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"This page contains the following errors:..." when opening a file:/// url ending in .html; page works fine over https with mime type text/html #750

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falsifian opened this issue Jul 25, 2023 · 2 comments
Open

"This page contains the following errors:..." when opening a file:/// url ending in .html; page works fine over https with mime type text/html #750

falsifian opened this issue Jul 25, 2023 · 2 comments

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@falsifian
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Steps to reproduce

Create a file ~/f.html with the following text (which may violate some standard):

<!doctype html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" style="font-family: Inter, Averta, Helvetica, Arial; font-weight: 400; color: #454745; font-size: 16px;">
</html>

Try to open it as a file://... url. Upload it to a web server (serving it as MIME type text/html) and try to open it via an https://... url.

Expected behaviour

vimb treats the file the same over file://... and https://....

Actual behaviour

vimb has no complaints when accessing it over https://...: a blank page is shown. (I actually had a file with some real content; the content is shown without trouble.) But via file:///... I see a red box with this message:

This page contains the following errors:

error on line 1 at column 2: StartTag: invalid element name
Below is a rendering of the page up to the first error.
@falsifian falsifian changed the title "This page contains the following errors:..." when opening a file:/// url ending in .html; page works fine over https with mime type text/html` "This page contains the following errors:..." when opening a file:/// url ending in .html; page works fine over https with mime type text/html Jul 25, 2023
@fanglingsu
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@falsifian This might be related to determining the file mime type from the local file. As I know the mime type is determined by mime-magic. I think your local file ist considered as XML or xhtml, and not as HTML 5 so the XML validation is applied.
The version requested from webserver uses text/html. What shows your system for "file PathToFile"?

@falsifian
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$ file f.html
f.html: exported SGML document text

This is on my OpenBSD-current box, on which I found the bug. For completeness: on Linux it gives a different answer: the file command run on a Debian 10 machine on the exact same file (sha256 checksum 5244c900ab5f11e61dd191a5c39a622b6ae1320c6227c09acbd79ca359e87fea) says HTML document, ASCII text.

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@falsifian @fanglingsu