Fix AntPathMatcher multiple segments matching

Prior to this commit, the new match algorithm wouldn't work for multiple
consecutive path separators.
This commit separately matches path segments and path separators and
allows for multiple, consecutive path separators.

Issue: SPR-14141

Author: bclozel

spring-core/src/main/java/org/springframework/util/AntPathMatcher.java

@@ -317,34 +317,42 @@ private boolean isPotentialMatch(String path, String[] pattDirs) {
 		char[] pathChars = path.toCharArray();
 		int pos = 0;
 		for (String pattDir : pattDirs) {
-			int count = countStartsWith(pathChars, pos, this.pathSeparator, false);
-			pos += (count == this.pathSeparator.length() ? count : 0);
-			count = countStartsWith(pathChars, pos, pattDir, true);
-			if (count < pattDir.length()) {
-				if (count > 0) {
+			int skipped = skipSeparator(path, pos, this.pathSeparator);
+			pos += skipped;
+			skipped = skipSegment(pathChars, pos, pattDir);
+			if (skipped < pattDir.length()) {
+				if (skipped > 0) {
 					return true;
 				}
 				return (pattDir.length() > 0) && isWildcardChar(pattDir.charAt(0));
 			}
-			pos += count;
+			pos += skipped;
 		}
 		return true;
 	}
 
-	private int countStartsWith(char[] chars, int pos, String prefix, boolean stopOnWildcard) {
-		int count = 0;
+	private int skipSegment(char[] chars, int pos, String prefix) {
+		int skipped = 0;
 		for (char c : prefix.toCharArray()) {
-			if (stopOnWildcard && isWildcardChar(c)) {
-				return count;
+			if (isWildcardChar(c)) {
+				return skipped;
 			}
-			if (pos + count >= chars.length) {
+			else if (pos + skipped >= chars.length) {
 				return 0;
 			}
-			if (chars[pos + count] == c) {
-				count++;
+			else if (chars[pos + skipped] == c) {
+				skipped++;
 			}
 		}
-		return count;
+		return skipped;
+	}
+
+	private int skipSeparator(String path, int pos, String separator) {
+		int skipped = 0;
+		while (path.startsWith(separator, pos + skipped)) {
+			skipped += separator.length();
+		}
+		return skipped;
 	}
 
 	private boolean isWildcardChar(char c) {

spring-core/src/test/java/org/springframework/util/AntPathMatcherTests.java

@@ -53,6 +53,7 @@ public void match() {
 		// test exact matching
 		assertTrue(pathMatcher.match("test", "test"));
 		assertTrue(pathMatcher.match("/test", "/test"));
+		assertTrue(pathMatcher.match("http://example.org", "http://example.org")); // SPR-14141
 		assertFalse(pathMatcher.match("/test.jpg", "test.jpg"));
 		assertFalse(pathMatcher.match("test", "/test"));
 		assertFalse(pathMatcher.match("/test", "test"));