Prior to this commit, an bug introduced in SPR-16949 prevented
`Mono.empty` bodies from being written to the response.
This commit ensures that empty bodies still trigger the writing to the
response and does not hang the processing of the exchange.
Issue: SPR-17220
Cherry-picked from: 280da61d5c
Empty Maps are preferably initialized without capacity (not initializing them at all or lazily initializing with default capacity when needed).
Issue: SPR-17105
(cherry picked from commit 4a147d26fc)
Since SPR-15205, the `FormHttpMessageConverter` is adding a `charset`
directive to the `Content-Type` request header in order to help servers
understand which charset is being used to encode headers of each part.
As reported in SPR-17030 and others, some servers are not parsing
properly such header values and assume that `boundary` is the last
directive in the `Content-Type` header.
This commit reorders the charset information right before the boundary
declaration to get around those issues.
Issue: SPR-17030
(Cherry-picked from 390bb871d8)
See Javadoc on UriComponentsBuilder#uriVariables for details.
This helps to prepare for SPR-17027 where the MvcUriComponentsBuilder
already does a partial expand but was forced to build UriComonents
and then create a new UriComponentsBuilder from it to continue. This
change makes it possible to stay with the same builder instance.
Issue: SPR-17027
After the latest changes, two small fixes in the clone method to copy
the encode flag, and in the encodeUriTemplate method to account for
possible null query params.
Improvements in the URI encoding section.
Issue: SPR-17039, SPR-17027
LinkedList remains in place where a List is likely to remain empty or single-element (in order to avoid unused capacity).
Issue: SPR-17037
(cherry picked from commit 9c08a48)
The ability to request to encode before `build()`, and more importantly
before expanding, allows stricter encoding to be applied to URI vars
and consequently to neutralize the effect of characters with reserved
meaning in a URI.
Issue: SPR-17039
- hooks to check expired sessions in both create and retrieve.
- maxSessions limit on the total number of sessions.
- getSessions method for management purposes
- removeExpiredSessions public API
Issue: SPR-17020, SPR-16713
Includes specific fine-tuning of ProtobufHttpMessageConverter and JAXB2 based message converters, as well as revised javadoc for abstract base classes.
Issue: SPR-16995
In SPR-16892, the `EncoderHttpMessageWriter` has been improved to write
`"Content-Length"` HTTP response headers if the response body is of type
`Mono` (i.e. the actual content length is easily accessible without
buffering a possibly large response body). That change was relying on
the fact that the server side is using a `ChannelSendOperator` to delay
the writing of the body until the first signal is received.
This strategy is not effective on the client side, since no such channel
operator is used for `WebClient`. This commit improves
`EncoderHttpMessageWriter` and delays, for `Mono` HTTP message bodies
only, the writing of the body so that we can write the
`"Content-Length"` header information once we've got the body resolved.
Issue: SPR-16949
(Cherry-picked from 4a26f93a0d)
Rossen Stoyanchev