This change removes the `MultiValueMap` nature of `HttpHeaders`, since
it inherits APIs that do not align well with underlying server
implementations. Notably, methods that allows to iterate over the whole
collection of headers are susceptible to artificially introduced
duplicates when multiple casings are used for a given header, depending
on the underlying implementation.
This change includes a dedicated key set implementation to support
iterator-based removal, and either keeps map method implementations that
are relevant or introduces header-focused methods that have a similar
responsibility (like `hasHeaderValues(String, List)` and
`containsHeaderValue(String, String)`).
In order to nudge users away from using an HttpHeaders as a Map, the
`asSingleValueMap` view is deprecated. In order to offer an escape
hatch to users that do make use of the `MultiValueMap` API, a similar
`asMultiValueMap` view is introduced but is immediately marked as
deprecated.
This change also adds map-like but header-focused assertions to
`HttpHeadersAssert`, since it cannot extend `AbstractMapAssert` anymore.
Closes gh-33913
This commit updates the whole Spring Framework codebase to use JSpecify
annotations instead of Spring null-safety annotations with JSR 305
semantics.
JSpecify provides signficant enhancements such as properly defined
specifications, a canonical dependency with no split-package issue,
better tooling, better Kotlin integration and the capability to specify
generic type, array and varargs element null-safety. Generic type
null-safety is not defined by this commit yet and will be specified
later.
A key difference is that Spring null-safety annotations, following
JSR 305 semantics, apply to fields, parameters and return values,
while JSpecify annotations apply to type usages. That's why this
commit moves nullability annotations closer to the type for fields
and return values.
See gh-28797
StandardWebSocketUpgradeStrategy is the common replacement on Tomcat, Undertow and all EE servers. JettyRequestUpgradeStrategy remains the preferred choice on Jetty.
Closes gh-33744
Since Joda-Time support was removed in Spring Framework 6.0, this commit
removes obsolete mentions of Joda-Time in the reference guide and Javadoc.
See gh-27426
Closes gh-33881
Prior to this commit, the SockJs server support would use
`java.util.Random` to send a random value to clients when they request
the `/info` endpoint. Per protocol, clients can use this value as a
source of entropy for generating a random session id.
In practice, this is not used by clients. For example, the SockJS
javascript client is using a cryptographically safe API to generate
session ids.
While this has no concrete effect on known clients, this commit improves
the random source in the server support by switching to
`java.security.SecureRandom`.
Closes gh-33632
This provides an implementation of an HTTP Handler Adapter that is coded
directly to the Eclipse Jetty core API, bypassing any servlet
implementation.
This includes a Jetty implementation of the spring `WebSocketClient`
interface, `JettyWebSocketClient`, using an explicit dependency to the
jetty-websocket-api.
Closes gh-32097
Co-authored-by: Lachlan Roberts <lachlan@webtide.com>
Co-authored-by: Arjen Poutsma <arjen.poutsma@broadcom.com>
