Javascript nestjs中间件获取请求/响应正文
我正在为一个项目使用nestjs，并希望记录尽可能多的信息，其中之一就是每个http请求的响应和请求的主体。我为此做了一个嵌套中间件：Javascript nestjs中间件获取请求/响应正文,javascript,node.js,json,typescript,nestjs,Javascript,Node.js,Json,Typescript,Nestjs,我正在为一个项目使用nestjs，并希望记录尽可能多的信息，其中之一就是每个http请求的响应和请求的主体。我为此做了一个嵌套中间件： import {token} from 'gen-uid'; import { inspect } from 'util'; import { Injectable, NestMiddleware, MiddlewareFunction } from '@nestjs/common'; import { Stream } from 'stream'; impor
import {token} from 'gen-uid';
import { inspect } from 'util';
import { Injectable, NestMiddleware, MiddlewareFunction } from '@nestjs/common';
import { Stream } from 'stream';
import { createWriteStream, existsSync, mkdirSync } from 'fs';
@Injectable()
export class LoggerMiddleware implements NestMiddleware {
logfileStream: Stream;
constructor() {
if (!existsSync('./logs')) mkdirSync('./logs');
this.logfileStream = createWriteStream("./logs/serviceName-"+ new Date().toISOString() + ".log", {flags:'a'});
}
resolve(...args: any[]): MiddlewareFunction {
return (req, res, next) => {
let reqToken = token();
let startTime = new Date();
let logreq = {
"@timestamp": startTime.toISOString(),
"@Id": reqToken,
query: req.query,
params: req.params,
url: req.url,
fullUrl: req.originalUrl,
method: req.method,
headers: req.headers,
_parsedUrl: req._parsedUrl,
}
console.log(
"timestamp: " + logreq["@timestamp"] + "\t" +
"request id: " + logreq["@Id"] + "\t" +
"method: " + req.method + "\t" +
"URL: " + req.originalUrl);
this.logfileStream.write(JSON.stringify(logreq));
const cleanup = () => {
res.removeListener('finish', logFn)
res.removeListener('close', abortFn)
res.removeListener('error', errorFn)
}
const logFn = () => {
let endTime = new Date();
cleanup()
let logres = {
"@timestamp": endTime.toISOString(),
"@Id": reqToken,
"queryTime": endTime.valueOf() - startTime.valueOf(),
}
console.log(inspect(res));
}
const abortFn = () => {
cleanup()
console.warn('Request aborted by the client')
}
const errorFn = err => {
cleanup()
console.error(`Request pipeline error: ${err}`)
}
res.on('finish', logFn) // successful pipeline (regardless of its response)
res.on('close', abortFn) // aborted pipeline
res.on('error', errorFn) // pipeline internal error
next();
};
}
}
var mung = require('express-mung');
app.use(mung.json(
function transform(body, req, res) {
console.log(body); // or whatever logger you use
return body;
}
));
providers: [
{
provide: APP_INTERCEPTOR,
useClass: HttpInterceptor,
}
]
import { CallHandler, ExecutionContext, Injectable, Logger, NestInterceptor } from '@nestjs/common';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
@Injectable()
export class HttpInterceptor implements NestInterceptor {
private readonly logger = new Logger(HttpInterceptor.name);
intercept(
context: ExecutionContext,
next: CallHandler<any>,
): Observable<any> | Promise<Observable<any>> {
return next.handle().pipe(
map(data => {
this.logger.debug(data);
return data;
}),
);
}
}