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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
// Copyright 2015 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.
#include "net/proxy/proxy_resolver_mojo.h"
#include "base/bind.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "mojo/common/common_type_converters.h"
#include "mojo/common/url_type_converters.h"
#include "net/base/net_errors.h"
#include "net/dns/mojo_host_resolver_impl.h"
#include "net/proxy/mojo_proxy_resolver_factory.h"
#include "net/proxy/mojo_proxy_type_converters.h"
#include "net/proxy/proxy_info.h"
#include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
#include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h"
namespace net {
class ProxyResolverMojo::Job : public interfaces::ProxyResolverRequestClient,
public mojo::ErrorHandler {
public:
Job(ProxyResolverMojo* resolver,
const GURL& url,
ProxyInfo* results,
const CompletionCallback& callback);
~Job() override;
// Cancels the job and prevents the callback from being run.
void Cancel();
// Returns the LoadState of this job.
LoadState load_state() { return load_state_; }
private:
// Overridden from mojo::ErrorHandler:
void OnConnectionError() override;
// Overridden from interfaces::ProxyResolverRequestClient:
void ReportResult(
int32_t error,
mojo::Array<interfaces::ProxyServerPtr> proxy_servers) override;
void LoadStateChanged(int32_t load_state) override;
ProxyResolverMojo* resolver_;
const GURL url_;
ProxyInfo* results_;
CompletionCallback callback_;
LoadState load_state_ = LOAD_STATE_RESOLVING_PROXY_FOR_URL;
base::ThreadChecker thread_checker_;
mojo::Binding<interfaces::ProxyResolverRequestClient> binding_;
};
ProxyResolverMojo::Job::Job(ProxyResolverMojo* resolver,
const GURL& url,
ProxyInfo* results,
const CompletionCallback& callback)
: resolver_(resolver),
url_(url),
results_(results),
callback_(callback),
binding_(this) {
binding_.set_error_handler(this);
interfaces::ProxyResolverRequestClientPtr client_ptr;
binding_.Bind(mojo::GetProxy(&client_ptr));
resolver_->mojo_proxy_resolver_ptr_->GetProxyForUrl(mojo::String::From(url_),
client_ptr.Pass());
}
ProxyResolverMojo::Job::~Job() {
DCHECK(thread_checker_.CalledOnValidThread());
if (!callback_.is_null())
callback_.Run(ERR_PAC_SCRIPT_TERMINATED);
}
void ProxyResolverMojo::Job::Cancel() {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!callback_.is_null());
callback_.Reset();
}
void ProxyResolverMojo::Job::OnConnectionError() {
DCHECK(thread_checker_.CalledOnValidThread());
DVLOG(1) << "ProxyResolverMojo::Job::OnConnectionError";
resolver_->RemoveJob(this);
}
void ProxyResolverMojo::Job::ReportResult(
int32_t error,
mojo::Array<interfaces::ProxyServerPtr> proxy_servers) {
DCHECK(thread_checker_.CalledOnValidThread());
DVLOG(1) << "ProxyResolverMojo::Job::ReportResult: " << error;
if (error == OK) {
*results_ = proxy_servers.To<ProxyInfo>();
DVLOG(1) << "Servers: " << results_->ToPacString();
}
CompletionCallback callback = callback_;
callback_.Reset();
resolver_->RemoveJob(this);
callback.Run(error);
}
void ProxyResolverMojo::Job::LoadStateChanged(int32_t load_state) {
load_state_ = static_cast<LoadState>(load_state);
}
ProxyResolverMojo::ProxyResolverMojo(
MojoProxyResolverFactory* mojo_proxy_resolver_factory,
HostResolver* host_resolver)
: ProxyResolver(true /* |expects_pac_bytes| */),
mojo_proxy_resolver_factory_(mojo_proxy_resolver_factory),
host_resolver_(host_resolver) {
}
ProxyResolverMojo::~ProxyResolverMojo() {
DCHECK(thread_checker_.CalledOnValidThread());
// All pending requests should have been cancelled.
DCHECK(pending_jobs_.empty());
DCHECK(set_pac_script_callback_.IsCancelled());
}
void ProxyResolverMojo::CancelSetPacScript() {
DCHECK(thread_checker_.CalledOnValidThread());
set_pac_script_callback_.Cancel();
}
int ProxyResolverMojo::SetPacScript(
const scoped_refptr<ProxyResolverScriptData>& pac_script,
const CompletionCallback& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(set_pac_script_callback_.IsCancelled());
DCHECK(!callback.is_null());
if (pac_script->type() != ProxyResolverScriptData::TYPE_SCRIPT_CONTENTS ||
pac_script->utf16().empty()) {
return ERR_PAC_SCRIPT_FAILED;
}
DVLOG(1) << "ProxyResolverMojo::SetPacScript: " << pac_script->utf16();
set_pac_script_callback_.Reset(
base::Bind(&ProxyResolverMojo::OnSetPacScriptDone, base::Unretained(this),
pac_script, callback));
if (!mojo_proxy_resolver_ptr_)
SetUpServices();
mojo_proxy_resolver_ptr_->SetPacScript(
mojo::String::From(pac_script->utf16()),
set_pac_script_callback_.callback());
return ERR_IO_PENDING;
}
void ProxyResolverMojo::OnSetPacScriptDone(
const scoped_refptr<ProxyResolverScriptData>& pac_script,
const CompletionCallback& callback,
int32_t result) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!set_pac_script_callback_.IsCancelled());
DVLOG(1) << "ProxyResolverMojo::OnSetPacScriptDone: " << result;
// |callback| is owned by |set_pac_script_callback_|, so make a copy before
// cancelling.
auto callback_copy = callback;
set_pac_script_callback_.Cancel();
callback_copy.Run(result);
}
void ProxyResolverMojo::SetUpServices() {
DCHECK(thread_checker_.CalledOnValidThread());
// A Mojo service implementation must outlive its binding.
mojo_host_resolver_binding_.reset();
interfaces::HostResolverPtr mojo_host_resolver_ptr;
mojo_host_resolver_.reset(new MojoHostResolverImpl(host_resolver_));
mojo_host_resolver_binding_.reset(new mojo::Binding<interfaces::HostResolver>(
mojo_host_resolver_.get(), mojo::GetProxy(&mojo_host_resolver_ptr)));
mojo_proxy_resolver_ptr_.reset();
mojo_proxy_resolver_factory_->Create(
mojo::GetProxy(&mojo_proxy_resolver_ptr_), mojo_host_resolver_ptr.Pass());
mojo_proxy_resolver_ptr_.set_error_handler(this);
}
void ProxyResolverMojo::OnConnectionError() {
DCHECK(thread_checker_.CalledOnValidThread());
DVLOG(1) << "ProxyResolverMojo::OnConnectionError";
// Disconnect from the Mojo proxy resolver service. An attempt to reconnect
// will happen on the next |SetPacScript()| request.
mojo_proxy_resolver_ptr_.reset();
// This callback may call |SetPacScript()| and re-create the connection. So
// disconnect from the Mojo service (above) before aborting the pending
// request.
if (!set_pac_script_callback_.IsCancelled())
set_pac_script_callback_.callback().Run(ERR_PAC_SCRIPT_TERMINATED);
}
void ProxyResolverMojo::RemoveJob(Job* job) {
DCHECK(thread_checker_.CalledOnValidThread());
size_t num_erased = pending_jobs_.erase(job);
DCHECK(num_erased);
delete job;
}
int ProxyResolverMojo::GetProxyForURL(const GURL& url,
ProxyInfo* results,
const CompletionCallback& callback,
RequestHandle* request,
const BoundNetLog& net_log) {
DCHECK(thread_checker_.CalledOnValidThread());
// If the Mojo service is not connected, fail. The Mojo service is connected
// when the script is set, which must be done after construction and after a
// previous request returns ERR_PAC_SCRIPT_TERMINATED due to the Mojo proxy
// resolver process crashing.
if (!mojo_proxy_resolver_ptr_) {
DVLOG(1) << "ProxyResolverMojo::GetProxyForURL: Mojo not connected";
return ERR_PAC_SCRIPT_TERMINATED;
}
Job* job = new Job(this, url, results, callback);
bool inserted = pending_jobs_.insert(job).second;
DCHECK(inserted);
*request = job;
return ERR_IO_PENDING;
}
void ProxyResolverMojo::CancelRequest(RequestHandle request) {
DCHECK(thread_checker_.CalledOnValidThread());
Job* job = static_cast<Job*>(request);
DCHECK(job);
job->Cancel();
RemoveJob(job);
}
LoadState ProxyResolverMojo::GetLoadState(RequestHandle request) const {
Job* job = static_cast<Job*>(request);
CHECK_EQ(1u, pending_jobs_.count(job));
return job->load_state();
}
} // namespace net
|
