Added alternative configuration for the data reduction proxy

components/data_reduction_proxy/browser/data_reduction_proxy_params.h

+// Copyright 2014 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 COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_PARAMS_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_PARAMS_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "url/gurl.h"
+
+namespace data_reduction_proxy {
+
+// Provides initialization parameters. Proxy origins, the probe url, and the
+// authentication key are taken from flags if available and from preprocessor
+// constants otherwise. Only the key may be changed after construction.
+class DataReductionProxyParams {
+ public:
+  typedef std::vector<GURL> DataReductionProxyList;
+
+  // Returns true if this client is part of the data reduction proxy field
+  // trial.
+  static bool IsIncludedInFieldTrial();
+
+  // Returns true if this client is part of field trial to use an alternative
+  // configuration for the data reduction proxy.
+  static bool IsIncludedInAlternativeFieldTrial();
+
+  // Returns true if this client is part of the field trial that should display
+  // a promotion for the data reduction proxy.
+  static bool IsIncludedInPromoFieldTrial();
+
+  // Returns true if this client is part of a field trial that uses preconnect
+  // hinting.
+  static bool IsIncludedInPreconnectHintingFieldTrial();
+
+  // Returns true if the authentication key was set on the command line.
+  static bool IsKeySetOnCommandLine();
+
+  // Constructs configuration parameters. If |allowed|, then the standard
+  // data reduction proxy configuration is allowed to be used. If
+  // |fallback_allowed| a fallback proxy can be used if the primary proxy is
+  // bypassed or disabled. If |fallback_allowed| then an alternative proxy
+  // configuration is allowed to be used. This alternative configuration would
+  // replace the primary and fallback proxy configurations if enabled. Finally
+  // if |promo_allowed|, the client may show a promotion for the data
+  // reduction proxy.
+  //
+  // A standard configuration has a primary proxy, and a fallback proxy for
+  // http traffic. The alternative configuration has a different primary and
+  // fallback proxy for http traffic, and an SSL proxy.
+  DataReductionProxyParams(bool allowed,
+                           bool fallback_allowed,
+                           bool alt_allowed,
+                           bool promo_allowed);
+
+  virtual ~DataReductionProxyParams();
+
+  // Returns the data reduction proxy primary origin.
+  const GURL& origin() const {
+    return origin_;
+  }
+
+  // Returns the data reduction proxy fallback origin.
+  const GURL& fallback_origin() const {
+    return fallback_origin_;
+  }
+
+  // Returns the data reduction proxy ssl origin that is used with the
+  // alternative proxy configuration.
+  const GURL& ssl_origin() const {
+    return ssl_origin_;
+  }
+
+  // Returns the alternative data reduction proxy primary origin.
+  const GURL& alt_origin() const {
+    return alt_origin_;
+  }
+
+  // Returns the alternative data reduction proxy fallback origin.
+  const GURL& alt_fallback_origin() const {
+    return alt_fallback_origin_;
+  }
+
+  // Returns the URL to probe to decide if the primary origin should be used.
+  const GURL& probe_url() const {
+    return probe_url_;
+  }
+
+  // Set the proxy authentication key.
+  void set_key(const std::string& key) {
+    key_ = key;
+  }
+
+  // Returns the proxy authentication key.
+  const std::string& key() const {
+    return key_;
+  }
+
+  // Returns true if the data reduction proxy configuration may be used.
+  bool allowed() const {
+    return allowed_;
+  }
+
+  // Returns true if the fallback proxy may be used.
+  bool fallback_allowed() const {
+    return fallback_allowed_;
+  }
+
+  // Returns true if the alternative data reduction proxy configuration may be
+  // used.
+  bool alternative_allowed() const {
+    return alt_allowed_;
+  }
+
+  // Returns true if the data reduction proxy promo may be shown.
+  // This is idependent of whether the data reduction proxy is allowed.
+  // TODO(bengr): maybe tie to whether proxy is allowed.
+  bool promo_allowed() const {
+    return promo_allowed_;
+  }
+
+  // Given |allowed_|, |fallback_allowed_|, and |alt_allowed_|, returns the
+  // list of data reduction proxies that may be used.
+  DataReductionProxyList GetAllowedProxies() const;
+
+ protected:
+  // Test constructor that optionally won't call Init();
+  DataReductionProxyParams(bool allowed,
+                           bool fallback_allowed,
+                           bool alt_allowed,
+                           bool promo_allowed,
+                           bool should_call_init);
+
+  // Initialize the values of the proxies, probe URL, and key from command
+  // line flags and preprocessor constants, and check that there are
+  // corresponding definitions for the allowed configurations.
+  bool Init(bool allowed, bool fallback_allowed, bool alt_allowed);
+
+  // Initialize the values of the proxies, probe URL, and key from command
+  // line flags and preprocessor constants.
+  void InitWithoutChecks();
+
+  // Returns the corresponding string from preprocessor constants if defined,
+  // and an empty string otherwise.
+  virtual std::string GetDefaultKey() const;
+  virtual std::string GetDefaultDevOrigin() const;
+  virtual std::string GetDefaultOrigin() const;
+  virtual std::string GetDefaultFallbackOrigin() const;
+  virtual std::string GetDefaultSSLOrigin() const;
+  virtual std::string GetDefaultAltOrigin() const;
+  virtual std::string GetDefaultAltFallbackOrigin() const;
+  virtual std::string GetDefaultProbeURL() const;
+
+ private:
+  GURL origin_;
+  GURL fallback_origin_;
+  GURL ssl_origin_;
+  GURL alt_origin_;
+  GURL alt_fallback_origin_;
+  GURL probe_url_;
+
+  std::string key_;
+
+  bool allowed_;
+  const bool fallback_allowed_;
+  bool alt_allowed_;
+  const bool promo_allowed_;
+
+
+  DISALLOW_COPY_AND_ASSIGN(DataReductionProxyParams);
+};
+
+}  // namespace data_reduction_proxy
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_PARAMS_H_