Lower-casing of HTTP headers

[Eric24]

Does koa actively force received HTTP headers to lower case? By the time I see the contents of ctx.request.header, they are lower-case, but I couldn't find anything in the docs that says koa is doing this. If it is, is there a way to get access to the "raw/unmodified" headers?

[dead-horse]

it is converted to lowercase by node, and you can access the raw headers by ctx.req.rawHeaders. Read node's documents to get more information.