diff --git a/spring-web/src/main/java/org/springframework/http/server/ServletServerHttpResponse.java b/spring-web/src/main/java/org/springframework/http/server/ServletServerHttpResponse.java
index a54112db9b..478022f69c 100644
--- a/spring-web/src/main/java/org/springframework/http/server/ServletServerHttpResponse.java
+++ b/spring-web/src/main/java/org/springframework/http/server/ServletServerHttpResponse.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -39,6 +39,7 @@ import org.springframework.util.CollectionUtils;
*/
public class ServletServerHttpResponse implements ServerHttpResponse {
+ /** Checking for Servlet 3.0+ HttpServletResponse.getHeader(String) */
private static final boolean servlet3Present =
ClassUtils.hasMethod(HttpServletResponse.class, "getHeader", String.class);
@@ -57,7 +58,7 @@ public class ServletServerHttpResponse implements ServerHttpResponse {
* @param servletResponse the servlet response
*/
public ServletServerHttpResponse(HttpServletResponse servletResponse) {
- Assert.notNull(servletResponse, "'servletResponse' must not be null");
+ Assert.notNull(servletResponse, "HttpServletResponse must not be null");
this.servletResponse = servletResponse;
this.headers = (servlet3Present ? new ServletResponseHttpHeaders() : new HttpHeaders());
}
diff --git a/spring-web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java b/spring-web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java
index 3807fdf6ff..c734e08f6c 100644
--- a/spring-web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java
+++ b/spring-web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java
@@ -56,9 +56,9 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
private static final String METHOD_HEAD = "HEAD";
- /** Checking for Servlet 3.0+ HttpServletResponse.getStatus() */
- private static final boolean responseGetStatusAvailable =
- ClassUtils.hasMethod(HttpServletResponse.class, "getStatus");
+ /** Checking for Servlet 3.0+ HttpServletResponse.getHeader(String) */
+ private static final boolean servlet3Present =
+ ClassUtils.hasMethod(HttpServletResponse.class, "getHeader", String.class);
private boolean notModified = false;
@@ -80,6 +80,7 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
super(request, response);
}
+
@Override
public Object getNativeRequest() {
return getRequest();
@@ -174,6 +175,7 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
return getRequest().isSecure();
}
+
@Override
public boolean checkNotModified(long lastModifiedTimestamp) {
HttpServletResponse response = getResponse();
@@ -184,7 +186,7 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
if (this.notModified && supportsNotModifiedStatus()) {
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
}
- if (response.getHeader(HEADER_LAST_MODIFIED) == null) {
+ if (isHeaderAbsent(response, HEADER_LAST_MODIFIED)) {
response.setDateHeader(HEADER_LAST_MODIFIED, lastModifiedTimestamp);
}
}
@@ -193,6 +195,75 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
return this.notModified;
}
+ @Override
+ public boolean checkNotModified(String etag) {
+ HttpServletResponse response = getResponse();
+ if (StringUtils.hasLength(etag) && !this.notModified) {
+ if (isCompatibleWithConditionalRequests(response)) {
+ etag = addEtagPadding(etag);
+ this.notModified = isEtagNotModified(etag);
+ if (response != null) {
+ if (this.notModified && supportsNotModifiedStatus()) {
+ response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
+ }
+ if (isHeaderAbsent(response, HEADER_ETAG)) {
+ response.setHeader(HEADER_ETAG, etag);
+ }
+ }
+ }
+ }
+ return this.notModified;
+ }
+
+ @Override
+ public boolean checkNotModified(String etag, long lastModifiedTimestamp) {
+ HttpServletResponse response = getResponse();
+ if (StringUtils.hasLength(etag) && !this.notModified) {
+ if (isCompatibleWithConditionalRequests(response)) {
+ etag = addEtagPadding(etag);
+ this.notModified = isEtagNotModified(etag) && isTimestampNotModified(lastModifiedTimestamp);
+ if (response != null) {
+ if (this.notModified && supportsNotModifiedStatus()) {
+ response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
+ }
+ if (isHeaderAbsent(response, HEADER_ETAG)) {
+ response.setHeader(HEADER_ETAG, etag);
+ }
+ if (isHeaderAbsent(response, HEADER_LAST_MODIFIED)) {
+ response.setDateHeader(HEADER_LAST_MODIFIED, lastModifiedTimestamp);
+ }
+ }
+ }
+ }
+ return this.notModified;
+ }
+
+ public boolean isNotModified() {
+ return this.notModified;
+ }
+
+
+ private boolean isCompatibleWithConditionalRequests(HttpServletResponse response) {
+ if (response == null || !servlet3Present) {
+ // Can't check response.getStatus() - let's assume we're good
+ return true;
+ }
+ return HttpStatus.valueOf(response.getStatus()).is2xxSuccessful();
+ }
+
+ private boolean isHeaderAbsent(HttpServletResponse response, String header) {
+ if (response == null || !servlet3Present) {
+ // Can't check response.getHeader(header) - let's assume it's not set
+ return true;
+ }
+ return (response.getHeader(header) == null);
+ }
+
+ private boolean supportsNotModifiedStatus() {
+ String method = getRequest().getMethod();
+ return (METHOD_GET.equals(method) || METHOD_HEAD.equals(method));
+ }
+
@SuppressWarnings("deprecation")
private boolean isTimestampNotModified(long lastModifiedTimestamp) {
long ifModifiedSince = -1;
@@ -216,32 +287,22 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
return (ifModifiedSince >= (lastModifiedTimestamp / 1000 * 1000));
}
- @Override
- public boolean checkNotModified(String etag) {
- HttpServletResponse response = getResponse();
- if (StringUtils.hasLength(etag) && !this.notModified) {
- if (isCompatibleWithConditionalRequests(response)) {
- etag = addEtagPadding(etag);
- this.notModified = isETagNotModified(etag);
- if (response != null) {
- if (this.notModified && supportsNotModifiedStatus()) {
- response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
- }
- if (response.getHeader(HEADER_ETAG) == null) {
- response.setHeader(HEADER_ETAG, etag);
+ private boolean isEtagNotModified(String etag) {
+ if (StringUtils.hasLength(etag)) {
+ String ifNoneMatch = getRequest().getHeader(HEADER_IF_NONE_MATCH);
+ if (StringUtils.hasLength(ifNoneMatch)) {
+ String[] clientEtags = StringUtils.delimitedListToStringArray(ifNoneMatch, ",", " ");
+ for (String clientEtag : clientEtags) {
+ // compare weak/strong ETag as per https://tools.ietf.org/html/rfc7232#section-2.3
+ if (StringUtils.hasLength(clientEtag) &&
+ (clientEtag.replaceFirst("^W/", "").equals(etag.replaceFirst("^W/", "")) ||
+ clientEtag.equals("*"))) {
+ return true;
}
}
}
}
- return this.notModified;
- }
-
- private boolean isCompatibleWithConditionalRequests(HttpServletResponse response) {
- if (response == null || !responseGetStatusAvailable) {
- // Can't check response.getStatus() - let's assume we're good
- return true;
- }
- return HttpStatus.valueOf(response.getStatus()).is2xxSuccessful();
+ return false;
}
private String addEtagPadding(String etag) {
@@ -251,55 +312,6 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
return etag;
}
- private boolean isETagNotModified(String etag) {
- if (StringUtils.hasLength(etag)) {
- String ifNoneMatch = getRequest().getHeader(HEADER_IF_NONE_MATCH);
- if (StringUtils.hasLength(ifNoneMatch)) {
- String[] clientETags = StringUtils.delimitedListToStringArray(ifNoneMatch, ",", " ");
- for (String clientETag : clientETags) {
- // compare weak/strong ETags as per https://tools.ietf.org/html/rfc7232#section-2.3
- if (StringUtils.hasLength(clientETag) &&
- (clientETag.replaceFirst("^W/", "").equals(etag.replaceFirst("^W/", ""))
- || clientETag.equals("*"))) {
- return true;
- }
- }
- }
- }
- return false;
- }
-
- private boolean supportsNotModifiedStatus() {
- String method = getRequest().getMethod();
- return (METHOD_GET.equals(method) || METHOD_HEAD.equals(method));
- }
-
- @Override
- public boolean checkNotModified(String etag, long lastModifiedTimestamp) {
- HttpServletResponse response = getResponse();
- if (StringUtils.hasLength(etag) && !this.notModified) {
- if (isCompatibleWithConditionalRequests(response)) {
- etag = addEtagPadding(etag);
- this.notModified = isETagNotModified(etag) && isTimestampNotModified(lastModifiedTimestamp);
- if (response != null) {
- if (this.notModified && supportsNotModifiedStatus()) {
- response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
- }
- if (response.getHeader(HEADER_ETAG) == null) {
- response.setHeader(HEADER_ETAG, etag);
- }
- if (response.getHeader(HEADER_LAST_MODIFIED) == null) {
- response.setDateHeader(HEADER_LAST_MODIFIED, lastModifiedTimestamp);
- }
- }
- }
- }
- return this.notModified;
- }
-
- public boolean isNotModified() {
- return this.notModified;
- }
@Override
public String getDescription(boolean includeClientInfo) {
diff --git a/spring-web/src/main/java/org/springframework/web/context/request/WebRequest.java b/spring-web/src/main/java/org/springframework/web/context/request/WebRequest.java
index bcaaffe168..cea9fa70af 100644
--- a/spring-web/src/main/java/org/springframework/web/context/request/WebRequest.java
+++ b/spring-web/src/main/java/org/springframework/web/context/request/WebRequest.java
@@ -27,6 +27,7 @@ import java.util.Map;
* not for actual handling of the request.
*
* @author Juergen Hoeller
+ * @author Brian Clozel
* @since 2.0
* @see WebRequestInterceptor
*/
@@ -194,8 +195,8 @@ public interface WebRequest extends RequestAttributes {
* Check whether the request qualifies as not modified given the
* supplied {@code ETag} (entity tag) and last-modified timestamp,
* as determined by the application.
- * This will also transparently set the "Etag" and "Last-Modified" response headers,
- * for both the modified case and the not-modified case.
+ *
This will also transparently set the "ETag" and "Last-Modified"
+ * response headers, for both the modified case and the not-modified case.
*
Typical usage:
*
* public String myHandleMethod(WebRequest webRequest, Model model) {
diff --git a/spring-web/src/main/java/org/springframework/web/filter/ShallowEtagHeaderFilter.java b/spring-web/src/main/java/org/springframework/web/filter/ShallowEtagHeaderFilter.java
index 9c19c60bec..805697a3b0 100644
--- a/spring-web/src/main/java/org/springframework/web/filter/ShallowEtagHeaderFilter.java
+++ b/spring-web/src/main/java/org/springframework/web/filter/ShallowEtagHeaderFilter.java
@@ -58,13 +58,14 @@ public class ShallowEtagHeaderFilter extends OncePerRequestFilter {
private static final String DIRECTIVE_NO_STORE = "no-store";
- /** Checking for Servlet 3.0+ HttpServletResponse.getHeader(String) */
- private static final boolean responseGetHeaderAvailable =
- ClassUtils.hasMethod(HttpServletResponse.class, "getHeader", String.class);
-
private static final String STREAMING_ATTRIBUTE = ShallowEtagHeaderFilter.class.getName() + ".STREAMING";
+ /** Checking for Servlet 3.0+ HttpServletResponse.getHeader(String) */
+ private static final boolean servlet3Present =
+ ClassUtils.hasMethod(HttpServletResponse.class, "getHeader", String.class);
+
+
/**
* The default value is "false" so that the filter may delay the generation of
* an ETag until the last asynchronously dispatched thread.
@@ -144,7 +145,10 @@ public class ShallowEtagHeaderFilter extends OncePerRequestFilter {
int responseStatusCode, InputStream inputStream) {
if (responseStatusCode >= 200 && responseStatusCode < 300 && HttpMethod.GET.name().equals(request.getMethod())) {
- String cacheControl = (responseGetHeaderAvailable ? response.getHeader(HEADER_CACHE_CONTROL) : null);
+ String cacheControl = null;
+ if (servlet3Present) {
+ cacheControl = response.getHeader(HEADER_CACHE_CONTROL);
+ }
if (cacheControl == null || !cacheControl.contains(DIRECTIVE_NO_STORE)) {
return true;
}