org.springframework.security.web.util.matcher.AntPathRequestMatcher Maven / Gradle / Ivy
/*
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.web.util.matcher;
import java.util.Collections;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.HttpMethod;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.web.util.UrlPathHelper;
/**
* Matcher which compares a pre-defined ant-style pattern against the URL (
* {@code servletPath + pathInfo}) of an {@code HttpServletRequest}. The query string of
* the URL is ignored and matching is case-insensitive or case-sensitive depending on the
* arguments passed into the constructor.
*
* Using a pattern value of {@code /**} or {@code **} is treated as a universal match,
* which will match any request. Patterns which end with {@code /**} (and have no other
* wildcards) are optimized by using a substring match — a pattern of
* {@code /aaa/**} will match {@code /aaa}, {@code /aaa/} and any sub-directories, such as
* {@code /aaa/bbb/ccc}.
*
*
* For all other cases, Spring's {@link AntPathMatcher} is used to perform the match. See
* the Spring documentation for this class for comprehensive information on the syntax
* used.
*
*
* @author Luke Taylor
* @author Rob Winch
* @since 3.1
*
* @see org.springframework.util.AntPathMatcher
*/
public final class AntPathRequestMatcher
implements RequestMatcher, RequestVariablesExtractor {
private static final Log logger = LogFactory.getLog(AntPathRequestMatcher.class);
private static final String MATCH_ALL = "/**";
private final Matcher matcher;
private final String pattern;
private final HttpMethod httpMethod;
private final boolean caseSensitive;
private final UrlPathHelper urlPathHelper;
/**
* Creates a matcher with the specific pattern which will match all HTTP methods in a
* case insensitive manner.
*
* @param pattern the ant pattern to use for matching
*/
public AntPathRequestMatcher(String pattern) {
this(pattern, null);
}
/**
* Creates a matcher with the supplied pattern and HTTP method in a case insensitive
* manner.
*
* @param pattern the ant pattern to use for matching
* @param httpMethod the HTTP method. The {@code matches} method will return false if
* the incoming request doesn't have the same method.
*/
public AntPathRequestMatcher(String pattern, String httpMethod) {
this(pattern, httpMethod, true);
}
/**
* Creates a matcher with the supplied pattern which will match the specified Http
* method
*
* @param pattern the ant pattern to use for matching
* @param httpMethod the HTTP method. The {@code matches} method will return false if
* the incoming request doesn't doesn't have the same method.
* @param caseSensitive true if the matcher should consider case, else false
*/
public AntPathRequestMatcher(String pattern, String httpMethod,
boolean caseSensitive) {
this(pattern, httpMethod, caseSensitive, null);
}
/**
* Creates a matcher with the supplied pattern which will match the specified Http
* method
*
* @param pattern the ant pattern to use for matching
* @param httpMethod the HTTP method. The {@code matches} method will return false if
* the incoming request doesn't doesn't have the same method.
* @param caseSensitive true if the matcher should consider case, else false
* @param urlPathHelper if non-null, will be used for extracting the path from the HttpServletRequest
*/
public AntPathRequestMatcher(String pattern, String httpMethod,
boolean caseSensitive, UrlPathHelper urlPathHelper) {
Assert.hasText(pattern, "Pattern cannot be null or empty");
this.caseSensitive = caseSensitive;
if (pattern.equals(MATCH_ALL) || pattern.equals("**")) {
pattern = MATCH_ALL;
this.matcher = null;
}
else {
// If the pattern ends with {@code /**} and has no other wildcards or path
// variables, then optimize to a sub-path match
if (pattern.endsWith(MATCH_ALL)
&& (pattern.indexOf('?') == -1 && pattern.indexOf('{') == -1
&& pattern.indexOf('}') == -1)
&& pattern.indexOf("*") == pattern.length() - 2) {
this.matcher = new SubpathMatcher(
pattern.substring(0, pattern.length() - 3), caseSensitive);
}
else {
this.matcher = new SpringAntMatcher(pattern, caseSensitive);
}
}
this.pattern = pattern;
this.httpMethod = StringUtils.hasText(httpMethod) ? HttpMethod.valueOf(httpMethod)
: null;
this.urlPathHelper = urlPathHelper;
}
/**
* Returns true if the configured pattern (and HTTP-Method) match those of the
* supplied request.
*
* @param request the request to match against. The ant pattern will be matched
* against the {@code servletPath} + {@code pathInfo} of the request.
*/
@Override
public boolean matches(HttpServletRequest request) {
if (this.httpMethod != null && StringUtils.hasText(request.getMethod())
&& this.httpMethod != valueOf(request.getMethod())) {
if (logger.isDebugEnabled()) {
logger.debug("Request '" + request.getMethod() + " "
+ getRequestPath(request) + "'" + " doesn't match '"
+ this.httpMethod + " " + this.pattern + "'");
}
return false;
}
if (this.pattern.equals(MATCH_ALL)) {
if (logger.isDebugEnabled()) {
logger.debug("Request '" + getRequestPath(request)
+ "' matched by universal pattern '/**'");
}
return true;
}
String url = getRequestPath(request);
if (logger.isDebugEnabled()) {
logger.debug("Checking match of request : '" + url + "'; against '"
+ this.pattern + "'");
}
return this.matcher.matches(url);
}
@Override
public Map extractUriTemplateVariables(HttpServletRequest request) {
if (this.matcher == null || !matches(request)) {
return Collections.emptyMap();
}
String url = getRequestPath(request);
return this.matcher.extractUriTemplateVariables(url);
}
private String getRequestPath(HttpServletRequest request) {
if (this.urlPathHelper != null) {
return this.urlPathHelper.getPathWithinApplication(request);
}
String url = request.getServletPath();
String pathInfo = request.getPathInfo();
if (pathInfo != null) {
url = StringUtils.hasLength(url) ? url + pathInfo : pathInfo;
}
return url;
}
public String getPattern() {
return this.pattern;
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof AntPathRequestMatcher)) {
return false;
}
AntPathRequestMatcher other = (AntPathRequestMatcher) obj;
return this.pattern.equals(other.pattern) && this.httpMethod == other.httpMethod
&& this.caseSensitive == other.caseSensitive;
}
@Override
public int hashCode() {
int code = 31 ^ this.pattern.hashCode();
if (this.httpMethod != null) {
code ^= this.httpMethod.hashCode();
}
return code;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Ant [pattern='").append(this.pattern).append("'");
if (this.httpMethod != null) {
sb.append(", ").append(this.httpMethod);
}
sb.append("]");
return sb.toString();
}
/**
* Provides a save way of obtaining the HttpMethod from a String. If the method is
* invalid, returns null.
*
* @param method the HTTP method to use.
*
* @return the HttpMethod or null if method is invalid.
*/
private static HttpMethod valueOf(String method) {
try {
return HttpMethod.valueOf(method);
}
catch (IllegalArgumentException e) {
}
return null;
}
private static interface Matcher {
boolean matches(String path);
Map extractUriTemplateVariables(String path);
}
private static class SpringAntMatcher implements Matcher {
private final AntPathMatcher antMatcher;
private final String pattern;
private SpringAntMatcher(String pattern, boolean caseSensitive) {
this.pattern = pattern;
this.antMatcher = createMatcher(caseSensitive);
}
@Override
public boolean matches(String path) {
return this.antMatcher.match(this.pattern, path);
}
@Override
public Map extractUriTemplateVariables(String path) {
return this.antMatcher.extractUriTemplateVariables(this.pattern, path);
}
private static AntPathMatcher createMatcher(boolean caseSensitive) {
AntPathMatcher matcher = new AntPathMatcher();
matcher.setTrimTokens(false);
matcher.setCaseSensitive(caseSensitive);
return matcher;
}
}
/**
* Optimized matcher for trailing wildcards
*/
private static class SubpathMatcher implements Matcher {
private final String subpath;
private final int length;
private final boolean caseSensitive;
private SubpathMatcher(String subpath, boolean caseSensitive) {
assert!subpath.contains("*");
this.subpath = caseSensitive ? subpath : subpath.toLowerCase();
this.length = subpath.length();
this.caseSensitive = caseSensitive;
}
@Override
public boolean matches(String path) {
if (!this.caseSensitive) {
path = path.toLowerCase();
}
return path.startsWith(this.subpath)
&& (path.length() == this.length || path.charAt(this.length) == '/');
}
@Override
public Map extractUriTemplateVariables(String path) {
return Collections.emptyMap();
}
}
}