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- import makeArvadosRequest from 'make-arvados-request';
-
- function rdvHash(serviceId, locator) {
- let blockHash = /^[0-9a-f]{32}/.exec(locator);
- if (!blockHash)
- throw Error('Invalid locator');
- if (typeof(serviceId) !== 'string')
- throw Error('Invalid service ID');
- let res = CryptoJS.MD5(serviceId + blockHash).toString();
- return res;
- }
-
- function wbDownloadFile(arvHost, arvToken,
- manifestReader, path) {
-
- const file = manifestReader.getFile(path);
- const name = path.split('/').reverse()[0];
- const blockRefs = file[0];
- let services;
-
- let prom = makeArvadosRequest(arvHost, arvToken,
- '/arvados/v1/keep_services/accessible');
- prom = prom.then(xhr => (services = xhr.response['items']));
-
- const blocks = [];
- for (let i = 0; i < blockRefs.length; i++) {
- prom = prom.then(() => {
- const [ locator, position, size ] = blockRefs[i];
- const weights = services.map(s => rdvHash(s['uuid'], locator));
- const order = Object.keys(services).sort((a, b) => weights[b].localeCompare(weights[a]));
- const orderedServices = order.map(i => services[i]);
-
- let k = 0;
- const cb = () => {
- if (k >= orderedServices.length)
- throw Error('Block not found');
-
- const svc = orderedServices[k];
- k++;
-
- let prom_1 = makeArvadosRequest(svc.service_host +
- ':' + svc.service_port, arvToken,
- '/' + locator, { 'useSsl': svc.service_ssl_flag,
- 'responseType': 'arraybuffer' });
- //prom_1 = prom_1.then(xhr => xhr.response);
- prom_1 = prom_1.catch(cb);
-
- return prom_1;
- };
-
- return cb().then(xhr => (blocks.append(xhr.response.slice(position, size))));
- });
- }
-
- prom = prom.then(() => {
- const blob = new Blob(blocks);
- const url = window.URL.createObjectURL(blob);
- const a = document.createElement('a');
- a.href = url;
- a.download = name;
-
- });
- }
-
- export default wbDownloadFile;
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