iPhone开发:通过NSURLRequest获得服务器返回的http header和http status

来源：互联网发布：linux下解压war包编辑：程序博客网时间：2024/06/06 08:51

同步访问时的取法

NSURL *url = [NSURL URLWithString:@"http://www.test.com"];
NSURLRequest *request = [NSURLRequest requestWithURL: url];
NSHTTPURLResponse *response;
[NSURLConnection sendSynchronousRequest: request returningResponse: &response error: nil];
if ([response respondsToSelector:@selector(allHeaderFields)]) {
    // 取得所有的请求的头
    NSDictionary *dictionary = [response allHeaderFields];
    NSLog([dictionary description]);
    // 取得http状态码
    NSLog(@"%d",[response statusCode]);

}

异步访问时则要实现委托的一个方法

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    // 注意这里将NSURLResponse对象转换成NSHTTPURLResponse对象才能去
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;
    if ([response respondsToSelector:@selector(allHeaderFields)]) {
        NSDictionary *dictionary = [httpResponse allHeaderFields];
        NSLog([dictionary description]);
        NSLog(@"%d",[response statusCode]);

    }
}