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- Path = require('path')
- BADCHAR_RX = ///
- [
- \/ # no slashes
- \* # no asterisk
- \u0000-\u001F # no control characters (0-31)
- \u007F # no delete
- \u0080-\u009F # no unicode control characters (C1)
- \uD800-\uDFFF # no unicode surrogate characters
- ]
- ///g
- BADFILE_RX = ///
- (^\.$) # reject . as a filename
- | (^\.\.$) # reject .. as a filename
- | (^\s+) # reject leading space
- | (\s+$) # reject trailing space
- ///g
- MAX_PATH = 1024 # Maximum path length, in characters. This is fairly arbitrary.
- module.exports = SafePath =
- clean: (filename) ->
- filename = filename.replace BADCHAR_RX, '_'
- # for BADFILE_RX replace any matches with an equal number of underscores
- filename = filename.replace BADFILE_RX, (match) ->
- return new Array(match.length + 1).join("_")
- return filename
- isCleanFilename: (filename) ->
- return SafePath.isAllowedLength(filename) &&
- not filename.match(BADCHAR_RX) &&
- not filename.match(BADFILE_RX)
- isAllowedLength: (pathname) ->
- return pathname.length > 0 && pathname.length <= MAX_PATH
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