diff --git a/Source/Coders/CMFormCoder.m b/Source/Coders/CMFormCoder.m
index 3ddd510..c90623b 100644
--- a/Source/Coders/CMFormCoder.m
+++ b/Source/Coders/CMFormCoder.m
@@ -51,23 +51,31 @@ - (NSData *)encodeObject:(id)object {
 	NSStringEncoding encoding = NSUTF8StringEncoding;
 	
 	NSMutableArray *pairs = [NSMutableArray new];
-	
-	if (NO == [object isKindOfClass:[NSDictionary class]]) {
-		return nil;
-	}
-	
-	for (NSString *key in [object allKeys]) {
-		id value = [object valueForKey:key];
-		if (NO == [value isKindOfClass:[NSString class]]) {
-			if ([value respondsToSelector:@selector(description)]) {
-				value = [value description];
+
+	NSData *payloadData = nil;
+
+	if (YES == [object isKindOfClass:[NSDictionary class]]) {
+		for (NSString *key in [object allKeys]) {
+			id value = [object valueForKey:key];
+			if (NO == [value isKindOfClass:[NSString class]]) {
+				if ([value respondsToSelector:@selector(description)]) {
+					value = [value description];
+				}
 			}
+			value = [self urlencodeString:value withEncoding:encoding];
+			[pairs addObject:[NSString stringWithFormat:@"%@=%@", key, value]];
 		}
-		value = [self urlencodeString:value withEncoding:encoding];
-		[pairs addObject:[NSString stringWithFormat:@"%@=%@", key, value]];
+		NSString *payloadString = [pairs componentsJoinedByString:@"&"];
+		payloadData = [payloadString dataUsingEncoding:encoding];
+	}
+	else if (YES == [object isKindOfClass:[NSString class]]) {
+		// Preformatted payload string of form @"key1=value1&key2=value2"
+		NSAssert([object containsString:@"="], @"A form payload of type NSString should contain key=value pairs");
+		NSString *payloadString = (NSString *)object;
+		payloadData = [payloadString dataUsingEncoding:encoding];
 	}
-	NSString *payloadString = [pairs componentsJoinedByString:@"&"];
-	return [payloadString dataUsingEncoding:encoding];
+
+	return payloadData;
 }
 
 
diff --git a/Source/Request/CMRequest.h b/Source/Request/CMRequest.h
index 6b59bb3..7ded894 100644
--- a/Source/Request/CMRequest.h
+++ b/Source/Request/CMRequest.h
@@ -131,6 +131,9 @@
 /** When set, the request will include the appropriate 'Range' and 'if-Range' along with 'ETag' and/or 'Last-Modified' headers to request a range of the resource. */
 @property (nonatomic) CMContentRange range;
 
+// The URL if any to which the request was redirected; nil otherwise.
+@property (nonatomic, strong) NSString *redirectURL;
+
 
 
 // ========================================================================== //
diff --git a/Source/Request/CMRequest.m b/Source/Request/CMRequest.m
index 0948b01..715ca93 100644
--- a/Source/Request/CMRequest.m
+++ b/Source/Request/CMRequest.m
@@ -676,6 +676,13 @@ - (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticatio
 
 
 - (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)response {
+	NSHTTPURLResponse *httpURLResponse = (NSHTTPURLResponse *)response;
+	if (httpURLResponse) {
+		if (httpURLResponse.statusCode >= kHTTPStatusMultipleChoices && httpURLResponse.statusCode < kHTTPStatusBadRequest) {
+			// it's a redirect
+			self.redirectURL = [[httpURLResponse allHeaderFields] valueForKey:@"Location"];
+		}
+	}
 	if (response && self.authProviders.count > 0) {
 		NSMutableURLRequest *authorizedRequest = [request mutableCopy];
 		for (id<CMAuthProvider> authProvider in self.authProviders) {