feat(plugins): send accept header in webServer url checking #16251
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This PR sets the Accept HTTP header to
*/*
for HTTP requests made by the webServer plugin when using a URL to check if the server has already started. So far, the Accept header was not being sent at all, which should be semantically equivalent to sending*/*
, according to RFC 7231. However, there are some web servers that handle this differently. Most notably, Vite's server just returns a 404 if theAccept
header is missing from the request. I created vitejs/vite#9520 in order to address the issue on their side, but I think it's also fine to just add the header here, which is why I created this PR.