On Thu, 9 Jun 2022 10:31:31 GMT, Conor Cleary <ccle...@openjdk.org> wrote:
>> **Issue**
>> It was observed that when the httpclient sends a POST request with the
>> `Expect: 100 Continue` header set and the server replies with a response
>> code `417 Expectation Failed` that the httpclient hangs indefinitely when
>> the version of Http used is HTTP/2. However, it was also seen that the issue
>> persisted with HTTP/1_1 with the same usage.
>>
>> This was caused by an implementation in ExchangeImpl that resulted in two
>> calls to readBodyAsync() in this case, where the second call causes the
>> indefinite hanging (as if there was a respomse body, it has already been
>> read).
>>
>> **Solution**
>> When ExchangeImpl::expectContinue() detects that a response code 417 is
>> received, two things occur. Firstly, a flag is set which ensures that the
>> connection is closed locally in this case. Secondly, the response is
>> returned to the client as a failed future, A unit test was added to ensure
>> that this usage of the httpclient does not cause hanging.
>
> Conor Cleary has updated the pull request incrementally with one additional
> commit since the last revision:
>
> 8286171: Added teardown method and comments
test/jdk/java/net/httpclient/ExpectContinueTest.java line 286:
> 284: resp = cf.join();
> 285: System.err.println("Response Headers: " + resp.headers());
> 286: System.err.println("Response Status Code: " + resp.statusCode());
Would be good to add some `assertEquals` here to verify that the status codes
we get are those that we expect. Thanks!
-------------
PR: https://git.openjdk.java.net/jdk/pull/9093
