This change uses a ChannelInterceptor (inserted at index 0) to detect
when a DISCONNECT message is precluded from being sent on the
clientInboundChannel. This can happen if another interceptor allows
a runtime exception out from preSend or returns false.
It is crucial for such messages to be processed, so when detected
they're processed still.
Issue: SPR-12218
This commit ensures that single quotes nested in double quotes in
code examples in the reference manual are properly escaped using ''.
Issue: SPR-12246
WebSocket clients going away is an expected and common occurance.
Logging at ERROR level on failure to close a connection or on failures
to write data to a WebSocket sessions has a high potential for false
positives with very little to do. This change lowers the log level for
a number of log messages that fit this category.
This should be helped by the effort already spent for 4.1 to ensure
logging at DEBUG level doesn't produce excessive amounts of logging.
Issue: SPR-12155
Refine the logic introduced in commit 71c6eb2b so that additional
imported @Configuration classes are not considered as candidates if
they have already been parsed.
Issue: SPR-12233
Prior to this commit, the `ProtobufHttpMessageConverter` would call
`outputMessage.getBody()` at the beginning of the `writeInternal`
method, thus writing HTTP headers. Since this method is trying to write
"x-protobuf" headers after that, protobuf support wasn't working
properly for the default "x-protobuf" media type.
Thanks Toshiaki Maki for the repro project!
Also fixed:
* improve `MockHttpOutputMessage` behavior to reproduce the read-only
state of HTTP headers once they've been written.
Issue: SPR-12229
Update PathMatchingResourcePatternResolver to include additional
protected methods that can be used by subclasses to optimize which
JARs are searched.
Issue: SPR-12231
Update SystemEnvironmentPropertySource to attempt optimized Map lookups
first, and only fall-back to the defensive SecurityManager safe-mode
if these fail.
Issue: SPR-12224
Juergen Hoeller
Sam Brannen
Rossen Stoyanchev
Phillip Webb
Brian Clozel
Sebastien Deleuze