R524809
63 lines
2.1 KiB
TypeScript
63 lines
2.1 KiB
TypeScript
import type { LoggerService } from '@nestjs/common';
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type LogLevel = 'error' | 'warn' | 'log' | 'debug';
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const severity: Record<LogLevel, number> = {
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error: 0,
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warn: 1,
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log: 2,
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debug: 3,
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};
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// 按字段名递归脱敏，日志中不得出现会话、密码、密钥或授权头原文。
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const sensitiveKeys = /authorization|cookie|password|secret|token|api[_-]?key/i;
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export class AppLogger implements LoggerService {
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public constructor(private readonly minimumLevel: LogLevel) {}
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public log(message: unknown, context?: unknown): void {
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this.write('log', message, context);
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}
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public error(message: unknown, stack?: string, context?: unknown): void {
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this.write('error', message, { stack, context });
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}
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public warn(message: unknown, context?: unknown): void {
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this.write('warn', message, context);
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}
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public debug(message: unknown, context?: unknown): void {
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this.write('debug', message, context);
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}
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public verbose(message: unknown, context?: unknown): void {
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this.debug(message, context);
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}
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private write(level: LogLevel, message: unknown, context?: unknown): void {
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if (severity[level] > severity[this.minimumLevel]) return;
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const entry = {
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timestamp: new Date().toISOString(),
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level,
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message: typeof message === 'string' ? message : sanitize(message),
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context: sanitize(context),
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};
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// 每行独立 JSON，方便日志采集系统按字段索引 request_id、状态码等上下文。
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const output = JSON.stringify(entry);
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if (level === 'error') console.error(output);
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else console.log(output);
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}
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}
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function sanitize(value: unknown): unknown {
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if (Array.isArray(value)) return value.map(sanitize);
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if (value && typeof value === 'object') {
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return Object.fromEntries(
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Object.entries(value).map(([key, child]) => [
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key,
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sensitiveKeys.test(key) ? '[REDACTED]' : sanitize(child),
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]),
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);
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}
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return value;
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}
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