HTTP Cache: Apply all freshness tests to Partial content entries.

BUG=24057
TEST=unittest

Review URL: http://codereview.chromium.org/267122

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29301 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 29 insertions, 4 deletions

diff --git a/net/http/http_cache.cc b/net/http/http_cache.cc
index ded4565..856c41a 100644
--- a/net/http/http_cache.cc
+++ b/net/http/http_cache.cc
@@ -1099,6 +1099,9 @@ bool HttpCache::Transaction::RequiresValidation() {
   if (effective_load_flags_ & LOAD_VALIDATE_CACHE)
     return true;
 
+  if (response_.headers->response_code() == 206 && !enable_range_support_)
+    return true;
+
   if (response_.headers->RequiresValidation(
           response_.request_time, response_.response_time, Time::Now()))
     return true;
diff --git a/net/http/http_response_headers.cc b/net/http/http_response_headers.cc
index 4397939..9348006 100644
--- a/net/http/http_response_headers.cc
+++ b/net/http/http_response_headers.cc
@@ -840,9 +840,6 @@ TimeDelta HttpResponseHeaders::GetFreshnessLifetime(
   //   there are cache-control directives or another header(s) that explicitly
   //   allow it.
   //
-  // Since we do not support byte range requests yet, we exclude 206.  See
-  // HttpCache::Transaction::ShouldPassThrough.
-  //
   // From RFC 2616 section 14.9.4:
   //
   //   When the must-revalidate directive is present in a response received by
@@ -852,7 +849,8 @@ TimeDelta HttpResponseHeaders::GetFreshnessLifetime(
   //   time, if, based solely on the origin server's Expires or max-age value,
   //   the cached response is stale.)
   //
-  if ((response_code_ == 200 || response_code_ == 203) &&
+  if ((response_code_ == 200 || response_code_ == 203 ||
+       response_code_ == 206) &&
       !HasHeaderValue("cache-control", "must-revalidate")) {
     // TODO(darin): Implement a smarter heuristic.
     Time last_modified_value;
diff --git a/net/http/http_response_headers_unittest.cc b/net/http/http_response_headers_unittest.cc
index 448accb..d2ff378 100644
--- a/net/http/http_response_headers_unittest.cc
+++ b/net/http/http_response_headers_unittest.cc
@@ -715,6 +715,18 @@ TEST(HttpResponseHeadersTest, RequiresValidation) {
       "\n",
       false
     },
+    { "HTTP/1.1 203 Non-Authoritative Information\n"
+      "date: Wed, 28 Nov 2007 00:40:11 GMT\n"
+      "last-modified: Wed, 27 Nov 2007 08:00:00 GMT\n"
+      "\n",
+      false
+    },
+    { "HTTP/1.1 206 Partial Content\n"
+      "date: Wed, 28 Nov 2007 00:40:11 GMT\n"
+      "last-modified: Wed, 27 Nov 2007 08:00:00 GMT\n"
+      "\n",
+      false
+    },
     // last-modified heuristic: modified recently
     { "HTTP/1.1 200 OK\n"
       "date: Wed, 28 Nov 2007 00:40:11 GMT\n"
@@ -722,6 +734,18 @@ TEST(HttpResponseHeadersTest, RequiresValidation) {
       "\n",
       true
     },
+    { "HTTP/1.1 203 Non-Authoritative Information\n"
+      "date: Wed, 28 Nov 2007 00:40:11 GMT\n"
+      "last-modified: Wed, 28 Nov 2007 00:40:10 GMT\n"
+      "\n",
+      true
+    },
+    { "HTTP/1.1 206 Partial Content\n"
+      "date: Wed, 28 Nov 2007 00:40:11 GMT\n"
+      "last-modified: Wed, 28 Nov 2007 00:40:10 GMT\n"
+      "\n",
+      true
+    },
     // cached permanent redirect
     { "HTTP/1.1 301 Moved Permanently\n"
       "\n",