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from \"https://esm.town/v/std/blob/main.ts\";\nimport { Jimp } from \"npm:jimp\";\nconst PAGES=[13,14,15,16,17,18,19];\nconst KEY=\"pb/2022-r59-natural-science-a/preview-pack-p13-p19.json\";\nfunction b64(bytes:Uint8Array){let s=\"\";const step=0x8000;for(let i=0;ix.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha(bytes:Uint8Array){const c=new Uint8Array(bytes.length);c.set(bytes);return hex(await crypto.subtle.digest(\"SHA-256\",c));}\nasync function build(){\n const rows:any[]=[];\n for(const p of PAGES){\n const k=`pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`;\n const res=await blob.get(k); const ab=await res.arrayBuffer(); const input=new Uint8Array(ab);\n const img=await Jimp.fromBuffer(ab); img.resize({w:520});\n const out=new Uint8Array(await img.getBuffer(\"image/jpeg\",{quality:52}));\n rows.push({page:p,input_bytes:input.length,input_sha256:await sha(input),preview_bytes:out.length,preview_sha256:await sha(out),jpeg_base64:b64(out)});\n }\n const text=JSON.stringify({source_pdf_sha256:\"baa62634f43206b384ae52f12914b40447d150d41eae4774cfa8c176e9790537\",pages:rows});\n await blob.set(KEY,text);\n return {ok:true,key:KEY,length:text.length,sha256:await sha(new TextEncoder().encode(text)),pages:rows.map(x=>({page:x.page,input_bytes:x.input_bytes,input_sha256:x.input_sha256,preview_bytes:x.preview_bytes,preview_sha256:x.preview_sha256,b64_length:x.jpeg_base64.length}))};\n}\nexport default async function(req:Request){\n const u=new URL(req.url);\n if(u.searchParams.get(\"build\")===\"1\") return Response.json(await build());\n const res=await blob.get(KEY); const text=await res.text();\n const part=Math.max(0,Number(u.searchParams.get(\"part\")||\"0\")); const chunk=Math.min(16000,Math.max(1000,Number(u.searchParams.get(\"chunk\")||\"15000\")));\n const start=part*chunk; return Response.json({ok:true,part,chunk,total_len:text.length,start,end:Math.min(start+chunk,text.length),data:text.slice(start,start+chunk)});\n}",[174],"e7dee0dc-d778-48fd-9ea8-8cb4fe526a79","preview_pack_13_15.ts","01a0979c-5f57-723e-b08f-3d0cab0a2a4e",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Jimp } from \"npm:jimp\";\nconst PAGES=[13,14,15];\nconst KEY=\"pb/2022-r59-natural-science-a/preview-pack-p13-p15.json\";\nfunction b64(bytes:Uint8Array){let s=\"\";const step=0x8000;for(let i=0;ix.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha(bytes:Uint8Array){const c=new Uint8Array(bytes.length);c.set(bytes);return hex(await crypto.subtle.digest(\"SHA-256\",c));}\nasync function build(){\n const rows:any[]=[];\n for(const p of PAGES){\n const k=`pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`;\n const res=await blob.get(k); const ab=await res.arrayBuffer(); const input=new Uint8Array(ab);\n const img=await Jimp.fromBuffer(ab); img.resize({w:620});\n const out=new Uint8Array(await img.getBuffer(\"image/jpeg\",{quality:58}));\n rows.push({page:p,input_bytes:input.length,input_sha256:await sha(input),preview_bytes:out.length,preview_sha256:await sha(out),jpeg_base64:b64(out)});\n }\n const text=JSON.stringify({source_pdf_sha256:\"baa62634f43206b384ae52f12914b40447d150d41eae4774cfa8c176e9790537\",pages:rows});\n await blob.set(KEY,text);\n return {ok:true,key:KEY,length:text.length,sha256:await sha(new TextEncoder().encode(text)),pages:rows.map(x=>({page:x.page,input_bytes:x.input_bytes,input_sha256:x.input_sha256,preview_bytes:x.preview_bytes,preview_sha256:x.preview_sha256,b64_length:x.jpeg_base64.length}))};\n}\nexport default async function(req:Request){\n const u=new URL(req.url);\n if(u.searchParams.get(\"build\")===\"1\") return Response.json(await build());\n const res=await blob.get(KEY); const text=await res.text();\n const 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const k=`pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`;\n const res=await blob.get(k); const ab=await res.arrayBuffer(); const input=new Uint8Array(ab);\n const img=await Jimp.fromBuffer(ab); img.resize({w:520});\n const out=new Uint8Array(await img.getBuffer(\"image/jpeg\",{quality:52}));\n rows.push({page:p,input_bytes:input.length,input_sha256:await sha(input),preview_bytes:out.length,preview_sha256:await sha(out),jpeg_base64:b64(out)});\n }\n const text=JSON.stringify({source_pdf_sha256:\"baa62634f43206b384ae52f12914b40447d150d41eae4774cfa8c176e9790537\",pages:rows});\n await blob.set(KEY,text);\n return {ok:true,key:KEY,length:text.length,sha256:await sha(new TextEncoder().encode(text)),pages:rows.map(x=>({page:x.page,input_bytes:x.input_bytes,input_sha256:x.input_sha256,preview_bytes:x.preview_bytes,preview_sha256:x.preview_sha256,b64_length:x.jpeg_base64.length}))};\n}\nexport default async function(req:Request){\n const u=new URL(req.url);\n if(u.searchParams.get(\"build\")===\"1\") return Response.json(await build());\n const res=await blob.get(KEY); const text=await res.text();\n const part=Math.max(0,Number(u.searchParams.get(\"part\")||\"0\")); const chunk=Math.min(16000,Math.max(1000,Number(u.searchParams.get(\"chunk\")||\"15000\")));\n const start=part*chunk; return Response.json({ok:true,part,chunk,total_len:text.length,start,end:Math.min(start+chunk,text.length),data:text.slice(start,start+chunk)});\n}",[186],"75530eec-fcf1-4f4a-b304-97c57e8105e5","preview.ts","01a0979c-5f57-723e-b08f-34ae728ac462",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Jimp } from \"npm:jimp\";\n\nfunction b64(bytes: Uint8Array): string {\n let s=\"\"; const step=0x8000;\n for(let i=0;ix.toString(16).padStart(2,\"0\")).join(\"\"); }\nasync function sha256(bytes:Uint8Array):Promise{\n const copy=new Uint8Array(bytes.byteLength); copy.set(bytes);\n return hex(await crypto.subtle.digest(\"SHA-256\",copy));\n}\nexport default async function(req:Request):Promise{\n const u=new URL(req.url);\n const p=Number(u.searchParams.get(\"page\")||\"0\");\n if(!Number.isInteger(p)||p<1||p>20) return Response.json({ok:false,error:\"page 1..20 only\"},{status:400});\n const key=`pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`;\n const res=await blob.get(key);\n const inputBuffer=await res.arrayBuffer();\n const input=new Uint8Array(inputBuffer);\n const sourceSha=await sha256(input);\n const img=await Jimp.fromBuffer(inputBuffer);\n img.resize({w:680});\n const out=await img.getBuffer(\"image/jpeg\",{quality:64});\n const bytes=new Uint8Array(out);\n const encoded=b64(bytes);\n const digest=await sha256(bytes);\n if(u.searchParams.get(\"meta\")===\"1\") return Response.json({ok:true,page:p,input_bytes:input.length,input_sha256:sourceSha,width:img.width,height:img.height,preview_bytes:bytes.length,preview_sha256:digest,b64_length:encoded.length});\n const chunkSize=Math.min(16000,Math.max(1000,Number(u.searchParams.get(\"chunk\")||\"15000\")));\n const part=Math.max(0,Number(u.searchParams.get(\"part\")||\"0\"));\n const start=part*chunkSize;\n return Response.json({ok:true,page:p,part,chunk_size:chunkSize,total_len:encoded.length,start,end:Math.min(start+chunkSize,encoded.length),data:encoded.slice(start,start+chunkSize)});\n}",[192],"86184b90-7d84-4e20-888f-7a1332d41e61","page.ts","01a0979c-5f57-723e-b08f-30ed041d1a78",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst KEY = \"pb/2022-r59-natural-science-a/exact.pdf\";\nconst EXACT_SHA = \"baa62634f43206b384ae52f12914b40447d150d41eae4774cfa8c176e9790537\";\n\nfunction b64(bytes: Uint8Array): string {\n let s = \"\";\n const step = 0x8000;\n for (let i = 0; i < bytes.length; i += step) {\n s += String.fromCharCode(...bytes.subarray(i, Math.min(i + step, bytes.length)));\n }\n return btoa(s);\n}\nfunction hex(buf: ArrayBuffer): string {\n return [...new Uint8Array(buf)].map((x) => x.toString(16).padStart(2, \"0\")).join(\"\");\n}\nasync function sha256(bytes: Uint8Array): Promise {\n const copy = new Uint8Array(bytes.byteLength);\n copy.set(bytes);\n return hex(await crypto.subtle.digest(\"SHA-256\", copy));\n}\nfunction latin1(bytes: Uint8Array): string {\n return new TextDecoder(\"latin1\").decode(bytes);\n}\nfunction imageRefs(pdfText: string): number[] {\n const out: number[] = [];\n const re = /\\/Im0\\s+(\\d+)\\s+0\\s+R/g;\n for (const m of pdfText.matchAll(re)) {\n const n = Number(m[1]);\n if (!out.includes(n)) out.push(n);\n }\n return out.slice(0, 20);\n}\nfunction findObjectOffset(text: string, obj: number): number {\n const re = new RegExp(`(?:^|\\\\r\\\\n|\\\\r|\\\\n)${obj} 0 obj(?:\\\\r\\\\n|\\\\r|\\\\n|\\\\s*<<)`, \"g\");\n let m: RegExpExecArray | null;\n let found = -1;\n while ((m = re.exec(text)) !== null) {\n const local = m[0].indexOf(`${obj} 0 obj`);\n found = m.index + local;\n }\n return found;\n}\nfunction extractObjectStream(pdf: Uint8Array, text: string, obj: number): Uint8Array {\n const at = findObjectOffset(text, obj);\n if (at < 0) throw new Error(`object ${obj} not found`);\n const streamWord = text.indexOf(\"stream\", at);\n if (streamWord < 0 || streamWord - at > 1200) throw new Error(`stream for object ${obj} not found`);\n const dict = text.slice(at, streamWord);\n if (!/\\/Subtype\\s*\\/Image/.test(dict) || !/\\/DCTDecode/.test(dict)) throw new Error(`object ${obj} is not DCT image`);\n const lm = dict.match(/\\/Length\\s+(\\d+)/);\n if (!lm) throw new Error(`direct length missing for image object ${obj}`);\n const len = Number(lm[1]);\n let start = streamWord + 6;\n if (text.slice(start, start + 2) === \"\\r\\n\") start += 2;\n else if (text[start] === \"\\n\" || text[start] === \"\\r\") start += 1;\n const bytes = pdf.slice(start, start + len);\n if (bytes.length !== len || bytes[0] !== 0xff || bytes[1] !== 0xd8) throw new Error(`JPEG signature/length failure obj ${obj}`);\n return bytes;\n}\n\nexport default async function(req: Request): Promise {\n const u = new URL(req.url);\n const p = Number(u.searchParams.get(\"page\") || \"0\");\n if (!Number.isInteger(p) || p < 1 || p > 20) return Response.json({ok:false,error:\"page must be 1..20\"},{status:400});\n const res = await blob.get(KEY);\n const pdf = new Uint8Array(await res.arrayBuffer());\n const refs = imageRefs(latin1(pdf));\n if (refs.length !== 20) return Response.json({ok:false,error:`expected 20 Im0 refs, got ${refs.length}`,refs},{status:500});\n const obj = refs[p-1];\n if (u.searchParams.get(\"inspect\") === \"1\") {\n const txt = latin1(pdf);\n const at = txt.indexOf(`${obj} 0 obj`);\n const sw = at >= 0 ? txt.indexOf(\"stream\", at) : -1;\n return Response.json({ok:true,page:p,image_object:obj,object_head:at>=0?txt.slice(at, sw>at?Math.min(sw,at+1600):at+1600):null});\n }\n const jpg = extractObjectStream(pdf, latin1(pdf), obj);\n const digest = await sha256(jpg);\n if (u.searchParams.get(\"raw\") === \"1\") {\n return new Response(jpg,{headers:{\"content-type\":\"image/jpeg\",\"x-pb-page\":String(p),\"x-pb-image-object\":String(obj),\"x-pb-image-sha256\":digest,\"x-pb-source-sha256\":EXACT_SHA}});\n }\n if (u.searchParams.get(\"persist\") === \"1\") {\n const outKey = `pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`;\n await blob.set(outKey, jpg);\n return Response.json({ok:true,page:p,key:outKey,image_object:obj,bytes:jpg.length,sha256:digest,source_sha256:EXACT_SHA});\n }\n const encoded = b64(jpg);\n if (u.searchParams.get(\"meta\") === \"1\") {\n return Response.json({ok:true,page:p,image_object:obj,bytes:jpg.length,sha256:digest,source_sha256:EXACT_SHA,b64_length:encoded.length});\n }\n if (u.searchParams.has(\"part\")) {\n const part = Math.max(0, Number(u.searchParams.get(\"part\") || \"0\"));\n const chunkSize = Math.min(16000, Math.max(1000, Number(u.searchParams.get(\"chunk\") || \"15000\")));\n const start = part * chunkSize;\n return Response.json({ok:true,page:p,part,chunk_size:chunkSize,total_len:encoded.length,start,end:Math.min(start+chunkSize,encoded.length),data:encoded.slice(start,start+chunkSize)});\n }\n return Response.json({ok:true,page:p,image_object:obj,bytes:jpg.length,sha256:digest,source_sha256:EXACT_SHA,jpeg_base64:encoded});\n}",[198],"df63700a-bdbb-4f9d-a099-6fdfa5f0ae44","ocr_p13.ts","01a0979c-5f57-723e-b08f-2f3168f0d0b5",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { createWorker } from \"npm:tesseract.js\";\nexport default async function(){\n const res=await blob.get(\"pb/2022-r59-natural-science-a/page-13.jpg\");\n const ab=await res.arrayBuffer();\n const worker=await createWorker(\"kor+eng\");\n const {data}=await worker.recognize(new Uint8Array(ab));\n await worker.terminate();\n return {page:13,text:data.text};\n}",[204],"b0710b29-72ca-4c35-899d-1c96e6219b77","ocr.ts","01a0979c-5f57-723e-b08f-2984c0d8f9f9",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { createWorker } from \"npm:tesseract.js\";\nexport default async function(req:Request){\n const u=new URL(req.url); const p=Number(u.searchParams.get(\"page\")||\"13\");\n const res=await blob.get(`pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`);\n const ab=await res.arrayBuffer();\n const worker=await createWorker(\"kor+eng\");\n const {data}=await worker.recognize(new Uint8Array(ab));\n await worker.terminate();\n return Response.json({page:p,text:data.text});\n}",[210],"27f9df30-7790-4735-a3af-8251ceff1561","main.ts",2,["D",1789250033032],"// @ts-ignore Val Town supports HTTPS imports.\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst TARGET = {\n bytes: 68_482_517,\n sha256: \"e2ada3e94f70fd257428cc3bd08a7aa44af7ddb1a0a94860af3aee23b52d87e9\",\n filename: \"(등재) 제57회 변리사 1차 문제지 원본(PDF).zip\",\n artlSeq: \"5207047\",\n fileSeq: \"2194931\",\n filePath: \"bbs/Q004/Q004_2194931\",\n};\nconst KEY = \"pb/2020-r57-first-stage-parent/exact.zip\";\nconst PROV_KEY = \"pb/2020-r57-first-stage-parent/provenance.json\";\nconst QBASE = \"https://www.q-net.or.kr\";\nconst UA = \"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36\";\n\nfunction hex(buf: ArrayBuffer): string {\n return [...new Uint8Array(buf)].map((b) => b.toString(16).padStart(2, \"0\")).join(\"\");\n}\nasync function sha256(bytes: Uint8Array): Promise {\n return hex(await crypto.subtle.digest(\"SHA-256\", bytes));\n}\nfunction zipLike(bytes: Uint8Array): boolean {\n return bytes.byteLength > 1000 && bytes[0] === 0x50 && bytes[1] === 0x4b &&\n ((bytes[2] === 0x03 && bytes[3] === 0x04) || (bytes[2] === 0x05 && bytes[3] === 0x06));\n}\nfunction cookieLine(headers: Headers): string {\n const h = headers as Headers & { getSetCookie?: () => string[] };\n const all = h.getSetCookie?.() ?? (headers.get(\"set-cookie\") ? [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 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}\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, zip_like: zipLike(bytes),\n exact_size: bytes.byteLength === TARGET.bytes,\n exact_sha256: digest === TARGET.sha256,\n exact: bytes.byteLength === TARGET.bytes && digest === TARGET.sha256 && zipLike(bytes),\n };\n}\nfunction u16(b: Uint8Array, o: number) { return b[o] | (b[o + 1] << 8); }\nfunction u32(b: Uint8Array, o: number) {\n return (b[o] | (b[o + 1] << 8) | (b[o + 2] << 16) | (b[o + 3] << 24)) >>> 0;\n}\nfunction decodeName(bytes: Uint8Array, utf8: boolean): string {\n try { return new TextDecoder(utf8 ? \"utf-8\" : \"euc-kr\").decode(bytes); }\n catch { return new TextDecoder(\"utf-8\").decode(bytes); }\n}\nfunction listZipMembers(b: Uint8Array) {\n const min = Math.max(0, b.length - 65_557);\n let eocd = -1;\n for (let i = b.length - 22; i >= min; i--) {\n if (b[i] === 0x50 && b[i+1] === 0x4b && b[i+2] === 0x05 && b[i+3] === 0x06) { eocd = i; break; }\n }\n if (eocd < 0) throw new Error(\"EOCD not found\");\n const entries = u16(b, eocd + 10);\n const cdSize = u32(b, eocd + 12);\n const cdOffset = u32(b, eocd + 16);\n const out: any[] = [];\n let p = cdOffset;\n for (let n = 0; n < entries; n++) {\n if (!(b[p]===0x50 && b[p+1]===0x4b && b[p+2]===0x01 && b[p+3]===0x02)) {\n throw new Error(`central directory signature missing at entry ${n} offset ${p}`);\n }\n const flags = u16(b,p+8);\n const method = u16(b,p+10);\n const crc32 = u32(b,p+16).toString(16).padStart(8,\"0\");\n const compressed = u32(b,p+20);\n const uncompressed = u32(b,p+24);\n const nameLen = u16(b,p+28), extraLen=u16(b,p+30), commentLen=u16(b,p+32);\n const localOffset = u32(b,p+42);\n const nameBytes=b.slice(p+46,p+46+nameLen);\n const name=decodeName(nameBytes, Boolean(flags & 0x800));\n out.push({index:n+1,name,method,compressed,uncompressed,crc32,local_offset:localOffset});\n p += 46 + nameLen + extraLen + commentLen;\n }\n return {entries, cd_size:cdSize, cd_offset:cdOffset, members:out};\n}\nasync function fetchQNet() {\n let cookie = \"\";\n let x = await qFetch(`${QBASE}/man001.do?gSite=L&gId=51`, {}, cookie); cookie = x.cookie;\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\", 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 ${x.res.status}`);\n const detail=await x.res.text();\n const candidates:any[]=[];\n const re=/fileDown\\('([^']+)'\\s*,\\s*'([^']+)'\\s*,\\s*'(\\d+)'\\)/g;\n for (const m of detail.matchAll(re)) candidates.push({filePath:m[1],fileName:m[2],fileSeq:m[3]});\n let resolved=candidates.find((z)=>z.fileSeq===TARGET.fileSeq) ??\n candidates.find((z)=>z.fileName.includes(\"57회\") && z.fileName.toLowerCase().includes(\"zip\")) ??\n {filePath:TARGET.filePath,fileName:TARGET.filename,fileSeq:TARGET.fileSeq};\n const q = new URLSearchParams({\n id:\"cst00302s01\", gSite:\"L\", gId:\"51\", fileCode:\"R001\",\n filePath:resolved.filePath, fileName:resolved.fileName, fileSeq:resolved.fileSeq,\n artlSeq:TARGET.artlSeq, href:\"0\",\n });\n const dl=`${QBASE}/cst003.do?${q.toString()}`;\n x=await qFetch(dl,{headers:{referer:detailUrl,accept:\"application/zip,application/octet-stream,*/*;q=0.8\"}},cookie);\n if(!x.res.ok) throw new Error(`Q-Net attachment HTTP ${x.res.status}`);\n const bytes=new Uint8Array(await x.res.arrayBuffer());\n return {bytes,audit:await verify(\"qnet_official_session\",x.res.url||dl,bytes),resolved,candidates};\n}\nasync function acquire() {\n const attempts:any[]=[];\n try {\n const got=await fetchQNet();\n attempts.push(got.audit);\n if(!got.audit.exact) return {ok:false,attempts,resolved:got.resolved,candidates:got.candidates};\n await blob.set(KEY,got.bytes);\n const zip=listZipMembers(got.bytes);\n const provenance={\n accepted_at:new Date().toISOString(),target:TARGET,accepted_from:got.audit.label,\n audit:got.audit,resolved:got.resolved,candidates:got.candidates,\n zip_summary:{entries:zip.entries,cd_size:zip.cd_size,cd_offset:zip.cd_offset},\n members:zip.members,prior_attempts:attempts,\n };\n await blob.setJSON(PROV_KEY,provenance);\n return {ok:true,key:KEY,provenance};\n } catch(e) {\n attempts.push({label:\"fetchQNet\",error:String(e)});\n return {ok:false,attempts};\n }\n}\nasync function verifyStoredBlob() {\n const res=await blob.get(KEY);\n const bytes=new Uint8Array(await res.arrayBuffer());\n return await verify(\"valtown_blob_readback\",`blob://${KEY}`,bytes);\n}\nasync function storedMembers() {\n const res=await blob.get(KEY);\n const bytes=new Uint8Array(await res.arrayBuffer());\n const audit=await verify(\"valtown_blob_readback\",`blob://${KEY}`,bytes);\n if(!audit.exact) return {ok:false,audit};\n return {ok:true,audit,...listZipMembers(bytes)};\n}\n\nexport default async function(req:Request):Promise{\n const url=new URL(req.url);\n if(url.searchParams.get(\"verify_stored\")===\"1\") return Response.json({ok:true,audit:await verifyStoredBlob()});\n if(url.searchParams.get(\"members\")===\"1\") return Response.json(await storedMembers());\n const result=await acquire();\n return Response.json(result,{status:result.ok?200:424});\n}\n",[216],"dd9bcd99-9161-4201-8dbe-c157f6531073","inspect_parent.ts","4f01ae1e-aef5-11f1-8434-1607ee4eb77e",10,["D",1789250404077],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst KEY=\"pb/2020-r57-first-stage-parent/exact.zip\";\nconst EXPECTED_BYTES=68_482_517;\nconst EXPECTED_SHA=\"e2ada3e94f70fd257428cc3bd08a7aa44af7ddb1a0a94860af3aee23b52d87e9\";\n\nfunction hex(buf:ArrayBuffer){return [...new Uint8Array(buf)].map(b=>b.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha256(b:Uint8Array){return hex(await crypto.subtle.digest(\"SHA-256\",b));}\nfunction u16(b:Uint8Array,o:number){return b[o]|(b[o+1]<<8);}\nfunction u32(b:Uint8Array,o:number){return (b[o]|(b[o+1]<<8)|(b[o+2]<<16)|(b[o+3]<<24))>>>0;}\nfunction decodeName(bytes:Uint8Array,utf8:boolean){\n try{return new TextDecoder(utf8?\"utf-8\":\"euc-kr\").decode(bytes);}\n catch{return new TextDecoder(\"utf-8\").decode(bytes);}\n}\nfunction listZipMembers(b:Uint8Array){\n const min=Math.max(0,b.length-65557); let eocd=-1;\n for(let i=b.length-22;i>=min;i--){if(b[i]===0x50&&b[i+1]===0x4b&&b[i+2]===0x05&&b[i+3]===0x06){eocd=i;break;}}\n if(eocd<0)throw new Error(\"EOCD not found\");\n const entries=u16(b,eocd+10),cdSize=u32(b,eocd+12),cdOffset=u32(b,eocd+16);\n const members:any[]=[]; let p=cdOffset;\n for(let n=0;n/자연과학|과학개론|natural/i.test(m.name));\nconst result={\n ok:bytes.length===EXPECTED_BYTES&&digest===EXPECTED_SHA,\n bytes:bytes.length,sha256:digest,expected_bytes:EXPECTED_BYTES,expected_sha256:EXPECTED_SHA,\n zip_entries:zip.entries,cd_size:zip.cd_size,cd_offset:zip.cd_offset,\n candidates,members:zip.members,elapsed_ms:Date.now()-t0\n};\nawait blob.setJSON(\"pb/2020-r57-first-stage-parent/parent_readback_members.json\",result);\nconsole.log(JSON.stringify(result));\nexport default result;",[222],"a5716ba0-6175-47f0-9a0f-318fd1440435","inspect_child_text.ts","7cfd6826-aef5-11f1-bdbd-1607ee4eb77e",12,["D",1789250481227],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport * as pdfjsLib from \"npm:pdfjs-dist/legacy/build/pdf.mjs\";\n\nconst KEY=\"pb/2020-r57-natural-science-a/exact.pdf\";\nconst res=await blob.get(KEY);\nconst bytes=new Uint8Array(await res.arrayBuffer());\nconst task=pdfjsLib.getDocument({data:bytes,disableWorker:true});\nconst pdf=await task.promise;\nconst pages:any[]=[];\nlet totalItems=0,totalChars=0;\nfor(let i=1;i<=pdf.numPages;i++){\n const page=await pdf.getPage(i);\n const tc=await page.getTextContent();\n const items=(tc.items||[]).map((x:any)=>x.str||\"\").filter((s:string)=>s.length>0);\n const text=items.join(\" \");\n totalItems+=items.length; totalChars+=text.length;\n pages.push({page:i,items:items.length,chars:text.length,sample:text.slice(0,500)});\n}\nconst result={num_pages:pdf.numPages,total_items:totalItems,total_chars:totalChars,pages};\nawait blob.setJSON(\"pb/2020-r57-natural-science-a/text_layer_audit.json\",result);\nconsole.log(JSON.stringify(result));\nexport default result;",[229],"7806e4b3-f2ea-40dc-bb94-b9306d36d6ae","extract_child.ts","6bb6bc70-aef5-11f1-a6f7-1607ee4eb77e",11,["D",1789250452243],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { inflateSync } from \"npm:fflate\";\nimport { PDFDocument } from \"npm:pdf-lib\";\n\nconst PARENT_KEY=\"pb/2020-r57-first-stage-parent/exact.zip\";\nconst CHILD_KEY=\"pb/2020-r57-natural-science-a/exact.pdf\";\nconst META_KEY=\"pb/2020-r57-natural-science-a/provenance.json\";\nconst TARGET_NAME=\"제57회 변리사 1차 문제지 원본(PDF)/3교시 A형-hwp.pdf\";\nconst EXPECTED_CHILD_BYTES=5_581_665;\nconst HISTORICAL_SHA_PREFIX=\"96a5df8f\";\nconst HISTORICAL_SHA_SUFFIX=\"d86b87\";\n\nfunction hex(buf:ArrayBuffer){return [...new Uint8Array(buf)].map(b=>b.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha256(b:Uint8Array){return hex(await crypto.subtle.digest(\"SHA-256\",b));}\nfunction u16(b:Uint8Array,o:number){return b[o]|(b[o+1]<<8);}\nfunction u32(b:Uint8Array,o:number){return (b[o]|(b[o+1]<<8)|(b[o+2]<<16)|(b[o+3]<<24))>>>0;}\nfunction decodeName(bytes:Uint8Array,utf8:boolean){try{return new TextDecoder(utf8?\"utf-8\":\"euc-kr\").decode(bytes);}catch{return new TextDecoder(\"utf-8\").decode(bytes);}}\nfunction listZipMembers(b:Uint8Array){\n const min=Math.max(0,b.length-65557); let eocd=-1;\n for(let i=b.length-22;i>=min;i--){if(b[i]===0x50&&b[i+1]===0x4b&&b[i+2]===0x05&&b[i+3]===0x06){eocd=i;break;}}\n if(eocd<0)throw new Error(\"EOCD not found\");\n const entries=u16(b,eocd+10),cdOffset=u32(b,eocd+16); const out:any[]=[]; let p=cdOffset;\n for(let n=0;nx.name===TARGET_NAME) ?? members.find(x=>/3교시 A형/.test(x.name));\nif(!m)throw new Error(\"target member not found\");\nconst child=extractMember(parent,m);\nconst digest=await sha256(child);\nconst pdfLike=new TextDecoder().decode(child.slice(0,8)).startsWith(\"%PDF-\");\nconst pdf=await PDFDocument.load(child,{ignoreEncryption:true,updateMetadata:false});\nconst pages=pdf.getPageCount();\nconst lineageShape=digest.startsWith(HISTORICAL_SHA_PREFIX)&&digest.endsWith(HISTORICAL_SHA_SUFFIX);\nconst exactSize=child.length===EXPECTED_CHILD_BYTES;\nconst ok=pdfLike&&exactSize&&lineageShape;\nif(ok){\n await blob.set(CHILD_KEY,child);\n await blob.setJSON(META_KEY,{\n accepted_at:new Date().toISOString(),\n parent_key:PARENT_KEY,\n parent_bytes:parent.length,\n member:m,\n child_key:CHILD_KEY,\n child_bytes:child.length,\n child_sha256:digest,\n pdf_like:pdfLike,\n page_count:pages,\n historical_lineage:{bytes:EXPECTED_CHILD_BYTES,sha_prefix:HISTORICAL_SHA_PREFIX,sha_suffix:HISTORICAL_SHA_SUFFIX,shape_match:lineageShape},\n });\n}\nconst result={ok,parent_bytes:parent.length,member:m,child_bytes:child.length,child_sha256:digest,pdf_like:pdfLike,page_count:pages,exact_size:exactSize,historical_lineage_shape_match:lineageShape,child_key:ok?CHILD_KEY:null,elapsed_ms:Date.now()-t0};\nconsole.log(JSON.stringify(result));\nexport default result;",[236],"ea1ffaf8-2044-412a-bdd0-8d4fea81f873","contact_13_19.ts","01a0979c-5f57-723e-b08f-208689fc682d",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Jimp } from \"npm:jimp\";\nexport default async function(req:Request){\n const pages=[13,14,15,16,17,18,19];\n const thumbs:any[]=[];\n for(const p of pages){\n const res=await blob.get(`pb/2022-r59-natural-science-a/page-${String(p).padStart(2,\"0\")}.jpg`);\n const ab=await res.arrayBuffer(); const im=await Jimp.fromBuffer(ab); im.resize({w:360});\n thumbs.push(im);\n }\n const w=360*2, h=Math.max(...thumbs.map(x=>x.height))*4;\n const sheet=new Jimp({width:w,height:h,color:0xffffffff});\n let y=[0,0];\n for(let i=0;i

Diff · v13