http - Netty - 访问分块 HTTP 请求的内容 (LittleProxy)

Question

我正在用 LittleProxy 拦截一个 HTTP 请求它使用 Netty。但是，现在我想拦截一个明显使用分块传输编码的网络服务请求。

HTTP header 如下所示

Content-Type -> text/xml; charset=UTF-8
Host -> 192.168.56.1:7897
SOAPAction -> "getSymbols"
Transfer-Encoding -> chunked
User-Agent -> Axis2
Via -> 1.1.tvmbp

如何访问内容？我试过将 httpChunkAggregator 添加到 littleproxy 代码中的某个管道，但没有用。

Answer 1

您需要在 HttpFiltersSourceAdapter 中覆盖这两个方法。返回一个非零缓冲区大小。 LittleProxy 将自动聚合 httpRequest 和 httpContent 并包装到 AggregatedFullHttpRequest 中，允许转换为 httpContent。

@Override
public int getMaximumRequestBufferSizeInBytes() {
    return 1024 * 1024;
}

@Override
public int getMaximumResponseBufferSizeInBytes() {
    return 1024 * 1024 * 2;
}

然后就可以克隆并读取HTTP包中的内容了:

String cloneAndExtractContent(HttpObject httpObject, Charset charset){
    List<Byte> bytes = new ArrayList<Byte>();
    HttpContent httpContent = (HttpContent) httpObject;
    ByteBuf buf = httpContent.content();
    byte[] buffer = new byte[buf.readableBytes()];
    if(buf.readableBytes() > 0) {
        int readerIndex = buf.readerIndex();
        buf.getBytes(readerIndex, buffer);
    }
    for(byte b : buffer){
        bytes.add(b);
    }
    return new String(Bytes.toArray(bytes), charset);
}


@Override
public HttpResponse clientToProxyRequest(HttpObject httpObject) {
     System.out.println("clientToProxyRequest - to -> "+getRequestUrl());
     System.out.println(cloneAndExtractContent(httpObject, StandardCharsets.UTF_8));

     return null;
}


@Override
public HttpObject serverToProxyResponse(HttpObject httpObject)
{
      System.out.println("serverToProxyResponse <- from - "+getRequestUrl());
      System.out.println(cloneAndExtractContent(httpObject, StandardCharsets.UTF_8));

      return httpObject;
}