fix: normalize content type by converting file extension to lowercase#4375
fix: normalize content type by converting file extension to lowercase#4375
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Walkthrough此次修改在 Changes
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Actionable comments posted: 0
🧹 Nitpick comments (2)
packages/express-file-server/src/node/express-file-server.contribution.ts (2)
35-35: 建议添加注释说明大小写不敏感的处理为了提高代码的可维护性，建议添加注释说明对文件扩展名进行大小写不敏感处理的原因。
建议添加如下注释：
+ // 统一转换为小写以确保大小写不敏感的扩展名匹配 const contentType = ALLOW_MIME[path.extname(filePath).slice(1).toLowerCase()];
33-46: 建议增强安全性检查当前的安全检查主要依赖白名单路径验证和 MIME 类型检查。建议增加以下安全措施：
- 添加路径遍历（Path Traversal）的显式检查
- 验证 MIME 类型是否在预期的安全范围内
建议添加如下安全检查：
const filePath = URI.parse(`file://${uriPath}`).codeUri.fsPath; + // 检查是否存在路径遍历 + const normalizedPath = path.normalize(filePath); + if (normalizedPath !== filePath) { + ctx.status = 403; + return; + } + const whitelist = this.getWhiteList(); const contentType = ALLOW_MIME[path.extname(filePath).slice(1).toLowerCase()]; + // 定义安全的 MIME 类型白名单 + const SAFE_MIME_TYPES = ['text/plain', 'application/json', 'image/jpeg', /* 添加其他安全的 MIME 类型 */]; + if (!SAFE_MIME_TYPES.includes(contentType)) { + ctx.status = 403; + return; + }
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packages/express-file-server/src/node/express-file-server.contribution.ts(1 hunks)
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🔇 Additional comments (1)
packages/express-file-server/src/node/express-file-server.contribution.ts (1)
35-35: 文件扩展名转小写的修改是合理的！将文件扩展名统一转换为小写是一个很好的改进，这样可以确保不同大小写的扩展名（如 .JPG、.jpg、.Jpg）都能正确匹配到对应的 MIME 类型。这种处理方式与第 42 行的路径验证保持一致，都采用了大小写不敏感的方式。
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🎉 PR Next publish successful! 3.7.1-next-1739756477.0 |
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #4375 +/- ##
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Coverage 54.12% 54.12%
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Files 1639 1639
Lines 100362 100362
Branches 21784 21776 -8
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Hits 54321 54321
Misses 38245 38245
Partials 7796 7796
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