com.sun.jersey.spi.container.servlet.ServletContainer Maven / Gradle / Ivy
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package com.sun.jersey.spi.container.servlet;
import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.api.core.ClasspathResourceConfig;
import com.sun.jersey.api.core.PackagesResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.api.core.WebAppResourceConfig;
import com.sun.jersey.api.uri.UriComponent;
import com.sun.jersey.core.spi.component.ioc.IoCComponentProviderFactory;
import com.sun.jersey.server.impl.application.DeferredResourceConfig;
import com.sun.jersey.spi.container.ContainerNotifier;
import com.sun.jersey.spi.container.ReloadListener;
import com.sun.jersey.spi.container.WebApplication;
import com.sun.jersey.spi.container.WebApplicationFactory;
import com.sun.jersey.spi.inject.SingletonTypeInjectableProvider;
import com.sun.jersey.spi.service.ServiceFinder;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriBuilder;
import java.io.IOException;
import java.lang.reflect.Type;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* A {@link Servlet} or {@link Filter} for deploying root resource classes.
*
* If this class is declared as a filter and the initialization parameter
* {@link #PROPERTY_WEB_PAGE_CONTENT_REGEX} is not set
* or {@link #FEATURE_FILTER_FORWARD_ON_404} is not set to true then the filter
* must be declared at the last position in the filter chain as the filter will
* not forward any request to a next filter (if any) in the chain.
*
* The following sections make reference to initialization parameters. Unless
* otherwise specified the initialization parameters apply to both server
* and filter initialization parameters.
*
* The servlet or filter may be configured to have an initialization
* parameter "com.sun.jersey.config.property.resourceConfigClass" or
* "javax.ws.rs.Application" and whose value is a
* fully qualified name of a class that implements {@link ResourceConfig} or
* {@link Application}.
* If the concrete class has a constructor that takes a single parameter of the
* type Map then the class is instantiated with that constructor and an instance
* of Map that contains all the initialization parameters is passed as the
* parameter. Otherwise, the class is instantiated as a singleton component
* managed by the runtime, and injection may be performed (the artifacts that
* may be injected are limited to injectable providers registered when
* the servlet or filter is configured).
*
* If the initialization parameter
* "com.sun.jersey.config.property.resourceConfigClass" or
* "javax.ws.rs.Application" is not present and a
* initialization parameter "com.sun.jersey.config.property.packages" is present
* (see {@link PackagesResourceConfig#PROPERTY_PACKAGES}) a new instance of
* {@link PackagesResourceConfig} is created. The initialization parameter
* "com.sun.jersey.config.property.packages" MUST be set to provide one or
* more package names. Each package name MUST be separated by ';'.
*
* The package names are added as a property value to a Map instance using
* the property name (@link PackagesResourceConfig#PROPERTY_PACKAGES}. Any
* additional initialization parameters are then added to the Map instance.
* Then that Map instance is passed to the constructor of
* {@link PackagesResourceConfig}.
*
*
* If none of the above resource configuration related initialization parameters
* are present a new instance of {@link WebAppResourceConfig} is created. The
* initialization parameter "com.sun.jersey.config.property.classpath" MAY be
* set to provide one or more resource paths. Each path MUST be separated by ';'.
*
* The resource paths are added as a property value to a Map instance using
* the property name (@link ClasspathResourceConfig.PROPERTY_CLASSPATH}. Any
* additional initialization parameters are then added to the Map instance.
* Then that Map instance is passed to the constructor of
* {@link WebAppResourceConfig}.
*
* If the initialization parameter is not present then the following resource
* paths are utilized:
* "/WEB-INF/lib" and "/WEB-INF/classes".
*
* All initialization parameters are added as properties of the created
* {@link ResourceConfig}.
*
* A new {@link WebApplication} instance will be created and configured such
* that the following classes may be injected onto a root resource, provider
* and {@link Application} classes using {@link javax.ws.rs.core.Context}:
* {@link HttpServletRequest}, {@link HttpServletResponse},
* {@link ServletContext}, {@link ServletConfig} and {@link WebConfig}.
* If this class is used as a Servlet then the {@link ServletConfig} class may
* be injected. If this class is used as a Filter then the {@link FilterConfig}
* class may be injected. {@link WebConfig} may be injected to abstract
* servlet or filter deployment.
*
* A {@link IoCComponentProviderFactory} instance may be registered by extending this class
* and overriding the method {@link #initiate(ResourceConfig, WebApplication)}
* to initiate the {@link WebApplication} with the {@link IoCComponentProviderFactory}
* instance.
*
*/
public class ServletContainer extends HttpServlet implements Filter {
/**
* The servlet initialization property whose boolean value determines
* if GlassFish default error pages will be returned or not.
*
* The default value is true.
*
* If false then GlassFish will not return default error pages.
*
* This property is supported on GlassFish version 3.1 or greater.
* @since 1.5
*/
public static final String GLASSFISH_DEFAULT_ERROR_PAGE_RESPONSE = "org.glassfish.web.isDefaultErrorPageEnabled";
/**
* The servlet initialization property whose value is a fully qualified
* class name of a class that implements {@link ResourceConfig} or
* {@link Application}.
*/
public static final String APPLICATION_CONFIG_CLASS =
"javax.ws.rs.Application";
/**
* The servlet initialization property whose value is a fully qualified
* class name of a class that implements {@link ResourceConfig} or
* {@link Application}.
*/
public static final String RESOURCE_CONFIG_CLASS =
"com.sun.jersey.config.property.resourceConfigClass";
/**
* The base path in the Web Pages where JSP templates, associated with
* viewables of resource classes, are located.
*
* If this property is not set then the base path will be the root path
* of the Web Pages.
*/
public static final String JSP_TEMPLATES_BASE_PATH =
"com.sun.jersey.config.property.JSPTemplatesBasePath";
/**
* If set the regular expression used to match an incoming servlet path URI
* to some web page content such as static resources or JSPs to be handled
* by the underlying servlet engine.
*
* The type of this property must be a String and the value must be a valid
* regular expression.
*
* This property is only applicable when this class is used as a
* {@link Filter}, otherwise this property will be ignored and not
* processed.
*
* If a servlet path matches this regular expression then the filter
* forwards the request to the next filter in the filter chain so that the
* underlying servlet engine can process the request otherwise Jersey
* will process the request.
*
* For example if you set the value to
* /(image|css)/.*
* then you can serve up images and CSS files for your Implicit or Explicit
* Views while still processing your JAX-RS resources.
*/
public static final String PROPERTY_WEB_PAGE_CONTENT_REGEX
= "com.sun.jersey.config.property.WebPageContentRegex";
/**
* If true and a 404 response with no entity body is returned from either
* the runtime or the application then the runtime forwards the request to
* the next filter in the filter chain. This enables another filter or
* the underlying servlet engine to process the request.
* Before the request is forwarded the response status is set to 200.
*
* This property is only applicable when this class is used as a
* {@link Filter}, otherwise this property will be ignored and not
* processed.
*
* Application code, such as methods corresponding to sub-resource locators
* may be invoked when this feature is enabled.
*
* This feature is an alternative to setting
* {@link #PROPERTY_WEB_PAGE_CONTENT_REGEX} and requires less configuration.
* However, application code, such as methods corresponding to sub-resource
* locators, may be invoked when this feature is enabled.
*
* The default value is false.
*/
public static final String FEATURE_FILTER_FORWARD_ON_404
= "com.sun.jersey.config.feature.FilterForwardOn404";
/**
* The filter context path.
*
* If the URL pattern of a filter is set to a base path and a wildcard,
* such as "/base/*", then this property can be used to declare a filter
* context path that behaves in the same manner as the Servlet context
* path for determining the base URI of the application. (Note that with
* the Servlet 2.x API it is not possible to determine the URL pattern
* without parsing the web.xml, hence why this property is necessary.)
*
* This property is only applicable when this class is used as a
* {@link Filter}, otherwise this property will be ignored and not
* processed.
*
* This property may consist of one or more path segments separate by '/'.
*/
public static final String PROPERTY_FILTER_CONTEXT_PATH
= "com.sun.jersey.config.feature.FilterContextPath";
/**
* A helper class for creating an injectable provider that supports
* {@link Context} with a type and constant value.
*
* @param the type of the constant value.
*/
protected static class ContextInjectableProvider extends
SingletonTypeInjectableProvider {
/**
* Create a new instance.
*
* @param type the type of the constant value.
* @param instance the constant value.
*/
protected ContextInjectableProvider(Type type, T instance) {
super(type, instance);
}
}
private transient WebComponent webComponent;
private transient FilterConfig filterConfig;
private transient Pattern staticContentPattern;
private transient boolean forwardOn404;
private class InternalWebComponent extends WebComponent {
InternalWebComponent() {
}
InternalWebComponent(Application app) {
super(app);
}
@Override
protected WebApplication create() {
return ServletContainer.this.create();
}
@Override
protected void configure(WebConfig wc, ResourceConfig rc, WebApplication wa) {
super.configure(wc, rc, wa);
ServletContainer.this.configure(wc, rc, wa);
}
@Override
protected void initiate(ResourceConfig rc, WebApplication wa) {
ServletContainer.this.initiate(rc, wa);
}
@Override
protected ResourceConfig getDefaultResourceConfig(Map props,
WebConfig wc) throws ServletException {
return ServletContainer.this.getDefaultResourceConfig(props, wc);
}
}
private transient final Application app;
public ServletContainer() {
this.app = null;
}
public ServletContainer(Class appClass) {
this.app = new DeferredResourceConfig(appClass);
}
public ServletContainer(Application app) {
this.app = app;
}
// GenericServlet
/**
* Get the servlet context for the servlet or filter, depending on
* how this class is registered.
*
* It is recommended that the {@link WebConfig} be utilized,
* see the method {@link #getWebConfig() }, to obtain the servlet context
* and initialization parameters for a servlet or filter.
*
* @return the servlet context for the servlet or filter.
*/
@Override
public ServletContext getServletContext() {
if (filterConfig != null)
return filterConfig.getServletContext();
return super.getServletContext();
}
/**
* Initiate the Web component.
*
* @param webConfig the Web configuration.
*
* @throws javax.servlet.ServletException in case of an initialization failure
*/
protected void init(WebConfig webConfig) throws ServletException {
webComponent = (app == null)
? new InternalWebComponent()
: new InternalWebComponent(app);
webComponent.init(webConfig);
}
/**
* Get the Web configuration.
*
* @return the Web configuration.
*/
protected WebConfig getWebConfig() {
return webComponent.getWebConfig();
}
/**
* Create a new instance of a {@link WebApplication}.
*
* @return the {@link WebApplication} instance.
*/
protected WebApplication create() {
return WebApplicationFactory.createWebApplication();
}
/**
* Get the default resource configuration if one is not declared in the
* web.xml.
*
* This implementation returns an instance of {@link WebAppResourceConfig}
* that scans in files and directories as declared by the
* {@link ClasspathResourceConfig#PROPERTY_CLASSPATH} if present, otherwise
* in the "WEB-INF/lib" and "WEB-INF/classes" directories.
*
* An inheriting class may override this method to supply a different
* default resource configuration implementation.
*
* @param props the properties to pass to the resource configuration.
* @param wc the web configuration.
* @return the default resource configuration.
*
* @throws javax.servlet.ServletException in case there was an error while retrieving the default resource config
*/
protected ResourceConfig getDefaultResourceConfig(Map props,
WebConfig wc) throws ServletException {
return webComponent.getWebAppResourceConfig(props, wc);
}
/**
* Configure the {@link ResourceConfig}.
*
* The {@link ResourceConfig} is configured such that the following classes
* may be injected onto the field of a root resource class or a parameter
* of a method of root resource class that is annotated with
* {@link javax.ws.rs.core.Context}: {@link HttpServletRequest}, {@link HttpServletResponse}
* , {@link ServletContext} and {@link WebConfig}.
*
* Any root resource class in registered in the resource configuration
* that is an interface is processed as follows.
* If the class is an interface and there exists a JNDI named object
* with the fully qualified class name as the JNDI name then that named
* object is added as a singleton root resource and the class is removed
* from the set of root resource classes.
*
* An inheriting class may override this method to configure the
* {@link ResourceConfig} to provide alternative or additional instances
* that are resource or provider classes or instances, and may modify the
* features and properties of the {@link ResourceConfig}. For an inheriting
* class to extend configuration behaviour the overriding method MUST call
* super.configure(servletConfig, rc, wa) as the first statement
* of that method.
*
* This method will be called only once at initiation. Subsequent
* reloads of the Web application will not result in subsequence calls to
* this method.
*
* @param wc the Web configuration
* @param rc the Resource configuration
* @param wa the Web application
*/
protected void configure(WebConfig wc, ResourceConfig rc, WebApplication wa) {
if (getServletConfig() != null)
configure(getServletConfig(), rc, wa);
else if (filterConfig != null)
configure(filterConfig, rc, wa);
if (rc instanceof ReloadListener) {
List notifiers = new ArrayList();
Object o = rc.getProperties().get(ResourceConfig.PROPERTY_CONTAINER_NOTIFIER);
if (o instanceof ContainerNotifier)
notifiers.add((ContainerNotifier) o);
else if (o instanceof List)
for (Object elem : (List) o)
if (elem instanceof ContainerNotifier)
notifiers.add((ContainerNotifier) elem);
for (ContainerNotifier cn : ServiceFinder.find(ContainerNotifier.class)) {
notifiers.add(cn);
}
rc.getProperties().put(ResourceConfig.PROPERTY_CONTAINER_NOTIFIER, notifiers);
}
}
/**
* Initiate the {@link WebApplication}.
*
* This method will be called once at initiation and for
* each reload of the Web application.
*
* An inheriting class may override this method to initiate the
* Web application with different parameters.
*
* @param rc the Resource configuration
* @param wa the Web application
*/
protected void initiate(ResourceConfig rc, WebApplication wa) {
wa.initiate(rc);
}
/**
* Load the Web application. This will create, configure and initiate
* the web application.
*/
public void load() {
webComponent.load();
}
/**
* Reload the Web application. This will create and initiate the web
* application using the same {@link ResourceConfig} implementation
* that was used to load the Web application.
*
* This method may be called at runtime, more than once, to reload the
* Web application. For example, if a {@link ResourceConfig} implementation
* is capable of detecting changes to resource classes (addition or removal)
* or providers then this method may be invoked to reload the web
* application for such changes to take effect.
*
* If this method is called when there are pending requests then such
* requests will be processed using the previously loaded web application.
*/
public void reload() {
webComponent.onReload();
}
/**
* Dispatch client requests to a resource class.
*
* @param baseUri the base URI of the request.
* @param requestUri the URI of the request.
* @param request the {@link HttpServletRequest} object that
* contains the request the client made to
* the Web component.
* @param response the {@link HttpServletResponse} object that
* contains the response the Web component returns
* to the client.
* @return the status code of the response.
* @exception IOException if an input or output error occurs
* while the Web component is handling the
* HTTP request.
* @exception ServletException if the HTTP request cannot
* be handled.
*/
public int service(URI baseUri, URI requestUri, final HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
return webComponent.service(baseUri, requestUri, request, response);
}
/**
* Destroy this Servlet or Filter.
*
*/
@Override
public void destroy() {
if (webComponent != null) {
webComponent.destroy();
}
}
// Servlet
@Override
public void init() throws ServletException {
init(new WebServletConfig(this));
}
/**
* Get the default resource configuration if one is not declared in the
* web.xml.
*
* This implementation returns an instance of {@link WebAppResourceConfig}
* that scans in files and directories as declared by the
* {@link ClasspathResourceConfig#PROPERTY_CLASSPATH} if present, otherwise
* in the "WEB-INF/lib" and "WEB-INF/classes" directories.
*
* An inheriting class may override this method to supply a different
* default resource configuration implementation.
*
* @param props the properties to pass to the resource configuration.
* @param servletConfig the servlet configuration.
* @return the default resource configuration.
*
* @throws javax.servlet.ServletException in case there was an error while retrieving the default resource config
* @deprecated methods should implement {@link #getDefaultResourceConfig(java.util.Map, com.sun.jersey.spi.container.servlet.WebConfig) }.
*/
@Deprecated
protected ResourceConfig getDefaultResourceConfig(Map props,
ServletConfig servletConfig) throws ServletException {
return getDefaultResourceConfig(props, getWebConfig());
}
/**
* Configure the {@link ResourceConfig} for a Servlet.
*
* The {@link ResourceConfig} is configured such that the following classes
* may be injected onto the field of a root resource class or a parameter
* of a method of root resource class that is annotated with
* {@link javax.ws.rs.core.Context}: {@link ServletConfig}.
*
* An inheriting class may override this method to configure the
* {@link ResourceConfig} to provide alternative or additional instances
* that are resource or provider classes or instances, and may modify the
* features and properties of the {@link ResourceConfig}. For an inheriting
* class to extend configuration behaviour the overriding method MUST call
* super.configure(servletConfig, rc, wa) as the first statement of that
* method.
*
* This method will be called only once at servlet initiation. Subsequent
* reloads of the Web application will not result in subsequence calls to
* this method.
*
* @param sc the Servlet configuration
* @param rc the Resource configuration
* @param wa the Web application
*/
protected void configure(final ServletConfig sc, ResourceConfig rc, WebApplication wa) {
rc.getSingletons().add(new ContextInjectableProvider(
ServletConfig.class, sc));
}
/**
* Dispatches client requests to the {@link #service(java.net.URI, java.net.URI, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) }
* method.
*
* @param request the {@link HttpServletRequest} object that
* contains the request the client made to
* the servlet.
* @param response the {@link HttpServletResponse} object that
* contains the response the servlet returns
* to the client.
* @exception IOException if an input or output error occurs
* while the servlet is handling the
* HTTP request.
* @exception ServletException if the HTTP request cannot
* be handled.
*/
@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
/**
* There is an annoying edge case where the service method is
* invoked for the case when the URI is equal to the deployment URL
* minus the '/', for example http://locahost:8080/HelloWorldWebApp
*/
final String servletPath = request.getServletPath();
String pathInfo = request.getPathInfo();
StringBuffer requestURL = request.getRequestURL();
String requestURI = request.getRequestURI();
final boolean checkPathInfo = pathInfo == null || pathInfo.isEmpty() || pathInfo.equals("/");
final boolean checkServletPath = servletPath == null || servletPath.isEmpty();
if (checkPathInfo && checkServletPath && !request.getRequestURI().endsWith("/")) {
if (webComponent.getResourceConfig().getFeature(ResourceConfig.FEATURE_REDIRECT)) {
URI l = UriBuilder.fromUri(request.getRequestURL().toString()).
path("/").
replaceQuery(request.getQueryString()).build();
response.setStatus(307);
response.setHeader("Location", l.toASCIIString());
return;
} else {
pathInfo = "/";
requestURL.append("/");
requestURI += "/";
}
}
/**
* The HttpServletRequest.getRequestURL() contains the complete URI
* minus the query and fragment components.
*/
UriBuilder absoluteUriBuilder = UriBuilder.fromUri(
requestURL.toString());
/**
* The HttpServletRequest.getPathInfo() and
* HttpServletRequest.getServletPath() are in decoded form.
*
* On some servlet implementations the getPathInfo() removed
* contiguous '/' characters. This is problematic if URIs
* are embedded, for example as the last path segment.
* We need to work around this and not use getPathInfo
* for the decodedPath.
*/
final String decodedBasePath = (pathInfo != null)
? request.getContextPath() + servletPath + "/"
: request.getContextPath() + "/";
final String encodedBasePath = UriComponent.encode(decodedBasePath,
UriComponent.Type.PATH);
if (!decodedBasePath.equals(encodedBasePath)) {
throw new ContainerException("The servlet context path and/or the " +
"servlet path contain characters that are percent encoded");
}
final URI baseUri = absoluteUriBuilder.replacePath(encodedBasePath).
build();
String queryParameters = request.getQueryString();
if (queryParameters == null) {
queryParameters = "";
}
final URI requestUri = absoluteUriBuilder.replacePath(requestURI).
replaceQuery(queryParameters).
build();
service(baseUri, requestUri, request, response);
}
// Filter
private String filterContextPath = null;
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
init(new WebFilterConfig(filterConfig));
}
/**
* @return the {@link Pattern} compiled from a regular expression that is
* the property value of {@link #PROPERTY_WEB_PAGE_CONTENT_REGEX}.
* A null value will be returned if the property is not present
* is or an empty String.
*/
public Pattern getStaticContentPattern() {
return staticContentPattern;
}
/**
* Configure the {@link ResourceConfig} for a Filter.
*
* The {@link ResourceConfig} is configured such that the following classes
* may be injected onto the field of a root resource class or a parameter
* of a method of root resource class that is annotated with
* {@link javax.ws.rs.core.Context}: {@link FilterConfig}.
*
* An inheriting class may override this method to configure the
* {@link ResourceConfig} to provide alternative or additional instances
* that are resource or provider classes or instances, and may modify the
* features and properties of the {@link ResourceConfig}. For an inheriting
* class to extend configuration behaviour the overriding method MUST call
* super.configure(servletConfig, rc, wa) as the first statement of that
* method.
*
* This method will be called only once at servlet initiation. Subsequent
* reloads of the Web application will not result in subsequence calls to
* this method.
*
* @param fc the Filter configuration
* @param rc the Resource configuration
* @param wa the Web application
*/
protected void configure(final FilterConfig fc, ResourceConfig rc, WebApplication wa) {
rc.getSingletons().add(new ContextInjectableProvider(
FilterConfig.class, fc));
String regex = (String)rc.getProperty(PROPERTY_WEB_PAGE_CONTENT_REGEX);
if (regex != null && regex.length() > 0) {
try {
staticContentPattern = Pattern.compile(regex);
} catch (PatternSyntaxException ex) {
throw new ContainerException(
"The syntax is invalid for the regular expression, " + regex +
", associated with the initialization parameter " + PROPERTY_WEB_PAGE_CONTENT_REGEX, ex);
}
}
forwardOn404 = rc.getFeature(FEATURE_FILTER_FORWARD_ON_404);
this.filterContextPath = filterConfig.getInitParameter(PROPERTY_FILTER_CONTEXT_PATH);
if (filterContextPath != null) {
if (filterContextPath.isEmpty()) {
filterContextPath = null;
} else {
if (!filterContextPath.startsWith("/")) {
filterContextPath = '/' + filterContextPath;
}
if (filterContextPath.endsWith("/")) {
filterContextPath = filterContextPath.substring(0, filterContextPath.length() - 1);
}
}
}
}
/**
* Dispatches client requests to the {@link #doFilter(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.FilterChain) }
* method.
*
* @param request the {@link HttpServletRequest} object that
* contains the request the client made to
* the servlet.
* @param response the {@link HttpServletResponse} object that
* contains the response the servlet returns
* to the client.
* @param chain the chain of filters from which the next filter can be invoked.
* @throws java.io.IOException
* @throws javax.servlet.ServletException
*/
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
try {
doFilter((HttpServletRequest)request, (HttpServletResponse)response, chain);
} catch (ClassCastException e) {
throw new ServletException("non-HTTP request or response");
}
}
/**
* Dispatches client requests to the {@link #service(java.net.URI, java.net.URI, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) }
* method.
*
* If the servlet path matches the regular expression declared by the
* property {@link #PROPERTY_WEB_PAGE_CONTENT_REGEX} then the request
* is forwarded to the next filter in the filter chain so that the
* underlying servlet engine can process the request otherwise Jersey
* will process the request.
*
* @param request the {@link HttpServletRequest} object that
* contains the request the client made to
* the servlet.
* @param response the {@link HttpServletResponse} object that
* contains the response the servlet returns
* to the client.
* @param chain the chain of filters from which the next filter can be invoked.
* @throws java.io.IOException
* @throws javax.servlet.ServletException
*/
public void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
if (request.getAttribute("javax.servlet.include.request_uri") != null) {
final String includeRequestURI = (String)request.getAttribute("javax.servlet.include.request_uri");
if (!includeRequestURI.equals(request.getRequestURI())) {
doFilter(request, response, chain,
includeRequestURI,
(String)request.getAttribute("javax.servlet.include.servlet_path"),
(String)request.getAttribute("javax.servlet.include.query_string"));
return;
}
}
doFilter(request, response, chain,
request.getRequestURI(),
request.getServletPath(),
request.getQueryString());
}
private void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain,
String requestURI, String servletPath, String queryString) throws IOException, ServletException {
// if we match the static content regular expression lets delegate to
// the filter chain to use the default container servlets & handlers
final Pattern p = getStaticContentPattern();
if (p != null && p.matcher(servletPath).matches()) {
chain.doFilter(request, response);
return;
}
if (filterContextPath != null) {
if (!servletPath.startsWith(filterContextPath)) {
throw new ContainerException("The servlet path, \"" + servletPath +
"\", does not start with the filter context path, \"" + filterContextPath + "\"");
} else if (servletPath.length() == filterContextPath.length()) {
// Path does not end in a slash, may need to redirect
if (webComponent.getResourceConfig().getFeature(ResourceConfig.FEATURE_REDIRECT)) {
URI l = UriBuilder.fromUri(request.getRequestURL().toString()).
path("/").
replaceQuery(queryString).build();
response.setStatus(307);
response.setHeader("Location", l.toASCIIString());
return;
} else {
requestURI += "/";
}
}
}
final UriBuilder absoluteUriBuilder = UriBuilder.fromUri(
request.getRequestURL().toString());
final URI baseUri = (filterContextPath == null)
? absoluteUriBuilder.replacePath(request.getContextPath()).
path("/").
build()
: absoluteUriBuilder.replacePath(request.getContextPath()).
path(filterContextPath).
path("/").
build();
final URI requestUri = absoluteUriBuilder.replacePath(requestURI).
replaceQuery(queryString).
build();
final int status = service(baseUri, requestUri, request, response);
// If forwarding is configured and response is a 404 with no entity
// body then call the next filter in the chain
if (forwardOn404 && status == 404 && !response.isCommitted()) {
// lets clear the response to OK before we forward to the next in the chain
// as OK is the default set by servlet containers before filters/servlets do any wor
// so lets hide our footsteps and pretend we were never in the chain at all and let the
// next filter or servlet return the 404 if they can't find anything to return
//
// We could add an optional flag to disable this step if anyone can ever find a case where
// this causes a problem, though I suspect any problems will really be with downstream
// servlets not correctly setting an error status if they cannot find something to return
response.setStatus(HttpServletResponse.SC_OK);
chain.doFilter(request, response);
}
}
}