From d8f074dcfaa6775f4692d932b3e960d684c88117 Mon Sep 17 00:00:00 2001
From: Daniel Rinser <github@danielrinser.de>
Date: Fri, 5 Oct 2012 15:56:48 +0200
Subject: [PATCH] [Issue #559] Fixed body for NSNull parameter values in
 multipart/form-data requests

Parts for parameters with a value of NSNull now have an empty body rather than "<null>" (which was produced by -[NSNull description]).
---
 AFNetworking/AFHTTPClient.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index 2cb0bdc..5cb457d 100755
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -473,6 +473,8 @@ static void AFNetworkReachabilityReleaseCallback(const void *info) {}
             NSData *data = nil;
             if ([pair.value isKindOfClass:[NSData class]]) {
                 data = pair.value;
+            } else if ([pair.value isKindOfClass:[NSNull class]]) {
+                data = [NSData data];
             } else {
                 data = [[pair.value description] dataUsingEncoding:self.stringEncoding];
             }