我应该如何在HttpServlet中记录发送到doPost的HttpServletRequest以便以后回放? [英] How should I record `HttpServletRequest`s that are sent to `doPost` in an `HttpServlet` for later playback?

问题描述

我想将一些请求(类型为 javax.servlet.http.HttpServletRequest )转储到文件中，然后稍后从文件中重播它们，以便我可以测试将来对所做的更改> HttpServlet .最好的方法是什么?

I want to dump some requests (of type javax.servlet.http.HttpServletRequest) into a file and then later replay them from the file, so that I can test future changes to the HttpServlet. What's the best way to accomplish this?

到目前为止，我正在尝试从与请求关联的输入流中提取数据，并将此二进制数据保存到文件中.最终，这可能需要像在每个保存的输入流之前存储字节数之类的东西，以便我知道一个请求在哪里结束而另一个在哪里开始.

So far, I'm trying to pull data out of the input stream associated with the request, and save this binary data into a file. Ultimately, this may require something like storing a byte-count prior to each saved input stream, so that I know where one request ends and the other begins.

有更简单的方法吗?

**澄清一下，这些不是涉及浏览器的请求.到目前为止，没有一个答案可以解决我的特定问题，我认为这可以归结为对HttpServletRequest进行序列化和反序列化.我试过只是从request.getInputStream()返回的输入流中提取字节.不幸的是，如果我将其转换为字符串，则似乎无法通过Message.Builder.mergeFrom(bytes)解析生成的字节.

** to clarify, these are not requests involving a browser. So far none of the answers solves my particular problem, which I suppose boils down to serializing and deserializing an HttpServletRequest. I've tried just pulling the bytes from the input stream returned by request.getInputStream(). Unfortunately, if I turn this into a string, it seems that the resulting bytes cannot be parsed by Message.Builder.mergeFrom(bytes).

我向所有知道如何解决我的问题的人悬赏.

I'm putting up a bounty for anyone who knows how to solve my problem.

推荐答案

在我的特殊情况下，我最终通过使用 CodedOutputStream 编写 com.google.protobuf来解决了该问题.GeneratedMessage (下面的 foo ):

In my particular case, I eventually solved the problem by using a CodedOutputStream to write the com.google.protobuf.GeneratedMessage (foo below):

ByteArrayOutputStream bos = new ByteArrayOutputStream();
CodedOutputStream cos = CodedOutputStream.newInstance(bos);
foo.writeTo(cos);

可以使用 CodedInputStream 将其读取，例如:

This can be read in using a CodedInputStream with something like:

byte[] ba = readBytesFromOutputFile();
CodedInputStream cis = CodedInputStream.newInstance(ba);

然后，可以将 CodedInputStream 传递给消息生成器以完成反序列化.

The CodedInputStream can then be passed to a message builder to complete the deserialization.

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