sanitize-filename-ts

Sanitize a string to be safe for use as a filename by removing directory paths and invalid characters. This package is a fork of sanitize-filename, updated and rewritten in Typescript.

Install

npm: sanitize-filename-ts

npm install sanitize-filename-ts

Example

1import { sanitize } from "sanitize-filename-ts";
2
3// Some string that may be unsafe or invalid as a filename
4var UNSAFE_USER_INPUT = "~/.\u0000ssh/authorized_keys";
5
6// Sanitize the string to be safe for use as a filename.
7var filename = sanitize(UNSAFE_USER_INPUT);
8// -> "~.sshauthorized_keys"

Details

sanitize-filename-ts removes the following:

• Control characters (0x00–0x1f and 0x80–0x9f)
• Reserved characters (/, ?, <, >, \, :, *, |, and ")
• Unix reserved filenames (. and ..)
• Trailing periods and spaces (for Windows)
• Windows reserved filenames (CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, and LPT9)

The resulting string is truncated to 255 bytes in length. The string will not contain any directory paths and will be safe to use as a filename.

Empty String "" Result

An empty string "" can be returned. For example:

1import { sanitize } from "sanitize-filename-ts";
2sanitize("..");
3// -> ""

Non-unique Filenames

Two different inputs can return the same value. For example:

1import { sanitize } from "sanitize-filename-ts";
2sanitize("file?");
3// -> "file"
4sanitize("*file*");
5// -> "file"

File Systems

Sanitized filenames will be safe for use on modern Windows, OS X, and Unix file systems (NTFS, ext, etc.).

FAT 8.3 filenames are not supported.

Test Your File System

The test program will use various strings (including the Big List of Naughty Strings) to create files in the working directory. Run npm test to run tests against your file system.

API

sanitize(inputString, [options])

Sanitize inputString by removing or replacing invalid characters.

Options:

• options.replacement: optional, string/function, default: "". If passed as a string, it's used as the replacement for invalid characters. If passed as a function, the function will be called with the invalid characters and it's return value will be used as the replacement. See String.prototype.replace for more info.