1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef COMPONENTS_COPRESENCE_RPC_HTTP_POST_H_
6#define COMPONENTS_COPRESENCE_RPC_HTTP_POST_H_
7
8#include <string>
9
10#include "base/callback.h"
11#include "base/macros.h"
12#include "base/memory/scoped_ptr.h"
13#include "net/url_request/url_fetcher_delegate.h"
14
15namespace google {
16namespace protobuf {
17class MessageLite;
18}
19}
20
21namespace net {
22class URLRequestContextGetter;
23}
24
25namespace copresence {
26
27// This class handles all Apiary calls to the Copresence server.
28// It configures the HTTP request appropriately and reports any errors.
29// If deleted, the HTTP request is cancelled.
30//
31// TODO(ckehoe): Add retry logic.
32class HttpPost : public net::URLFetcherDelegate {
33 public:
34  // Callback to receive the HTTP status code and body of the response
35  // (if any). A pointer to this HttpPost object is also passed along.
36  typedef base::Callback<void(int, const std::string&)>
37      ResponseCallback;
38
39  // Create a request to the Copresence server.
40  // |url_context_getter| is owned by the caller,
41  // and the context it provides must be available until the request completes.
42  HttpPost(net::URLRequestContextGetter* url_context_getter,
43           const std::string& server_host,
44           const std::string& rpc_name,
45           const std::string& tracing_token,
46           std::string api_key,  // If blank, we overwrite with a default.
47           const google::protobuf::MessageLite& request_proto);
48
49  // HTTP requests are cancelled on delete.
50  virtual ~HttpPost();
51
52  // Send an HttpPost request.
53  void Start(const ResponseCallback& response_callback);
54
55 private:
56  static const int kUrlFetcherId = 1;
57  static const char kApiKeyField[];
58  static const char kTracingField[];
59
60  friend class HttpPostTest;
61
62  // Overridden from net::URLFetcherDelegate.
63  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
64
65  ResponseCallback response_callback_;
66
67  scoped_ptr<net::URLFetcher> url_fetcher_;
68
69  DISALLOW_COPY_AND_ASSIGN(HttpPost);
70};
71
72}  // namespace copresence
73
74#endif  // COMPONENTS_COPRESENCE_RPC_HTTP_POST_H_
75