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// Copyright 2016 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 BLIMP_CLIENT_SESSION_ASSIGNMENT_SOURCE_H_
#define BLIMP_CLIENT_SESSION_ASSIGNMENT_SOURCE_H_
#include <string>
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "blimp/client/blimp_client_export.h"
#include "net/base/ip_endpoint.h"
#include "net/url_request/url_fetcher_delegate.h"
namespace base {
class FilePath;
class SingleThreadTaskRunner;
class Value;
}
namespace net {
class URLFetcher;
class URLRequestContextGetter;
class X509Certificate;
}
namespace blimp {
namespace client {
// TODO(kmarshall): Take values from configuration data.
const char kDummyClientToken[] = "MyVoiceIsMyPassport";
// Potential assigner URLs.
const char kDefaultAssignerURL[] =
"https://blimp-pa.googleapis.com/v1/assignment";
// An Assignment contains the configuration data needed for a client
// to connect to the engine.
struct BLIMP_CLIENT_EXPORT Assignment {
enum TransportProtocol {
UNKNOWN = 0,
SSL = 1,
TCP = 2,
};
Assignment();
Assignment(const Assignment& other);
~Assignment();
// Returns true if the net::IPEndPoint has an unspecified IP, port, or
// transport protocol.
bool IsValid() const;
// Specifies the transport to use to connect to the engine.
TransportProtocol transport_protocol;
// Specifies the IP address and port on which to reach the engine.
net::IPEndPoint engine_endpoint;
// Used to authenticate to the specified engine.
std::string client_token;
// Specifies the X.509 certificate that the engine must report.
scoped_refptr<net::X509Certificate> cert;
};
// AssignmentSource provides functionality to find out how a client should
// connect to an engine.
class BLIMP_CLIENT_EXPORT AssignmentSource : public net::URLFetcherDelegate {
public:
// A Java counterpart will be generated for this enum.
// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.blimp.assignment
enum Result {
RESULT_UNKNOWN = 0,
RESULT_OK = 1,
RESULT_BAD_REQUEST = 2,
RESULT_BAD_RESPONSE = 3,
RESULT_INVALID_PROTOCOL_VERSION = 4,
RESULT_EXPIRED_ACCESS_TOKEN = 5,
RESULT_USER_INVALID = 6,
RESULT_OUT_OF_VMS = 7,
RESULT_SERVER_ERROR = 8,
RESULT_SERVER_INTERRUPTED = 9,
RESULT_NETWORK_FAILURE = 10,
RESULT_INVALID_CERT = 11,
};
typedef base::Callback<void(AssignmentSource::Result, const Assignment&)>
AssignmentCallback;
// |network_task_runner|: The task runner to use for querying the Assigner API
// over the network.
// |file_task_runner|: The task runner to use for reading cert files from disk
// (specified on the command line.)
AssignmentSource(
const scoped_refptr<base::SingleThreadTaskRunner>& network_task_runner,
const scoped_refptr<base::SingleThreadTaskRunner>& file_task_runner);
~AssignmentSource() override;
// Retrieves a valid assignment for the client and posts the result to the
// given callback. |client_auth_token| is the OAuth2 access token to send to
// the assigner when requesting an assignment. If this is called before a
// previous call has completed, the old callback will be called with
// RESULT_SERVER_INTERRUPTED and no Assignment.
void GetAssignment(const std::string& client_auth_token,
const AssignmentCallback& callback);
private:
void OnGetAssignmentFromCommandLineDone(const std::string& client_auth_token,
Assignment parsed_assignment);
void QueryAssigner(const std::string& client_auth_token);
void ParseAssignerResponse();
void OnJsonParsed(scoped_ptr<base::Value> json);
void OnJsonParseError(const std::string& error);
// net::URLFetcherDelegate implementation:
void OnURLFetchComplete(const net::URLFetcher* source) override;
// GetAssignment() callback, invoked after URLFetcher completion.
AssignmentCallback callback_;
scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
scoped_refptr<net::URLRequestContextGetter> url_request_context_;
scoped_ptr<net::URLFetcher> url_fetcher_;
base::WeakPtrFactory<AssignmentSource> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(AssignmentSource);
};
} // namespace client
} // namespace blimp
#endif // BLIMP_CLIENT_SESSION_ASSIGNMENT_SOURCE_H_
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