AU: Proxy Resolver classes

proxy_resolver.h

+// Copyright (c) 2010 The Chromium OS 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 CHROMEOS_PLATFORM_UPDATE_ENGINE_PROXY_RESOLVER_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_PROXY_RESOLVER_H__
+
+#include <base/logging.h>
+
+#include <string>
+#include <vector>
+
+namespace chromeos_update_engine {
+
+extern const char kNoProxy[];
+
+class ProxyResolver {
+ public:
+  ProxyResolver() {}
+  virtual ~ProxyResolver() {}
+
+  // Stores a list of proxies for a given |url| in |out_proxy|.
+  // Returns true on success. The resultant proxy will be in one of the
+  // following forms:
+  // http://<host>[:<port>] - HTTP proxy
+  // socks{4,5}://<host>[:<port>] - SOCKS4/5 proxy
+  // kNoProxy - no proxy
+  virtual bool GetProxiesForUrl(const std::string& url,
+                                std::vector<std::string>* out_proxies) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ProxyResolver);
+};
+
+// Always says to not use a proxy
+class DirectProxyResolver : public ProxyResolver {
+ public:
+  virtual bool GetProxiesForUrl(const std::string& url,
+                                std::vector<std::string>* out_proxies);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DirectProxyResolver);
+};
+
+}  // namespace chromeos_update_engine
+
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_PROXY_RESOLVER_H__