When hitting an API in a Rails app, it seems that certain headers fail to be parsed. For example, this works:
Accept: application/json
But this doesn't:
Accept: application/json; charset=utf-8
Is failing to understand this 2nd header a legitimate problem with the header? Even if it is, how can I make Rails understand it, or at least understand that it's a request for Json?
The issue is that, in Rails 3.2.14, the Mime::Type.parse method does not support specifying a charset parameter in the Accept header; in fact it only supports the "q" parameter (see the Q_SEPARATOR_REGEXP constant).
In Rails 4, however, the method has been updated to support arbitrary parameters (see this commit), so upgrading to Rails 4 should fix this problem.
If you can't upgrade to Rails 4, I would suggest doing a temporary hack in some Rack middleware to strip out the charset (this assumes you don't actually intend to honour the acceptable charset):
class AcceptCharsetStripper
def initialize(app)
@app = app
end
def call(env)
env["HTTP_ACCEPT"].gsub!(/;\s*charset=\S+/, "")
@app.call(env)
end
end
