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Defer rate limiter creation to a hook call

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This makes it possible to change the rate limiter settings via
`/admin/settings` or by modifying the appropriate settings object and
reinvoking the hook.
This commit is contained in:
Richard Hansen 2021-02-16 20:53:42 -05:00
parent d7ed71eba0
commit 00d45e3229
3 changed files with 18 additions and 13 deletions
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3
src/ep.json
View file

@ -84,7 +84,8 @@
"name": "socketio",
"hooks": {
"expressCloseServer": "ep_etherpad-lite/node/hooks/express/socketio",
"expressCreateServer": "ep_etherpad-lite/node/hooks/express/socketio"
"expressCreateServer": "ep_etherpad-lite/node/hooks/express/socketio",
"socketio": "ep_etherpad-lite/node/handler/PadMessageHandler"
}
},
{

12
src/node/handler/PadMessageHandler.js
View file

@ -40,10 +40,14 @@ const nodeify = require('nodeify');
const {RateLimiterMemory} = require('rate-limiter-flexible');
const webaccess = require('../hooks/express/webaccess');
const rateLimiter = new RateLimiterMemory({
points: settings.commitRateLimiting.points,
duration: settings.commitRateLimiting.duration,
});
let rateLimiter;
exports.socketio = () => {
// The rate limiter is created in this hook so that restarting the server resets the limiter. The
// settings.commitRateLimiting object is passed directly to the rate limiter so that the limits
// can be dynamically changed during runtime by modifying its properties.
rateLimiter = new RateLimiterMemory(settings.commitRateLimiting);
};
/**
* A associative array that saves information about a session

16
src/node/hooks/express/importexport.js
View file

@ -10,15 +10,15 @@ const rateLimit = require('express-rate-limit');
const securityManager = require('../../db/SecurityManager');
const webaccess = require('./webaccess');
settings.importExportRateLimiting.onLimitReached = (req, res, options) => {
// when the rate limiter triggers, write a warning in the logs
console.warn('Import/Export rate limiter triggered on ' +
`"${req.originalUrl}" for IP address ${req.ip}`);
};
const limiter = rateLimit(settings.importExportRateLimiting);
exports.expressCreateServer = (hookName, args, cb) => {
settings.importExportRateLimiting.onLimitReached = (req, res, options) => {
// when the rate limiter triggers, write a warning in the logs
console.warn('Import/Export rate limiter triggered on ' +
`"${req.originalUrl}" for IP address ${req.ip}`);
};
// The rate limiter is created in this hook so that restarting the server resets the limiter.
const limiter = rateLimit(settings.importExportRateLimiting);
// handle export requests
args.app.use('/p/:pad/:rev?/export/:type', limiter);
args.app.get('/p/:pad/:rev?/export/:type', (req, res, next) => {