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36 lines
789 B
JavaScript
36 lines
789 B
JavaScript
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'use strict';
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var winston = require('winston');
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var ratelimit = {};
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var allowedCallsPerSecond = 20;
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ratelimit.isFlooding = function(socket) {
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socket.callsPerSecond = socket.callsPerSecond || 0;
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socket.elapsedTime = socket.elapsedTime || 0;
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socket.lastCallTime = socket.lastCallTime || Date.now();
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++socket.callsPerSecond;
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var now = Date.now();
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socket.elapsedTime += now - socket.lastCallTime;
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if (socket.callsPerSecond > allowedCallsPerSecond && socket.elapsedTime < 1000) {
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winston.warn('Flooding detected! Calls : ' + socket.callsPerSecond + ', Duration : ' + socket.elapsedTime);
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return true;
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}
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if (socket.elapsedTime >= 1000) {
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socket.elapsedTime = 0;
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socket.callsPerSecond = 0;
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}
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socket.lastCallTime = now;
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return false;
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};
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module.exports = ratelimit;
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