HTTP Trailers

[henke37]

The 1.1 version of HTTP adds chunked encoding and with it the support to send some headers after the response body.

[NickCraver]

I'd also like to see this added if anyone has the data...finding a lot of conflicting info out there and I'm looking to use it in some libraries.

[kiding]

Firefox supports HTTP trailers but only for Server-Timing and only over HTTPS. (Related to #3674)

Chrome supports trailers only on HTTP/2.

[mitar]

I think Chrome supports trailers only to a degree that it ignores them and that they do not break things. They are not available over HTTP2 at all, nor Sever-Timings over HTTP2 trailers appear in DevTools.