Package org.eclipse.jetty.rewrite.handler

Class RewriteHandler

java.lang.Object

org.eclipse.jetty.util.component.AbstractLifeCycle

org.eclipse.jetty.util.component.ContainerLifeCycle

org.eclipse.jetty.server.handler.AbstractHandler

org.eclipse.jetty.server.handler.AbstractHandlerContainer

org.eclipse.jetty.server.handler.HandlerWrapper

org.eclipse.jetty.rewrite.handler.RewriteHandler

All Implemented Interfaces:

Handler, HandlerContainer, Container, Destroyable, Dumpable, Dumpable.DumpableContainer, LifeCycle

public class RewriteHandler
extends HandlerWrapper

Rewrite handler is responsible for managing the rules. Its capabilities is not only limited for URL rewrites such as RewritePatternRule or RewriteRegexRule. There is also handling for cookies, headers, redirection, setting status or error codes whenever the rule finds a match.

The rules can be matched by the either: pattern matching of @ServletPathSpec (eg PatternRule), regular expressions (eg RegexRule) or certain conditions set (eg MsieSslRule - the requests must be in SSL mode).

The rules can be grouped into rule containers (class RuleContainer), and will only be applied if the request matches the conditions for their container (e.g., by virtual host name)

The list of predefined rules is:

• CookiePatternRule - adds a new cookie in response.
• HeaderPatternRule - adds/modifies the HTTP headers in response.
• RedirectPatternRule - sets the redirect location.
• ResponsePatternRule - sets the status/error codes.
• RewritePatternRule - rewrites the requested URI.
• RewriteRegexRule - rewrites the requested URI using regular expression for pattern matching.
• MsieSslRule - disables the keep alive on SSL for IE5 and IE6.
• ForwardedSchemeHeaderRule - set the scheme according to the headers present.
• VirtualHostRuleContainer - checks whether the request matches one of a set of virtual host names.

Here is a typical jetty.xml configuration would be:

     <New id="RewriteHandler" class="org.eclipse.jetty.rewrite.handler.RewriteHandler">
       <Set name="rules">
         <Array type="org.eclipse.jetty.rewrite.handler.Rule">

           <Item>
             <New id="rewrite" class="org.eclipse.jetty.rewrite.handler.RewritePatternRule">
               <Set name="pattern">/*</Set>
               <Set name="replacement">/test</Set>
             </New>
           </Item>

           <Item>
             <New id="response" class="org.eclipse.jetty.rewrite.handler.ResponsePatternRule">
               <Set name="pattern">/session/</Set>
               <Set name="code">400</Set>
               <Set name="reason">Setting error code 400</Set>
             </New>
           </Item>

           <Item>
             <New id="header" class="org.eclipse.jetty.rewrite.handler.HeaderPatternRule">
               <Set name="pattern">*.jsp</Set>
               <Set name="name">server</Set>
               <Set name="value">dexter webserver</Set>
             </New>
           </Item>

           <Item>
             <New id="header" class="org.eclipse.jetty.rewrite.handler.HeaderPatternRule">
               <Set name="pattern">*.jsp</Set>
               <Set name="name">title</Set>
               <Set name="value">driven header purpose</Set>
             </New>
           </Item>

           <Item>
             <New id="redirect" class="org.eclipse.jetty.rewrite.handler.RedirectPatternRule">
               <Set name="pattern">/test/dispatch</Set>
               <Set name="location">http://jetty.eclipse.org</Set>
             </New>
           </Item>

           <Item>
             <New id="regexRewrite" class="org.eclipse.jetty.rewrite.handler.RewriteRegexRule">
               <Set name="regex">/test-jaas/$</Set>
               <Set name="replacement">/demo</Set>
             </New>
           </Item>

           <Item>
             <New id="forwardedHttps" class="org.eclipse.jetty.rewrite.handler.ForwardedSchemeHeaderRule">
               <Set name="header">X-Forwarded-Scheme</Set>
               <Set name="headerValue">https</Set>
               <Set name="scheme">https</Set>
             </New>
           </Item>

           <Item>
             <New id="virtualHost" class="org.eclipse.jetty.rewrite.handler.VirtualHostRuleContainer">

               <Set name="virtualHosts">
                 <Array type="java.lang.String">
                   <Item>eclipse.com</Item>
                   <Item>www.eclipse.com</Item>
                   <Item>eclipse.org</Item>
                   <Item>www.eclipse.org</Item>
                 </Array>
               </Set>

               <Call name="addRule">
                 <Arg>
                   <New class="org.eclipse.jetty.rewrite.handler.CookiePatternRule">
                     <Set name="pattern">/*</Set>
                     <Set name="name">CookiePatternRule</Set>
                     <Set name="value">1</Set>
                   </New>
                 </Arg>
               </Call>

             </New>
           </Item>

         </Array>
       </Set>
     </New>

     <Set name="handler">
       <Ref id="RewriteHandler"/>
         <Set name="handler">
           <New id="Handlers" class="org.eclipse.jetty.server.handler.HandlerCollection">
             <Set name="handlers">
               <Array type="org.eclipse.jetty.server.Handler">
                 <Item>
                   <New id="Contexts" class="org.eclipse.jetty.server.handler.ContextHandlerCollection"/>
                 </Item>
                 <Item>
                   <New id="DefaultHandler" class="org.eclipse.jetty.server.handler.DefaultHandler"/>
                 </Item>
               </Array>
             </Set>
           </New>
         </Set>
       </Ref>
     </Set>
 

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.jetty.server.handler.AbstractHandler

AbstractHandler.ErrorDispatchHandler

Nested classes/interfaces inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

AbstractLifeCycle.AbstractLifeCycleListener, AbstractLifeCycle.StopException

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.Container

Container.InheritedListener, Container.Listener

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.Dumpable

Dumpable.DumpableContainer

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.LifeCycle

LifeCycle.Listener

Field Summary

Fields inherited from class org.eclipse.jetty.server.handler.HandlerWrapper

_handler

Fields inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

FAILED, STARTED, STARTING, STOPPED, STOPPING

Fields inherited from interface org.eclipse.jetty.util.component.Dumpable

KEY

Constructor Summary

Constructors

Constructor	Description
RewriteHandler()

Method Summary

Modifier and Type	Method	Description
void	addRule(Rule rule)	Add a Rule
EnumSet<jakarta.servlet.DispatcherType>	getDispatcherTypes()
String	getOriginalPathAttribute()
RuleContainer	getRuleContainer()
Rule[]	getRules()	Returns the list of rules.
void	handle(String target, Request baseRequest, jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response)	Handle a request.
boolean	isRewritePathInfo()
boolean	isRewriteRequestURI()
void	setDispatcherTypes(jakarta.servlet.DispatcherType... types)
void	setDispatcherTypes(EnumSet<jakarta.servlet.DispatcherType> types)
void	setOriginalPathAttribute(String originalPathAttribute)
void	setRewritePathInfo(boolean rewritePathInfo)
void	setRewriteRequestURI(boolean rewriteRequestURI)
void	setRuleContainer(RuleContainer rules)	Assigns the rules to process.
void	setRules(Rule[] rules)	Assigns the rules to process.

Methods inherited from class org.eclipse.jetty.server.handler.HandlerWrapper

destroy, expandChildren, getHandler, getHandlers, insertHandler, setHandler

Methods inherited from class org.eclipse.jetty.server.handler.AbstractHandlerContainer

expandHandler, findContainerOf, getChildHandlerByClass, getChildHandlers, getChildHandlersByClass, setServer

Methods inherited from class org.eclipse.jetty.server.handler.AbstractHandler

doError, doStart, doStop, getServer

Methods inherited from class org.eclipse.jetty.util.component.ContainerLifeCycle

addBean, addBean, addEventListener, addManaged, contains, dump, dump, dump, dumpObjects, dumpStdErr, getBean, getBeans, getBeans, getContainedBeans, getContainedBeans, isAuto, isManaged, isUnmanaged, manage, removeBean, removeBeans, removeEventListener, setBeans, start, stop, unmanage, updateBean, updateBean, updateBeans, updateBeans

Methods inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

getEventListeners, getState, getState, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, setEventListeners, start, stop, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.jetty.util.component.Container

getCachedBeans, getEventListeners

Methods inherited from interface org.eclipse.jetty.util.component.Dumpable

dumpSelf

Methods inherited from interface org.eclipse.jetty.util.component.Dumpable.DumpableContainer

isDumpable

Methods inherited from interface org.eclipse.jetty.util.component.LifeCycle

addEventListener, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeEventListener, start, stop

Constructor Details

RewriteHandler

public RewriteHandler()

Method Details

getRules

public Rule[] getRules()

Returns the list of rules.

Returns:

an array of Rule.

setRules

public void setRules(Rule[] rules)

Assigns the rules to process.

Parameters:

rules - an array of Rule.

setRuleContainer

public void setRuleContainer(RuleContainer rules)

Assigns the rules to process.

Parameters:

rules - a RuleContainer containing other rules to process

getRuleContainer

public RuleContainer getRuleContainer()

addRule

public void addRule(Rule rule)

Add a Rule

Parameters:

rule - The rule to add to the end of the rules array

isRewriteRequestURI

public boolean isRewriteRequestURI()

Returns:

the rewriteRequestURI If true, this handler will rewrite the value returned by HttpServletRequest.getRequestURI().

setRewriteRequestURI

public void setRewriteRequestURI(boolean rewriteRequestURI)

Parameters:

rewriteRequestURI - true if this handler will rewrite the value returned by HttpServletRequest.getRequestURI().

isRewritePathInfo

public boolean isRewritePathInfo()

Returns:

true if this handler will rewrite the value returned by HttpServletRequest.getPathInfo().

setRewritePathInfo

public void setRewritePathInfo(boolean rewritePathInfo)

Parameters:

rewritePathInfo - true if this handler will rewrite the value returned by HttpServletRequest.getPathInfo().

getOriginalPathAttribute

public String getOriginalPathAttribute()

Returns:

the originalPathAttribte. If non null, this string will be used as the attribute name to store the original request path.

setOriginalPathAttribute

public void setOriginalPathAttribute(String originalPathAttribute)

Parameters:

originalPathAttribute - If non null, this string will be used as the attribute name to store the original request path.

getDispatcherTypes

public EnumSet<jakarta.servlet.DispatcherType> getDispatcherTypes()

setDispatcherTypes

public void setDispatcherTypes(EnumSet<jakarta.servlet.DispatcherType> types)

setDispatcherTypes

public void setDispatcherTypes(jakarta.servlet.DispatcherType... types)

handle

public void handle(String target,
 Request baseRequest,
 jakarta.servlet.http.HttpServletRequest request,
 jakarta.servlet.http.HttpServletResponse response)
            throws IOException,
jakarta.servlet.ServletException

Description copied from interface: Handler

Handle a request.

Specified by:

handle in interface Handler

Overrides:

handle in class HandlerWrapper

Parameters:

target - The target of the request - either a URI or a name.

baseRequest - The original unwrapped request object.

request - The request either as the Request object or a wrapper of that request. The HttpConnection.getCurrentConnection().getHttpChannel().getRequest() method can be used access the Request object if required.

response - The response as the Response object or a wrapper of that request. The HttpConnection.getCurrentConnection().getHttpChannel().getResponse() method can be used access the Response object if required.

Throws:

IOException - if unable to handle the request or response processing

jakarta.servlet.ServletException - if unable to handle the request or response due to underlying servlet issue