blob: f8eb6fd99493b021ad560b597d2ea28af8182814 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
// Copyright 2017 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_DOODLE_DOODLE_FETCHER_IMPL_H_
#define COMPONENTS_DOODLE_DOODLE_FETCHER_IMPL_H_
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "components/doodle/doodle_fetcher.h"
#include "components/doodle/doodle_types.h"
#include "net/url_request/url_fetcher_delegate.h"
#include "net/url_request/url_request_context_getter.h"
#include "url/gurl.h"
class GoogleURLTracker;
namespace base {
class DictionaryValue;
class TimeDelta;
class Value;
}
namespace doodle {
// This class provides information about any recent doodle.
// It works asynchronously and calls a callback when finished fetching the
// information from the remote enpoint.
class DoodleFetcherImpl : public DoodleFetcher, public net::URLFetcherDelegate {
public:
// Callback for JSON parsing to allow injecting platform-dependent code.
using ParseJSONCallback = base::Callback<void(
const std::string& unsafe_json,
const base::Callback<void(std::unique_ptr<base::Value> json)>& success,
const base::Callback<void(const std::string&)>& error)>;
DoodleFetcherImpl(
scoped_refptr<net::URLRequestContextGetter> download_context,
GoogleURLTracker* google_url_tracker,
const ParseJSONCallback& json_parsing_callback,
bool gray_background,
const base::Optional<std::string>& override_url);
~DoodleFetcherImpl() override;
// DoodleFetcher implementation.
void FetchDoodle(FinishedCallback callback) override;
bool IsFetchInProgress() const override;
private:
// net::URLFetcherDelegate implementation.
void OnURLFetchComplete(const net::URLFetcher* source) override;
// ParseJSONCallback Success callback
void OnJsonParsed(std::unique_ptr<base::Value> json);
// ParseJSONCallback Failure callback
void OnJsonParseFailed(const std::string& error_message);
base::Optional<DoodleConfig> ParseDoodleConfigAndTimeToLive(
const base::DictionaryValue& ddljson,
base::TimeDelta* time_to_live) const;
void RespondToAllCallbacks(DoodleState state,
base::TimeDelta time_to_live,
const base::Optional<DoodleConfig>& config);
GURL GetGoogleBaseUrl() const;
// Parameters set from constructor.
scoped_refptr<net::URLRequestContextGetter> const download_context_;
GoogleURLTracker* google_url_tracker_;
ParseJSONCallback json_parsing_callback_;
const bool gray_background_;
const base::Optional<std::string> override_url_;
std::vector<FinishedCallback> callbacks_;
std::unique_ptr<net::URLFetcher> fetcher_;
base::WeakPtrFactory<DoodleFetcherImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(DoodleFetcherImpl);
};
} // namespace doodle
#endif // COMPONENTS_DOODLE_DOODLE_FETCHER_IMPL_H_
|
