Add tests for charsets_provided

Fix cases where the q-value is 0 and where a wildcard
was sent in the accept-charset header.

Also don't send a charset in the content-type of the
response if the media type is not text.

Thanks to Philip Witty for help figuring this out.

1 files changed, 3 insertions, 0 deletions

diff --git a/doc/src/manual/cowboy_rest.asciidoc b/doc/src/manual/cowboy_rest.asciidoc
index 19f4820..dd5fa7e 100644
--- a/doc/src/manual/cowboy_rest.asciidoc
+++ b/doc/src/manual/cowboy_rest.asciidoc
@@ -175,6 +175,9 @@ req() :: #{
 }
 ----
 
+Note that Cowboy will only append the charset to the
+content-type header of the response if the media type is text.
+
 === content_types_accepted
 
 [source,erlang]