AppCacheHost cache selection algorithm

webkit/appcache/appcache_request_handler.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/appcache/appcache_request_handler.h"
+
+#include "net/url_request/url_request.h"
+#include "net/url_request/url_request_job.h"
+#include "webkit/appcache/appcache.h"
+
+namespace appcache {
+
+// AppCacheRequestHandler -----------------------------------------------------
+
+static bool IsHttpOrHttpsGetOrEquivalent(URLRequest* request) {
+  return false;  // TODO(michaeln): write me
+}
+
+AppCacheRequestHandler::AppCacheRequestHandler(AppCacheHost* host)
+    : is_main_request_(true), cache_id_(kNoCacheId),
+      host_(host->AsWeakPtr()), service_(host->service()) {
+}
+
+AppCacheRequestHandler::AppCacheRequestHandler(AppCache* cache)
+    : is_main_request_(false), cache_id_(kNoCacheId),
+      cache_(cache), service_(cache->service()) {
+}
+
+void AppCacheRequestHandler::GetExtraResponseInfo(
+    int64* cache_id, GURL* manifest_url) {
+  // TODO(michaeln): If this is a main request and it was retrieved from
+  // an appcache, ensure that appcache survives the frame navigation. The
+  // AppCacheHost should hold reference to that cache to prevent it from
+  // being dropped from the in-memory collection of AppCaches. When cache
+  // selection occurs, that extra reference should be dropped. Perhaps
+  // maybe: if (is_main) host->LoadCacheOfMainResource(cache_id);
+}
+
+URLRequestJob* AppCacheRequestHandler::MaybeLoadResource(URLRequest* request) {
+  if (!IsHttpOrHttpsGetOrEquivalent(request))
+    return NULL;
+  // TODO(michaeln): write me
+  return NULL;
+}
+
+URLRequestJob* AppCacheRequestHandler::MaybeLoadFallbackForRedirect(
+    URLRequest* request, const GURL& location) {
+  if (!IsHttpOrHttpsGetOrEquivalent(request))
+    return NULL;
+  // TODO(michaeln): write me
+  return NULL;
+}
+
+URLRequestJob* AppCacheRequestHandler::MaybeLoadFallbackForResponse(
+    URLRequest* request) {
+  if (!IsHttpOrHttpsGetOrEquivalent(request))
+    return NULL;
+  // TODO(michaeln): write me
+  return NULL;
+}
+
+}  // namespace appcache
+