parse cache-control and last-modified headers

include/mbgl/platform/platform.hpp

@@ -1,10 +1,11 @@
 #ifndef MBGL_PLATFORM_PLATFORM
 #define MBGL_PLATFORM_PLATFORM
 
+#include <mbgl/platform/response.hpp>
+
 #include <mbgl/util/uv.hpp>
 
 #include <memory>
-#include <functional>
 #include <string>
 
 namespace mbgl {
@@ -12,14 +13,6 @@ namespace platform {
 
 class Request;
 
-struct Response {
-    Response(std::function<void(Response *)> callback) : callback(callback) {}
-    int16_t code = -1;
-    std::string body;
-    std::string error_message;
-    std::function<void(Response *)> callback;
-};
-
 // Makes an HTTP request of a URL, preferrably on a background thread, and calls a function with the
 // results in the original thread (which runs the libuv loop).
 // If the loop pointer is NULL, the callback function will be called on an arbitrary thread.

include/mbgl/platform/response.hpp

@@ -0,0 +1,29 @@
+#ifndef MBGL_PLATFORM_RESPONSE
+#define MBGL_PLATFORM_RESPONSE
+
+#include <string>
+#include <functional>
+#include <ctime>
+
+#include <mbgl/util/noncopyable.hpp>
+
+namespace mbgl {
+namespace platform {
+
+struct Response : private util::noncopyable {
+    Response(std::function<void(Response *)> callback) : callback(callback) {}
+    int16_t code = -1;
+    std::string body;
+    std::string error_message;
+    std::time_t modified;
+    std::time_t expires;
+    std::function<void(Response *)> callback;
+
+    void setCacheControl(const char *value);
+    void setLastModified(const char *value);
+};
+
+}
+}
+
+#endif