Is there a better way to handle HTTP error statuses?

iteye_3028

于 2010-05-20 19:04:36 发布

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本文介绍了一段Objective-C代码，用于检查HTTP响应的状态码。如果状态码大于等于400，则取消连接，并通过创建NSError对象来报告错误。

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if ([response respondsToSelector:@selector(statusCode)])
{
    int statusCode = [((NSHTTPURLResponse *)response) statusCode];
    if (statusCode >= 400)
    {
        [connection cancel];  // stop connecting; no more delegate messages
        NSDictionary *errorInfo
          = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:
            NSLocalizedString(@"Server returned status code %d",@""),
            statusCode]
                                        forKey:NSLocalizedDescriptionKey];
        NSError *statusError
          = [NSError errorWithDomain:NSHTTPPropertyStatusCodeKey
                                code:statusCode
                            userInfo:errorInfo];
        [self connection:connection didFailWithError:statusError];
    }
}