Source code

Revision control

Line Code
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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/* vim: set ts=2 sts=2 et sw=2: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIURI;
interface nsINetworkPredictorVerifier;

webidl Document;

typedef unsigned long PredictorPredictReason;
typedef unsigned long PredictorLearnReason;

[ref] native OriginAttributes(const mozilla::OriginAttributes);

/**
 * nsINetworkPredictor - learn about pages users visit, and allow us to take
 *                       predictive actions upon future visits.
 *                       NOTE: nsINetworkPredictor should only
 *                       be used on the main thread.
 */
[scriptable, uuid(acc88e7c-3f39-42c7-ac31-6377c2c3d73e)]
interface nsINetworkPredictor : nsISupports
{
  /**
   * Prediction reasons
   *
   * PREDICT_LINK - we are being asked to take predictive action because
   * the user is hovering over a link.
   *
   * PREDICT_LOAD - we are being asked to take predictive action because
   * the user has initiated a pageload.
   *
   * PREDICT_STARTUP - we are being asked to take predictive action
   * because the browser is starting up.
   */
  const PredictorPredictReason PREDICT_LINK = 0;
  const PredictorPredictReason PREDICT_LOAD = 1;
  const PredictorPredictReason PREDICT_STARTUP = 2;

  /**
   * Start taking predictive actions
   *
   * Calling this will cause the predictor to (possibly) start
   * taking actions such as DNS prefetch and/or TCP preconnect based on
   * (1) the host name that we are given, and (2) the reason we are being
   * asked to take actions.
   *
   * @param targetURI - The URI we are being asked to take actions based on.
   * @param sourceURI - The URI that is currently loaded. This is so we can
   *   avoid doing predictive actions for link hover on an HTTPS page (for
   *   example).
   * @param reason - The reason we are being asked to take actions. Can be
   *   any of the PREDICT_* values above.
   *   In the case of PREDICT_LINK, targetURI should be the URI of the link
   *   that is being hovered over, and sourceURI should be the URI of the page
   *   on which the link appears.
   *   In the case of PREDICT_LOAD, targetURI should be the URI of the page that
   *   is being loaded and sourceURI should be null.
   *   In the case of PREDICT_STARTUP, both targetURI and sourceURI should be
   *   null.
   * @param originAttributes - The originAttributes of the page load we are
   *   predicting about.
   * @param verifier - An nsINetworkPredictorVerifier used in testing to ensure
   *   we're predicting the way we expect to. Not necessary (or desired) for
   *   normal operation.
   */
  [implicit_jscontext]
  void predict(in nsIURI targetURI,
               in nsIURI sourceURI,
               in PredictorPredictReason reason,
               in jsval originAttributes,
               in nsINetworkPredictorVerifier verifier);

  [notxpcom]
  nsresult predictNative(in nsIURI targetURI,
                         in nsIURI sourceURI,
                         in PredictorPredictReason reason,
                         in OriginAttributes originAttributes,
                         in nsINetworkPredictorVerifier verifier);


  /*
   * Reasons we are learning something
   *
   * LEARN_LOAD_TOPLEVEL - we are learning about the toplevel resource of a
   *                       pageload (NOTE: this should ONLY be used by tests)
   *
   * LEARN_LOAD_SUBRESOURCE - we are learning a subresource from a pageload
   *
   * LEARN_LOAD_REDIRECT - we are learning about the re-direct of a URI
   *
   * LEARN_STARTUP - we are learning about a page loaded during startup
   */
  const PredictorLearnReason LEARN_LOAD_TOPLEVEL = 0;
  const PredictorLearnReason LEARN_LOAD_SUBRESOURCE = 1;
  const PredictorLearnReason LEARN_LOAD_REDIRECT = 2;
  const PredictorLearnReason LEARN_STARTUP = 3;

  /**
   * Add to our compendium of knowledge
   *
   * This adds to our prediction database to make things (hopefully)
   * smarter next time we predict something.
   *
   * @param targetURI - The URI that was loaded that we are keeping track of.
   * @param sourceURI - The URI that caused targetURI to be loaded (for page
   *   loads). This means the DOCUMENT URI.
   * @param reason - The reason we are learning this bit of knowledge.
   *   Reason can be any of the LEARN_* values.
   *   In the case of LEARN_LOAD_SUBRESOURCE, targetURI should be the URI of a
   *   subresource of a page, and sourceURI should be the top-level URI.
   *   In the case of LEARN_LOAD_REDIRECT, targetURI is the NEW URI of a
   *   top-level resource that was redirected to, and sourceURI is the
   *   ORIGINAL URI of said top-level resource.
   *   In the case of LEARN_STARTUP, targetURI should be the URI of a page
   *   that was loaded immediately after browser startup, and sourceURI should
   *   be null.
   * @param originAttributes - The originAttributes for the page load that we
   *   are learning about.
   */
  [implicit_jscontext]
  void learn(in nsIURI targetURI,
             in nsIURI sourceURI,
             in PredictorLearnReason reason,
             in jsval originAttributes);

  [notxpcom]
  nsresult learnNative(in nsIURI targetURI,
                       in nsIURI sourceURI,
                       in PredictorLearnReason reason,
                       in OriginAttributes originAttributes);

  /**
   * Clear out all our learned knowledge
   *
   * This removes everything from our database so that any predictions begun
   * after this completes will start from a blank slate.
   */
  void reset();
};

%{C++
// Wrapper functions to make use of the predictor easier and less invasive
class nsIChannel;

class nsILoadContext;
class nsILoadGroup;
class nsINetworkPredictorVerifier;

namespace mozilla {
namespace net {

nsresult PredictorPredict(nsIURI *targetURI,
                          nsIURI *sourceURI,
                          PredictorPredictReason reason,
                          const OriginAttributes& originAttributes,
                          nsINetworkPredictorVerifier *verifier);

nsresult PredictorLearn(nsIURI *targetURI,
                        nsIURI *sourceURI,
                        PredictorLearnReason reason,
                        const OriginAttributes& originAttributes);

nsresult PredictorLearn(nsIURI *targetURI,
                        nsIURI *sourceURI,
                        PredictorLearnReason reason,
                        nsILoadGroup *loadGroup);

nsresult PredictorLearn(nsIURI *targetURI,
                        nsIURI *sourceURI,
                        PredictorLearnReason reason,
                        dom::Document *document);

nsresult PredictorLearnRedirect(nsIURI *targetURI,
                                nsIChannel *channel,
                                const OriginAttributes& originAttributes);

} // mozilla::net
} // mozilla
%}