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-rw-r--r--include/mbgl/storage/response.hpp10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/mbgl/storage/response.hpp b/include/mbgl/storage/response.hpp
index 32fe4e0..711f008 100644
--- a/include/mbgl/storage/response.hpp
+++ b/include/mbgl/storage/response.hpp
@@ -27,6 +27,10 @@ public:
// This is set to true for 304 Not Modified responses.
bool notModified = false;
+ // This is set to true when the server requested that no expired resources be used by
+ // specifying "Cache-Control: must-revalidate".
+ bool mustRevalidate = false;
+
// The actual data of the response. Present only for non-error, non-notModified responses.
std::shared_ptr<const std::string> data;
@@ -37,6 +41,12 @@ public:
bool isFresh() const {
return expires ? *expires > util::now() : !error;
}
+
+ // Indicates whether we are allowed to use this response according to HTTP caching rules.
+ // It may or may not be stale.
+ bool isUsable() const {
+ return !mustRevalidate || (expires && *expires > util::now());
+ }
};
class Response::Error {