带有 Cookie 的 Objective-C 异步 Web 请求 [英] Objective-C Asynchronous Web Request with Cookies

问题描述

我正在用 Objective-C 编写一个程序，我需要向 Web 服务器发出 Web 请求，但我是异步的，而且我在 mac 上还是个新手，我非常擅长 Windows 技术，但我需要知道，如果我使用NSOperation(在 10.5 中引入，我假设它不会在 10.4 MAC 中运行?)，或者它是否被实现为利用了将在 10.4 上可用的系统线程?

I am writing a program in Objective-C and I need to make web requests to web server, but asynchronously and I am fairly new on mac, I am very good at windows technologies, but I need to know that if I use NSOperation (introduced in 10.5, i am assuming that it will not run in 10.4 MAC?), or if it was implemented such that it utilizes system threading which will be available on 10.4?

或者我应该创建一个新线程并创建一个新的runloop，以及如何使用cookie等，如果有人能给我一个小例子，那将有很大帮助.如果可能，我希望此示例也能在 mac 10.4 上运行.

Or I should create a new thread and create a new runloop, also how to use cookies etc, if anyone can give me one small example, that will be of great help. I want this sample to run on mac 10.4 too if possible.

推荐答案

有一个很好的例子，它使用 NSURLRequest 和 NSHTTPCookies 来做一个完整的 Web 应用程序示例，包括登录网站、存储 SessionID cookie 并在以后的请求中重新提交它.

There's a good example of using NSURLRequest and NSHTTPCookies to do a full web application example of logging into a website, storing the SessionID cookie and resubmitting it in future requests.

NSURLConnection、NSHTTPCookie

来自 logix812:

    NSHTTPURLResponse   * response;
    NSError             * error;
    NSMutableURLRequest * request;
    request = [[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://temp/gomh/authenticate.py?setCookie=1"]
                                            cachePolicy:NSURLRequestReloadIgnoringCacheData 
                                        timeoutInterval:60] autorelease];

    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];  
    NSLog(@"RESPONSE HEADERS: 
%@", [response allHeaderFields]);

    // If you want to get all of the cookies:
    NSArray * all = [NSHTTPCookie cookiesWithResponseHeaderFields:[response allHeaderFields] forURL:[NSURL URLWithString:@"http://temp"]];
    NSLog(@"How many Cookies: %d", all.count);
    // Store the cookies:
    // NSHTTPCookieStorage is a Singleton.
    [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookies:all forURL:[NSURL URLWithString:@"http://temp"] mainDocumentURL:nil];

    // Now we can print all of the cookies we have:
    for (NSHTTPCookie *cookie in all)
        NSLog(@"Name: %@ : Value: %@, Expires: %@", cookie.name, cookie.value, cookie.expiresDate); 


    // Now lets go back the other way.  We want the server to know we have some cookies available:
    // this availableCookies array is going to be the same as the 'all' array above.  We could 
    // have just used the 'all' array, but this shows you how to get the cookies back from the singleton.
    NSArray * availableCookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:[NSURL URLWithString:@"http://temp"]];
    NSDictionary * headers = [NSHTTPCookie requestHeaderFieldsWithCookies:availableCookies];

    // we are just recycling the original request
    [request setAllHTTPHeaderFields:headers];

    request.URL = [NSURL URLWithString:@"http://temp/gomh/authenticate.py"];
    error       = nil;
    response    = nil;

    NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    NSLog(@"The server saw:
%@", [[[NSString alloc] initWithData:data encoding: NSASCIIStringEncoding] autorelease]);

这篇关于带有 Cookie 的 Objective-C 异步 Web 请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！