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
|
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/winhttp/proxy_configuration.h"
#include "base/logging.h"
#include "base/memory/scoped_refptr.h"
#include "base/strings/sys_string_conversions.h"
#include "base/win/scoped_handle.h"
#include "base/win/windows_version.h"
#include "components/winhttp/net_util.h"
#include "components/winhttp/proxy_info.h"
#include "components/winhttp/scoped_winttp_proxy_info.h"
#include "url/gurl.h"
namespace winhttp {
ProxyConfiguration::ProxyConfiguration(const ProxyInfo& proxy_info)
: proxy_info_(proxy_info) {}
int ProxyConfiguration::access_type() const {
return DoGetAccessType();
}
int ProxyConfiguration::DoGetAccessType() const {
const bool is_using_named_proxy = !proxy_info_.auto_detect &&
proxy_info_.auto_config_url.empty() &&
!proxy_info_.proxy.empty();
return is_using_named_proxy ? WINHTTP_ACCESS_TYPE_NAMED_PROXY
: WINHTTP_ACCESS_TYPE_DEFAULT_PROXY;
}
absl::optional<ScopedWinHttpProxyInfo> ProxyConfiguration::GetProxyForUrl(
HINTERNET session_handle,
const GURL& url) const {
return DoGetProxyForUrl(session_handle, url);
}
absl::optional<ScopedWinHttpProxyInfo> ProxyConfiguration::DoGetProxyForUrl(
HINTERNET session_handle,
const GURL& url) const {
// Detect proxy settings using Web Proxy Auto Detection (WPAD).
WINHTTP_AUTOPROXY_OPTIONS auto_proxy_options = {0};
// Per MSDN, setting fAutoLogonIfChallenged to false first may work
// if Windows cached the proxy config.
auto_proxy_options.fAutoLogonIfChallenged = false;
bool try_auto_proxy = false;
if (proxy_info_.auto_detect) {
auto_proxy_options.dwFlags = WINHTTP_AUTOPROXY_AUTO_DETECT;
auto_proxy_options.dwAutoDetectFlags =
WINHTTP_AUTO_DETECT_TYPE_DHCP | WINHTTP_AUTO_DETECT_TYPE_DNS_A;
try_auto_proxy = true;
}
// PAC Url was specified, let system auto detect given the PAC url.
if (!proxy_info_.auto_config_url.empty()) {
auto_proxy_options.dwFlags |= WINHTTP_AUTOPROXY_CONFIG_URL;
auto_proxy_options.lpszAutoConfigUrl = proxy_info_.auto_config_url.c_str();
try_auto_proxy = true;
}
// Find the proxy server for the url.
ScopedWinHttpProxyInfo winhttp_proxy_info = {};
if (try_auto_proxy) {
const std::wstring url_str = base::SysUTF8ToWide(url.spec());
bool success = ::WinHttpGetProxyForUrl(session_handle, url_str.c_str(),
&auto_proxy_options,
winhttp_proxy_info.receive());
if (!success && ::GetLastError() == ERROR_WINHTTP_LOGIN_FAILURE) {
auto_proxy_options.fAutoLogonIfChallenged = true;
success = ::WinHttpGetProxyForUrl(session_handle, url_str.c_str(),
&auto_proxy_options,
winhttp_proxy_info.receive());
}
if (!success) {
PLOG(ERROR) << "Failed to get proxy for url";
return {};
}
} else {
winhttp_proxy_info.set_proxy(proxy_info_.proxy);
winhttp_proxy_info.set_proxy_bypass(proxy_info_.proxy_bypass);
}
if (!winhttp_proxy_info.IsValid())
return {};
return winhttp_proxy_info;
}
void SetProxyForRequest(
const HINTERNET request_handle,
const absl::optional<ScopedWinHttpProxyInfo>& winhttp_proxy_info) {
// Set the proxy option on the request handle.
if (winhttp_proxy_info.has_value() && winhttp_proxy_info.value().IsValid()) {
const ScopedWinHttpProxyInfo& proxy_info = winhttp_proxy_info.value();
VLOG(1) << "Setting proxy " << proxy_info.proxy();
auto hr = SetOption(request_handle, WINHTTP_OPTION_PROXY,
const_cast<WINHTTP_PROXY_INFO*>(proxy_info.get()));
if (FAILED(hr)) {
PLOG(ERROR) << "Failed to set WINHTTP_OPTION_PROXY: 0x" << std::hex << hr;
}
}
}
int AutoProxyConfiguration::DoGetAccessType() const {
return WINHTTP_ACCESS_TYPE_AUTOMATIC_PROXY;
}
absl::optional<ScopedWinHttpProxyInfo> AutoProxyConfiguration::DoGetProxyForUrl(
HINTERNET,
const GURL&) const {
// When using automatic proxy settings, Windows will resolve the proxy
// for us.
DVLOG(3) << "Auto-proxy: skip getting proxy for a url";
return {};
}
} // namespace winhttp
|
