Package org.springframework.web.filter.reactive

Class HiddenHttpMethodFilter

java.lang.Object

org.springframework.web.filter.reactive.HiddenHttpMethodFilter

All Implemented Interfaces:

WebFilter

public class HiddenHttpMethodFilter
extends Object
implements WebFilter

Reactive WebFilter that converts posted method parameters into HTTP methods, retrievable via HttpRequest.getMethod(). Since browsers currently only support GET and POST, a common technique is to use a normal POST with an additional hidden form field (_method) to pass the "real" HTTP method along. This filter reads that parameter and changes the HttpRequest.getMethod() return value using ServerWebExchange.mutate().

The name of the request parameter defaults to _method, but can be adapted via the methodParamName property.

Since:

5.0

Author:

Greg Turnquist, Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DEFAULT_METHOD_PARAMETER_NAME	Default name of the form parameter with the HTTP method to use.

Constructor Summary

Constructors

Constructor	Description
HiddenHttpMethodFilter()

Method Summary

Modifier and Type	Method	Description
reactor.core.publisher.Mono<Void>	filter(ServerWebExchange exchange, WebFilterChain chain)	Transform an HTTP POST into another method based on methodParamName.
void	setMethodParamName(String methodParamName)	Set the name of the form parameter with the HTTP method to use.

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_METHOD_PARAMETER_NAME

public static final String DEFAULT_METHOD_PARAMETER_NAME

Default name of the form parameter with the HTTP method to use.

See Also:

• Constant Field Values

Constructor Details

HiddenHttpMethodFilter

public HiddenHttpMethodFilter()

Method Details

setMethodParamName

public void setMethodParamName(String methodParamName)

Set the name of the form parameter with the HTTP method to use.

By default this is set to "_method".

filter

public reactor.core.publisher.Mono<Void> filter(ServerWebExchange exchange,
 WebFilterChain chain)

Transform an HTTP POST into another method based on methodParamName.

Specified by:

filter in interface WebFilter

Parameters:

exchange - the current server exchange

chain - provides a way to delegate to the next filter

Returns:

Mono<Void> to indicate when request processing is complete