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Avoid expensive assertions in web resource resolution

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Closes gh-22955
This commit is contained in:
Juergen Hoeller
2019-05-13 13:28:07 +02:00
parent 9ad9025619
commit ed3df72d67
1 changed files with 7 additions and 6 deletions
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13
spring-webmvc/src/main/java/org/springframework/web/servlet/resource/ResourceUrlEncodingFilter.java
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@@ -84,7 +84,6 @@ public class ResourceUrlEncodingFilter extends GenericFilterBean {
initLookupPath((ResourceUrlProvider) value);
}
}
}
private void initLookupPath(ResourceUrlProvider urlProvider) {
@@ -94,10 +93,12 @@ public class ResourceUrlEncodingFilter extends GenericFilterBean {
String requestUri = pathHelper.getRequestUri(this);
String lookupPath = pathHelper.getLookupPathForRequest(this);
this.indexLookupPath = requestUri.lastIndexOf(lookupPath);
Assert.isTrue(this.indexLookupPath != -1,
"Failed to find lookupPath '" + lookupPath + "' within requestUri '" + requestUri + ". " +
"Does the path have invalid encoded characters " +
"for characterEncoding=" + getRequest().getCharacterEncoding() + "?");
if (this.indexLookupPath == -1) {
throw new IllegalStateException(
"Failed to find lookupPath '" + lookupPath + "' within requestUri '" + requestUri + "'. " +
"Does the path have invalid encoded characters for characterEncoding '" +
getRequest().getCharacterEncoding() + "'?");
}
this.prefixLookupPath = requestUri.substring(0, this.indexLookupPath);
if ("/".equals(lookupPath) && !"/".equals(requestUri)) {
String contextPath = pathHelper.getContextPath(this);
@@ -112,7 +113,7 @@ public class ResourceUrlEncodingFilter extends GenericFilterBean {
public String resolveUrlPath(String url) {
if (this.resourceUrlProvider == null) {
logger.trace("ResourceUrlProvider not available via request attribute " +
"ResourceUrlProviderExposingInterceptor.RESOURCE_URL_PROVIDER_ATTR");
ResourceUrlProviderExposingInterceptor.RESOURCE_URL_PROVIDER_ATTR);
return null;
}
if (this.indexLookupPath != null && url.startsWith(this.prefixLookupPath)) {