diff --git a/AFNetworking/AFHTTPRequestOperation.h b/AFNetworking/AFHTTPRequestOperation.h
index 2b8390c..520c944 100644
--- a/AFNetworking/AFHTTPRequestOperation.h
+++ b/AFNetworking/AFHTTPRequestOperation.h
@@ -51,6 +51,6 @@ extern NSString * const AFHTTPOperationDidFinishNotification;
 + (id)operationWithRequest:(NSURLRequest *)urlRequest 
                 completion:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error))completion;
 
-- (id)initWithRequest:(NSURLRequest *)urlRequest;
+- (void)setProgressBlock:(void (^)(NSUInteger totalBytesWritten, NSUInteger totalBytesExpectedToWrite))block;
 
 @end
diff --git a/AFNetworking/AFHTTPRequestOperation.m b/AFNetworking/AFHTTPRequestOperation.m
index caeb05c..bf16fe9 100644
--- a/AFNetworking/AFHTTPRequestOperation.m
+++ b/AFNetworking/AFHTTPRequestOperation.m
@@ -33,6 +33,7 @@ typedef enum {
 NSString * const AFHTTPOperationDidStartNotification = @"com.alamofire.http-operation.start";
 NSString * const AFHTTPOperationDidFinishNotification = @"com.alamofire.http-operation.finish";
 
+typedef void (^AFHTTPRequestOperationProgressBlock)(NSUInteger totalBytesWritten, NSUInteger totalBytesExpectedToWrite);
 typedef void (^AFHTTPRequestOperationCompletionBlock)(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error);
 
 static inline NSString * AFKeyPathFromOperationState(AFHTTPOperationState state) {
@@ -80,8 +81,10 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
 @property (nonatomic, assign) BOOL isCancelled;
 @property (readwrite, nonatomic, retain) NSPort *port;
 @property (readwrite, nonatomic, retain) NSMutableData *dataAccumulator;
+@property (readwrite, nonatomic, copy) AFHTTPRequestOperationProgressBlock progress;
 @property (readwrite, nonatomic, copy) AFHTTPRequestOperationCompletionBlock completion;
 
+- (id)initWithRequest:(NSURLRequest *)urlRequest;
 - (void)cleanup;
 @end
 
@@ -96,6 +99,7 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
 @synthesize error = _error;
 @synthesize responseBody = _responseBody;
 @synthesize dataAccumulator = _dataAccumulator;
+@synthesize progress = _progress;
 @synthesize completion = _completion;
 
 + (id)operationWithRequest:(NSURLRequest *)urlRequest 
@@ -134,9 +138,14 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
     [_connection release];
 	
     [_completion release];
+    [_progress release];
     [super dealloc];
 }
 
+- (void)setProgressBlock:(void (^)(NSUInteger totalBytesWritten, NSUInteger totalBytesExpectedToWrite))block {
+    self.progress = block;
+}
+
 - (void)cleanup {
     for (NSString *runLoopMode in self.runLoopModes) {
         [[NSRunLoop currentRunLoop] removePort:self.port forMode:runLoopMode];
@@ -239,14 +248,18 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
 
 #pragma mark - NSURLConnection
 
-- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
+- (void)connection:(NSURLConnection *)connection 
+didReceiveResponse:(NSURLResponse *)response 
+{
     self.response = (NSHTTPURLResponse *)response;
     NSUInteger contentLength = MIN(MAX(abs(response.expectedContentLength), 1024), 1024 * 1024 * 8);
 
     self.dataAccumulator = [NSMutableData dataWithCapacity:contentLength];
 }
 
-- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
+- (void)connection:(NSURLConnection *)connection 
+    didReceiveData:(NSData *)data 
+{
 	[self.dataAccumulator appendData:data];
 }
 
@@ -259,7 +272,9 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
     [self performSelectorOnMainThread:@selector(finish) withObject:nil waitUntilDone:YES modes:[self.runLoopModes allObjects]];
 }
 
-- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {  
+- (void)connection:(NSURLConnection *)connection 
+  didFailWithError:(NSError *)error 
+{  
     self.state = AFHTTPOperationFinishedState;
     
     self.error = error;
@@ -267,6 +282,16 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
     [self performSelectorOnMainThread:@selector(finish) withObject:nil waitUntilDone:YES modes:[self.runLoopModes allObjects]];
 }
 
+- (void)connection:(NSURLConnection *)connection 
+   didSendBodyData:(NSInteger)bytesWritten 
+ totalBytesWritten:(NSInteger)totalBytesWritten 
+totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite
+{
+    if (self.progress) {
+        self.progress(totalBytesWritten, totalBytesExpectedToWrite);
+    }
+}
+
 - (NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse {
     if ([self isCancelled]) {
         return nil;
diff --git a/AFNetworking/AFImageRequestOperation.m b/AFNetworking/AFImageRequestOperation.m
index 3ac0426..9dbcfac 100644
--- a/AFNetworking/AFImageRequestOperation.m
+++ b/AFNetworking/AFImageRequestOperation.m
@@ -46,7 +46,7 @@ static inline CGSize kAFImageRequestRoundedCornerRadii(CGSize imageSize) {
                    options:(AFImageRequestOptions)options
                    success:(void (^)(UIImage *image))success
 {
-    return [self operationWithRequest:urlRequest completion:^(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error) {
+    AFImageRequestOperation *operation = [self operationWithRequest:urlRequest completion:^(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error) {
         UIImage *image = nil;    
         if ([[UIScreen mainScreen] scale] == 2.0) {
             CGImageRef imageRef = [[UIImage imageWithData:data] CGImage];
@@ -70,17 +70,10 @@ static inline CGSize kAFImageRequestRoundedCornerRadii(CGSize imageSize) {
             [[AFImageCache sharedImageCache] cacheImage:image forRequest:request imageSize:imageSize options:options];
         });
     }];
-}
-
-- (id)initWithRequest:(NSURLRequest *)urlRequest {
-    self = [super initWithRequest:urlRequest];
-    if (!self) {
-        return nil;
-    }
     
-    self.runLoopModes = [NSSet setWithObject:NSRunLoopCommonModes];
+    operation.runLoopModes = [NSSet setWithObject:NSRunLoopCommonModes];
     
-    return self;
+    return operation;
 }
 
 @end