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[Source] Spring Cloud Filter fetches the requested content via the ContentCachingRequestWrapper

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Posted on 8/9/2021 2:18:46 PM | | | |
Requirements: Record the request content of the interface into the log, which refers to the content submitted by POST, PUT, Delete, etc., and the content can be a form or a json string.

Anyone with some experience knows that if we read the flow of HttpServletRequest or HttpServletResponse in the filter, there is no way to read it again, which will cause the request to be exceptional. Therefore, we need to use the ContentCachingRequestWrapper and ContentCachingRequestWrapper provided by Spring to repeat the reads of the data stream.
Let's take a look at the renderings first, as follows:



To determine whether a request contains the request content information, the code is as follows (Excluded "multipart/form-data" file submissions）：

Get the requested content information:

Filter code:


Note:After calling the chain.doFilter method, you can get the requested contentThe principle is that when the controller gets the InputStream, the ContentCachingRequestWrapper will cache the content into a variable.

The hyperlink login is visible.
The hyperlink login is visible.


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 Landlord| Posted on 8/9/2021 2:27:30 PM |
Read the stream and read the response code:



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