| |
|
|
| |
| const invalidPrototcolRegex = /^(%20|\s)*(javascript|data)/im; |
| const ctrlCharactersRegex = /[^\x20-\x7E]/gim; |
| const urlSchemeRegex = /^([^:]+):/gm; |
| const relativeFirstCharacters = ['.', '/']; |
| const STARTS_WITH_PROTOCOL = /^https?:\/\//i; |
|
|
| function isRelativeUrl(url) { |
| return relativeFirstCharacters.indexOf(url[0]) > -1; |
| } |
|
|
| function sanitizeUrl(url) { |
| var urlScheme, urlSchemeParseResults; |
| var sanitizedUrl = url.replace(ctrlCharactersRegex, ''); |
|
|
| if (isRelativeUrl(sanitizedUrl)) { |
| return sanitizedUrl; |
| } |
|
|
| urlSchemeParseResults = sanitizedUrl.match(urlSchemeRegex); |
|
|
| if (!urlSchemeParseResults) { |
| return sanitizedUrl; |
| } |
|
|
| urlScheme = urlSchemeParseResults[0]; |
|
|
| if (invalidPrototcolRegex.test(urlScheme)) { |
| return 'about:blank'; |
| } |
|
|
| return sanitizedUrl; |
| } |
|
|
| |
| |
| const addProtocolToString = (url: string) => { |
| const sanitized = sanitizeUrl(url); |
| if (sanitized === 'about:blank') return sanitized; |
|
|
| if (STARTS_WITH_PROTOCOL.test(url)) { |
| return sanitized; |
| } else { |
| return `https://${sanitized}`; |
| } |
| }; |
|
|
| export default addProtocolToString; |
|
|
