Encapsulate full path initialization

spring-web/src/main/java/org/springframework/web/util/pattern/PathPatternParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -17,6 +17,7 @@
 package org.springframework.web.util.pattern;
 
 import org.springframework.http.server.PathContainer;
+import org.springframework.util.StringUtils;
 
 /**
  * Parser for URI path patterns producing {@link PathPattern} instances that can
@@ -103,6 +104,17 @@ public class PathPatternParser {
 	}
 
 
+	/**
+	 * Prepare the given pattern for use in matching to full URL paths.
+	 * <p>By default, prepend a leading slash if needed for non-empty patterns.
+	 * @param pattern the pattern to initialize
+	 * @return the updated pattern
+	 * @since 5.2.25
+	 */
+	public String initFullPathPattern(String pattern) {
+		return (StringUtils.hasLength(pattern) && !pattern.startsWith("/") ? "/" + pattern : pattern);
+	}
+
 	/**
 	 * Process the path pattern content, a character at a time, breaking it into
 	 * path elements around separator boundaries and verifying the structure at each

spring-webflux/src/main/java/org/springframework/web/reactive/function/server/RequestPredicates.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -110,10 +110,9 @@ public abstract class RequestPredicates {
 	 */
 	public static RequestPredicate path(String pattern) {
 		Assert.notNull(pattern, "'pattern' must not be null");
-		if (!pattern.isEmpty() && !pattern.startsWith("/")) {
-			pattern = "/" + pattern;
-		}
-		return pathPredicates(PathPatternParser.defaultInstance).apply(pattern);
+		PathPatternParser parser = PathPatternParser.defaultInstance;
+		pattern = parser.initFullPathPattern(pattern);
+		return pathPredicates(parser).apply(pattern);
 	}
 
 	/**

spring-webflux/src/main/java/org/springframework/web/reactive/handler/AbstractUrlHandlerMapping.java

@@ -29,10 +29,10 @@ import org.springframework.beans.BeansException;
 import org.springframework.http.server.PathContainer;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.StringUtils;
 import org.springframework.web.filter.reactive.ServerHttpObservationFilter;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.util.pattern.PathPattern;
+import org.springframework.web.util.pattern.PathPatternParser;
 
 /**
  * Abstract base class for URL-mapped
@@ -213,8 +213,9 @@ public abstract class AbstractUrlHandlerMapping extends AbstractHandlerMapping {
 		Object resolvedHandler = handler;
 
 		// Parse path pattern
-		urlPath = prependLeadingSlash(urlPath);
-		PathPattern pattern = getPathPatternParser().parse(urlPath);
+		PathPatternParser parser = getPathPatternParser();
+		urlPath = parser.initFullPathPattern(urlPath);
+		PathPattern pattern = parser.parse(urlPath);
 		if (this.handlerMap.containsKey(pattern)) {
 			Object existingHandler = this.handlerMap.get(pattern);
 			if (existingHandler != null && existingHandler != resolvedHandler) {
@@ -242,14 +243,4 @@ public abstract class AbstractUrlHandlerMapping extends AbstractHandlerMapping {
 		return (handler instanceof String ? "'" + handler + "'" : handler.toString());
 	}
 
-
-	private static String prependLeadingSlash(String pattern) {
-		if (StringUtils.hasLength(pattern) && !pattern.startsWith("/")) {
-			return "/" + pattern;
-		}
-		else {
-			return pattern;
-		}
-	}
-
 }

spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceUrlProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -35,7 +35,6 @@ import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 import org.springframework.http.server.PathContainer;
 import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.lang.Nullable;
-import org.springframework.util.StringUtils;
 import org.springframework.web.reactive.handler.SimpleUrlHandlerMapping;
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.util.pattern.PathPattern;
@@ -86,8 +85,9 @@ public class ResourceUrlProvider implements ApplicationListener<ContextRefreshed
 	public void registerHandlers(Map<String, ResourceWebHandler> handlerMap) {
 		this.handlerMap.clear();
 		handlerMap.forEach((rawPattern, resourceWebHandler) -> {
-			rawPattern = prependLeadingSlash(rawPattern);
-			PathPattern pattern = PathPatternParser.defaultInstance.parse(rawPattern);
+			PathPatternParser parser = PathPatternParser.defaultInstance;
+			rawPattern = parser.initFullPathPattern(rawPattern);
+			PathPattern pattern = parser.parse(rawPattern);
 			this.handlerMap.put(pattern, resourceWebHandler);
 		});
 	}
@@ -172,14 +172,4 @@ public class ResourceUrlProvider implements ApplicationListener<ContextRefreshed
 				});
 	}
 
-
-	private static String prependLeadingSlash(String pattern) {
-		if (StringUtils.hasLength(pattern) && !pattern.startsWith("/")) {
-			return "/" + pattern;
-		}
-		else {
-			return pattern;
-		}
-	}
-
 }

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/RequestMappingInfo.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -601,11 +601,9 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 				return Collections.emptyList();
 			}
 			List<PathPattern> result = new ArrayList<>(patterns.length);
-			for (String path : patterns) {
-				if (StringUtils.hasText(path) && !path.startsWith("/")) {
-					path = "/" + path;
-				}
-				result.add(parser.parse(path));
+			for (String pattern : patterns) {
+				pattern = parser.initFullPathPattern(pattern);
+				result.add(parser.parse(pattern));
 			}
 			return result;
 		}

spring-webmvc/src/main/java/org/springframework/web/servlet/function/RequestPredicates.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -109,10 +109,9 @@ public abstract class RequestPredicates {
 	 */
 	public static RequestPredicate path(String pattern) {
 		Assert.notNull(pattern, "'pattern' must not be null");
-		if (!pattern.isEmpty() && !pattern.startsWith("/")) {
-			pattern = "/" + pattern;
-		}
-		return pathPredicates(PathPatternParser.defaultInstance).apply(pattern);
+		PathPatternParser parser = PathPatternParser.defaultInstance;
+		pattern = parser.initFullPathPattern(pattern);
+		return pathPredicates(parser).apply(pattern);
 	}
 
 	/**

spring-webmvc/src/main/java/org/springframework/web/servlet/handler/HandlerMappingIntrospector.java

@@ -51,6 +51,7 @@ import org.springframework.web.servlet.HandlerInterceptor;
 import org.springframework.web.servlet.HandlerMapping;
 import org.springframework.web.util.ServletRequestPathUtils;
 import org.springframework.web.util.UrlPathHelper;
+import org.springframework.web.util.pattern.PathPatternParser;
 
 /**
  * Helper class to get information from the {@code HandlerMapping} that would
@@ -309,10 +310,15 @@ public class HandlerMappingIntrospector
 					ServletRequestPathUtils.PATH_ATTRIBUTE : UrlPathHelper.PATH_ATTRIBUTE);
 		}
 
+		@Override
+		public PathPatternParser getPatternParser() {
+			return this.delegate.getPatternParser();
+		}
+
 		@Nullable
 		@Override
 		public RequestMatchResult match(HttpServletRequest request, String pattern) {
-			pattern = (StringUtils.hasLength(pattern) && !pattern.startsWith("/") ? "/" + pattern : pattern);
+			pattern = initFullPathPattern(pattern);
 			Object previousPath = request.getAttribute(this.pathAttributeName);
 			request.setAttribute(this.pathAttributeName, this.lookupPath);
 			try {
@@ -323,6 +329,11 @@ public class HandlerMappingIntrospector
 			}
 		}
 
+		private String initFullPathPattern(String pattern) {
+			PathPatternParser parser = (getPatternParser() != null ? getPatternParser() : PathPatternParser.defaultInstance);
+			return parser.initFullPathPattern(pattern);
+		}
+
 		@Nullable
 		@Override
 		public HandlerExecutionChain getHandler(HttpServletRequest request) throws Exception {

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PathPatternsRequestCondition.java

@@ -79,11 +79,9 @@ public final class PathPatternsRequestCondition extends AbstractRequestCondition
 			return EMPTY_PATH_PATTERN;
 		}
 		SortedSet<PathPattern> result = new TreeSet<>();
-		for (String path : patterns) {
-			if (StringUtils.hasText(path) && !path.startsWith("/")) {
-				path = "/" + path;
-			}
-			result.add(parser.parse(path));
+		for (String pattern : patterns) {
+			pattern = parser.initFullPathPattern(pattern);
+			result.add(parser.parse(pattern));
 		}
 		return result;
 	}

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PatternsRequestCondition.java

@@ -35,6 +35,7 @@ import org.springframework.util.PathMatcher;
 import org.springframework.util.StringUtils;
 import org.springframework.web.util.UrlPathHelper;
 import org.springframework.web.util.pattern.PathPattern;
+import org.springframework.web.util.pattern.PathPatternParser;
 
 /**
  * A logical disjunction (' || ') request condition that matches a request
@@ -158,9 +159,7 @@ public class PatternsRequestCondition extends AbstractRequestCondition<PatternsR
 		}
 		Set<String> result = new LinkedHashSet<>(patterns.length);
 		for (String pattern : patterns) {
-			if (StringUtils.hasLength(pattern) && !pattern.startsWith("/")) {
-				pattern = "/" + pattern;
-			}
+			pattern = PathPatternParser.defaultInstance.initFullPathPattern(pattern);
 			result.add(pattern);
 		}
 		return result;

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/MvcUriComponentsBuilder.java

@@ -64,6 +64,7 @@ import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping;
 import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
 import org.springframework.web.util.UriComponentsBuilder;
+import org.springframework.web.util.pattern.PathPatternParser;
 
 /**
  * Creates instances of {@link org.springframework.web.util.UriComponentsBuilder}
@@ -544,10 +545,8 @@ public class MvcUriComponentsBuilder {
 		String typePath = getClassMapping(controllerType);
 		String methodPath = getMethodMapping(method);
 		String path = pathMatcher.combine(typePath, methodPath);
-		if (StringUtils.hasLength(path) && !path.startsWith("/")) {
-			path = "/" + path;
-		}
-		else if (!StringUtils.hasText(prefix + path)) {
+		path = PathPatternParser.defaultInstance.initFullPathPattern(path);
+		if (!StringUtils.hasText(prefix + path)) {
 			path = "/";
 		}
 		builder.path(path);