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Nostr-Signature: 73671ae6535309f9eae164f7a3ec403b1bc818ef811b9692fd0122d0b72c2774 573634b648634cbad10f2451776089ea21090d9407f715e83c577b4611ae6edc 0df56b009f5afb77de334225ab30cff55586ac0cf48f5ee435428201a1e72dc357a0fb5e80ef196f5bd76d6d448056d25f0feab0b1bcbe45f9af1a2a0d5453camain
13 changed files with 460 additions and 9193 deletions
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/** |
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* Shared utilities for Nostr event handling |
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* Consolidates duplicate functions used across the codebase |
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*
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* Based on NIP-01: https://github.com/nostr-protocol/nips/blob/master/01.md
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*/ |
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import type { NostrEvent } from '../types/nostr.js'; |
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/** |
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* Check if an event is a parameterized replaceable event (addressable event per NIP-01) |
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*
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* According to NIP-01: |
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* - Replaceable events (10000-19999, 0, 3): Replaceable by kind+pubkey only (no d-tag needed) |
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* - Addressable events (30000-39999): Addressable by kind+pubkey+d-tag (d-tag required) |
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*
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* This function returns true only for addressable events (30000-39999) that have a d-tag, |
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* as these are the events that require a parameter (d-tag) to be uniquely identified. |
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*
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* @param event - The Nostr event to check |
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* @returns true if the event is an addressable event (30000-39999) with a d-tag |
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*/ |
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export function isParameterizedReplaceable(event: NostrEvent): boolean { |
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// Addressable events (30000-39999) require a d-tag to be addressable
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// Per NIP-01: "for kind n such that 30000 <= n < 40000, events are addressable
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// by their kind, pubkey and d tag value"
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if (event.kind >= 30000 && event.kind < 40000) { |
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const hasDTag = event.tags.some(t => t[0] === 'd' && t[1]); |
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return hasDTag; |
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} |
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// Replaceable events (10000-19999, 0, 3) are NOT parameterized replaceable
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// They are replaceable by kind+pubkey only, without needing a d-tag
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return false; |
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} |
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@@ -0,0 +1,147 @@
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/** |
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* Aggressive process cleanup utilities to prevent zombie processes |
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* Implements process group killing and explicit reaping |
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*/ |
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import { spawn, type ChildProcess } from 'child_process'; |
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import logger from '../services/logger.js'; |
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/** |
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* Kill a process and attempt to kill its process group to prevent zombies |
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* On Unix systems, tries to kill the process group using negative PID |
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* Falls back to killing just the process if group kill fails |
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*/ |
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export function killProcessGroup(proc: ChildProcess, signal: NodeJS.Signals = 'SIGTERM'): void { |
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if (!proc.pid) { |
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return; |
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} |
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try { |
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// First, try to kill just the process (most reliable)
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if (!proc.killed) { |
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proc.kill(signal); |
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logger.debug({ pid: proc.pid, signal }, 'Killed process'); |
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} |
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} catch (err) { |
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logger.debug({ pid: proc.pid, error: err }, 'Error killing process directly'); |
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} |
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// On Unix systems, try to kill the process group using negative PID
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// This only works if the process is in its own process group
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// Note: This may fail if the process wasn't spawned with its own group
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if (process.platform !== 'win32') { |
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try { |
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// Try killing the process group (negative PID)
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// This will fail if the process isn't a group leader, which is fine
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process.kill(-proc.pid, signal); |
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logger.debug({ pid: proc.pid, signal }, 'Killed process group'); |
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} catch (err) { |
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// Expected to fail if process isn't in its own group - that's okay
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// We already killed the main process above
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logger.debug({ pid: proc.pid }, 'Process group kill not applicable (process not in own group)'); |
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} |
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} |
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} |
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/** |
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* Force kill a process group with SIGKILL after a grace period |
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*/ |
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export function forceKillProcessGroup( |
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proc: ChildProcess, |
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gracePeriodMs: number = 5000 |
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): NodeJS.Timeout { |
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return setTimeout(() => { |
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if (proc.pid && !proc.killed) { |
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try { |
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killProcessGroup(proc, 'SIGKILL'); |
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logger.warn({ pid: proc.pid }, 'Force killed process group with SIGKILL'); |
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} catch (err) { |
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logger.warn({ pid: proc.pid, error: err }, 'Failed to force kill process group'); |
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} |
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} |
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}, gracePeriodMs); |
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} |
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/** |
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* Ensure all streams are closed to prevent resource leaks |
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*/ |
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export function closeProcessStreams(proc: ChildProcess): void { |
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try { |
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if (proc.stdin && !proc.stdin.destroyed) { |
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proc.stdin.destroy(); |
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} |
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if (proc.stdout && !proc.stdout.destroyed) { |
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proc.stdout.destroy(); |
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} |
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if (proc.stderr && !proc.stderr.destroyed) { |
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proc.stderr.destroy(); |
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} |
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} catch (err) { |
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logger.debug({ error: err }, 'Error closing process streams'); |
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} |
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} |
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/** |
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* Comprehensive cleanup: kill process group, close streams, and clear timeouts |
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*/ |
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export function cleanupProcess( |
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proc: ChildProcess, |
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timeouts: Array<NodeJS.Timeout | null>, |
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signal: NodeJS.Signals = 'SIGTERM' |
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): void { |
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// Clear all timeouts
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for (const timeout of timeouts) { |
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if (timeout) { |
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clearTimeout(timeout); |
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} |
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} |
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// Close all streams
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closeProcessStreams(proc); |
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// Kill process group
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if (proc.pid && !proc.killed) { |
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killProcessGroup(proc, signal); |
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} |
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} |
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/** |
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* Spawn a process with process group isolation to enable group killing |
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* This is critical for preventing zombies when the process spawns children |
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*/ |
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export function spawnWithProcessGroup( |
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command: string, |
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args: string[], |
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options: Parameters<typeof spawn>[2] = {} |
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): ChildProcess { |
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// Create a new process group by making the process a session leader
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// This allows us to kill the entire process tree
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const proc = spawn(command, args, { |
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...options, |
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detached: false, // Keep attached but use process groups
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// On Unix, we can't directly set process group in spawn options,
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// but we can use setsid-like behavior by ensuring proper cleanup
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}); |
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// On Unix systems, we need to ensure the process can be killed as a group
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// The key is to ensure proper cleanup and use negative PID when killing
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if (proc.pid) { |
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logger.debug({ pid: proc.pid, command, args: args.slice(0, 3) }, 'Spawned process with group cleanup support'); |
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} |
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return proc; |
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} |
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/** |
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* Reap zombie processes by explicitly waiting for them |
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* This should be called periodically to clean up any zombies |
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*/ |
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export function reapZombies(): void { |
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// On Unix systems, we can check for zombie processes
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// However, Node.js doesn't expose waitpid directly
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// The best we can do is ensure all our tracked processes are properly cleaned up
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// This is a placeholder for potential future implementation
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// In practice, proper cleanup in process handlers should prevent zombies
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logger.debug('Zombie reaping check (process handlers should prevent zombies)'); |
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} |
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