feat: integrate SimpleCADAPI 2.0.2 CAD workflows

2026-08-03 11:17:05 +08:00
parent b5738e9109
commit c3a0f269b7
481 changed files with 110229 additions and 12826 deletions
@@ -0,0 +1,91 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { BASE_LIMITS, preflightZipBytes } from "../src/index.js";
+
+function declaredDeflateZip(
+  compressed: Uint8Array,
+  uncompressedSize: number,
+  localUncompressedSize = uncompressedSize,
+): Buffer {
+  const name = Buffer.from("scene.json", "ascii");
+  const local = Buffer.alloc(30);
+  local.writeUInt32LE(0x04034b50, 0);
+  local.writeUInt16LE(20, 4);
+  local.writeUInt16LE(0x0800, 6);
+  local.writeUInt16LE(8, 8);
+  local.writeUInt16LE(0, 10);
+  local.writeUInt16LE(0x0021, 12);
+  local.writeUInt32LE(0, 14);
+  local.writeUInt32LE(compressed.byteLength, 18);
+  local.writeUInt32LE(localUncompressedSize, 22);
+  local.writeUInt16LE(name.length, 26);
+  local.writeUInt16LE(0, 28);
+
+  const centralOffset = local.length + name.length + compressed.byteLength;
+  const central = Buffer.alloc(46);
+  central.writeUInt32LE(0x02014b50, 0);
+  central.writeUInt16LE(0x0314, 4);
+  central.writeUInt16LE(20, 6);
+  central.writeUInt16LE(0x0800, 8);
+  central.writeUInt16LE(8, 10);
+  central.writeUInt16LE(0, 12);
+  central.writeUInt16LE(0x0021, 14);
+  central.writeUInt32LE(0, 16);
+  central.writeUInt32LE(compressed.byteLength, 20);
+  central.writeUInt32LE(uncompressedSize, 24);
+  central.writeUInt16LE(name.length, 28);
+  central.writeUInt16LE(0, 30);
+  central.writeUInt16LE(0, 32);
+  central.writeUInt16LE(0, 34);
+  central.writeUInt16LE(0, 36);
+  central.writeUInt32LE(0x81a40000, 38);
+  central.writeUInt32LE(0, 42);
+
+  const eocd = Buffer.alloc(22);
+  eocd.writeUInt32LE(0x06054b50, 0);
+  eocd.writeUInt16LE(0, 4);
+  eocd.writeUInt16LE(0, 6);
+  eocd.writeUInt16LE(1, 8);
+  eocd.writeUInt16LE(1, 10);
+  eocd.writeUInt32LE(central.length + name.length, 12);
+  eocd.writeUInt32LE(centralOffset, 16);
+  eocd.writeUInt16LE(0, 20);
+  return Buffer.concat([local, name, compressed, central, name, eocd]);
+}
+
+function assertError(archive: Uint8Array, expected: string): void {
+  assert.throws(() => preflightZipBytes(archive), (error) => {
+    assert.equal((error as Error).message, expected);
+    return true;
+  });
+}
+
+test("aggregate ratio uses cross-checked declarations before inflate", () => {
+  const compressed = Buffer.from([0]);
+  const template = declaredDeflateZip(compressed, 0);
+  const exactSize = template.length * BASE_LIMITS.compression_ratio;
+
+  assertError(
+    declaredDeflateZip(compressed, exactSize),
+    'member compression ratio exceeds limit: "scene.json"',
+  );
+  assertError(
+    declaredDeflateZip(compressed, exactSize + 1),
+    "aggregate compression ratio exceeds limit",
+  );
+  assertError(
+    declaredDeflateZip(compressed, exactSize + 1, exactSize),
+    "ZIP central/local header mismatch",
+  );
+});
+
+test("zero compressed size uses one as the member ratio denominator", () => {
+  assertError(
+    declaredDeflateZip(Buffer.alloc(0), BASE_LIMITS.compression_ratio),
+    'invalid deflate stream: "scene.json"',
+  );
+  assertError(
+    declaredDeflateZip(Buffer.alloc(0), BASE_LIMITS.compression_ratio + 1),
+    'member compression ratio exceeds limit: "scene.json"',
+  );
+});