public class HiddenHttpMethodFilter extends OncePerRequestFilter
Filter
that converts posted method parameters into HTTP methods,
retrievable via HttpServletRequest.getMethod()
. Since browsers currently only
support GET and POST, a common technique - used by the Prototype library, for instance -
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 HttpServletRequestWrapper.getMethod()
return value accordingly.
The name of the request parameter defaults to _method
, but can be
adapted via the methodParam
property.
NOTE: This filter needs to run after multipart processing in case of a multipart
POST request, due to its inherent need for checking a POST body parameter.
So typically, put a Spring MultipartFilter
before this HiddenHttpMethodFilter in your web.xml
filter chain.
Modifier and Type | Field and Description |
---|---|
static String |
DEFAULT_METHOD_PARAM
Default method parameter:
_method |
ALREADY_FILTERED_SUFFIX
logger
Constructor and Description |
---|
HiddenHttpMethodFilter() |
Modifier and Type | Method and Description |
---|---|
protected void |
doFilterInternal(HttpServletRequest request,
HttpServletResponse response,
FilterChain filterChain)
Same contract as for
doFilter , but guaranteed to be
just invoked once per request within a single request thread. |
void |
setMethodParam(String methodParam)
Set the parameter name to look for HTTP methods.
|
doFilter, getAlreadyFilteredAttributeName, isAsyncDispatch, isAsyncStarted, shouldNotFilter, shouldNotFilterAsyncDispatch, shouldNotFilterErrorDispatch
addRequiredProperty, afterPropertiesSet, createEnvironment, destroy, getEnvironment, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setEnvironment, setServletContext
public static final String DEFAULT_METHOD_PARAM
_method
public void setMethodParam(String methodParam)
DEFAULT_METHOD_PARAM
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException
OncePerRequestFilter
doFilter
, but guaranteed to be
just invoked once per request within a single request thread.
See OncePerRequestFilter.shouldNotFilterAsyncDispatch()
for details.
Provides HttpServletRequest and HttpServletResponse arguments instead of the default ServletRequest and ServletResponse ones.
doFilterInternal
in class OncePerRequestFilter
ServletException
IOException