This commit ensures that the FormHttpMessageConverter no longer supports
reading Maps (just MultiValueMaps). Plain maps are often used to
represent JSON.
See gh-32826
This commit changes the FormHttpMessageConverter from a
HttpMessageConverter<MultiValueMap<String, ?>> to a
HttpMessageConverter<Map<String, ?>>, so that normal, single-value maps
can also be used as form representation, both for reading and writing.
Closes gh-32826
This commit allows to extend the `ServerHttpObservationFilter` when the
observation scope is opened. This typically allows to add the current
traceId as a response header.
Closes gh-30632
Prior to this commit, `@ExceptionHandler` annotated controller methods
could be mapped using the exception type declaration as an annotation
attribute, or as a method parameter.
While such methods support a wide variety of method arguments and return
types, it was not possible to declare the same exception type on
different methods (in the same controller/controller advice).
This commit adds a new `produces` attribute on `@ExceptionHandler`; with
that, applications can vary the HTTP response depending on the exception
type and the requested content-type by the client:
```
@ExceptionHandler(produces = "application/json")
public ResponseEntity<ErrorMessage> handleJson(IllegalArgumentException exc) {
return ResponseEntity.badRequest().body(new ErrorMessage(exc.getMessage(), 42));
}
@ExceptionHandler(produces = "text/html")
public String handle(IllegalArgumentException exc, Model model) {
model.addAttribute("error", new ErrorMessage(exc.getMessage(), 42));
return "errorView";
}
```
This commit implements support in both Spring MVC and Spring WebFlux.
Closes gh-31936
Prior to this commit, HTTP requests sent with the
`HttpComponentsClientHttpRequestFactory` would not set a
"Content-Length" header for empty request bodies. Setting a request
entity is the expected behavior for unsafe HTTP methods, and this would
align the behavior with other HTTP clients.
Developers would often rely on `BufferingClientHttpRequestFactory` to
set this information on the request.
This commit ensures that a `NullEntity` is used for unsafe HTTP methods,
when no body has been set for the request. This result in a
"Content-Length:0" request header.
Fixes gh-32678
Prior to this commit, `RestClientException` thrown by status handlers
would not be registered as observation errors. This commit ensures that
such exceptions are first caught, registered in the observation and
rethrown as expected.
Closes gh-32575
Prior to this commit, the `RestClient` observations would be stopped as
soon as the exchange function was called. This means that all errors
related to response decoding or mapping would not be recorded by the
obsevations.
This commit extends the observation recording to the `ResponseSpec` DSL
calls as well as custom exchange functions.
Fixes gh-32575
Prior to this commit, `HttpHeaders#setContentLength` would accept
negative values. Those are not allowed by the RFC and the headers
implementation only uses "-1" as a way to convey that no value was set.
This commit ensures that negative values are rejected.
Fixes gh-32660
Prior to this commit, the `BufferingClientHttpRequestFactory`, through
the `AbstractBufferingClientHttpRequest`, would set a "Content-Length"
header value, even if the buffered body was empty.
This behavior is invalid since no request body would be set by the
client code in the first place.
This commit ensures that this header is only set if a request body has
been buffered and is about to be written to the request.
Fixes gh-32650
This commit introduces a new URL parser based on algorithm provided in
the Living URL standard. This new UrlParser is used by
UriComponentsBuilder::fromUriString, replacing the regular expressions.
Closes gh-32513
Prior to this commit, `BufferingClientHttpRequestWrapper` would always
write to the actual client request body, even if the buffered content
was empty (empty byte array).
This would cause issues with specific client request factories,
especially the OkHttp variant, that would consider empty byte arrays as
non-empty body and would reject such cases for GET requests with an
"IllegalArgumentException: method GET must not have a request body".
This commit only writes to the request if the buffered content is not
empty.
Fixes gh-32612
