AWESOMEDEV
6ba8776e04
1) 브랜치 보호(main): CI 두 개 초록불 + 승인 1 없이는 merge 불가, 학생 직접 push 차단(PR 워크플로), 관리자만 운영·배포용 직접 push (Gitea 설정) 2) 커버리지 측정: - 백엔드 JaCoCo — 현재 라인 36.7%, 바닥 30% ratchet(테스트 지우며 후퇴하면 빌드 실패) - 프론트 vitest 커버리지 — 채점 로직 runSql.js 라인 40% 바닥 3) 린트/포맷 CI 강제: - 프론트 ESLint 9(flat) 신규 — 버그류 에러, 훅 오용 검출 (현재 위반 0) - 백엔드 Spotless — 안 쓰는 import·줄끝 공백·파일끝 개행 (기존 코드 이미 clean, 재정렬 없음) - ci.yml에 포맷검사·린트·커버리지 단계 추가 백엔드 37개 테스트 + 커버리지 게이트 통과, 프론트 ESLint·커버리지 통과 확인. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
460 lines
21 KiB
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460 lines
21 KiB
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<h1><a href="index.html">All files</a> runJs.js</h1>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
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* 이 파일이 하는 일:
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* 학생이 작성한 JavaScript 코드를 "안전하게" 실행하고 테스트케이스로 채점한다.
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*
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* 핵심 아이디어 — Web Worker.
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* 학습 포인트: 브라우저에서 남의 코드를 그냥 eval()로 돌리면 두 가지가 위험하다.
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* 1) while(true) 같은 무한루프가 들어오면 화면이 통째로 얼어붙는다(멈출 방법이 없다).
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* 2) 그 코드가 document를 만져 화면을 부수거나 쿠키를 훔쳐볼 수 있다.
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* Web Worker는 "다른 스레드에서 도는 별도의 방"이다.
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* 1) 오래 걸리면 terminate()로 방을 통째로 없애 버릴 수 있다 → 무한루프 방어
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* 2) Worker 안에는 document도 window도 없다 → 화면을 만질 수 없다
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* 그래서 서버에 Docker 샌드박스를 짓지 않고도, 브라우저가 이미 가진 격리 장치를 빌려 쓴다.
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*
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* ⚠️ 이 안전함이 성립하는 조건 — 반드시 지킬 것.
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* Worker는 완벽한 감옥이 아니다. document는 없지만 fetch는 되고, 같은 출처 API를
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* "그 브라우저의 세션 쿠키를 달고" 호출할 수 있다.
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* 지금 안전한 이유는 단 하나 — "자기 코드를 자기 브라우저에서 자기 권한으로만" 돌리기 때문이다.
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* (실행 지점은 CodingProblemPage 한 곳뿐이고, 코드는 서버가 본인 것만 내려준다.)
|
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*
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* 그러므로 절대 하지 말 것:
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* ❌ 멘토 화면에 "학생 코드 실행해 보기" 버튼 붙이기
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* → 학생이 fetch('/api/mentor/...')를 심어두면 멘토 세션으로 실행된다 = 권한 탈취.
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* 남의 코드를 남의 브라우저에서 돌려야 한다면, 그때는 서버 샌드박스가 필요하다.
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*/
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|
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/** 코드 한 번 실행에 허용할 시간(ms). 넘으면 무한루프로 보고 Worker를 없앤다. */
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const TIMEOUT_MS = <span class="cstat-no" title="statement not covered" >2000;</span>
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|
|
|
/**
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|
* Worker 안에서 돌 코드.
|
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* 학습 포인트: Worker는 별도 파일이 필요한데, 파일을 따로 두는 대신
|
|
* 문자열을 Blob으로 만들어 URL처럼 쓴다(createObjectURL).
|
|
* "파일 하나 늘리지 않고 Worker 쓰기" 관용구다.
|
|
*/
|
|
const workerSource = <span class="cstat-no" title="statement not covered" >`</span>
|
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self.onmessage = function (event) {
|
|
var code = event.data.code;
|
|
var functionName = event.data.functionName;
|
|
var tests = event.data.tests;
|
|
var results = [];
|
|
|
|
// 학생 코드를 평가해서 함수를 꺼낸다.
|
|
var fn;
|
|
try {
|
|
// 학습 포인트: new Function(코드문자열)은 그 코드를 담은 함수를 만들어 준다.
|
|
// 뒤에 return을 덧붙여, 학생이 정의한 함수를 밖으로 꺼내오게 했다.
|
|
// eval()과 달리 바깥 지역 변수에 접근하지 못해(전역 스코프에서 평가된다)
|
|
// 우리 채점 코드의 변수를 학생 코드가 건드릴 수 없다.
|
|
var factory = new Function(code + '\\nreturn typeof ' + functionName + ' === "function" ? ' + functionName + ' : null;');
|
|
fn = factory();
|
|
} catch (e) {
|
|
self.postMessage({ error: '코드에 문법 오류가 있습니다: ' + e.message });
|
|
return;
|
|
}
|
|
if (!fn) {
|
|
self.postMessage({ error: '"' + functionName + '" 함수를 찾을 수 없습니다. 함수 이름을 바꾸지 마세요.' });
|
|
return;
|
|
}
|
|
|
|
for (var i = 0; i < tests.length; i++) {
|
|
var test = tests[i];
|
|
var actual;
|
|
var errorMessage = null;
|
|
try {
|
|
// 인자를 복사해서 넘긴다 — 학생 코드가 배열을 바꿔도 다음 테스트에 영향이 없도록.
|
|
var args = JSON.parse(JSON.stringify(test.args));
|
|
actual = fn.apply(null, args);
|
|
} catch (e) {
|
|
errorMessage = e.message;
|
|
}
|
|
|
|
var expectedText = JSON.stringify(test.expected);
|
|
var actualText = errorMessage ? null : JSON.stringify(actual);
|
|
// 학습 포인트: 배열/객체는 ===로 비교하면 "내용이 같아도" false다(주소를 비교하니까).
|
|
// JSON 문자열로 바꿔 비교하면 내용 비교가 된다. 키 순서까지 같아야 하는 한계는 있지만
|
|
// 우리 문제 범위에서는 충분하다.
|
|
var passed = !errorMessage && actualText === expectedText;
|
|
|
|
results.push({
|
|
name: test.name,
|
|
passed: passed,
|
|
expected: expectedText,
|
|
actual: errorMessage ? ('에러: ' + errorMessage) : (actualText === undefined ? 'undefined' : actualText)
|
|
});
|
|
}
|
|
|
|
self.postMessage({ results: results });
|
|
};
|
|
`;
|
|
|
|
/**
|
|
* 학생 코드를 테스트케이스로 채점한다.
|
|
*
|
|
* @param {string} code 학생이 작성한 코드
|
|
* @param {string} functionName 호출할 함수 이름
|
|
* @param {Array} tests [{name, args, expected}]
|
|
* @returns {Promise<{results?: Array, error?: string}>}
|
|
*/
|
|
export function <span class="fstat-no" title="function not covered" >runJs(</span>code, functionName, tests) {
|
|
<span class="cstat-no" title="statement not covered" > return new Promise(<span class="fstat-no" title="function not covered" >(r</span>esolve) => {</span>
|
|
const blob = <span class="cstat-no" title="statement not covered" >new Blob([workerSource], { type: 'application/javascript' });</span>
|
|
const url = <span class="cstat-no" title="statement not covered" >URL.createObjectURL(blob);</span>
|
|
const worker = <span class="cstat-no" title="statement not covered" >new Worker(url);</span>
|
|
|
|
// 끝났든 시간이 지났든, 뒷정리는 한 곳에서 한다.
|
|
let settled = <span class="cstat-no" title="statement not covered" >false;</span>
|
|
function <span class="fstat-no" title="function not covered" >finish(</span>value) {
|
|
<span class="cstat-no" title="statement not covered" > if (settled) <span class="cstat-no" title="statement not covered" >return;</span></span>
|
|
<span class="cstat-no" title="statement not covered" > settled = true;</span>
|
|
<span class="cstat-no" title="statement not covered" > clearTimeout(timer);</span>
|
|
<span class="cstat-no" title="statement not covered" > worker.terminate();</span>
|
|
<span class="cstat-no" title="statement not covered" > URL.revokeObjectURL(url);</span>
|
|
<span class="cstat-no" title="statement not covered" > resolve(value);</span>
|
|
}
|
|
|
|
const timer = <span class="cstat-no" title="statement not covered" >setTimeout(<span class="fstat-no" title="function not covered" >()</span> => {</span>
|
|
<span class="cstat-no" title="statement not covered" > finish({ error: `실행이 ${TIMEOUT_MS / 1000}초를 넘겼습니다. 무한루프가 아닌지 확인해 보세요.` });</span>
|
|
}, TIMEOUT_MS);
|
|
|
|
<span class="cstat-no" title="statement not covered" > worker.onmessage = <span class="fstat-no" title="function not covered" >(e</span>vent) => <span class="cstat-no" title="statement not covered" >finish(event.data);</span></span>
|
|
<span class="cstat-no" title="statement not covered" > worker.onerror = <span class="fstat-no" title="function not covered" >(e</span>vent) => <span class="cstat-no" title="statement not covered" >finish({ error: '실행 중 오류: ' + event.message });</span></span>
|
|
|
|
<span class="cstat-no" title="statement not covered" > worker.postMessage({ code, functionName, tests });</span>
|
|
});
|
|
}
|
|
</pre></td></tr></table></pre>
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at 2026-07-17T08:57:03.899Z
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