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108 lines
3.9 KiB
Markdown
Executable File
108 lines
3.9 KiB
Markdown
Executable File
---
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layout: page
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title: Express 디버깅
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menu: guide
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lang: ko
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description: Learn how to enable and use debugging logs in Express.js applications
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by setting the DEBUG environment variable for enhanced troubleshooting.
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---
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# Express 디버깅
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Express에서 사용되는 모든 내부 로그를 확인하려면, 앱을 실행할 때 `DEBUG` 환경 변수를
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`express:*`로 설정하십시오.
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```bash
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$ DEBUG=express:* node index.js
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```
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Windows에서는 다음과 같은 명령을 사용하십시오.
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```bash
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> set DEBUG=express:* & node index.js
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```
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[Express 생성기](/{{ page.lang }}/starter/generator.html)가 생성한 기본 앱에 대해 이 명령을 실행하면 다음과 같이 인쇄됩니다.
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```bash
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$ DEBUG=express:* node ./bin/www
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express:router:route new / +0ms
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express:router:layer new / +1ms
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express:router:route get / +1ms
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express:router:layer new / +0ms
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express:router:route new / +1ms
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express:router:layer new / +0ms
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express:router:route get / +0ms
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express:router:layer new / +0ms
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express:application compile etag weak +1ms
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express:application compile query parser extended +0ms
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express:application compile trust proxy false +0ms
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express:application booting in development mode +1ms
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express:router use / query +0ms
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express:router:layer new / +0ms
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express:router use / expressInit +0ms
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express:router:layer new / +0ms
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express:router use / favicon +1ms
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express:router:layer new / +0ms
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express:router use / logger +0ms
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express:router:layer new / +0ms
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express:router use / jsonParser +0ms
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express:router:layer new / +1ms
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express:router use / urlencodedParser +0ms
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express:router:layer new / +0ms
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express:router use / cookieParser +0ms
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express:router:layer new / +0ms
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express:router use / stylus +90ms
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express:router:layer new / +0ms
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express:router use / serveStatic +0ms
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express:router:layer new / +0ms
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express:router use / router +0ms
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express:router:layer new / +1ms
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express:router use /users router +0ms
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express:router:layer new /users +0ms
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express:router use / <anonymous> +0ms
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express:router:layer new / +0ms
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express:router use / <anonymous> +0ms
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express:router:layer new / +0ms
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express:router use / <anonymous> +0ms
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express:router:layer new / +0ms
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```
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이후 앱에 대한 요청이 이루어지면, Express 코드에 지정된 로그를 확인할 수 있습니다.
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```bash
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express:router dispatching GET / +4h
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express:router query : / +2ms
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express:router expressInit : / +0ms
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express:router favicon : / +0ms
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express:router logger : / +1ms
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express:router jsonParser : / +0ms
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express:router urlencodedParser : / +1ms
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express:router cookieParser : / +0ms
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express:router stylus : / +0ms
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express:router serveStatic : / +2ms
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express:router router : / +2ms
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express:router dispatching GET / +1ms
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express:view lookup "index.pug" +338ms
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express:view stat "/projects/example/views/index.pug" +0ms
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express:view render "/projects/example/views/index.pug" +1ms
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```
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라우터 구현의 로그만 확인하려면 `DEBUG`의 값을 `express:router`로 설정하십시오. 마찬가지로, 애플리케이션 구현의 로그만 확인하려면 `DEBUG`의 값을 `express:application`으로 설정하십시오. 나머지도 이와 같습니다.
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## `express`를 통해 생성된 애플케이션
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`express` 명령을 통해 생성된 애플리케이션 또한 `debug` 모듈을 사용하며, 이러한 애플리케이션의 디버그 네임스페이스의 범위는 애플리케이션의 이름으로 한정됩니다.
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예를 들어 `$ express sample-app`을 통해 앱을 생성하는 경우에는 다음과 같은 명령을 통해 디버그 명령문을 사용할 수 있습니다.
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```bash
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$ DEBUG=sample-app:* node ./bin/www
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```
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다음과 같이 쉼표로 구분된 이름 목록을 지정하면 2개 이상의 디버그 네임스페이스를 지정할 수 있습니다.
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```bash
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$ DEBUG=http,mail,express:* node index.js
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```
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