[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_152":153,"_154":155},"routes/_app.x.$handle.$name",{"_11":12,"_13":14,"_15":16,"_18":19,"_17":-7,"_115":-5,"_20":116,"_22":117,"_118":119,"_120":121,"_25":122,"_24":-5,"_123":-5,"_124":-5,"_125":53,"_126":127,"_128":44,"_129":-5,"_130":-5,"_131":132},"routes/_app.x.$handle.$name.branch.$branch.code.$",{"_11":12,"_13":14,"_15":16,"_17":-7,"_18":19,"_20":21,"_22":23,"_24":-7,"_25":26,"_27":-5,"_28":-5,"_29":-5,"_30":-5,"_31":-5},"handle","g","name","test-vips","branchName","main","version","path","","project",{"_33":61,"_13":14,"_45":62,"_63":-5,"_64":53,"_65":66,"_67":66,"_68":19,"_69":-5,"_70":71,"_72":37,"_73":44,"_74":-5,"_75":-5,"_76":77,"_78":79,"_80":-5,"_81":-5,"_82":-5,"_83":-5,"_84":85,"_86":85,"_87":88,"_89":88,"_90":88,"_91":85,"_92":85,"_93":94,"_95":96,"_97":98,"_99":53},"tree",[56],"file","contents",[32],"upstream","pull","ahead","behind","envVars",{"_33":34,"_13":35,"_36":37,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":46,"_17":47,"_48":49,"_50":51,"_52":53,"_54":-5,"_18":55},"id","84d2b010-fad4-4d3f-8601-78648a4d1900","main.ts","fileId","1969b418-8bff-11f1-9a0a-1607ee4eb77e","parentId","branchId","28f9c443-52fa-420c-9192-2ca2568a254a","branchVersion",17,"latest",true,"createdAt",["D",1785408331556],16,"fileType","http","content","import { Hono } from \"npm:hono\";\nimport { cors } from \"npm:hono/cors\";\nimport fs from \"node:fs\";\nimport { Zip, ZipPassThrough } from \"npm:fflate\";\n\n// ---------------------------------------------------------\n// 1. HTML Frontend (Served at root \"/\")\n// ---------------------------------------------------------\nconst HTML_FRONTEND = `\n\n\n\n \n \n Wasm-Vips DeepZoom Tiler\n \n\n\n

Pyramid Tiler

Generate DeepZoom (.dzi) archives entirely in-memory.

\n \n \n

\n\n \n\n\n`;\n\n// ---------------------------------------------------------\n// 2. Wasm-Vips Environment Workaround\n// ---------------------------------------------------------\nconst virtualFS = {\n \"/src/build/target/lib/vips-modules-8.18\": { isDir: true, items: [] },\n};\n\nconst patchFs = (method, mockLogic) => {\n const original = fs[method];\n fs[method] = (path, ...args) => {\n const pathStr = path.toString().replace(/\\\\/g, \"/\");\n const vNodeKey = Object.keys(virtualFS).find((k) => pathStr.includes(k));\n return vNodeKey\n ? mockLogic(virtualFS[vNodeKey], pathStr)\n : original(path, ...args);\n };\n};\n\npatchFs(\"lstatSync\", (node) => ({\n isFile: () => !node.isDir,\n isDirectory: () => node.isDir,\n size: 0,\n isBlockDevice: () => false,\n isCharacterDevice: () => false,\n isSymbolicLink: () => false,\n isFIFO: () => false,\n isSocket: () => false,\n mtime: new Date(),\n atime: new Date(),\n ctime: new Date(),\n}));\npatchFs(\"readdirSync\", (node) => node.items || []);\npatchFs(\"readFileSync\", (node, pathStr) => {\n if (node.isDir) {\n throw new Error(\n `EISDIR: illegal operation on a directory, read '${pathStr}'`,\n );\n }\n return Buffer.from(node.content || []);\n});\n\n// ---------------------------------------------------------\n// 3. Initialize VIPS and Hono\n// ---------------------------------------------------------\nconsole.log(\"Loading wasm-vips...\");\nconst { default: VipsInit } = await import(\"npm:wasm-vips\");\nconst vips = await VipsInit();\n\nif (vips.Cache) {\n vips.Cache.max(0);\n}\nconsole.log(\"wasm-vips ready.\");\n\nconst app = new Hono();\napp.use(\"*\", cors());\n\n// ---------------------------------------------------------\n// 4. Routes\n// ---------------------------------------------------------\n\napp.get(\"/\", (c) => c.html(HTML_FRONTEND));\n\napp.post(\"/api/tile\", async (c) => {\n const body = await c.req.parseBody();\n const file = body[\"image\"];\n if (!file || typeof file === \"string\") {\n return c.text(\"Missing image file\", 400);\n }\n\n const tileSize = parseInt(body[\"tileSize\"] || \"256\", 10);\n const overlap = parseInt(body[\"overlap\"] || \"0\", 10);\n const format = body[\"format\"] || \".jpg\";\n\n let image;\n try {\n const arrayBuffer = await file.arrayBuffer();\n image = vips.Image.newFromBuffer(new Uint8Array(arrayBuffer));\n\n const width = image.width;\n const height = image.height;\n\n const maxDim = Math.max(width, height);\n const N = Math.ceil(Math.log2(maxDim));\n\n const readableStream = new ReadableStream({\n async start(controller) {\n let currentImg = image;\n try {\n const zip = new Zip((err, dat, final) => {\n if (err) {\n controller.error(err);\n } else {\n if (dat.length > 0) controller.enqueue(dat);\n if (final) controller.close();\n }\n });\n\n const formatName = format.substring(1);\n const dzi =\n ``;\n\n const dziFile = new ZipPassThrough(\"image.dzi\");\n zip.add(dziFile);\n dziFile.push(new TextEncoder().encode(dzi), true);\n\n for (let i = N; i >= 0; i--) {\n const levelW = currentImg.width;\n const levelH = currentImg.height;\n const numCols = Math.ceil(levelW / tileSize);\n const numRows = Math.ceil(levelH / tileSize);\n\n for (let col = 0; col < numCols; col++) {\n for (let row = 0; row < numRows; row++) {\n let x = col * tileSize;\n let y = row * tileSize;\n if (x !== 0) x -= overlap;\n if (y !== 0) y -= overlap;\n\n let tw = tileSize + (col === 0 ? 0 : overlap) + overlap;\n let th = tileSize + (row === 0 ? 0 : overlap) + overlap;\n\n // Safely clamp bounds so extractArea never crashes on edge tiles\n tw = Math.max(1, Math.min(tw, levelW - x));\n th = Math.max(1, Math.min(th, levelH - y));\n\n try {\n // FIXED: extractArea (camelCase) instead of extract_area\n const tileImg = currentImg.extractArea(x, y, tw, th);\n const outBuffer = tileImg.writeToBuffer(format);\n tileImg.delete(); // GC immediately\n\n const tileFile = new ZipPassThrough(\n `image_files/${i}/${col}_${row}${format}`,\n );\n zip.add(tileFile);\n tileFile.push(outBuffer, true);\n } catch (tileErr) {\n const errFile = new ZipPassThrough(\n `image_files/${i}/ERROR_${col}_${row}.txt`,\n );\n zip.add(errFile);\n errFile.push(\n new TextEncoder().encode(tileErr.toString()),\n true,\n );\n }\n }\n\n // Yield briefly to let the edge network event loop drain the buffers\n await new Promise((r) => setTimeout(r, 1));\n }\n\n if (i > 0) {\n const nextW = Math.max(1, Math.ceil(levelW / 2));\n const nextH = Math.max(1, Math.ceil(levelH / 2));\n\n if (nextW < levelW || nextH < levelH) {\n try {\n const nextImg = currentImg.resize(nextW / levelW, {\n vscale: nextH / levelH,\n });\n if (currentImg !== image) currentImg.delete();\n currentImg = nextImg;\n } catch (resizeErr) {\n console.error(\n `Error resizing down to level ${i - 1}:`,\n resizeErr,\n );\n }\n }\n }\n }\n\n zip.end(); 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Code