JXHTTP 是来自 tumblr 的 iOS 和 OS X 上的网络连接库。它利用操作队列和GCD对Cocoa的内置NSURLConnection对象提供了强大的包装，加入许多有用的功能如：块响应对象和跨越多个请求过程跟踪。它致力于成为尽可能轻量级和可读性，使它更易于使用或自定义高级的行为。

示例

Asynchronous

JXHTTPOperation *op = [JXHTTPOperation withURLString:@"https://encrypted.google.com/"];  op.didFinishLoadingBlock = ^(JXHTTPOperation *op) { NSLog(@"%@", op.responseString);  };    [[JXHTTPOperationQueue sharedQueue] addOperation:op];

Synchronous

JXHTTPOperation *op = [JXHTTPOperation withURLString:@"https://encrypted.google.com/"];  [op startAndWaitUntilFinished]; NSLog(@"%@", op.responseString);

Complex

NSURL *postURL = [NSURL URLWithString:@"https://web.site/api/POST"]; NSDictionary *postParams = @{ @"make": @"Ferrari", @"model": @"458 Italia" };    JXHTTPOperation *op = [[JXHTTPOperation alloc] initWithURL:postURL];  op.requestBody = [[JXHTTPFormEncodedBody alloc] initWithDictionary:postParams];  op.requestCachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;  op.responseDataFilePath = @"/tmp/downloaded_data";  op.trustedHosts = @[ postURL.host ];  op.performsBlocksOnMainQueue = YES;    op.didSendDataBlock = ^(JXHTTPOperation *op) { NSLog(@"%lld bytes uploaded so far", op.bytesUploaded);  };    [[JXHTTPOperationQueue sharedQueue] addOperation:op];

项目主页：http://www.open-open.com/lib/view/home/1417422179393