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[headers.get(\"set-cookie\")!] : []);\n return all.map((s) => s.split(\";\", 1)[0]).filter(Boolean).join(\"; \");\n}\nfunction mergeCookies(a: string, b: string): string {\n const m = new Map();\n for (const c of [a, b]) for (const part of c.split(/;\\s*/)) {\n const i = part.indexOf(\"=\"); if (i > 0) m.set(part.slice(0, i), part.slice(i + 1));\n }\n return [...m].map(([k, v]) => `${k}=${v}`).join(\"; \");\n}\nasync function responseBytes(res: Response): Promise {\n return new Uint8Array(await res.arrayBuffer());\n}\nasync function verify(label: string, url: string, bytes: Uint8Array) {\n const digest = await sha256(bytes);\n return {\n label, url, bytes: bytes.byteLength, sha256: digest,\n pdf_like: pdfLike(bytes),\n exact_size: bytes.byteLength === TARGET.bytes,\n exact_sha256: digest === TARGET.sha256,\n exact: bytes.byteLength === TARGET.bytes && digest === TARGET.sha256,\n };\n}\n\nasync function fetchStatic() {\n const res = await fetch(HORAENG, {\n redirect: \"follow\",\n headers: { \"user-agent\": UA, \"accept\": \"application/pdf,*/*;q=0.8\", \"accept-language\": \"ko-KR,ko;q=0.9\" },\n });\n if (!res.ok) throw new Error(`Horaeng HTTP ${res.status}`);\n const bytes = await responseBytes(res);\n return { bytes, audit: await verify(\"horaeng_static\", res.url || HORAENG, bytes) };\n}\n\nasync function qFetch(url: string, init: RequestInit = {}, cookie = \"\") {\n const headers = new Headers(init.headers);\n headers.set(\"user-agent\", UA);\n headers.set(\"accept-language\", \"ko-KR,ko;q=0.9\");\n if (cookie) headers.set(\"cookie\", cookie);\n const res = await fetch(url, { ...init, headers, redirect: \"follow\" });\n return { res, cookie: mergeCookies(cookie, cookieLine(res.headers)) };\n}\n\nasync function fetchQNet() {\n let cookie = \"\";\n let x = await qFetch(`${QBASE}/man001.do?gSite=L&gId=51`, {}, cookie); cookie = x.cookie;\n\n const detailUrl = `${QBASE}/cst003.do?id=cst00302&gSite=L&gId=51`;\n const form = new URLSearchParams({\n page: \"1\", schType: \"\", schText: \"\", artlSeq: TARGET.artlSeq,\n boardId: \"Q004\", code: \"1008\", menuType: \"cst00309\", cst: \"\",\n });\n x = await qFetch(detailUrl, {\n method: \"POST\",\n body: form,\n headers: { \"content-type\": \"application/x-www-form-urlencoded\", referer: detailUrl },\n }, cookie); cookie = x.cookie;\n if (!x.res.ok) throw new Error(`Q-Net detail HTTP ${x.res.status}`);\n const detail = await x.res.text();\n\n let filePath = TARGET.filePath, fileName = TARGET.filename, fileSeq = TARGET.fileSeq;\n const re = /fileDown\\('([^']+)'\\s*,\\s*'([^']+)'\\s*,\\s*'(\\d+)'\\)/g;\n for (const m of detail.matchAll(re)) {\n if (m[2].includes(\"자연과학개론\")) { filePath = m[1]; fileName = m[2]; fileSeq = m[3]; break; }\n }\n const q = new URLSearchParams({\n id: \"cst00302s01\", gSite: \"L\", gId: \"51\", fileCode: \"R001\",\n filePath, fileName, fileSeq, artlSeq: TARGET.artlSeq, href: \"0\",\n });\n const dl = `${QBASE}/cst003.do?${q.toString()}`;\n x = await qFetch(dl, { headers: { referer: detailUrl, accept: \"application/pdf,*/*;q=0.8\" } }, cookie);\n if (!x.res.ok) throw new Error(`Q-Net attachment HTTP ${x.res.status}`);\n const bytes = await responseBytes(x.res);\n return { bytes, audit: await verify(\"qnet_official_session\", x.res.url || dl, bytes), resolved: { filePath, fileName, fileSeq } };\n}\n\nasync function acquire() {\n const attempts: any[] = [];\n for (const fn of [fetchStatic, fetchQNet]) {\n try {\n const got: any = await fn();\n attempts.push(got.audit);\n if (got.audit.exact) {\n const key = \"pb/2022-r59-natural-science-a/exact.pdf\";\n await blob.set(key, got.bytes);\n const provenance = {\n accepted_at: new Date().toISOString(), target: TARGET, accepted_from: got.audit.label,\n audit: got.audit, resolved: got.resolved ?? 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Diff · v9