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
|
// 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.
#include "chromeos/dbus/introspectable_client.h"
#include "base/bind.h"
#include "base/logging.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "third_party/libxml/chromium/libxml_utils.h"
namespace {
// D-Bus specification constants.
const char kIntrospectableInterface[] = "org.freedesktop.DBus.Introspectable";
const char kIntrospect[] = "Introspect";
// String constants used for parsing D-Bus Introspection XML data.
const char kInterfaceNode[] = "interface";
const char kInterfaceNameAttribute[] = "name";
} // namespace
namespace chromeos {
// The IntrospectableClient implementation used in production.
class IntrospectableClientImpl : public IntrospectableClient {
public:
IntrospectableClientImpl() : bus_(NULL), weak_ptr_factory_(this) {}
~IntrospectableClientImpl() override {}
// IntrospectableClient override.
void Introspect(const std::string& service_name,
const dbus::ObjectPath& object_path,
const IntrospectCallback& callback) override {
dbus::MethodCall method_call(kIntrospectableInterface, kIntrospect);
dbus::ObjectProxy* object_proxy = bus_->GetObjectProxy(service_name,
object_path);
object_proxy->CallMethod(
&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&IntrospectableClientImpl::OnIntrospect,
weak_ptr_factory_.GetWeakPtr(),
service_name, object_path, callback));
}
protected:
void Init(dbus::Bus* bus) override { bus_ = bus; }
private:
// Called by dbus:: when a response for Introspect() is recieved.
void OnIntrospect(const std::string& service_name,
const dbus::ObjectPath& object_path,
const IntrospectCallback& callback,
dbus::Response* response) {
// Parse response.
bool success = false;
std::string xml_data;
if (response != NULL) {
dbus::MessageReader reader(response);
if (!reader.PopString(&xml_data)) {
LOG(WARNING) << "Introspect response has incorrect paramters: "
<< response->ToString();
} else {
success = true;
}
}
// Notify client.
callback.Run(service_name, object_path, xml_data, success);
}
dbus::Bus* bus_;
// Weak pointer factory for generating 'this' pointers that might live longer
// than we do.
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<IntrospectableClientImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(IntrospectableClientImpl);
};
IntrospectableClient::IntrospectableClient() {
}
IntrospectableClient::~IntrospectableClient() {
}
// static
std::vector<std::string>
IntrospectableClient::GetInterfacesFromIntrospectResult(
const std::string& xml_data) {
std::vector<std::string> interfaces;
XmlReader reader;
if (!reader.Load(xml_data))
return interfaces;
do {
// Skip to the next open tag, exit when done.
while (!reader.SkipToElement()) {
if (!reader.Read()) {
return interfaces;
}
}
// Only look at interface nodes.
if (reader.NodeName() != kInterfaceNode)
continue;
// Skip if missing the interface name.
std::string interface_name;
if (!reader.NodeAttribute(kInterfaceNameAttribute, &interface_name))
continue;
interfaces.push_back(interface_name);
} while (reader.Read());
return interfaces;
}
// static
IntrospectableClient* IntrospectableClient::Create() {
return new IntrospectableClientImpl();
}
} // namespace chromeos
|
