosRequest from 'make-arvados-request';
  3. function downloadFile(arvHost, arvToken, file) {
  4. const blockRefs = file[0];
  5. let prom = makeArvadosRequest(arvHost, arvToken,
  6. '/arvados/v1/keep_services');
  7. let proxy;
  8. prom = prom.then(xhr => {
  9. const services = xhr.response['items'];
  10. const proxies = services.filter(svc => (svc.service_type === 'proxy'));
  11. const n = Math.floor(Math.random() * proxies.length);
  12. proxy = proxies[n];
  13. });
  14. const blocks = [];
  15. for (let i = 0; i < blockRefs.length; i++) {
  16. let locator, start, end;
  17. prom = prom.then(() => {
  18. [ locator, start, end ] = blockRefs[i];
  19. return makeArvadosRequest(
  20. proxy.service_host + ':' + proxy.service_port,
  21. arvToken, '/' + locator,
  22. { 'useSsl': proxy.service_ssl_flag,
  23. 'responseType': 'arraybuffer' }
  24. );
  25. });
  26. prom = prom.then(xhr => blocks.push(xhr.response.slice(start, end)));
  27. }
  28. prom = prom.then(() => {
  29. const url = URL.createObjectURL(new Blob(blocks));
  30. const totalSize = blocks.reduce((a, b) => a.length + b.length);
  31. const big = new Uint8Array(totalSize);
  32. for (let i = 0, pos = 0; i < blocks.length; i++) {
  33. big.set(blocks[i], pos);
  34. pos += blocks[i].length;
  35. }
  36. // papayaContainers[0].startPapaya();
  37. const poll = () => {
  38. setTimeout(() => {
  39. console.log('Polling Papaya startup...')
  40. if (true) { // window.papayaContainers && window.papayaContainers[0]) {
  41. console.log('Great, Papaya started!');
  42. papaya.Container.startPapaya();
  43. //papaya.Container.addImage(0, big.buffer);
  44. document.body.id = "bod";
  45. document.body.style.background = "#555";
  46. papaya.Container.addViewer("bod", {
  47. 'binaryImages': [ big.buffer ],
  48. 'noNewFiles': true,
  49. });
  50. } else
  51. poll();
  52. }, 1000);
  53. };
  54. //setTimeout(poll, 10000);
  55. poll();
  56. });
  57. }
  58. class WBImageViewerPage extends Component {
  59. componentDidMount() {
  60. const { blobUrl, app } = this.props;
  61. const { arvHost, arvToken } = app.state;
  62. let prom = new Promise((accept, reject) => {
  63. const xhr = new XMLHttpRequest();
  64. xhr.open('GET', blobUrl);
  65. xhr.onreadystatechange = () => {
  66. if (xhr.readyState !== 4) return;
  67. if (xhr.status !== 200) reject(xhr);
  68. else accept(xhr);
  69. };
  70. xhr.responseType = 'blob';
  71. xhr.send();
  72. });
  73. prom = prom.then(xhr => xhr.response.text());
  74. prom = prom.then(data => {
  75. data = JSON.parse(data);
  76. downloadFile(arvHost, arvToken, data.file);
  77. });
  78. }
  79. render() {
  80. return (
  81. <div>
  82. <script language="javascript" src="/js/papaya.js"></script>
  83. <div id="papaya" style="width: auto; height: 100%; margin: 0;"></div>
  84. </div>
  85. );
  86. }
  87. }
  88. export default WBImageViewerPage;