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34 package info.magnolia.cms.filters;
35
36 import info.magnolia.cms.util.RequestHeaderUtil;
37 import info.magnolia.cms.util.ServletUtils;
38 import info.magnolia.voting.Voter;
39 import info.magnolia.voting.Voting;
40
41 import java.io.IOException;
42 import java.util.ArrayList;
43 import java.util.Collection;
44 import java.util.regex.Pattern;
45
46 import javax.inject.Inject;
47 import javax.servlet.FilterChain;
48 import javax.servlet.FilterConfig;
49 import javax.servlet.ServletException;
50 import javax.servlet.ServletRequest;
51 import javax.servlet.ServletResponse;
52 import javax.servlet.http.HttpServletRequest;
53 import javax.servlet.http.HttpServletResponse;
54
55 import org.apache.commons.lang.ArrayUtils;
56 import org.slf4j.Logger;
57 import org.slf4j.LoggerFactory;
58
59
60
61
62
63
64
65 public abstract class AbstractMgnlFilter implements MgnlFilter {
66
67 private static final Logger log = LoggerFactory.getLogger(AbstractMgnlFilter.class);
68
69 private String name;
70
71 private Voter[] bypasses = new Voter[0];
72
73 private boolean enabled = true;
74
75 private DispatchRules dispatching = new DispatchRules();
76
77 private Mapping mapping = new Mapping();
78
79 @Inject
80 private WebContainerResources webContainerResources;
81
82 protected AbstractMgnlFilter() {
83 }
84
85 @Override
86 public void init(FilterConfig filterConfig) throws ServletException {
87 }
88
89 @Override
90 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
91 doFilter((HttpServletRequest) request, (HttpServletResponse) response, chain);
92 }
93
94 public abstract void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException;
95
96 @Override
97 public boolean matches(HttpServletRequest request) {
98 return isEnabled() && matchesDispatching(request) && mapsTo(request) && !bypasses(request);
99 }
100
101 protected boolean mapsTo(HttpServletRequest request) {
102 if(getMapping().getMappings().isEmpty()){
103 return true;
104 }
105 return getMapping().match(request).isMatching();
106 }
107
108 protected boolean matchesDispatching(HttpServletRequest request) {
109 if(webContainerResources == null){
110 return true;
111 }
112 boolean toWebContainerResource = webContainerResources.isWebContainerResource(request);
113 boolean toMagnoliaResource = !toWebContainerResource;
114
115 DispatchRule dispatchRule = getDispatching().getDispatchRule(ServletUtils.getDispatcherType(request));
116 if (toMagnoliaResource && dispatchRule.isToMagnoliaResources()) {
117 return true;
118 }
119 if (toWebContainerResource && dispatchRule.isToWebContainerResources()) {
120 return true;
121 }
122 return false;
123 }
124
125 protected boolean bypasses(HttpServletRequest request) {
126 Voting voting = Voting.HIGHEST_LEVEL;
127 if (voting.vote(bypasses, request) > 0) {
128 return true;
129 }
130
131 return false;
132 }
133
134 @Override
135 public void destroy() {
136
137 }
138
139 public Voter[] getBypasses() {
140 return this.bypasses;
141 }
142
143 public void addBypass(Voter voter) {
144 this.bypasses = (Voter[]) ArrayUtils.add(this.bypasses, voter);
145 }
146
147 @Override
148 public String getName() {
149 return this.name;
150 }
151
152 @Override
153 public void setName(String name) {
154 this.name = name;
155 }
156
157 public boolean isEnabled() {
158 return this.enabled;
159 }
160
161 public void setEnabled(boolean enabled) {
162 this.enabled = enabled;
163 }
164
165 public DispatchRules getDispatching() {
166 return dispatching;
167 }
168
169 public void setDispatching(DispatchRules dispatching) {
170 this.dispatching = dispatching;
171 }
172
173 public Collection<String> getMappings() {
174 ArrayList<String> result = new ArrayList<String>();
175 for (Pattern pattern : getMapping().getMappings()) {
176 result.add(pattern.pattern());
177 }
178 return result;
179 }
180
181 protected Mapping getMapping() {
182 return mapping;
183 }
184
185 public void addMapping(String mapping){
186 this.getMapping().addMapping(mapping);
187 }
188
189
190 protected boolean acceptsGzipEncoding(HttpServletRequest request) {
191 return RequestHeaderUtil.acceptsGzipEncoding(request);
192 }
193
194 protected boolean acceptsEncoding(final HttpServletRequest request, final String name) {
195 return RequestHeaderUtil.acceptsEncoding(request, name);
196 }
197
198 protected boolean headerContains(final HttpServletRequest request, final String header, final String value) {
199 return RequestHeaderUtil.headerContains(request, header, value);
200 }
201
202 protected void addAndVerifyHeader(HttpServletResponse response, String name, String value) {
203 RequestHeaderUtil.addAndVerifyHeader(response, name, value);
204 }
205
206
207
208 }