47 lines
1.7 KiB
JavaScript
47 lines
1.7 KiB
JavaScript
const logger = require("jitsi-meet-logger").getLogger(__filename);
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var JSSHA = require('jssha');
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module.exports = {
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/**
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* Looks for a list of possible BOSH addresses in 'config.boshList' and
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* sets the value of 'config.bosh' based on that list and 'roomName'.
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* @param config the configuration object.
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* @param roomName the name of the room/conference.
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*/
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chooseAddress: function(config, roomName) {
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if (!roomName || !config.boshList || !Array.isArray(config.boshList) ||
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!config.boshList.length) {
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return;
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}
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// This implements the actual choice of an entry in the list based on
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// roomName. Please consider the implications for existing deployments
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// before introducing changes.
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var hash = (new JSSHA(roomName, 'TEXT')).getHash('SHA-1', 'HEX');
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var n = parseInt("0x"+hash.substr(-6));
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var idx = n % config.boshList.length;
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var attemptFirstAddress;
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config.bosh = config.boshList[idx];
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logger.log('Setting config.bosh to ' + config.bosh +
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' (idx=' + idx + ')');
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if (config.boshAttemptFirstList &&
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Array.isArray(config.boshAttemptFirstList) &&
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config.boshAttemptFirstList.length > 0) {
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idx = n % config.boshAttemptFirstList.length;
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attemptFirstAddress = config.boshAttemptFirstList[idx];
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if (attemptFirstAddress != config.bosh) {
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config.boshAttemptFirst = attemptFirstAddress;
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logger.log('Setting config.boshAttemptFirst=' +
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attemptFirstAddress + ' (idx=' + idx + ')');
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} else {
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logger.log('Not setting boshAttemptFirst, address matches.');
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}
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}
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}
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};
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