challenge(req, res, stale=false)
public
Returns a challenge response
which asks for for authentication information
# File lib/webrick/httpauth/digestauth.rb, line 134
def challenge(req, res, stale=false)
nonce = generate_next_nonce(req)
if @use_opaque
opaque = generate_opaque(req)
@opaques[opaque].nonce = nonce
end
param = Hash.new
param["realm"] = HTTPUtils::quote(@realm)
param["domain"] = HTTPUtils::quote(@domain.to_a.join(" ")) if @domain
param["nonce"] = HTTPUtils::quote(nonce)
param["opaque"] = HTTPUtils::quote(opaque) if opaque
param["stale"] = stale.to_s
param["algorithm"] = @algorithm
param["qop"] = HTTPUtils::quote(@qop.to_a.join(",")) if @qop
res[@response_field] =
"#{@auth_scheme} " + param.map{|k,v| "#{k}=#{v}" }.join(", ")
info("%s: %s", @response_field, res[@response_field]) if $DEBUG
raise @auth_exception
end