@push.rocks/smartproxy
Version:
A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.
154 lines • 11.2 kB
JavaScript
/**
* Manages timeouts and inactivity tracking for connections
*/
export class TimeoutManager {
constructor(settings) {
this.settings = settings;
}
/**
* Ensure timeout values don't exceed Node.js max safe integer
*/
ensureSafeTimeout(timeout) {
const MAX_SAFE_TIMEOUT = 2147483647; // Maximum safe value (2^31 - 1)
return Math.min(Math.floor(timeout), MAX_SAFE_TIMEOUT);
}
/**
* Generate a slightly randomized timeout to prevent thundering herd
*/
randomizeTimeout(baseTimeout, variationPercent = 5) {
const safeBaseTimeout = this.ensureSafeTimeout(baseTimeout);
const variation = safeBaseTimeout * (variationPercent / 100);
return this.ensureSafeTimeout(safeBaseTimeout + Math.floor(Math.random() * variation * 2) - variation);
}
/**
* Update connection activity timestamp
*/
updateActivity(record) {
record.lastActivity = Date.now();
// Clear any inactivity warning
if (record.inactivityWarningIssued) {
record.inactivityWarningIssued = false;
}
}
/**
* Calculate effective inactivity timeout based on connection type
*/
getEffectiveInactivityTimeout(record) {
let effectiveTimeout = this.settings.inactivityTimeout || 14400000; // 4 hours default
// For immortal keep-alive connections, use an extremely long timeout
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
return Number.MAX_SAFE_INTEGER;
}
// For extended keep-alive connections, apply multiplier
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'extended') {
const multiplier = this.settings.keepAliveInactivityMultiplier || 6;
effectiveTimeout = effectiveTimeout * multiplier;
}
return this.ensureSafeTimeout(effectiveTimeout);
}
/**
* Calculate effective max lifetime based on connection type
*/
getEffectiveMaxLifetime(record) {
// Use domain-specific timeout if available
const baseTimeout = record.domainConfig?.connectionTimeout ||
this.settings.maxConnectionLifetime ||
86400000; // 24 hours default
// For immortal keep-alive connections, use an extremely long lifetime
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
return Number.MAX_SAFE_INTEGER;
}
// For extended keep-alive connections, use the extended lifetime setting
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'extended') {
return this.ensureSafeTimeout(this.settings.extendedKeepAliveLifetime || 7 * 24 * 60 * 60 * 1000 // 7 days default
);
}
// Apply randomization if enabled
if (this.settings.enableRandomizedTimeouts) {
return this.randomizeTimeout(baseTimeout);
}
return this.ensureSafeTimeout(baseTimeout);
}
/**
* Setup connection timeout
* @returns The cleanup timer
*/
setupConnectionTimeout(record, onTimeout) {
// Clear any existing timer
if (record.cleanupTimer) {
clearTimeout(record.cleanupTimer);
}
// Calculate effective timeout
const effectiveLifetime = this.getEffectiveMaxLifetime(record);
// Set up the timeout
const timer = setTimeout(() => {
// Call the provided callback
onTimeout(record, 'connection_timeout');
}, effectiveLifetime);
// Make sure timeout doesn't keep the process alive
if (timer.unref) {
timer.unref();
}
return timer;
}
/**
* Check for inactivity on a connection
* @returns Object with check results
*/
checkInactivity(record) {
// Skip for connections with inactivity check disabled
if (this.settings.disableInactivityCheck) {
return {
isInactive: false,
shouldWarn: false,
inactivityTime: 0,
effectiveTimeout: 0
};
}
// Skip for immortal keep-alive connections
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
return {
isInactive: false,
shouldWarn: false,
inactivityTime: 0,
effectiveTimeout: 0
};
}
const now = Date.now();
const inactivityTime = now - record.lastActivity;
const effectiveTimeout = this.getEffectiveInactivityTimeout(record);
// Check if inactive
const isInactive = inactivityTime > effectiveTimeout;
// For keep-alive connections, we should warn first
const shouldWarn = record.hasKeepAlive &&
isInactive &&
!record.inactivityWarningIssued;
return {
isInactive,
shouldWarn,
inactivityTime,
effectiveTimeout
};
}
/**
* Apply socket timeout settings
*/
applySocketTimeouts(record) {
// Skip for immortal keep-alive connections
if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
// Disable timeouts completely for immortal connections
record.incoming.setTimeout(0);
if (record.outgoing) {
record.outgoing.setTimeout(0);
}
return;
}
// Apply normal timeouts
const timeout = this.ensureSafeTimeout(this.settings.socketTimeout || 3600000); // 1 hour default
record.incoming.setTimeout(timeout);
if (record.outgoing) {
record.outgoing.setTimeout(timeout);
}
}
}
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tRQUNULENBQUM7UUFFRCx3QkFBd0I7UUFDeEIsTUFBTSxPQUFPLEdBQUcsSUFBSSxDQUFDLGlCQUFpQixDQUFDLElBQUksQ0FBQyxRQUFRLENBQUMsYUFBYSxJQUFJLE9BQU8sQ0FBQyxDQUFDLENBQUMsaUJBQWlCO1FBQ2pHLE1BQU0sQ0FBQyxRQUFRLENBQUMsVUFBVSxDQUFDLE9BQU8sQ0FBQyxDQUFDO1FBQ3BDLElBQUksTUFBTSxDQUFDLFFBQVEsRUFBRSxDQUFDO1lBQ3BCLE1BQU0sQ0FBQyxRQUFRLENBQUMsVUFBVSxDQUFDLE9BQU8sQ0FBQyxDQUFDO1FBQ3RDLENBQUM7SUFDSCxDQUFDO0NBQ0YifQ==