Java LittleProxy(在 Netty 之上): How to access the POST Body data?

Question

我按照 GitHub:LittleProxy 所示的简单示例进行操作并在 clientToProxyRequest(HttpObject httpObject) 方法中添加了以下内容。

public HttpResponse clientToProxyRequest(HttpObject httpObject)
{
  if(httpObject instanceof DefaultHttpRequest)
  {
    DefaultHttpRequest httpRequest = (DefaultHttpRequest)httpObject;
    logger.info(httpRequest.getUri());          
    logger.info(httpRequest.toString());

    // How to access the POST Body data?            
    HttpPostRequestDecoder d = new HttpPostRequestDecoder(httpRequest);
    d.getBodyHttpDatas();   //NotEnoughDataDecoderException
  }
  return null;
} 

记录器报告了这一点，IMO 只有这两个 header 与此处相关。这是一个 POST 请求，并且有内容...

POST http://www.... HTTP/1.1
Content-Length: 522

查看 Netty API 文档，HttpPostRequestDecoder 似乎很有前途，但我得到了 NotEnoughDataDecoderException。在 Netty JavaDoc写的是这样，但不知道如何提供数据？

This getMethod returns a List of all HttpDatas from body. If chunked, all chunks must have been offered using offer() getMethod. If not, NotEnoughDataDecoderException will be raised.

事实上，我也不确定这是否是在代理中获取 POST 数据的正确方法。

Answer 1

尝试将其添加到您的HttpFiltersSourceAdapter中以避免NotEnoughDataDecoderException:

@Override
public int getMaximumRequestBufferSizeInBytes() {
    return 1048576; 
}

1048576 这里是聚合内容的最大长度。请参阅POSTing data to netty with Apache HttpClient .

这将启用内容的解压缩和聚合，请参阅org.littleshoot.proxy.impl.ClientToProxyConnection中的源代码:

// Enable aggregation for filtering if necessary
int numberOfBytesToBuffer = proxyServer.getFiltersSource()
            .getMaximumRequestBufferSizeInBytes();
if (numberOfBytesToBuffer > 0) {
    aggregateContentForFiltering(pipeline, numberOfBytesToBuffer);
}