Question

我对Objective C很新，甚至更新的网络API，如NSMutableURLRequest和NSURLSession。无论如何，我在调用异步API以POST到HTTPS地址并获取JSON数据包时遇到问题：

我可以从命令行调用curl并成功获取这样的数据包：

curl -X POST -H "Content-Type: application/json" -d '{"name":"foo","pass":"bar"}' --insecure https://bla bla bla.com/xxxx

并获取一个json数据包以响应curl：

"{'key1':'val1','key2':'val2','key3':'val3'}

我想在Objective C中做相同的事情。这就是我到目前为止所做的：

#define USER_URI @"https://bla bla bla.com"
    NSDictionary* gistDict = [NSDictionary dictionaryWithObjectsAndKeys:
                              username, @"name",
                              password, @"pass", nil];
    NSError* jsonError;
    NSData* jsonData = [NSJSONSerialization dataWithJSONObject:gistDict options: NSJSONWritingPrettyPrinted error: &jsonError];

    NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString: USER_URI]];
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:jsonData];

    NSURLSession* session      = [NSURLSession sharedSession];
    NSURLSessionDataTask* task = [session dataTaskWithRequest:request completionHandler: ^(NSData* data, NSURLResponse* response, NSError* error) {
        NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse *)response;
        BOOL success = data && httpResponse.statusCode == 200;

        if (success) {
            NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: nil];
            NSLog(@"json dict %@", jsonDictionary);
        } 
    }];

问题出在运行时：数据为0字节，响应为零。块参数error返回一条消息：

Error Domain=NSURLErrorDomain Code=-1202 "The operation couldn’t be completed.

这是因为我要发布到HTTPS网址而不是HTTP网址吗？

Objective C HTTPS请求失败？

0 个答案: