AsyncSocket WHOIS连接

Question

我正在尝试使用GCDAsyncSocket连接到WHOIS服务器(com.whis-servers.net:43)。我可以连接并写入服务器，然后调用didWriteDataWithTag:，但是没有数据。WHOIS服务器确实发送了一个响应，但我无法读取它。

NSLog(@"Connecting to \"%@\" on port %hu...", host, port);
    self.viewController.label.text = @"Connecting...";

    NSError *error = nil;
    if (![asyncSocket connectToHost:@"com.whois-servers.net" onPort:43 error:&error])
    {
        DDLogError(@"Error connecting: %@", error);
        self.viewController.label.text = @"Oops";
    }

    NSString *requestStr = [NSString stringWithFormat:@"domain google.com\r\n\r\n"];
    NSData *requestData = [requestStr dataUsingEncoding:NSUTF8StringEncoding];

    [asyncSocket writeData:requestData withTimeout:-1 tag:0];
    [asyncSocket readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1 tag:0];

这是didReadData:

- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
    DDLogInfo(@"socket:%p didReadData:withTag:%d", sock, tag);
    NSString *response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

    NSLog(@"Data: %i", [data length]);
}

帮忙？！

Answer 1

我在使用AsyncSocket时遇到了同样的问题。我从来没有完全解决它，但找到了一个接近的解决方案。

在onSocket:willDisconnectWithError (GapSocketCommand.m)中，可以通过调用unreadData来获取连接失败时的当前缓冲区。

- (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err
{
NSLog(@"onSocket:willDisconnectWithError %@",err);
NSData * unreadData = [sock unreadData]; // ** This gets the current buffer

if(unreadData) {
    [self onSocket:sock didReadData:unreadData withTag:NULL]; // ** Return as much data that could be collected
} else {
    NSString* jsString = [[NSString alloc] initWithFormat:@"GapSocket.__onError(\"%d\",\"%@\");"
                      ,[sock userData]
                      ,[err localizedDescription] ];
    [self.webView stringByEvaluatingJavaScriptFromString:jsString];
    //[jsString release];
}
}

您必须修改它以应用于GCDAsyncSocket，但解决方案应该是相同的。