同步的HTTP请求

代码：

#import <Foundation/Foundation.h>

void request(NSString *urlString)
{
    NSLog(@"BEGIN");
    // make request object
    NSURL *url = [[NSURL alloc]initWithString:urlString];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:url];
    [request setHTTPMethod:@"GET"];
    [request setTimeoutInterval:];

    // send request
    NSError *error = nil;
    NSHTTPURLResponse *urlResponse = nil;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];

    if ([urlResponse statusCode] >=  && [urlResponse statusCode] < ) {
        NSString *responseText = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
        NSLog(@"OK");
    }

    NSLog(@"END");
}

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        request(@"http://www.code-style.com");
    }
    return ;
}