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Incorporate better regex from review

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Signed-off-by: RMidhunSuresh <rmidhunsuresh@gmail.com>
This commit is contained in:
RMidhunSuresh 2021-05-12 16:15:30 +05:30
parent 00bcdbab37
commit 851e8d34a4
1 changed files with 11 additions and 14 deletions
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25
src/domain/session/room/timeline/linkify/regex.js
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@ -4,24 +4,20 @@ meaning that any escapes (\) must also
be escaped.
*/
const scheme = "(?:https|http|ftp):\\/\\/";
const host = "[a-zA-Z0-9:.\\[\\]-]";
const noSpaceNorPunctuation = "[^\\s.,?!]";
const hostCharacter = "[a-zA-Z0-9:.\\[\\]-]";
/*
A URL containing path (/) or fragment (#) component
is allowed to end with any character which is not
space nor punctuation. The ending character may be
non-ASCII.
Using non-consuming group here to combine two criteria for the last character.
See point 1 below.
*/
const end = "[^\\s.,?!]";
const additional = `[\\/#][^\\s]*${end}`;
const host = `${hostCharacter}*(?=${hostCharacter})${noSpaceNorPunctuation}`;
/*
Similarly, a URL not containing path or fragment must
also end with a character that is not space nor punctuation.
Additionally, the ending character must also be ASCII.
Use sub groups so we accept just / or #; but if anything comes after it,
it should not end with punctuation or space.
*/
const nonASCII = "\\u{80}-\\u{10ffff}";
const endASCII = `[^\\s${nonASCII}.,?!]`;
const pathOrFragment = `(?:[\\/#](?:[^\\s]*${noSpaceNorPunctuation})?)`;
/*
Things to keep in mind:
@ -30,7 +26,8 @@ Things to keep in mind:
https://matrix.org/<smiley> - valid
https://matrix.org<smiley> - invalid
2. Do not treat punctuation at the end as a part of the URL (.,?!)
3. Path/fragment is optional.
*/
const urlRegex = `${scheme}${host}+(?:${additional}|${endASCII})`;
const urlRegex = `${scheme}${host}${pathOrFragment}?`;
export const regex = new RegExp(urlRegex, "gui");
export const regex = new RegExp(urlRegex, "gi");