始终取回NSURLSessionDataTask中的缓存数据 [英] Always getting back cached data in NSURLSessionDataTask

问题描述

使用NSURLSessionDataTask向服务器发布JSON请求时，我面临一个非常奇怪的问题.

I'm facing a very strange issue when using NSURLSessionDataTask to post a JSON request to the server.

第一个请求通过，我收到正确的JSON响应，当我执行第二个请求时，我总是返回旧的响应，而服务器从未收到该请求.即使我打开飞行模式，NSURLSessionDataTask确实可以正常工作，但我又恢复了原来的响应.

The first request goes through and I receive the correct JSON response, when I do a second request I'm getting always back the old response and the server never receives the request. Even if I turn on airplane mode the NSURLSessionDataTask does work an I get back the old response again.

那是我正在使用的代码:

That's the code I'm using:

- (void)getJSONFromURL:(NSURL*)url identifierCode:(NSInteger)code
{
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request addValue:[DataController sharedInstance].currentUser.userToken forHTTPHeaderField:@"User-Token"];
[request setHTTPMethod:@"GET"];

if (![SVProgressHUD isVisible])
    [SVProgressHUD show];

NSURLSessionDataTask *postTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error){
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;
    NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];

    [self handleResponse:httpResponse withJSON:json identifierCode:code];

    dispatch_async(dispatch_get_main_queue(), ^{
        [SVProgressHUD dismiss];
    });
}];

[postTask resume];

}

推荐答案

我已经找到了问题，我不知道为什么会有所改变，因为我以前从未设置过该属性.无论如何，我设置了configuration.URLCache = NULL;，现在一切正常.

I've found the issue, I don't know why this has changed, because I never had to set that property before. Anyway I set configuration.URLCache = NULL; and now everthing works fine again.

这篇关于始终取回NSURLSessionDataTask中的缓存数据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！