Implementation of NSObject's 'description' property (overriding) (#395)

for NSURLHttpResponse object

Author: mamabusi

Foundation/NSURLResponse.swift

@@ -228,6 +228,21 @@ public class NSHTTPURLResponse : URLResponse {
         default: return "Server Error"
         }
     }
+
+    /// A string that represents the contents of the NSHTTPURLResponse Object.
+    /// This property is intended to produce readable output.
+    override public var description: String {
+        var result = "<\(self.dynamicType) \(unsafeAddress(of: self))> { URL: \(url!.absoluteString) }{ status: \(statusCode), headers {\n"
+        for(key, value) in allHeaderFields {
+            if((key.lowercased() == "content-disposition" && suggestedFilename != "Unknown") || key.lowercased() == "content-type") {
+                result += "   \"\(key)\" = \"\(value)\";\n"
+            } else {
+                result += "   \"\(key)\" = \(value);\n"
+            }
+        }
+        result += "} }"
+        return result
+    }
 }
 
 /// Parses the expected content length from the headers.