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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "net/http/http_proxy_resolver_winhttp.h"
#include <windows.h>
#include <winhttp.h>
#include "base/histogram.h"
#include "net/base/net_errors.h"
#pragma comment(lib, "winhttp.lib")
namespace net {
// A small wrapper for histogramming purposes ;-)
static BOOL CallWinHttpGetProxyForUrl(HINTERNET session, LPCWSTR url,
WINHTTP_AUTOPROXY_OPTIONS* options,
WINHTTP_PROXY_INFO* results) {
TimeTicks time_start = TimeTicks::Now();
BOOL rv = WinHttpGetProxyForUrl(session, url, options, results);
TimeDelta time_delta = TimeTicks::Now() - time_start;
// Record separately success and failure times since they will have very
// different characteristics.
if (rv) {
UMA_HISTOGRAM_LONG_TIMES(L"Net.GetProxyForUrl_OK", time_delta);
} else {
UMA_HISTOGRAM_LONG_TIMES(L"Net.GetProxyForUrl_FAIL", time_delta);
}
return rv;
}
static void FreeConfig(WINHTTP_CURRENT_USER_IE_PROXY_CONFIG* config) {
if (config->lpszAutoConfigUrl)
GlobalFree(config->lpszAutoConfigUrl);
if (config->lpszProxy)
GlobalFree(config->lpszProxy);
if (config->lpszProxyBypass)
GlobalFree(config->lpszProxyBypass);
}
static void FreeInfo(WINHTTP_PROXY_INFO* info) {
if (info->lpszProxy)
GlobalFree(info->lpszProxy);
if (info->lpszProxyBypass)
GlobalFree(info->lpszProxyBypass);
}
HttpProxyResolverWinHttp::HttpProxyResolverWinHttp()
: session_handle_(NULL) {
}
HttpProxyResolverWinHttp::~HttpProxyResolverWinHttp() {
CloseWinHttpSession();
}
int HttpProxyResolverWinHttp::GetProxyConfig(HttpProxyConfig* config) {
WINHTTP_CURRENT_USER_IE_PROXY_CONFIG ie_config = {0};
if (!WinHttpGetIEProxyConfigForCurrentUser(&ie_config)) {
LOG(ERROR) << "WinHttpGetIEProxyConfigForCurrentUser failed: " <<
GetLastError();
return ERR_FAILED; // TODO(darin): Bug 1189288: translate error code.
}
if (ie_config.fAutoDetect)
config->auto_detect = true;
if (ie_config.lpszProxy)
config->proxy_server = ie_config.lpszProxy;
if (ie_config.lpszProxyBypass)
config->proxy_bypass = ie_config.lpszProxyBypass;
if (ie_config.lpszAutoConfigUrl)
config->pac_url = ie_config.lpszAutoConfigUrl;
FreeConfig(&ie_config);
return OK;
}
int HttpProxyResolverWinHttp::GetProxyForURL(const std::wstring& query_url,
const std::wstring& pac_url,
HttpProxyInfo* results) {
// If we don't have a WinHTTP session, then create a new one.
if (!session_handle_ && !OpenWinHttpSession())
return ERR_FAILED;
// If we have been given an empty PAC url, then use auto-detection.
//
// NOTE: We just use DNS-based auto-detection here like Firefox. We do this
// to avoid WinHTTP's auto-detection code, which while more featureful (it
// supports DHCP based auto-detection) also appears to have issues.
//
WINHTTP_AUTOPROXY_OPTIONS options = {0};
options.fAutoLogonIfChallenged = TRUE;
options.dwFlags = WINHTTP_AUTOPROXY_CONFIG_URL;
options.lpszAutoConfigUrl =
pac_url.empty() ? L"http://wpad/wpad.dat" : pac_url.c_str();
WINHTTP_PROXY_INFO info = {0};
DCHECK(session_handle_);
if (!CallWinHttpGetProxyForUrl(session_handle_, query_url.c_str(), &options,
&info)) {
DWORD error = GetLastError();
LOG(ERROR) << "WinHttpGetProxyForUrl failed: " << error;
// If we got here because of RPC timeout during out of process PAC
// resolution, no further requests on this session are going to work.
if ((ERROR_WINHTTP_TIMEOUT == error) ||
(ERROR_WINHTTP_AUTO_PROXY_SERVICE_ERROR == error)) {
CloseWinHttpSession();
}
return ERR_FAILED; // TODO(darin): Bug 1189288: translate error code.
}
int rv = OK;
switch (info.dwAccessType) {
case WINHTTP_ACCESS_TYPE_NO_PROXY:
results->UseDirect();
break;
case WINHTTP_ACCESS_TYPE_NAMED_PROXY:
results->UseNamedProxy(info.lpszProxy);
break;
default:
NOTREACHED();
rv = ERR_FAILED;
}
FreeInfo(&info);
return rv;
}
bool HttpProxyResolverWinHttp::OpenWinHttpSession() {
DCHECK(!session_handle_);
session_handle_ = WinHttpOpen(NULL,
WINHTTP_ACCESS_TYPE_NO_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS,
0);
if (!session_handle_)
return false;
// Since this session handle will never be used for winhttp connections,
// these timeouts don't really mean much individually. However, WinHTTP's
// out of process PAC resolution will use a combined (sum of all timeouts)
// value to wait for an RPC reply.
BOOL rv = WinHttpSetTimeouts(session_handle_, 10000, 10000, 5000, 5000);
DCHECK(rv);
return true;
}
void HttpProxyResolverWinHttp::CloseWinHttpSession() {
if (session_handle_) {
WinHttpCloseHandle(session_handle_);
session_handle_ = NULL;
}
}
} // namespace net
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