Reader

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';\",\n \" // Fix relative image paths\",\n \" body.querySelectorAll('img').forEach(function(img) {\",\n \" var src = img.getAttribute('src') || '';\",\n \" if (src.charAt(0) === '/') img.src = 'https://atcoder.jp' + src;\",\n \" });\",\n \" document.getElementById('problem').style.display = 'block';\",\n \" // Typeset — MathJax is configured for $...$ so just call it\",\n \" if (window.MathJax && MathJax.typesetPromise) {\",\n \" MathJax.typesetPromise([body]).catch(function(e) { console.error(e); });\",\n \" }\",\n \" setLoading(false);\",\n \" })\",\n \" .catch(function(e) {\",\n \" showErr('Failed: ' + e.message);\",\n \" setLoading(false);\",\n \" });\",\n \"}\",\n \"\",\n \"document.getElementById('url-input').addEventListener('keydown', function(e) {\",\n \" if (e.key === 'Enter') loadProblem();\",\n \"});\",\n ].join(\"\\n\");\n\n // MathJax config as a plain string — no template literal escaping issues\n const mathJaxConfig = [\n \"window.MathJax = {\",\n \" tex: {\",\n \" inlineMath: [['$', '$']],\",\n \" displayMath: [['$$', '$$']],\",\n \" processEscapes: true,\",\n \" packages: {'[+]': ['ams']}\",\n \" },\",\n \" options: {\",\n \" skipHtmlTags: ['script','noscript','style','textarea','pre','code'],\",\n \" processHtmlClass: 'math'\",\n \" },\",\n \" startup: { typeset: false }\",\n \"};\",\n ].join(\"\\n\");\n\n return `\n\n\n\n\nReader\n\n\n\n\n\n

\n \n \n

Source ↗

\n\n\n`;\n}\n\nexport default async function (req: Request): Promise {\n const corsHeaders = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type, X-Atcoder-Url\",\n };\n\n if (req.method === \"OPTIONS\") {\n return new Response(null, { headers: corsHeaders });\n }\n\n // ── API MODE ──────────────────────────────────────────────────────────────\n if (req.method === \"GET\" && req.headers.get(\"X-Atcoder-Url\")) {\n const taskUrl = req.headers.get(\"X-Atcoder-Url\")!;\n\n if (!taskUrl.startsWith(\"https://atcoder.jp/\")) {\n return Response.json(\n { error: \"Only atcoder.jp URLs are allowed\" },\n { status: 403, headers: corsHeaders },\n );\n }\n\n // Always fetch English version server-side too\n const fetchUrl = taskUrl.includes(\"lang=\")\n ? taskUrl.replace(/lang=[a-z]+/, \"lang=en\")\n : taskUrl + (taskUrl.includes(\"?\") ? \"&lang=en\" : \"?lang=en\");\n\n const upstream = await fetch(fetchUrl, {\n headers: {\n \"User-Agent\": \"Mozilla/5.0 (compatible; Reader/1.0)\",\n \"Accept\": \"text/html,application/xhtml+xml\",\n \"Accept-Language\": \"en-US,en;q=0.9\",\n },\n });\n\n if (!upstream.ok) {\n return Response.json(\n { error: `Upstream returned ${upstream.status}` },\n { status: upstream.status, headers: corsHeaders },\n );\n }\n\n const html = await upstream.text();\n\n // Title — AtCoder puts it in \n const titleMatch = html.match(/([\\s\\S]*?)<\\/span>/);\n const title = titleMatch\n ? titleMatch[1].replace(/<[^>]+>/g, \"\").trim()\n : \"\";\n\n // Time / memory\n const timeLimitMatch = html.match(\n /Time Limit[^<]*<\\/td>\\s*]*>([^<]+)/,\n );\n const memLimitMatch = html.match(\n /Memory Limit[^<]*<\\/td>\\s*]*>([^<]+)/,\n );\n const timeLimit = timeLimitMatch ? timeLimitMatch[1].trim() : \"\";\n const memLimit = memLimitMatch ? memLimitMatch[1].trim() : \"\";\n\n // Extract #task-statement\n const broadMatch = html.match(\n /]+id=\"task-statement\"[^>]*>([\\s\\S]{100,})/,\n );\n let statement = \"\";\n if (broadMatch) {\n const raw = broadMatch[1];\n const cutoff = raw.indexOf('

0 ? raw.slice(0, cutoff) : raw.slice(0, 40000);\n }\n\n // Clean: strip scripts/styles, prefix classes, fix paths\n statement = statement\n .replace(//gi, \"\")\n .replace(//gi, \"\")\n .replace(/class=\"([^\"]*)\"/g, 'class=\"ac-$1\"')\n .replace(/src=\"\\/([^\"]*)\"/g, 'src=\"https://atcoder.jp/$1\"')\n .replace(/href=\"\\/([^\"]*)\"/g, 'href=\"https://atcoder.jp/$1\"');\n\n return Response.json(\n { ok: true, title, timeLimit, memLimit, statement, sourceUrl: taskUrl },\n { headers: { ...corsHeaders, \"Content-Type\": \"application/json\" } },\n );\n }\n\n // ── UI MODE ───────────────────────────────────────────────────────────────\n if (req.method === \"GET\") {\n const selfUrl = new URL(req.url).origin + new URL(req.url).pathname;\n return new Response(buildPage(selfUrl), {\n headers: { \"Content-Type\": \"text/html; charset=utf-8\" },\n });\n }\n\n return Response.json(\n { error: \"Method not allowed\" },\n { status: 405, headers: corsHeaders },\n );\n}","deleted","label",[113],"pulls",1,"forks","envVars",{"_136":51,"_138":51},"connections",{"_136":51,"_137":51},"count","unfilledCount","emptyCount",{"_20":112,"_13":113,"_114":115,"_116":-5,"_117":21,"_118":30,"_119":106,"_22":140,"_29":121,"_122":123,"_124":125,"_126":38,"_127":-5,"_141":142,"_87":143},["D",1778557399428],"children",[],[113],["D",1778556386832],{"_11":12,"_85":81},{"_11":12,"_79":-5,"_80":81,"_44":45,"_82":83,"_84":38},{"_29":30,"_13":26,"_20":21,"_27":28,"_31":-5,"_32":-5,"_74":-5,"_75":-5,"_76":-5,"_77":14,"_78":12},"ctx",{"_67":-5,"_108":181,"_182":183,"_184":185,"_186":38,"_187":38,"_188":38,"_189":106,"_190":-5,"_191":-7,"_192":-7,"_193":51,"_194":38,"_195":38,"_196":-5,"_197":38,"_198":38,"_199":38,"_200":-5},"ENV",{"_152":153,"_154":155,"_156":26,"_157":158,"_159":160,"_161":162,"_163":164,"_165":166,"_167":168,"_169":170,"_171":172,"_173":174,"_175":176,"_177":178,"_179":180},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

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