org.springframework.web.servlet.config.annotation

Class ContentNegotiationConfigurer

java.lang.Object

org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer

public class ContentNegotiationConfigurer
extends Object

Creates a ContentNegotiationManager and configures it with one or more ContentNegotiationStrategy instances.

This factory offers properties that in turn result in configuring the underlying strategies. The table below shows the property names, their default settings, as well as the strategies that they help to configure:

Property Setter	Default Value	Underlying Strategy	Enabled Or Not
favorPathExtension(boolean)	true	PathExtensionContentNegotiationStrategy	Enabled
favorParameter(boolean)	false	ParameterContentNegotiationStrategy	Off
ignoreAcceptHeader(boolean)	false	HeaderContentNegotiationStrategy	Enabled
defaultContentType(org.springframework.http.MediaType...)	null	FixedContentNegotiationStrategy	Off
defaultContentTypeStrategy(org.springframework.web.accept.ContentNegotiationStrategy)	null	ContentNegotiationStrategy	Off

As of 5.0 you can set the exact strategies to use via strategies(List).

Note: if you must use URL-based content type resolution, the use of a query parameter is simpler and preferable to the use of a path extension since the latter can cause issues with URI variables, path parameters, and URI decoding. Consider setting favorPathExtension(boolean) to false or otherwise set the strategies to use explicitly via strategies(List).

Since:

3.2

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
ContentNegotiationConfigurer(ServletContext servletContext) Class constructor with ServletContext.

Method Summary

Modifier and Type	Method and Description
protected ContentNegotiationManager	buildContentNegotiationManager() Build a ContentNegotiationManager based on this configurer's settings.
ContentNegotiationConfigurer	defaultContentType(MediaType... defaultContentTypes) Set the default content type(s) to use when no content type is requested in order of priority.
ContentNegotiationConfigurer	defaultContentTypeStrategy(ContentNegotiationStrategy defaultStrategy) Set a custom ContentNegotiationStrategy to use to determine the content type to use when no content type is requested.
ContentNegotiationConfigurer	favorParameter(boolean favorParameter) Whether a request parameter ("format" by default) should be used to determine the requested media type.
ContentNegotiationConfigurer	favorPathExtension(boolean favorPathExtension) Whether the path extension in the URL path should be used to determine the requested media type.
ContentNegotiationConfigurer	ignoreAcceptHeader(boolean ignoreAcceptHeader) Whether to disable checking the 'Accept' request header.
ContentNegotiationConfigurer	ignoreUnknownPathExtensions(boolean ignore) Whether to ignore requests with path extension that cannot be resolved to any media type.
ContentNegotiationConfigurer	mediaType(String extension, MediaType mediaType) Add a mapping from a key, extracted from a path extension or a query parameter, to a MediaType.
ContentNegotiationConfigurer	mediaTypes(Map<String,MediaType> mediaTypes) An alternative to mediaType(java.lang.String, org.springframework.http.MediaType).
ContentNegotiationConfigurer	parameterName(String parameterName) Set the query parameter name to use when favorParameter(boolean) is on.
ContentNegotiationConfigurer	replaceMediaTypes(Map<String,MediaType> mediaTypes) Similar to mediaType(java.lang.String, org.springframework.http.MediaType) but for replacing existing mappings.
void	strategies(List<ContentNegotiationStrategy> strategies) Set the exact list of strategies to use.
ContentNegotiationConfigurer	useJaf(boolean useJaf) Deprecated. as of 5.0, in favor of useRegisteredExtensionsOnly(boolean) which has reverse behavior
ContentNegotiationConfigurer	useRegisteredExtensionsOnly(boolean useRegisteredExtensionsOnly) When favorPathExtension is set, this property determines whether to use only registered MediaType mappings to resolve a path extension to a specific MediaType.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContentNegotiationConfigurer

public ContentNegotiationConfigurer(@Nullable
                                    ServletContext servletContext)

Class constructor with ServletContext.

Method Detail

strategies

public void strategies(@Nullable
                       List<ContentNegotiationStrategy> strategies)

Set the exact list of strategies to use.

Note: use of this method is mutually exclusive with use of all other setters in this class which customize a default, fixed set of strategies. See class level doc for more details.

Parameters:

strategies - the strategies to use

Since:

5.0

favorPathExtension

public ContentNegotiationConfigurer favorPathExtension(boolean favorPathExtension)

Whether the path extension in the URL path should be used to determine the requested media type.

By default this is set to true in which case a request for /hotels.pdf will be interpreted as a request for "application/pdf" regardless of the 'Accept' header.

mediaType

public ContentNegotiationConfigurer mediaType(String extension,
                                              MediaType mediaType)

Add a mapping from a key, extracted from a path extension or a query parameter, to a MediaType. This is required in order for the parameter strategy to work. Any extensions explicitly registered here are also whitelisted for the purpose of Reflected File Download attack detection (see Spring Framework reference documentation for more details on RFD attack protection).

The path extension strategy will also try to use ServletContext.getMimeType(java.lang.String) and MediaTypeFactory to resolve path extensions. To change this behavior see the useRegisteredExtensionsOnly(boolean) property.

Parameters:

extension - the key to look up

mediaType - the media type

See Also:

mediaTypes(Map), replaceMediaTypes(Map)

mediaTypes

public ContentNegotiationConfigurer mediaTypes(@Nullable
                                               Map<String,MediaType> mediaTypes)

An alternative to mediaType(java.lang.String, org.springframework.http.MediaType).

See Also:

mediaType(String, MediaType), replaceMediaTypes(Map)

replaceMediaTypes

public ContentNegotiationConfigurer replaceMediaTypes(Map<String,MediaType> mediaTypes)

Similar to mediaType(java.lang.String, org.springframework.http.MediaType) but for replacing existing mappings.

See Also:

mediaType(String, MediaType), mediaTypes(Map)

ignoreUnknownPathExtensions

public ContentNegotiationConfigurer ignoreUnknownPathExtensions(boolean ignore)

Whether to ignore requests with path extension that cannot be resolved to any media type. Setting this to false will result in an HttpMediaTypeNotAcceptableException if there is no match.

By default this is set to true.

useJaf

@Deprecated
public ContentNegotiationConfigurer useJaf(boolean useJaf)

Deprecated. as of 5.0, in favor of useRegisteredExtensionsOnly(boolean) which has reverse behavior

When favorPathExtension(boolean) is set, this property determines whether to allow use of JAF (Java Activation Framework) to resolve a path extension to a specific MediaType.

useRegisteredExtensionsOnly

public ContentNegotiationConfigurer useRegisteredExtensionsOnly(boolean useRegisteredExtensionsOnly)

When favorPathExtension is set, this property determines whether to use only registered MediaType mappings to resolve a path extension to a specific MediaType.

By default this is not set in which case PathExtensionContentNegotiationStrategy will use defaults if available.

favorParameter

public ContentNegotiationConfigurer favorParameter(boolean favorParameter)

Whether a request parameter ("format" by default) should be used to determine the requested media type. For this option to work you must register media type mappings.

By default this is set to false.

See Also:

parameterName(String)

parameterName

public ContentNegotiationConfigurer parameterName(String parameterName)

Set the query parameter name to use when favorParameter(boolean) is on.

The default parameter name is "format".

ignoreAcceptHeader

public ContentNegotiationConfigurer ignoreAcceptHeader(boolean ignoreAcceptHeader)

Whether to disable checking the 'Accept' request header.

By default this value is set to false.

defaultContentType

public ContentNegotiationConfigurer defaultContentType(MediaType... defaultContentTypes)

Set the default content type(s) to use when no content type is requested in order of priority.

If destinations are present that do not support any of the given media types, consider appending MediaType.ALL at the end.

By default this is not set.

See Also:

defaultContentTypeStrategy(org.springframework.web.accept.ContentNegotiationStrategy)

defaultContentTypeStrategy

public ContentNegotiationConfigurer defaultContentTypeStrategy(ContentNegotiationStrategy defaultStrategy)

Set a custom ContentNegotiationStrategy to use to determine the content type to use when no content type is requested.

By default this is not set.

Since:

4.1.2

See Also:

defaultContentType(org.springframework.http.MediaType...)

buildContentNegotiationManager

protected ContentNegotiationManager buildContentNegotiationManager()

Build a ContentNegotiationManager based on this configurer's settings.

Since:

4.3.12

See Also:

ContentNegotiationManagerFactoryBean.getObject()