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// it also supports extensions like .tar.gz | |
export const getFileExtension = (filename: string) => | |
(filename.match(/(\.([^.]*?)(\.([^.]*?))?)(?=\?|#|$)/) || [])[1] ?? ""; | |
//---===---// | |
/* eslint-disable */ | |
const SANITIZE_FILENAME_REGEXP = { | |
NO_LEFT_SPACES: /^\s+/g, | |
NO_SEQ_DOTS: /\.+/g, | |
ILLEGAL: /[\/\?<>\\:\*\|"]/g, | |
CONTROL: /[\x00-\x1f\x80-\x9f]/g, | |
RESERVED: /^\.+$/, | |
WINDOWS_RESERVED: /^(con|prn|aux|nul|com[0-9]|lpt[0-9])(\..*)?$/i, | |
WINDOWS_TRAILING: /[\. ]+$/, | |
}; | |
/* eslint-enable */ | |
interface SanitizeFilenameOptions { | |
replacement?: string; | |
maxLength?: number; | |
} | |
export const sanitizeFilename = ( | |
input: string, | |
{ replacement = "", maxLength = 255 }: SanitizeFilenameOptions = {} | |
) => { | |
if (input.length === 0) { | |
throw new Error("The input needs to be defined"); | |
} | |
const { | |
NO_LEFT_SPACES, | |
NO_SEQ_DOTS, | |
ILLEGAL, | |
CONTROL, | |
RESERVED, | |
WINDOWS_RESERVED, | |
WINDOWS_TRAILING, | |
} = SANITIZE_FILENAME_REGEXP; | |
let sanitized = input | |
.split("?")[0] | |
.split("#")[0] | |
.replace(NO_SEQ_DOTS, ".") | |
.replace(NO_LEFT_SPACES, replacement) | |
.replace(ILLEGAL, replacement) | |
.replace(CONTROL, replacement) | |
.replace(RESERVED, replacement) | |
.replace(WINDOWS_RESERVED, replacement) | |
.replace(WINDOWS_TRAILING, replacement); | |
if (sanitized.length <= maxLength) { | |
return sanitized; | |
} | |
const fileExtension = getFileExtension(sanitized); | |
const fileExtensionLength = fileExtension.length; | |
let endIndex = maxLength - 1; | |
if (fileExtensionLength === 0) { | |
return sanitized.slice(0, endIndex); | |
} | |
// the latest index is equals to length -1 and we also need to consider the . char before the extension | |
endIndex = maxLength - (fileExtensionLength + 2); | |
return `${sanitized.slice(0, endIndex)}.${fileExtension}`; | |
}; | |
export default sanitizeFilename; |
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