org.apache.nifi.web.filter

Class NodeRequestFilter

java.lang.Object

org.apache.nifi.web.filter.NodeRequestFilter

All Implemented Interfaces:

javax.servlet.Filter

public class NodeRequestFilter
extends Object
implements javax.servlet.Filter

A filter that prevents direct access to nodes (i.e., flow controllers connected to a cluster). Direct access to nodes by clients external to the cluster is prevented because the dataflow must be identical across the cluster. Direct access to a node is determined by the presence of a custom request header. The header key is "X-CLUSTER_MANAGER" and the value can be anything/empty. The presence of this header is a simple way to flag that the request was issued by the cluster manager and may proceed to the next filter. Since this header may be faked, we only make decisions about the header if the application instance is a node and connected to the cluster.

Author:

unattributed

Field Summary

Fields

Modifier and Type	Field and Description
private javax.servlet.FilterConfig	config
private static org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
NodeRequestFilter()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest req, javax.servlet.ServletResponse resp, javax.servlet.FilterChain filterChain)
void	init(javax.servlet.FilterConfig config)

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.slf4j.Logger logger

config

private javax.servlet.FilterConfig config

Constructor Detail

NodeRequestFilter

public NodeRequestFilter()

Method Detail

doFilter

public void doFilter(javax.servlet.ServletRequest req,
            javax.servlet.ServletResponse resp,
            javax.servlet.FilterChain filterChain)
              throws IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

IOException

javax.servlet.ServletException

init

public void init(javax.servlet.FilterConfig config)

Specified by:

init in interface javax.servlet.Filter

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter