Third Party Authentication for Android Part I - TokenFetcherProxy

remoting/client/jni/jni_token_fetcher.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 REMOTING_CLIENT_JNI_JNI_TOKEN_FETCHER_H_
+#define REMOTING_CLIENT_JNI_JNI_TOKEN_FETCHER_H_
+
+#include "base/callback.h"
+#include "base/memory/weak_ptr.h"
+#include "remoting/protocol/third_party_client_authenticator.h"
+
+namespace remoting {
+
+class ChromotingJniInstance;
+
+// JniTokenFetcher is used by the ThirdPartyClientAuthenticator to fetch the
+// access code and token from the android app via JNI.
+class JniTokenFetcher

[Sergey Ulanov, 2014/06/04 03:49:17]

This looks a lot like PepperTokenFetcher. I think we can avoid duplicating this
logic here. I think it should be possible to refactor it so that both
ChromotingInstance and CHromotingJniInstance can use the same class. E.g.
instead of passing jni_instance you can pass a callback for
jni_instance_->FetchThirdPartyToken() (created with weak pointer).

[kelvinp, 2014/06/04 21:13:53]

Done.

+    : public protocol::ThirdPartyClientAuthenticator::TokenFetcher {
+ public:
+  JniTokenFetcher(base::WeakPtr<ChromotingJniInstance> jni_instance,
+                  const std::string& host_public_key);
+  virtual ~JniTokenFetcher();
+
+  // protocol::TokenClientAuthenticator::TokenFetcher interface.
+  virtual void FetchThirdPartyToken(
+      const GURL& token_url,
+      const std::string& scope,
+      const TokenFetchedCallback& token_fetched_callback) OVERRIDE;
+
+  // Called by ChromotingJniInstance when the android app finishes fetching the
+  // token.
+  void OnTokenFetched(const std::string& token,
+                      const std::string& shared_secret);
+
+ private:
+  base::WeakPtr<ChromotingJniInstance> jni_instance_;
+  std::string client_id_;
+  TokenFetchedCallback token_fetched_callback_;
+  base::WeakPtrFactory<JniTokenFetcher> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(JniTokenFetcher);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_JNI_JNI_TOKEN_FETCHER_H_