Split SdchManager::Dictionary out into separate class/file.

net/base/sdch_dictionary.h

+// Copyright 2015 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 NET_BASE_SDCH_DICTIONARY_H_
+#define NET_BASE_SDCH_DICTIONARY_H_
+
+#include <set>
+#include <string>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "net/base/net_export.h"
+#include "net/base/sdch_problem_codes.h"
+#include "url/gurl.h"
+
+namespace base {
+class Clock;
+class Value;
+}
+
+namespace net {
+
+// Contains all information for an SDCH dictionary.  This class is intended
+// to be used with a RefCountedData<> wrappers.  These dictionaries
+// are vended by SdchManager; see sdch_manager.h for details.
+class NET_EXPORT_PRIVATE SdchDictionary {
+ public:
+  // Construct a vc-diff usable dictionary from the dictionary_text starting
+  // at the given offset. The supplied client_hash should be used to
+  // advertise the dictionary's availability relative to the suppplied URL.
+  SdchDictionary(const std::string& dictionary_text,
+                 size_t offset,
+                 const std::string& client_hash,
+                 const std::string& server_hash,
+                 const GURL& url,
+                 const std::string& domain,
+                 const std::string& path,
+                 const base::Time& expiration,
+                 const std::set<int>& ports);
+
+  ~SdchDictionary();
+
+  // Sdch filters can get our text to use in decoding compressed data.
+  const std::string& text() const { return text_; }
+
+  const GURL& url() const { return url_; }
+  const std::string& client_hash() const { return client_hash_; }
+  const std::string& server_hash() const { return server_hash_; }
+  const std::string& domain() const { return domain_; }
+  const std::string& path() const { return path_; }
+  const base::Time& expiration() const { return expiration_; }
+  const std::set<int>& ports() const { return ports_; }
+
+  // Security methods to check if we can establish a new dictionary with the
+  // given data, that arrived in response to get of dictionary_url.
+  static SdchProblemCode CanSet(const std::string& domain,
+                                const std::string& path,
+                                const std::set<int>& ports,
+                                const GURL& dictionary_url);
+
+  // Security method to check if we can use a dictionary to decompress a
+  // target that arrived with a reference to this dictionary.
+  SdchProblemCode CanUse(const GURL& referring_url) const;
+
+  // Compare paths to see if they "match" for dictionary use.
+  static bool PathMatch(const std::string& path,
+                        const std::string& restriction);
+
+  // Is this dictionary expired?
+  bool Expired() const;
+
+  void SetClockForTesting(scoped_ptr<base::Clock> clock);
+
+ private:
+  friend class base::RefCountedData<SdchDictionary>;
+
+  // Private copy-constructor to support RefCountedData<>, which requires
+  // that an object stored in it be either DefaultConstructible or
+  // CopyConstructible
+  SdchDictionary(const SdchDictionary& rhs);
+
+  // The actual text of the dictionary.
+  std::string text_;
+
+  // Part of the hash of text_ that the client uses to advertise the fact that
+  // it has a specific dictionary pre-cached.
+  std::string client_hash_;
+
+  // Part of the hash of text_ that the server uses to identify the
+  // dictionary it wants used for decoding.
+  std::string server_hash_;
+
+  // The GURL that arrived with the text_ in a URL request to specify where
+  // this dictionary may be used.
+  const GURL url_;
+
+  // Metadate "headers" in before dictionary text contained the following:
+  // Each dictionary payload consists of several headers, followed by the text
+  // of the dictionary. The following are the known headers.
+  const std::string domain_;
+  const std::string path_;
+  const base::Time expiration_;  // Implied by max-age.
+  const std::set<int> ports_;
+
+  scoped_ptr<base::Clock> clock_;
+
+  void operator=(const SdchDictionary&) = delete;
+};
+
+}  // namespace net
+
+#endif  // NET_BASE_SDCH_DICTIONARY_H_