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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Tomcat 8.5.5 and GZIP Post Request
Date Thu, 12 Jan 2017 17:01:35 GMT
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Johan,

On 1/11/17 12:25 PM, Johan Basson wrote:
> I have a C++ client posting a json payload to Tomcat. The payload
> is GZIP encoded and the request is send in chunks. I have added a
> GZIP Filter to my application which wrappes the ServletInputStream
> into a GZIPInputStream.
> 
> The request spans multiple packets, so I'm getting only partial
> content. Do I need to buffer the request content until all the
> content has been received or does Tomcat do It for you?
> 
> The compressed payload is 42K spread over 3 requests.
> 
> Technical Details:
> 
> Tomcat: 8.5.5 Server OS: Linux
> 
> Client Request Headers:
> 
> Content-Type:application/json Transfer-Encoding: identity 
> Content-Encoding: gzip Content-Length: 41608 Accept:
> application/json Expect: 100-continue

Okay, so you are non-chunked-encoding (there is a Content-Length) with
a gzip Content-Encoding. You shouldn't have to unwrap this request at
all. If you do this:

byte[] buffer = new byte[4096];
InputStream in = request.getInputStream();
int count = in.read(buffer);

Then the bytes in the buffer should be your actual JSON. There
shouldn't be any reason to gunzip the data a second time.

- -chris
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