fix(learning): remove archive size validation

electron/api/routes/learning.ts

@@ -2,7 +2,6 @@ import { app, dialog, type SaveDialogOptions } from 'electron';
 import type { IncomingMessage, ServerResponse } from 'node:http';
 import { join } from 'node:path';
 import {
-  LEARNING_ARCHIVE_MAX_BYTES,
   LEARNING_MEDIA_MAX_BYTES,
   type LearningProjectDetail,
 } from '../../../shared/learning';
@@ -166,7 +165,7 @@ function projectSummary(value: unknown): Record<string, unknown> {
     cover: projectImage(project.cover),
     tags,
     version: nullableString(project.version, 64),
-    archiveBytes: boundedInteger(project.archiveBytes, 1, LEARNING_ARCHIVE_MAX_BYTES),
+    archiveBytes: boundedInteger(project.archiveBytes, 1, Number.MAX_SAFE_INTEGER),
     publishedAt: isoTimestamp(project.publishedAt),
     updatedAt: isoTimestamp(project.updatedAt),
   };

electron/services/learning-project-download.ts

@@ -1,10 +1,7 @@
 import { createHash, randomUUID } from 'node:crypto';
 import { open, rename, rm } from 'node:fs/promises';
 import { basename, dirname, extname, join } from 'node:path';
-import {
-  LEARNING_ARCHIVE_MAX_BYTES,
-  type LearningProjectDetail,
-} from '../../shared/learning';
+import type { LearningProjectDetail } from '../../shared/learning';
 import type { WorksSquareAccountBinding } from './works-square-session';
 
 const PROJECT_ID_PATTERN = /^[A-Za-z0-9][A-Za-z0-9._-]{0,127}$/;
@@ -53,9 +50,6 @@ function assertCurrentAccount(
 
 function validateProject(project: LearningProjectDetail): void {
   if (!PROJECT_ID_PATTERN.test(project.id)
-    || !Number.isSafeInteger(project.archiveBytes)
-    || project.archiveBytes <= 0
-    || project.archiveBytes > LEARNING_ARCHIVE_MAX_BYTES
     || !SHA256_PATTERN.test(project.archiveSha256)) {
     throw new LearningProjectDownloadError(502, 'LEARNING_PROJECT_INVALID', '项目下载信息无效');
   }
@@ -122,26 +116,15 @@ async function writeVerifiedArchive(input: {
     await input.response.body.cancel().catch(() => undefined);
     throw new LearningProjectDownloadError(502, 'LEARNING_ARCHIVE_MIME_INVALID', '项目压缩包类型无效');
   }
-  const declaredLength = Number(input.response.headers.get('content-length'));
-  if (Number.isFinite(declaredLength) && declaredLength !== input.project.archiveBytes) {
-    await input.response.body.cancel().catch(() => undefined);
-    throw new LearningProjectDownloadError(502, 'LEARNING_ARCHIVE_SIZE_MISMATCH', '项目压缩包大小校验失败');
-  }
-
   const handle = await open(input.temporaryPath, 'wx');
   const hash = createHash('sha256');
   const signature: number[] = [];
-  let bytes = 0;
   const reader = input.response.body.getReader();
   try {
     while (true) {
       const { done, value } = await reader.read();
       if (done) break;
       assertCurrentAccount(input.binding, input.isCurrentAccountBinding);
-      bytes += value.byteLength;
-      if (bytes > input.project.archiveBytes || bytes > LEARNING_ARCHIVE_MAX_BYTES) {
-        throw new LearningProjectDownloadError(502, 'LEARNING_ARCHIVE_SIZE_MISMATCH', '项目压缩包大小校验失败');
-      }
       for (const byte of value.subarray(0, Math.max(0, 4 - signature.length))) signature.push(byte);
       hash.update(value);
       await handle.write(value);
@@ -151,9 +134,6 @@ async function writeVerifiedArchive(input: {
     await handle.close();
   }
 
-  if (bytes !== input.project.archiveBytes) {
-    throw new LearningProjectDownloadError(502, 'LEARNING_ARCHIVE_SIZE_MISMATCH', '项目压缩包大小校验失败');
-  }
   if (signature.length < 4 || signature[0] !== 0x50 || signature[1] !== 0x4b
     || !((signature[2] === 0x03 && signature[3] === 0x04)
       || (signature[2] === 0x05 && signature[3] === 0x06)