id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
32849	ManifestStaticFilesStorage newline breaks regex	TZanke	blighj	"Hello,

I am trying to use the `ManifestStaticFilesStorage` static file handling. Right now i found a possible issue with line breaks.

The file in which strings should be replaced is loaded as a string with line breaks:
https://github.com/django/django/blob/main/django/contrib/staticfiles/storage.py#L315

The default regex may not have this issue, `default_template = """"""url(""%(url)s"")""""""` cause a minifier will not break inside this `url()` method. 
https://github.com/django/django/blob/main/django/contrib/staticfiles/storage.py#L45


But in my case a more complex string with URL has to be replaced, so currently the string sometimes contains a line break.
The line break now is not matched against the regex which leads to a caching problem.

Expample:
CKEditor4: https://cdn.ckeditor.com/4.16.1/standard/ckeditor.js
Search for ""styles/tableselection.css""
First occurrence is split by line break.

My regex: `(appendStyleSheet\(this\.path\+""([^'""]*?)""\))`
Regex with newline support: `(appendStyleSheet\(this\s?\.\s?path\s?\+\s?""([^'""]*?)""\))`

Question:
Who is responsible for possible line breaks?
Maybe Django should  load the content without line breaks?
Or has the developer/user of ManifestStaticFilesStorage a responsibility to care for possible line breaks in his regexes?

But: Maybe he (the developer) does not know this can happen. Later on, someone else changes the JS code => minifyer adds linebreaks => production => regex mismatch => caching problem

Let me know whats your opinion.

Best regards
Tobias"	Bug	closed	contrib.staticfiles	3.2	Normal	wontfix			Accepted	1	0	0	1	0	0