lib/ey-hmac/adapter/faraday.rb in ey-hmac-0.0.2 vs lib/ey-hmac/adapter/faraday.rb in ey-hmac-0.0.3

@@ -2,17 +2,21 @@
   def method
     request[:method].to_s.upcase
   end
 
   def content_type
-    %w[CONTENT-TYPE CONTENT_TYPE Content-Type Content_Type].inject(nil){|r, h| r || request[h]}
+    %w[CONTENT-TYPE CONTENT_TYPE Content-Type Content_Type].inject(nil){|r, h| r || request[:request_headers][h]}
   end
 
   def content_digest
-    existing = %w[CONTENT-DIGEST CONTENT_DIGEST Content-Digest Content_Digest].inject(nil){|r,h| r || request[:request_headers][h]}
-    existing || (request[:request_headers]['Content-Digest'] = (body && Digest::MD5.hexdigest(body)))
+    if existing = %w[CONTENT-DIGEST CONTENT_DIGEST Content-Digest Content_Digest].inject(nil){|r,h| r || request[:request_headers][h]}
+      existing
+    elsif digestable = body && Digest::MD5.hexdigest(body)
+      request[:request_headers]['Content-Digest'] = digestable
+    else nil
+    end
   end
-  
+
   def body
     if request[:body] && request[:body].to_s != ""
       request[:body]
     else nil
     end