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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 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 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EXPECTED_SHA=\"96a5df8ffd5811f3f4a0477614ccdfb516aa22b8cc03e8c4647500a3a4d86b87\";\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));}\nconst t0=Date.now();\nconst res=await blob.get(KEY);\nconst bytes=new Uint8Array(await res.arrayBuffer());\nconst digest=await sha256(bytes);\nconst pdfLike=new TextDecoder().decode(bytes.slice(0,8)).startsWith(\"%PDF-\");\nconst pdf=await PDFDocument.load(bytes,{ignoreEncryption:true,updateMetadata:false});\nconst result={ok:bytes.length===EXPECTED_BYTES&&digest===EXPECTED_SHA&&pdfLike,bytes:bytes.length,sha256:digest,pdf_like:pdfLike,page_count:pdf.getPageCount(),expected_bytes:EXPECTED_BYTES,expected_sha256:EXPECTED_SHA,elapsed_ms:Date.now()-t0};\nawait blob.setJSON(\"pb/2020-r57-natural-science-a/child_readback.json\",result);\nconsole.log(JSON.stringify(result));\nexport default 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as any).Path2D = Path2D;\nconst pdfjsLib = await import(\"npm:pdfjs-dist/legacy/build/pdf.mjs\");\n\nconst KEY=\"pb/2020-r57-natural-science-a/exact.pdf\";\nconst SOURCE_SHA=\"96a5df8ffd5811f3f4a0477614ccdfb516aa22b8cc03e8c4647500a3a4d86b87\";\nconst res=await blob.get(KEY);\nconst bytes=new Uint8Array(await res.arrayBuffer());\nconst pdf=await pdfjsLib.getDocument({data:bytes,disableWorker:true}).promise;\nconst page=await pdf.getPage(1);\nconst viewport=page.getViewport({scale:1.5});\nconst canvas=createCanvas(Math.ceil(viewport.width),Math.ceil(viewport.height));\nconst ctx=canvas.getContext(\"2d\");\nawait page.render({canvasContext:ctx as any,viewport}).promise;\nconst out=canvas.toBuffer(\"image/jpeg\",85);\nconst outKey=\"pb/2020-r57-natural-science-a/render/page-01.jpg\";\nawait blob.set(outKey,out);\nconst result={ok:true,page:1,width:canvas.width,height:canvas.height,bytes:out.length,key:outKey,source_sha256:SOURCE_SHA};\nconsole.log(JSON.stringify(result));\nexport default result;",[],[114],"5129b744-5243-4d80-9506-c14e2ac615a7","render_mupdf_test.ts","b3cfeabc-aef6-11f1-ba81-1607ee4eb77e",16,["D",1789251002663],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport * as mupdf from \"npm:mupdf\";\n\nconst KEY=\"pb/2020-r57-natural-science-a/exact.pdf\";\nconst SOURCE_SHA=\"96a5df8ffd5811f3f4a0477614ccdfb516aa22b8cc03e8c4647500a3a4d86b87\";\nconst res=await blob.get(KEY);\nconst bytes=new Uint8Array(await res.arrayBuffer());\nconst doc=mupdf.Document.openDocument(bytes,\"application/pdf\");\nconst page=doc.loadPage(0);\nconst pixmap=page.toPixmap(mupdf.Matrix.scale(1.5,1.5),mupdf.ColorSpace.DeviceRGB,false,true);\nconst png=pixmap.asPNG();\nconst outKey=\"pb/2020-r57-natural-science-a/render/page-01.png\";\nawait blob.set(outKey,png);\nconst result={ok:true,pages:doc.countPages(),page:1,png_bytes:png.length,width:pixmap.getWidth(),height:pixmap.getHeight(),key:outKey,source_sha256:SOURCE_SHA};\npixmap.destroy(); page.destroy(); doc.destroy();\nconsole.log(JSON.stringify(result));\nexport default result;",[],[122],"2576b200-aa6a-4234-bae2-4cf23b0fa6cb","render_all_mupdf.ts","c22bc72a-aef6-11f1-96f1-1607ee4eb77e",17,["D",1789251026790],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport * as mupdf from \"npm:mupdf\";\n\nconst KEY=\"pb/2020-r57-natural-science-a/exact.pdf\";\nconst SOURCE_SHA=\"96a5df8ffd5811f3f4a0477614ccdfb516aa22b8cc03e8c4647500a3a4d86b87\";\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));}\nconst res=await blob.get(KEY);\nconst bytes=new Uint8Array(await res.arrayBuffer());\nconst doc=mupdf.Document.openDocument(bytes,\"application/pdf\");\nconst pages:any[]=[];\nfor(let i=0;ib.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha256(b:Uint8Array){return hex(await crypto.subtle.digest(\"SHA-256\",b));}\nfunction cookieLine(headers:Headers){\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){\n const m=new Map();\n for(const c of [a,b]) for(const part of c.split(/;\\s*/)){const i=part.indexOf(\"=\");if(i>0)m.set(part.slice(0,i),part.slice(i+1));}\n return [...m].map(([k,v])=>`${k}=${v}`).join(\"; \");\n}\nasync function qFetch(url:string,init:RequestInit={},cookie=\"\"){\n const headers=new Headers(init.headers);\n headers.set(\"user-agent\",UA);\n headers.set(\"accept-language\",\"ko-KR,ko;q=0.9\");\n if(cookie)headers.set(\"cookie\",cookie);\n const res=await fetch(url,{...init,headers,redirect:\"follow\"});\n return {res,cookie:mergeCookies(cookie,cookieLine(res.headers))};\n}\nasync function recover(){\n const t0=Date.now();\n let cookie=\"\";\n let x=await qFetch(`${QBASE}/man001.do?gSite=L&gId=51`,{},cookie); cookie=x.cookie;\n const detailUrl=`${QBASE}/cst003.do?id=cst00302&gSite=L&gId=51`;\n const form=new URLSearchParams({page:\"1\",schType:\"\",schText:\"\",artlSeq:TARGET.artlSeq,boardId:\"Q004\",code:\"1008\",menuType:\"cst00309\",cst:\"\"});\n x=await qFetch(detailUrl,{method:\"POST\",body:form,headers:{\"content-type\":\"application/x-www-form-urlencoded\",referer:detailUrl}},cookie); cookie=x.cookie;\n const detail=await x.res.text();\n const re=/fileDown\\('([^']+)'\\s*,\\s*'([^']+)'\\s*,\\s*'(\\d+)'\\)/g;\n const candidates=[...detail.matchAll(re)].map(m=>({filePath:m[1],fileName:m[2],fileSeq:m[3]}));\n const resolved=candidates.find(z=>z.fileSeq===TARGET.fileSeq) ?? {filePath:TARGET.filePath,fileName:TARGET.filename,fileSeq:TARGET.fileSeq};\n const q=new URLSearchParams({id:\"cst00302s01\",gSite:\"L\",gId:\"51\",fileCode:\"R001\",filePath:resolved.filePath,fileName:resolved.fileName,fileSeq:resolved.fileSeq,artlSeq:TARGET.artlSeq,href:\"0\"});\n const dl=`${QBASE}/cst003.do?${q.toString()}`;\n x=await qFetch(dl,{headers:{referer:detailUrl,accept:\"application/zip,application/octet-stream,*/*;q=0.8\"}},cookie);\n const contentType=x.res.headers.get(\"content-type\");\n const contentLength=x.res.headers.get(\"content-length\");\n const finalUrl=x.res.url;\n const bytes=new Uint8Array(await x.res.arrayBuffer());\n const digest=await sha256(bytes);\n const zipLike=bytes[0]===0x50&&bytes[1]===0x4b;\n const exact=bytes.length===TARGET.bytes&&digest===TARGET.sha256&&zipLike;\n if(exact) await blob.set(KEY,bytes);\n return {\n ok:exact,http:x.res.status,contentType,contentLength,finalUrl,\n resolved,candidate_count:candidates.length,candidates,\n bytes:bytes.length,sha256:digest,zipLike,exact,\n key:exact?KEY:null,elapsed_ms:Date.now()-t0\n };\n}\n\nconst result = await recover();\nconsole.log(JSON.stringify(result));\nexport default result;\n",[],[138],"501ea8e5-b3c1-4a5c-9d46-7e65d15c0c48","preview_pack_13_19.ts","01a0979c-5f57-723e-b08f-43b04277b24b",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Jimp } from \"npm:jimp\";\nconst PAGES=[13,14,15,16,17,18,19];\nconst KEY=\"pb/2022-r59-natural-science-a/preview-pack-p13-p19.json\";\nfunction b64(bytes:Uint8Array){let s=\"\";const step=0x8000;for(let i=0;ix.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha(bytes:Uint8Array){const c=new Uint8Array(bytes.length);c.set(bytes);return hex(await crypto.subtle.digest(\"SHA-256\",c));}\nasync function build(){\n const rows:any[]=[];\n for(const p of PAGES){\n const k=`pb/2022-r59-natural-science-a/page-${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}",[],[147],"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 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}",[],[154],"97218572-1b9f-4318-a515-bb18337c48f4","preview_pack_07_12.ts","01a0979c-5f57-723e-b08f-39307c8422c5",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { Jimp } from \"npm:jimp\";\nconst PAGES=[7,8,9,10,11,12];\nconst KEY=\"pb/2022-r59-natural-science-a/preview-pack-p07-p12.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}",[],[161],"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-${String(p).padStart(2,\"0\")}.jpg`;\n const res=await blob.get(key);\n const inputBuffer=await res.arrayBuffer();\n const input=new Uint8Array(inputBuffer);\n const sourceSha=await sha256(input);\n const img=await Jimp.fromBuffer(inputBuffer);\n img.resize({w:680});\n const out=await img.getBuffer(\"image/jpeg\",{quality:64});\n const bytes=new Uint8Array(out);\n const encoded=b64(bytes);\n const digest=await sha256(bytes);\n if(u.searchParams.get(\"meta\")===\"1\") return Response.json({ok:true,page:p,input_bytes:input.length,input_sha256:sourceSha,width:img.width,height:img.height,preview_bytes:bytes.length,preview_sha256:digest,b64_length:encoded.length});\n const chunkSize=Math.min(16000,Math.max(1000,Number(u.searchParams.get(\"chunk\")||\"15000\")));\n const part=Math.max(0,Number(u.searchParams.get(\"part\")||\"0\"));\n const start=part*chunkSize;\n return Response.json({ok:true,page:p,part,chunk_size:chunkSize,total_len:encoded.length,start,end:Math.min(start+chunkSize,encoded.length),data:encoded.slice(start,start+chunkSize)});\n}",[],[168],"87c68981-7916-4a66-bd86-29ec586291e9","page_png.ts","d8dcb1e6-aef6-11f1-98ba-1607ee4eb77e",18,["D",1789251064858],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nexport default async function(req:Request){\n const u=new URL(req.url);\n const p=Math.max(1,Math.min(15,Number(u.searchParams.get(\"page\")||\"1\")));\n const key=`pb/2020-r57-natural-science-a/render/page-${String(p).padStart(2,\"0\")}.png`;\n const res=await blob.get(key);\n const bytes=new Uint8Array(await res.arrayBuffer());\n return new Response(bytes,{headers:{\"content-type\":\"image/png\",\"content-length\":String(bytes.length),\"cache-control\":\"public,max-age=3600\",\"x-pb-page\":String(p)}});\n}",[],[175],"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-${String(p).padStart(2,\"0\")}.jpg`;\n await blob.set(outKey, jpg);\n return Response.json({ok:true,page:p,key:outKey,image_object:obj,bytes:jpg.length,sha256:digest,source_sha256:EXACT_SHA});\n }\n const encoded = b64(jpg);\n if (u.searchParams.get(\"meta\") === \"1\") {\n return Response.json({ok:true,page:p,image_object:obj,bytes:jpg.length,sha256:digest,source_sha256:EXACT_SHA,b64_length:encoded.length});\n }\n if (u.searchParams.has(\"part\")) {\n const part = Math.max(0, Number(u.searchParams.get(\"part\") || \"0\"));\n const chunkSize = Math.min(16000, Math.max(1000, Number(u.searchParams.get(\"chunk\") || \"15000\")));\n const start = part * chunkSize;\n return Response.json({ok:true,page:p,part,chunk_size:chunkSize,total_len:encoded.length,start,end:Math.min(start+chunkSize,encoded.length),data:encoded.slice(start,start+chunkSize)});\n }\n return Response.json({ok:true,page:p,image_object:obj,bytes:jpg.length,sha256:digest,source_sha256:EXACT_SHA,jpeg_base64:encoded});\n}",[],[183],"df63700a-bdbb-4f9d-a099-6fdfa5f0ae44","ocr_p13.ts","01a0979c-5f57-723e-b08f-2f3168f0d0b5",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { createWorker } from \"npm:tesseract.js\";\nexport default async function(){\n const res=await blob.get(\"pb/2022-r59-natural-science-a/page-13.jpg\");\n const ab=await res.arrayBuffer();\n const worker=await createWorker(\"kor+eng\");\n const {data}=await worker.recognize(new Uint8Array(ab));\n await worker.terminate();\n return {page:13,text:data.text};\n}",[],[190],"b0710b29-72ca-4c35-899d-1c96e6219b77","ocr.ts","01a0979c-5f57-723e-b08f-2984c0d8f9f9",["D",1789250002609],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { createWorker } from \"npm:tesseract.js\";\nexport default async function(req:Request){\n const u=new URL(req.url); const p=Number(u.searchParams.get(\"page\")||\"13\");\n const res=await blob.get(`pb/2022-r59-natural-science-a/page-${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}",[],[197],"e439d1a9-7211-4e19-aafc-e3cf8df55832","mirror_hash.ts","1fdb6aa6-aef7-11f1-9508-1607ee4eb77e",20,["D",1789251183950],"const TARGET={bytes:5581665,sha256:\"96a5df8ffd5811f3f4a0477614ccdfb516aa22b8cc03e8c4647500a3a4d86b87\"};\nconst urls=[\n {label:\"megaexpert\",url:\"https://file.megaexpert.co.kr/script/fileDown.asp?name=board%2Fon%2F7245_2023072320_01.pdf\"},\n {label:\"allaboutwealth\",url:\"https://blog.kakaocdn.net/dna/cV6oIM/btrNvhA5O82/AAAAAAAAAAAAAAAAAAAAAFecHnlM8ymbyvGpxTMmu_pQWiFDw3Jx-VHPSvlfDzbv/2020%EB%85%84%20%EC%A0%9C57%ED%9A%8C%20%EB%B3%80%EB%A6%AC%EC%82%AC%201%EC%B0%A8%20%EC%9E%90%EC%97%B0%EA%B3%BC%ED%95%99%EA%B0%9C%EB%A1%A0%20A%ED%98%95.pdf?allow_ip=&allow_referer=&attach=1&credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&expires=1785509999&knm=tfile.pdf&signature=ORz5BbhfasmpxBERorvLyhc7Ox0%3D\"},\n {label:\"wirebox\",url:\"https://blog.kakaocdn.net/dna/c3sUUT/btsKLxswCcL/AAAAAAAAAAAAAAAAAAAAAH5Bw5QDGK6NchcctZQk6vXSSwu7pTmKl2Kca6O7aqR7/2020%EB%85%84%EB%8F%84%20%EC%A0%9C57%ED%9A%8C%20%EB%B3%80%EB%A6%AC%EC%82%AC%20%EA%B5%AD%EA%B0%80%EC%9E%90%EA%B2%A9%EC%8B%9C%ED%97%98%20%EC%A0%9C1%EC%B0%A8%EC%8B%9C%ED%97%98%20%EC%9E%90%EC%97%B0%EA%B3%BC%ED%95%99%EA%B0%9C%EB%A1%A0%20A%ED%98%95.pdf?allow_ip=&allow_referer=&attach=1&credential=yqXZFxpELC7KVnFOS48ylbz2pIh7yKj8&expires=1772290799&knm=tfile.pdf&signature=EebRRLfa9TGgZhZXACD8eU%2BbTpM%3D\"}\n];\nfunction hex(buf:ArrayBuffer){return [...new Uint8Array(buf)].map(b=>b.toString(16).padStart(2,\"0\")).join(\"\");}\nasync function sha(b:Uint8Array){return hex(await crypto.subtle.digest(\"SHA-256\",b));}\nconst out:any[]=[];\nfor(const x of urls){\n try{\n const r=await fetch(x.url,{redirect:\"follow\",headers:{\"user-agent\":\"Mozilla/5.0\",\"referer\":x.label===\"megaexpert\"?\"https://www.megaexpert.co.kr/\":\"https://tistory.com/\"}});\n const b=new Uint8Array(await r.arrayBuffer());\n const digest=await sha(b);\n out.push({label:x.label,http:r.status,final_url:r.url,content_type:r.headers.get(\"content-type\"),bytes:b.length,sha256:digest,exact:b.length===TARGET.bytes&&digest===TARGET.sha256});\n }catch(e){out.push({label:x.label,error:String(e)});}\n}\nconsole.log(JSON.stringify({target:TARGET,results:out}));\nexport default {target:TARGET,results:out};",[],[204],"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;",[],[212],"c6828140-b7be-4f68-a05a-22e7335f14aa","inspect_mupdf_text.ts","003d501a-aef7-11f1-bfbe-1607ee4eb77e",19,["D",1789251130921],"import { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport * as mupdf from \"npm:mupdf\";\nconst KEY=\"pb/2020-r57-natural-science-a/exact.pdf\";\nconst res=await blob.get(KEY);\nconst bytes=new Uint8Array(await res.arrayBuffer());\nconst doc=mupdf.Document.openDocument(bytes,\"application/pdf\");\nconst pages:any[]=[];\nlet total=0;\nfor(let i=0;ix.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;",[],[228],"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