* Fleshed out AppCacheHost class a fair amount, in particular the cache selection algorithm.

* Added some AppCacheHost unit tests.

* Introduced AppCacheRequestHandler class, which replaces the clunkyApp
CacheInterceptor::ExtraInfo struct. This impl is entirely skeletal
stubs for now.

TEST=appcache_unittest.cc, but really needs more
BUG=none
Review URL: http://codereview.chromium.org/192043

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@26275 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 53 insertions, 0 deletions

diff --git a/webkit/appcache/appcache_request_handler.h b/webkit/appcache/appcache_request_handler.h
new file mode 100644
index 0000000..78fe9c3
--- /dev/null
+++ b/webkit/appcache/appcache_request_handler.h
@@ -0,0 +1,53 @@
+// 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.
+
+#ifndef WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
+#define WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
+
+#include "net/url_request/url_request.h"
+#include "webkit/appcache/appcache_host.h"
+
+class URLRequest;
+class URLRequestJob;
+
+namespace appcache {
+
+// An instance is created for each URLRequest. The instance survives all
+// http transactions involved in the processing of its URLRequest, and is
+// given the opportunity to hijack the request along the way. Callers
+// should use AppCacheHost::CreateRequestHandler to manufacture instances
+// that can retrieve resources for a particular host.
+class AppCacheRequestHandler : public URLRequest::UserData {
+ public:
+  // Should be called on each request intercept opportunity.
+  URLRequestJob* MaybeLoadResource(URLRequest* request);
+  URLRequestJob* MaybeLoadFallbackForRedirect(URLRequest* request,
+                                              const GURL& location);
+  URLRequestJob* MaybeLoadFallbackForResponse(URLRequest* request);
+
+  void GetExtraResponseInfo(int64* cache_id, GURL* manifest_url);
+
+ private:
+  friend class AppCacheHost;
+
+  // Ctor for main resource loads.
+  explicit AppCacheRequestHandler(AppCacheHost* host);
+
+  // Ctor for subresource loads when the cache is loaded.
+  explicit AppCacheRequestHandler(AppCache* cache);
+
+  // Main vs subresource loads are very different.
+  // TODO(michaeln): maybe have two derived classes?
+  bool is_main_request_;
+  int64 cache_id_;
+  scoped_refptr<AppCache> cache_;
+  base::WeakPtr<AppCacheHost> host_;
+  scoped_refptr<URLRequestJob> job_;
+  AppCacheService* service_;
+};
+
+}  // namespace appcache
+
+#endif  // WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
+