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
|
// Copyright (c) 2012 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 CONTENT_BROWSER_LOADER_RESOURCE_LOADER_H_
#define CONTENT_BROWSER_LOADER_RESOURCE_LOADER_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "content/browser/loader/resource_handler.h"
#include "content/browser/ssl/ssl_client_auth_handler.h"
#include "content/browser/ssl/ssl_error_handler.h"
#include "content/common/content_export.h"
#include "content/public/browser/resource_controller.h"
#include "content/public/common/signed_certificate_timestamp_id_and_status.h"
#include "net/url_request/url_request.h"
namespace net {
class X509Certificate;
}
namespace content {
class CertStore;
class ResourceDispatcherHostLoginDelegate;
class ResourceLoaderDelegate;
class ResourceRequestInfoImpl;
// This class is responsible for driving the URLRequest (i.e., calling Start,
// Read, and servicing events). It has a ResourceHandler, which is typically a
// chain of ResourceHandlers, and is the ResourceController for its handler.
class CONTENT_EXPORT ResourceLoader : public net::URLRequest::Delegate,
public SSLErrorHandler::Delegate,
public SSLClientAuthHandler::Delegate,
public ResourceController {
public:
ResourceLoader(std::unique_ptr<net::URLRequest> request,
std::unique_ptr<ResourceHandler> handler,
CertStore* cert_store,
ResourceLoaderDelegate* delegate);
~ResourceLoader() override;
void StartRequest();
void CancelRequest(bool from_renderer);
bool is_transferring() const { return is_transferring_; }
void MarkAsTransferring(const scoped_refptr<ResourceResponse>& response);
void CompleteTransfer();
net::URLRequest* request() { return request_.get(); }
ResourceRequestInfoImpl* GetRequestInfo();
void ClearLoginDelegate();
// Returns a pointer to the ResourceResponse for a request that is
// being transferred to a new consumer. The response is valid between
// the time that the request is marked as transferring via
// MarkAsTransferring() and the time that the transfer is completed
// via CompleteTransfer().
ResourceResponse* transferring_response() {
return transferring_response_.get();
}
private:
// net::URLRequest::Delegate implementation:
void OnReceivedRedirect(net::URLRequest* request,
const net::RedirectInfo& redirect_info,
bool* defer) override;
void OnAuthRequired(net::URLRequest* request,
net::AuthChallengeInfo* info) override;
void OnCertificateRequested(net::URLRequest* request,
net::SSLCertRequestInfo* info) override;
void OnSSLCertificateError(net::URLRequest* request,
const net::SSLInfo& info,
bool fatal) override;
void OnBeforeNetworkStart(net::URLRequest* request, bool* defer) override;
void OnResponseStarted(net::URLRequest* request) override;
void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
// SSLErrorHandler::Delegate implementation:
void CancelSSLRequest(int error, const net::SSLInfo* ssl_info) override;
void ContinueSSLRequest() override;
// SSLClientAuthHandler::Delegate implementation.
void ContinueWithCertificate(net::X509Certificate* cert) override;
void CancelCertificateSelection() override;
// ResourceController implementation:
void Resume() override;
void Cancel() override;
void CancelAndIgnore() override;
void CancelWithError(int error_code) override;
void StartRequestInternal();
void CancelRequestInternal(int error, bool from_renderer);
// Stores the SignedCertificateTimestamps held in |sct_list| in the
// SignedCertificateTimestampStore singleton, associated with |process_id|.
// On return, |sct_ids| contains the assigned ID and verification status of
// each SignedCertificateTimestamp.
void StoreSignedCertificateTimestamps(
const net::SignedCertificateTimestampAndStatusList& sct_list,
int process_id,
SignedCertificateTimestampIDStatusList* sct_ids);
void CompleteResponseStarted();
void StartReading(bool is_continuation);
void ResumeReading();
void ReadMore(int* bytes_read);
// Passes a read result to the handler.
void CompleteRead(int bytes_read);
void ResponseCompleted();
void CallDidFinishLoading();
void RecordHistograms();
bool is_deferred() const { return deferred_stage_ != DEFERRED_NONE; }
// Used for categorizing loading of prefetches for reporting in histograms.
// NOTE: This enumeration is used in histograms, so please do not add entries
// in the middle.
enum PrefetchStatus {
STATUS_UNDEFINED,
STATUS_SUCCESS_FROM_CACHE,
STATUS_SUCCESS_FROM_NETWORK,
STATUS_CANCELED,
STATUS_MAX,
};
enum DeferredStage {
DEFERRED_NONE,
DEFERRED_START,
DEFERRED_NETWORK_START,
DEFERRED_REDIRECT,
DEFERRED_READ,
DEFERRED_RESPONSE_COMPLETE,
DEFERRED_FINISH
};
DeferredStage deferred_stage_;
std::unique_ptr<net::URLRequest> request_;
std::unique_ptr<ResourceHandler> handler_;
ResourceLoaderDelegate* delegate_;
scoped_refptr<ResourceDispatcherHostLoginDelegate> login_delegate_;
std::unique_ptr<SSLClientAuthHandler> ssl_client_auth_handler_;
base::TimeTicks read_deferral_start_time_;
// Indicates that we are in a state of being transferred to a new downstream
// consumer. We are waiting for a notification to complete the transfer, at
// which point we'll receive a new ResourceHandler.
bool is_transferring_;
// Holds the ResourceResponse for a request that is being transferred
// to a new consumer. This member is populated when the request is
// marked as transferring via MarkAsTransferring(), and it is cleared
// when the transfer is completed via CompleteTransfer().
scoped_refptr<ResourceResponse> transferring_response_;
// Instrumentation add to investigate http://crbug.com/503306.
// TODO(mmenke): Remove once bug is fixed.
int times_cancelled_before_request_start_;
bool started_request_;
int times_cancelled_after_request_start_;
// Allows tests to use a mock CertStore. The CertStore must outlive
// the ResourceLoader.
CertStore* cert_store_;
base::WeakPtrFactory<ResourceLoader> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ResourceLoader);
};
} // namespace content
#endif // CONTENT_BROWSER_LOADER_RESOURCE_LOADER_H_
|
