blob: 896c755f02768b775c58b3ba758dc1f098490735 (
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
|
// 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 COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_FETCHER_H_
#define COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_FETCHER_H_
#include <memory>
#include <vector>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string16.h"
#include "components/keyed_service/core/keyed_service.h"
class GURL;
class TemplateURL;
class TemplateURLService;
namespace net {
class URLFetcher;
class URLRequestContextGetter;
}
// TemplateURLFetcher is responsible for downloading OpenSearch description
// documents, creating a TemplateURL from the OSDD, and adding the TemplateURL
// to the TemplateURLService. Downloading is done in the background.
//
class TemplateURLFetcher : public KeyedService {
public:
typedef base::Callback<void(
net::URLFetcher* url_fetcher)> URLFetcherCustomizeCallback;
// Creates a TemplateURLFetcher.
TemplateURLFetcher(TemplateURLService* template_url_service,
net::URLRequestContextGetter* request_context);
~TemplateURLFetcher() override;
// If TemplateURLFetcher is not already downloading the OSDD for osdd_url,
// it is downloaded. If successful and the result can be parsed, a TemplateURL
// is added to the TemplateURLService.
//
// |keyword| must be non-empty. If there's already a non-replaceable
// TemplateURL in the model for |keyword|, or we're already downloading an
// OSDD for this keyword, no download is started.
//
// If |url_fetcher_customize_callback| is not null, it's run after a
// URLFetcher is created. This callback can be used to set additional
// parameters on the URLFetcher.
void ScheduleDownload(
const base::string16& keyword,
const GURL& osdd_url,
const GURL& favicon_url,
const URLFetcherCustomizeCallback& url_fetcher_customize_callback);
// The current number of outstanding requests.
int requests_count() const { return requests_.size(); }
protected:
// A RequestDelegate is created to download each OSDD. When done downloading
// RequestCompleted is invoked back on the TemplateURLFetcher.
class RequestDelegate;
// Invoked from the RequestDelegate when done downloading. Virtual for tests.
virtual void RequestCompleted(RequestDelegate* request);
private:
friend class RequestDelegate;
TemplateURLService* template_url_service_;
scoped_refptr<net::URLRequestContextGetter> request_context_;
// In progress requests.
std::vector<std::unique_ptr<RequestDelegate>> requests_;
DISALLOW_COPY_AND_ASSIGN(TemplateURLFetcher);
};
#endif // COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_FETCHER_H_
|
