On Sun, 3 Sep 2023 09:16:24 GMT, Vyom Tewari <[email protected]> wrote:

>> With the current implementation of HttpURLConnection  if server rejects the  
>> “Expect 100-continue” then there will be ‘java.net.ProtocolException’ will 
>> be thrown from 'expect100Continue()' method. 
>> 
>> After the exception thrown, If we call any other method on the same instance 
>> (ex getHeaderField(), or getHeaderFields()). They will internally call 
>> getOuputStream() which invokes writeRequests(), which make the actual server 
>> call.
>> 
>> The code change will sets the existing variable ‘rememberedException’ when 
>> there is exception and getOutputStream0() will re-throw 
>> ‘rememberedException’  if the ‘rememberedException’ is not null. 
>> 
>> Note: getOutputStream0() also call’s  ‘expect100Continue()’  if 
>> ‘expectContinue’ is true.
>
> Vyom Tewari has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   modified the junit tests names

I am concerned that you are reusing the `rememberedException` field, which is 
used by getInputStream().
A server doesn't need to read the request body if it doesn't need it to send 
the response. So it could close the socket input and write the response body. 
The interaction between getOutputStream and getInputStream makes me uneasy 
here. I believe you may need to add more tests where the server doesn't read 
the request body before replying, and check that you can still read the 
response - for instance, it could be 404 with some text, and you shouldn't get 
an exception when reading the response body.

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PR Comment: https://git.openjdk.org/jdk/pull/15483#issuecomment-1721468032

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