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/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://jersey.dev.java.net/CDDL+GPL.html
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* Header, with the fields enclosed by brackets [] replaced by your own
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*/
package com.sun.jersey.server.impl.uri.rules;
import com.sun.jersey.core.header.MediaTypes;
import com.sun.jersey.api.core.HttpRequestContext;
import com.sun.jersey.api.core.HttpResponseContext;
import com.sun.jersey.server.impl.model.method.ResourceMethod;
import com.sun.jersey.api.Responses;
import com.sun.jersey.core.header.QualitySourceMediaType;
import com.sun.jersey.server.impl.template.ViewResourceMethod;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerRequestFilter;
import com.sun.jersey.spi.uri.rules.UriRule;
import com.sun.jersey.spi.uri.rules.UriRuleContext;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.ws.rs.core.MediaType;
/**
* The rule for accepting an HTTP method.
*
* @author [email protected]
*/
public final class HttpMethodRule implements UriRule {
private final Map> map;
private final List priorityMediaTypes;
private final String allow;
private final boolean isSubResource;
public HttpMethodRule(
Map> methods,
List priorityMediaTypes) {
this(methods, priorityMediaTypes, false);
}
public HttpMethodRule(
Map> methods,
List priorityMediaTypes,
boolean isSubResource) {
this.map = methods;
this.priorityMediaTypes = priorityMediaTypes;
this.isSubResource = isSubResource;
this.allow = getAllow(methods);
}
private String getAllow(Map> methods) {
StringBuilder s = new StringBuilder();
boolean first = true;
for (String method : methods.keySet()) {
if (!first) s.append(",");
first = false;
s.append(method);
}
return s.toString();
}
public boolean accept(CharSequence path, Object resource, UriRuleContext context) {
// If the path is not empty then do not accept
if (path.length() > 0) return false;
final HttpRequestContext request = context.getRequest();
final HttpResponseContext response = context.getResponse();
// Get the list of resource methods for the HTTP method
List methods = map.get(request.getMethod());
if (methods == null) {
// No resource methods are found
response.setResponse(Responses.methodNotAllowed().
header("Allow", allow).build());
// Allow any further matching rules to be processed
return false;
}
// Get the list of matching methods
List accept = (priorityMediaTypes == null)
? request.getAcceptableMediaTypes()
: request.getAcceptableMediaTypes(priorityMediaTypes);
final Matcher m = new Matcher();
final MatchStatus s = m.match(methods, request.getMediaType(), accept);
if (s == MatchStatus.MATCH) {
// If there is a match choose the first method
final ResourceMethod method = m.rmSelected;
if (method instanceof ViewResourceMethod) {
// Set the content type to the most acceptable
if (!m.mSelected.isWildcardType() && !m.mSelected.isWildcardSubtype()) {
response.getHttpHeaders().putSingle("Content-Type", m.mSelected);
}
// Allow the view to be processed by the further matching view rule
return false;
// TODO what about resource specific request and response filters?
// Should the viewable rule be responsible for those declared on
// the class
}
// If a sub-resource method then need to push the resource
// (again) as as to keep in sync with the ancestor URIs
if (isSubResource) {
context.pushResource(resource);
// Set the template values
context.pushMatch(method.getTemplate(), method.getTemplate().getTemplateVariables());
}
// Push the response filters
context.pushContainerResponseFilters(method.getResponseFilters());
// Process the request filter
if (!method.getRequestFilters().isEmpty()) {
ContainerRequest containerRequest = context.getContainerRequest();
for (ContainerRequestFilter f : method.getRequestFilters()) {
containerRequest = f.filter(containerRequest);
context.setContainerRequest(containerRequest);
}
}
// Dispatch to the resource method
method.getDispatcher().dispatch(resource, context);
// If the content type is not explicitly set then set it
// to the selected media type, if a concrete media type
// and @Produces is declared on the resource method or the resource
// class
Object contentType = response.getHttpHeaders().getFirst("Content-Type");
if (contentType == null && method.isProducesDeclared()) {
if (!m.mSelected.isWildcardType() && !m.mSelected.isWildcardSubtype()) {
response.getHttpHeaders().putSingle("Content-Type", m.mSelected);
}
}
return true;
} else if (s == MatchStatus.NO_MATCH_FOR_CONSUME) {
response.setResponse(Responses.unsupportedMediaType().build());
// Allow any further matching rules to be processed
return false;
} else if (s == MatchStatus.NO_MATCH_FOR_PRODUCE) {
response.setResponse(Responses.notAcceptable().build());
// Allow any further matching rules to be processed
return false;
}
return true;
}
private enum MatchStatus {
MATCH, NO_MATCH_FOR_CONSUME, NO_MATCH_FOR_PRODUCE
}
private static class Matcher extends LinkedList {
private MediaType mSelected = null;
private ResourceMethod rmSelected = null;
/**
* Find the subset of methods that match the 'Content-Type' and 'Accept'.
*
* @param methods the list of resource methods
* @param contentType the 'Content-Type'.
* @param accept the 'Accept' as a list. This list
* MUST be ordered with the highest quality acceptable Media type
* occuring first (see
* {@link com.sun.ws.rest.impl.model.MimeHelper#ACCEPT_MEDIA_TYPE_COMPARATOR}).
* @return the match status.
*/
private MatchStatus match(
List methods,
MediaType contentType,
List acceptableMediaTypes) {
List selected = null;
if (contentType != null) {
// Find all methods that consume the MIME type of 'Content-Type'
for (ResourceMethod method : methods)
if (method.consumes(contentType))
add(method);
if (isEmpty())
return MatchStatus.NO_MATCH_FOR_CONSUME;
selected = this;
} else {
selected = methods;
}
for (MediaType amt : acceptableMediaTypes) {
for (ResourceMethod rm : selected) {
for (MediaType p : rm.getProduces()) {
if (p.isCompatible(amt)) {
mSelected = MediaTypes.mostSpecific(p, amt);
rmSelected = rm;
return MatchStatus.MATCH;
}
}
}
}
return MatchStatus.NO_MATCH_FOR_PRODUCE;
}
}
}
