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Improve UriComponents.sanitizeSource() #25401

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merged 1 commit into from Aug 10, 2020
Merged

Improve UriComponents.sanitizeSource() #25401

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7 changes: 4 additions & 3 deletions spring-web/src/main/java/org/springframework/web/util/UriComponents.java
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Expand Up @@ -276,7 +276,8 @@ static String expandUriComponent(@Nullable String source, UriTemplateVariables u
*/
private static String sanitizeSource(String source) {
int level = 0;
StringBuilder sb = new StringBuilder();
int lastCharIndex = 0;
char[] chars = new char[source.length()];
for (char c : source.toCharArray()) {
if (c == '{') {
level++;
Expand All @@ -287,9 +288,9 @@ private static String sanitizeSource(String source) {
if (level > 1 || (level == 1 && c == '}')) {
continue;
}
sb.append(c);
chars[lastCharIndex++] = c;
}
return sb.toString();
return new String(chars, 0, lastCharIndex);
}

private static String getVariableName(String match) {
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