RFR: 8307648: java/net/httpclient/ExpectContinueTest.java timed out [v2]

[Daniel Fuchs]

> Please find here a fix for the java/net/httpclient/ExpectContinueTest.java which was failing intermittently.
> 
> It turns out there was two bugs here:
> 
> - on on the server side, which added the END_STREAM flag to the HeaderFrame containing the 100 response.
>   This can obviously never be right since 100 is an intermediary response, which should be followed by a final response.
>   
> - on the client side, because this was interpreted as "there will be no body" - but it didn't prevent the client from waiting for the final response.
> 
> With this fix a 100 response carrying the END_STREAM flag will cause the exchange to be cancelled. I manually verified that this worked before fixing the server side.
> 
> The logic on server side is fixed to ignore whatever length is passed to sendResponseHeaders() if 100 is supplied, and to not add the END_STREAM flag to the HeaderFrame that carries the 100 response (which is a side effect of setting the expected length parameter to 0 in that case).

Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:

  A HEADERS frame with the END_STREAM flag set that carries an informational status code is malformed

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14207/files
  - new: https://git.openjdk.org/jdk/pull/14207/files/1ca3000c..f046291f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14207&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14207&range=00-01

  Stats: 11 lines in 1 file changed: 5 ins; 1 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/14207.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14207/head:pull/14207

PR: https://git.openjdk.org/jdk/pull/14207