Nodejs环境，nest 框架，实现类似 Java/SpringBoot下的 @Log 注解方式对Controller调用写日志：
首先创建 log.ts：
import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common';
import 'reflect-metadata';
import { Observable } from 'rxjs';
import { tap } from 'rxjs/operators';
@Injectable()
export class LogInterceptor implements NestInterceptor {
intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
const className = context.getClass().name;
const name = context.getHandler().name;
const request = context.switchToHttp().getRequest();
const logger = new Logger(className);
const token = request.headers['accesstoken'];
logger.info(name, `Call open: ${className}.${name}, token: ${token}`);
const start = Date.now();
return next.handle().pipe(tap(() =>
logger.info(name, `Call done: ${className}.${name}, duration: ${Date.now() - start}ms`)
));
}
}
然后在 NestController 类或者方法上，使用 @UseInterceptors(new LogInterceptor) 注解即可：
import { LogInterceptor } from 'log';
@UseInterceptors(new LogInterceptor)
export class XxxController {
}
上述的方法，对所有的Controller其作用，对service或者其他的类不能起作用。