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Side by Side Diff: components/autofill/browser/autofill_download.h

Issue 17392006: In components/autofill, move browser/ to core/browser/ (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Rebase to fix conflicts Created 7 years, 6 months ago
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1 // Copyright (c) 2012 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_AUTOFILL_BROWSER_AUTOFILL_DOWNLOAD_H_
6 #define COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_DOWNLOAD_H_
7
8 #include <stddef.h>
9 #include <list>
10 #include <map>
11 #include <string>
12 #include <utility>
13 #include <vector>
14
15 #include "base/compiler_specific.h"
16 #include "base/gtest_prod_util.h"
17 #include "base/time.h"
18 #include "components/autofill/browser/autofill_type.h"
19 #include "net/url_request/url_fetcher_delegate.h"
20
21 namespace content {
22 class BrowserContext;
23 } // namespace content
24
25 namespace net {
26 class URLFetcher;
27 } // namespace net
28
29 namespace autofill {
30
31 class AutofillMetrics;
32 class FormStructure;
33
34 // Handles getting and updating Autofill heuristics.
35 class AutofillDownloadManager : public net::URLFetcherDelegate {
36 public:
37 enum AutofillRequestType {
38 REQUEST_QUERY,
39 REQUEST_UPLOAD,
40 };
41
42 // An interface used to notify clients of AutofillDownloadManager.
43 class Observer {
44 public:
45 // Called when field type predictions are successfully received from the
46 // server. |response_xml| contains the server response.
47 virtual void OnLoadedServerPredictions(const std::string& response_xml) = 0;
48
49 // These notifications are used to help with testing.
50 // Called when heuristic either successfully considered for upload and
51 // not send or uploaded.
52 virtual void OnUploadedPossibleFieldTypes() {}
53 // Called when there was an error during the request.
54 // |form_signature| - the signature of the requesting form.
55 // |request_type| - type of request that failed.
56 // |http_error| - HTTP error code.
57 virtual void OnServerRequestError(const std::string& form_signature,
58 AutofillRequestType request_type,
59 int http_error) {}
60
61 protected:
62 virtual ~Observer() {}
63 };
64
65 // |observer| - observer to notify on successful completion or error.
66 AutofillDownloadManager(content::BrowserContext* context,
67 Observer* observer);
68 virtual ~AutofillDownloadManager();
69
70 // Starts a query request to Autofill servers. The observer is called with the
71 // list of the fields of all requested forms.
72 // |forms| - array of forms aggregated in this request.
73 bool StartQueryRequest(const std::vector<FormStructure*>& forms,
74 const AutofillMetrics& metric_logger);
75
76 // Starts an upload request for the given |form|, unless throttled by the
77 // server. The probability of the request going over the wire is
78 // GetPositiveUploadRate() if |form_was_autofilled| is true, or
79 // GetNegativeUploadRate() otherwise. The observer will be called even if
80 // there was no actual trip over the wire.
81 // |available_field_types| should contain the types for which we have data
82 // stored on the local client.
83 bool StartUploadRequest(const FormStructure& form,
84 bool form_was_autofilled,
85 const FieldTypeSet& available_field_types);
86
87 private:
88 friend class AutofillDownloadTest;
89 FRIEND_TEST_ALL_PREFIXES(AutofillDownloadTest, QueryAndUploadTest);
90
91 static std::string AutofillRequestTypeToString(const AutofillRequestType);
92
93 struct FormRequestData;
94 typedef std::list<std::pair<std::string, std::string> > QueryRequestCache;
95
96 // Initiates request to Autofill servers to download/upload heuristics.
97 // |form_xml| - form structure XML to upload/download.
98 // |request_data| - form signature hash(es) and indicator if it was a query.
99 // |request_data.query| - if true the data is queried and observer notified
100 // with new data, if available. If false heuristic data is uploaded to our
101 // servers.
102 bool StartRequest(const std::string& form_xml,
103 const FormRequestData& request_data);
104
105 // Each request is page visited. We store last |max_form_cache_size|
106 // request, to avoid going over the wire. Set to 16 in constructor. Warning:
107 // the search is linear (newest first), so do not make the constant very big.
108 void set_max_form_cache_size(size_t max_form_cache_size) {
109 max_form_cache_size_ = max_form_cache_size;
110 }
111
112 // Caches query request. |forms_in_query| is a vector of form signatures in
113 // the query. |query_data| is the successful data returned over the wire.
114 void CacheQueryRequest(const std::vector<std::string>& forms_in_query,
115 const std::string& query_data);
116 // Returns true if query is in the cache, while filling |query_data|, false
117 // otherwise. |forms_in_query| is a vector of form signatures in the query.
118 bool CheckCacheForQueryRequest(const std::vector<std::string>& forms_in_query,
119 std::string* query_data) const;
120 // Concatenates |forms_in_query| into one signature.
121 std::string GetCombinedSignature(
122 const std::vector<std::string>& forms_in_query) const;
123
124 // net::URLFetcherDelegate implementation:
125 virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
126
127 // Probability of the form upload. Between 0 (no upload) and 1 (upload all).
128 // GetPositiveUploadRate() is for matched forms,
129 // GetNegativeUploadRate() for non-matched.
130 double GetPositiveUploadRate() const;
131 double GetNegativeUploadRate() const;
132 void SetPositiveUploadRate(double rate);
133 void SetNegativeUploadRate(double rate);
134
135 // The pointer value is const, so this can only be set in the
136 // constructor. Must not be null.
137 content::BrowserContext* const browser_context_; // WEAK
138
139 // The observer to notify when server predictions are successfully received.
140 // The pointer value is const, so this can only be set in the constructor.
141 // Must not be null.
142 AutofillDownloadManager::Observer* const observer_; // WEAK
143
144 // For each requested form for both query and upload we create a separate
145 // request and save its info. As url fetcher is identified by its address
146 // we use a map between fetchers and info.
147 std::map<net::URLFetcher*, FormRequestData> url_fetchers_;
148
149 // Cached QUERY requests.
150 QueryRequestCache cached_forms_;
151 size_t max_form_cache_size_;
152
153 // Time when next query/upload requests are allowed. If 50x HTTP received,
154 // exponential back off is initiated, so this times will be in the future
155 // for awhile.
156 base::Time next_query_request_;
157 base::Time next_upload_request_;
158
159 // |positive_upload_rate_| is for matched forms,
160 // |negative_upload_rate_| for non matched.
161 double positive_upload_rate_;
162 double negative_upload_rate_;
163
164 // Needed for unit-test.
165 int fetcher_id_for_unittest_;
166 };
167
168 } // namespace autofill
169
170 #endif // COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_DOWNLOAD_H_
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