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Fix for protocol recommendation: 

"304 Not Modified ... If the conditional GET used a strong cache
validator (see section 13.3.3), the response SHOULD NOT include
other entity-headers."

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3.5


git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1058762 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jonathan Moore 2011-01-13 22:07:50 +00:00
parent bdf4174033
commit 17aa988f41
3 changed files with 316 additions and 0 deletions
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14
httpclient-cache/src/main/java/org/apache/http/impl/client/cache/ResponseProtocolCompliance.java vendored
View File

@ -83,6 +83,8 @@ class ResponseProtocolCompliance {
ensure200ForOPTIONSRequestWithNoBodyHasContentLengthZero(request, response);
ensure206ContainsDateHeader(response);
ensure304DoesNotContainExtraEntityHeaders(response);
identityIsNotUsedInContentEncoding(response);
@ -212,6 +214,18 @@ class ResponseProtocolCompliance {
}
}
private void ensure304DoesNotContainExtraEntityHeaders(HttpResponse response) {
String[] disallowedEntityHeaders = { "Allow", "Content-Encoding",
"Content-Language", "Content-Length", "Content-MD5",
"Content-Range", "Content-Type", "Last-Modified"
};
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_MODIFIED) {
for(String hdr : disallowedEntityHeaders) {
response.removeHeaders(hdr);
}
}
}
private boolean backendResponseMustNotHaveBody(HttpRequest request, HttpResponse backendResponse) {
return HeaderConstants.HEAD_METHOD.equals(request.getRequestLine().getMethod())
|| backendResponse.getStatusLine().getStatusCode() == HttpStatus.SC_NO_CONTENT

10
httpclient-cache/src/test/java/org/apache/http/impl/client/cache/HttpTestUtils.java vendored
View File

@ -76,6 +76,16 @@ public class HttpTestUtils {
"If-None-Match", "If-Range", "If-Unmodified-Since", "Last-Modified", "Location",
"Max-Forwards", "Proxy-Authorization", "Range", "Referer", "Retry-After", "Server",
"User-Agent", "Vary" };
/*
* "Entity-header fields define metainformation about the entity-body or,
* if no body is present, about the resource identified by the request."
*
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec7.html#sec7.1
*/
public static final String[] ENTITY_HEADERS = { "Allow", "Content-Encoding",
"Content-Language", "Content-Length", "Content-Location", "Content-MD5",
"Content-Range", "Content-Type", "Expires", "Last-Modified" };
/*
* Determines whether the given header name is considered a hop-by-hop

292
httpclient-cache/src/test/java/org/apache/http/impl/client/cache/TestProtocolRecommendations.java vendored
View File

@ -44,6 +44,7 @@ import org.apache.http.HttpStatus;
import org.apache.http.HttpVersion;
import static org.apache.http.impl.cookie.DateUtils.formatDate;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.message.BasicHttpEntityEnclosingRequest;
import org.apache.http.message.BasicHttpRequest;
@ -64,6 +65,7 @@ public class TestProtocolRecommendations extends AbstractProtocolTest {
private Date tenSecondsFromNow;
private Date now;
private Date tenSecondsAgo;
private Date twoMinutesAgo;
@Override
@Before
@ -71,6 +73,7 @@ public class TestProtocolRecommendations extends AbstractProtocolTest {
super.setUp();
now = new Date();
tenSecondsAgo = new Date(now.getTime() - 10 * 1000L);
twoMinutesAgo = new Date(now.getTime() - 2 * 60 * 1000L);
tenSecondsFromNow = new Date(now.getTime() + 10 * 1000L);
}
@ -100,6 +103,294 @@ public class TestProtocolRecommendations extends AbstractProtocolTest {
assertFalse(foundIdentity);
}
/*
* "304 Not Modified. ... If the conditional GET used a strong cache
* validator (see section 13.3.3), the response SHOULD NOT include
* other entity-headers."
*
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3.5
*/
private void cacheGenerated304ForValidatorShouldNotContainEntityHeader(
String headerName, String headerValue, String validatorHeader,
String validator, String conditionalHeader) throws Exception,
IOException {
HttpRequest req1 = HttpTestUtils.makeDefaultRequest();
HttpResponse resp1 = HttpTestUtils.make200Response();
resp1.setHeader("Cache-Control","max-age=3600");
resp1.setHeader(validatorHeader, validator);
resp1.setHeader(headerName, headerValue);
backendExpectsAnyRequest().andReturn(resp1);
HttpRequest req2 = HttpTestUtils.makeDefaultRequest();
req2.setHeader(conditionalHeader, validator);
replayMocks();
impl.execute(host, req1);
HttpResponse result = impl.execute(host, req2);
verifyMocks();
if (HttpStatus.SC_NOT_MODIFIED == result.getStatusLine().getStatusCode()) {
assertNull(result.getFirstHeader(headerName));
}
}
private void cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
String headerName, String headerValue) throws Exception,
IOException {
cacheGenerated304ForValidatorShouldNotContainEntityHeader(headerName,
headerValue, "ETag", "\"etag\"", "If-None-Match");
}
private void cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
String headerName, String headerValue) throws Exception,
IOException {
cacheGenerated304ForValidatorShouldNotContainEntityHeader(headerName,
headerValue, "Last-Modified", formatDate(twoMinutesAgo),
"If-Modified-Since");
}
@Test
public void cacheGenerated304ForStrongEtagValidatorShouldNotContainAllow()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Allow", "GET,HEAD");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainAllow()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Allow", "GET,HEAD");
}
@Test
public void cacheGenerated304ForStrongEtagValidatorShouldNotContainContentEncoding()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Content-Encoding", "gzip");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainContentEncoding()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Content-Encoding", "gzip");
}
@Test
public void cacheGenerated304ForStrongEtagValidatorShouldNotContainContentLanguage()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Content-Language", "en");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainContentLanguage()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Content-Language", "en");
}
@Test
public void cacheGenerated304ForStrongValidatorShouldNotContainContentLength()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Content-Length", "128");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainContentLength()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Content-Length", "128");
}
@Test
public void cacheGenerated304ForStrongValidatorShouldNotContainContentMD5()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Content-MD5", "Q2hlY2sgSW50ZWdyaXR5IQ==");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainContentMD5()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Content-MD5", "Q2hlY2sgSW50ZWdyaXR5IQ==");
}
private void cacheGenerated304ForStrongValidatorShouldNotContainContentRange(
String validatorHeader, String validator, String conditionalHeader)
throws Exception, IOException, ClientProtocolException {
HttpRequest req1 = HttpTestUtils.makeDefaultRequest();
req1.setHeader("Range","bytes=0-127");
HttpResponse resp1 = new BasicHttpResponse(HttpVersion.HTTP_1_1, HttpStatus.SC_PARTIAL_CONTENT, "Partial Content");
resp1.setHeader("Cache-Control","max-age=3600");
resp1.setHeader(validatorHeader, validator);
resp1.setHeader("Content-Range", "bytes 0-127/256");
backendExpectsAnyRequest().andReturn(resp1);
HttpRequest req2 = HttpTestUtils.makeDefaultRequest();
req2.setHeader("If-Range", validator);
req2.setHeader("Range","bytes=0-127");
req2.setHeader(conditionalHeader, validator);
HttpResponse resp2 = new BasicHttpResponse(HttpVersion.HTTP_1_1, HttpStatus.SC_NOT_MODIFIED, "Not Modified");
resp2.setHeader("Date", formatDate(now));
resp2.setHeader(validatorHeader, validator);
// cache module does not currently deal with byte ranges, but we want
// this test to work even if it does some day
Capture<HttpRequest> cap = new Capture<HttpRequest>();
expect(mockBackend.execute(same(host), capture(cap), (HttpContext)isNull()))
.andReturn(resp2).times(0,1);
replayMocks();
impl.execute(host, req1);
HttpResponse result = impl.execute(host, req2);
verifyMocks();
if (!cap.hasCaptured()
&& HttpStatus.SC_NOT_MODIFIED == result.getStatusLine().getStatusCode()) {
// cache generated a 304
assertNull(result.getFirstHeader("Content-Range"));
}
}
@Test
public void cacheGenerated304ForStrongEtagValidatorShouldNotContainContentRange()
throws Exception {
cacheGenerated304ForStrongValidatorShouldNotContainContentRange(
"ETag", "\"etag\"", "If-None-Match");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainContentRange()
throws Exception {
cacheGenerated304ForStrongValidatorShouldNotContainContentRange(
"Last-Modified", formatDate(twoMinutesAgo), "If-Modified-Since");
}
@Test
public void cacheGenerated304ForStrongEtagValidatorShouldNotContainContentType()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Content-Type", "text/html");
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainContentType()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Content-Type", "text/html");
}
@Test
public void cacheGenerated304ForStrongEtagValidatorShouldNotContainLastModified()
throws Exception {
cacheGenerated304ForStrongETagValidatorShouldNotContainEntityHeader(
"Last-Modified", formatDate(tenSecondsAgo));
}
@Test
public void cacheGenerated304ForStrongDateValidatorShouldNotContainLastModified()
throws Exception {
cacheGenerated304ForStrongDateValidatorShouldNotContainEntityHeader(
"Last-Modified", formatDate(twoMinutesAgo));
}
private void shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
String entityHeader, String entityHeaderValue) throws Exception,
IOException {
HttpRequest req = HttpTestUtils.makeDefaultRequest();
req.setHeader("If-None-Match", "\"etag\"");
HttpResponse resp = new BasicHttpResponse(HttpVersion.HTTP_1_1, HttpStatus.SC_NOT_MODIFIED, "Not Modified");
resp.setHeader("Date", formatDate(now));
resp.setHeader("Etag", "\"etag\"");
resp.setHeader(entityHeader, entityHeaderValue);
backendExpectsAnyRequest().andReturn(resp);
replayMocks();
HttpResponse result = impl.execute(host, req);
verifyMocks();
assertNull(result.getFirstHeader(entityHeader));
}
@Test
public void shouldStripAllowFromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Allow", "GET,HEAD");
}
@Test
public void shouldStripContentEncodingFromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Content-Encoding", "gzip");
}
@Test
public void shouldStripContentLanguageFromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Content-Language", "en");
}
@Test
public void shouldStripContentLengthFromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Content-Length", "128");
}
@Test
public void shouldStripContentMD5FromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Content-MD5", "Q2hlY2sgSW50ZWdyaXR5IQ==");
}
@Test
public void shouldStripContentTypeFromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Content-Type", "text/html;charset=utf-8");
}
@Test
public void shouldStripContentRangeFromOrigin304ResponseToStringValidation()
throws Exception {
HttpRequest req = HttpTestUtils.makeDefaultRequest();
req.setHeader("If-Range","\"etag\"");
req.setHeader("Range","bytes=0-127");
HttpResponse resp = new BasicHttpResponse(HttpVersion.HTTP_1_1, HttpStatus.SC_NOT_MODIFIED, "Not Modified");
resp.setHeader("Date", formatDate(now));
resp.setHeader("ETag", "\"etag\"");
resp.setHeader("Content-Range", "bytes 0-127/256");
backendExpectsAnyRequest().andReturn(resp);
replayMocks();
HttpResponse result = impl.execute(host, req);
verifyMocks();
assertNull(result.getFirstHeader("Content-Range"));
}
@Test
public void shouldStripLastModifiedFromOrigin304ResponseToStrongValidation()
throws Exception {
shouldStripEntityHeaderFromOrigin304ResponseToStrongValidation(
"Last-Modified", formatDate(twoMinutesAgo));
}
/*
* "For this reason, a cache SHOULD NOT return a stale response if the
* client explicitly requests a first-hand or fresh one, unless it is
@ -1461,4 +1752,5 @@ public class TestProtocolRecommendations extends AbstractProtocolTest {
assertTrue(HttpTestUtils.semanticallyTransparent(resp1, result));
}
}