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A warning when a css resource could not be downloaded & apply styles only to elements within (and itself) the body #395

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@horch004 horch004 commented Feb 2, 2024

  • Let GetCssBlocks add a warning to the list instead of throwing an exception when a resource could not be downloaded.

  • With an All (*) selector in the stylesheet, the css rule is also applied to the html element, head element and elements in the head like script, link etc. To avoid this behaviour only the elements from the body (and itself) are selected to be matched.

Maybe there is another way not to match the all selector to the elements above the body, but this was a quick fix for us.

@horch004 horch004 changed the title A waring when a css resource could not be downloaded & apply styles only to elements within (and itself) the body A warning when a css resource could not be downloaded & apply styles only to elements within (and itself) the body Feb 2, 2024
Comment on lines +254 to +262
try
{
return cssSource.GetCss();
}
catch (Exception ex)
{
_warnings.Add(ex.Message);
return string.Empty;
}
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I'm honestly a bit torn on this change. If your html needs a CSS source and it is not available, aren't we breaking things by ignoring that and silently moving ahead?

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I'm a bit confused. When a stylesheet contains bogus or bad css the parser silently ignores it, but when the url is not found (e.g. someone deleted it) the whole process exits with an exception?
The purpose of adding a warning is that the caller can know something is wrong, but that the process of inlining is not stopped. There might be other stylesheets and/or style nodes involved that can be processed.

Now we have to proceed with emailing without any inline style when such an exception occurs because a client forgot to edit his email template after removing a stylesheet from its website.

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(horch004 is my private github. whorchner from my work)

W Hörchner added 2 commits January 23, 2025 13:01
…ied to the html element, head element and elements in the head like script, link etc.

To avoid this behaviour only the elements from the body (and itself) are selected to be matched.
…eption when a resource could not be downloaded.
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3 participants