{"record":{"id":"d09a4ca25dcd1be8","repo":"Tencent/WeKnora","slug":"filename-too-long","errorCode":null,"errorMessage":"fileName too long","messagePattern":"fileName too long","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/utils/security.go","lineNumber":142,"sourceCode":"\t}\n\treturn absPath, nil\n}\n\n// SafeFileName 校验并返回安全的“仅文件名”部分，防止路径遍历。\n// 仅保留最后一个路径成分，禁止 \"..\"、空名或仅含点，用于 SaveBytes 等场景。\nfunc SafeFileName(fileName string) (string, error) {\n\tif fileName == \"\" {\n\t\treturn \"\", fmt.Errorf(\"fileName cannot be empty\")\n\t}\n\tbase := filepath.Base(filepath.Clean(fileName))\n\tif base == \"\" || base == \".\" || base == \"..\" {\n\t\treturn \"\", fmt.Errorf(\"invalid fileName: path traversal or empty name\")\n\t}\n\tif strings.Contains(base, \"..\") {\n\t\treturn \"\", fmt.Errorf(\"invalid fileName: contains path traversal\")\n\t}\n\tif len(base) > 255 {\n\t\treturn \"\", fmt.Errorf(\"fileName too long\")\n\t}\n\treturn base, nil\n}\n\n// SafeObjectKey 校验对象存储的 key（如 COS/MinIO objectName），禁止包含 \"..\" 等路径遍历\nfunc SafeObjectKey(objectKey string) error {\n\tif objectKey == \"\" {\n\t\treturn fmt.Errorf(\"object key cannot be empty\")\n\t}\n\tif strings.Contains(objectKey, \"..\") {\n\t\treturn fmt.Errorf(\"object key contains path traversal\")\n\t}\n\treturn nil\n}\n\n// IsValidURL 验证 URL 是否安全\nfunc IsValidURL(url string) bool {\n\tif url == \"\" {","sourceCodeStart":124,"sourceCodeEnd":160,"githubUrl":"https://github.com/Tencent/WeKnora/blob/988cbb03305e055d8ebb7d46d9ac6cc0803cd074/internal/utils/security.go#L124-L160","documentation":"Length validation in SafeFileName: the surviving path component exceeds 255 characters, beyond typical filesystem name limits. The name is rejected so a later OS-level write (e.g., in SaveBytes) cannot fail with a filesystem-dependent ENAMETOOLONG error; callers should shorten the filename.","triggerScenarios":"Thrown at internal/utils/security.go:142 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Truncate the file name to 255 bytes (preserving the extension)","Generate a shorter server-side name for very long client names"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"988cbb03305e055d8ebb7d46d9ac6cc0803cd074","analyzedAt":"2026-09-02T14:41:08.344Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}