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// Copyright 2016 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.
#if !defined(OS_CHROMEOS)
#include "chrome/browser/ui/webui/settings_utils.h"
#include <stddef.h>
#include "base/bind.h"
#include "base/environment.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/nix/xdg_util.h"
#include "base/process/launch.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "chrome/browser/tab_contents/tab_util.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
using content::BrowserThread;
using content::OpenURLParams;
using content::Referrer;
namespace settings_utils {
// Command used to configure GNOME 2 proxy settings.
const char* kGNOME2ProxyConfigCommand[] = {"gnome-network-properties", NULL};
// In GNOME 3, we might need to run gnome-control-center instead. We try this
// only after gnome-network-properties is not found, because older GNOME also
// has this but it doesn't do the same thing. See below where we use it.
const char* kGNOME3ProxyConfigCommand[] = {"gnome-control-center", "network",
NULL};
// KDE3, 4, and 5 are only slightly different, but incompatible. Go figure.
const char* kKDE3ProxyConfigCommand[] = {"kcmshell", "proxy", NULL};
const char* kKDE4ProxyConfigCommand[] = {"kcmshell4", "proxy", NULL};
const char* kKDE5ProxyConfigCommand[] = {"kcmshell5", "proxy", NULL};
// The URL for Linux proxy configuration help when not running under a
// supported desktop environment.
const char kLinuxProxyConfigUrl[] = "about:linux-proxy-config";
namespace {
// Show the proxy config URL in the given tab.
void ShowLinuxProxyConfigUrl(int render_process_id, int render_view_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
scoped_ptr<base::Environment> env(base::Environment::Create());
const char* name = base::nix::GetDesktopEnvironmentName(env.get());
if (name)
LOG(ERROR) << "Could not find " << name << " network settings in $PATH";
OpenURLParams params(
GURL(kLinuxProxyConfigUrl), Referrer(), NEW_FOREGROUND_TAB,
ui::PAGE_TRANSITION_LINK, false);
content::WebContents* web_contents =
tab_util::GetWebContentsByID(render_process_id, render_view_id);
if (web_contents)
web_contents->OpenURL(params);
}
// Start the given proxy configuration utility.
bool StartProxyConfigUtil(const char* command[]) {
DCHECK_CURRENTLY_ON(BrowserThread::FILE);
// base::LaunchProcess() returns true ("success") if the fork()
// succeeds, but not necessarily the exec(). We'd like to be able to
// use StartProxyConfigUtil() to search possible options and stop on
// success, so we search $PATH first to predict whether the exec is
// expected to succeed.
// TODO(mdm): this is a useful check, and is very similar to some
// code in proxy_config_service_linux.cc. It should probably be in
// base:: somewhere.
scoped_ptr<base::Environment> env(base::Environment::Create());
std::string path;
if (!env->GetVar("PATH", &path)) {
LOG(ERROR) << "No $PATH variable. Assuming no " << command[0] << ".";
return false;
}
bool found = false;
for (const base::StringPiece& cur_path :
base::SplitStringPiece(path, ":", base::KEEP_WHITESPACE,
base::SPLIT_WANT_NONEMPTY)) {
base::FilePath file(cur_path);
if (base::PathExists(file.Append(command[0]))) {
found = true;
break;
}
}
if (!found)
return false;
std::vector<std::string> argv;
for (size_t i = 0; command[i]; ++i)
argv.push_back(command[i]);
base::Process process = base::LaunchProcess(argv, base::LaunchOptions());
if (!process.IsValid()) {
LOG(ERROR) << "StartProxyConfigUtil failed to start " << command[0];
return false;
}
base::EnsureProcessGetsReaped(process.Pid());
return true;
}
// Detect, and if possible, start the appropriate proxy config utility. On
// failure to do so, show the Linux proxy config URL in a new tab instead.
void DetectAndStartProxyConfigUtil(int render_process_id,
int render_view_id) {
DCHECK_CURRENTLY_ON(BrowserThread::FILE);
scoped_ptr<base::Environment> env(base::Environment::Create());
bool launched = false;
switch (base::nix::GetDesktopEnvironment(env.get())) {
case base::nix::DESKTOP_ENVIRONMENT_GNOME:
case base::nix::DESKTOP_ENVIRONMENT_UNITY: {
launched = StartProxyConfigUtil(kGNOME2ProxyConfigCommand);
if (!launched) {
// We try this second, even though it's the newer way, because this
// command existed in older versions of GNOME, but it didn't do the
// same thing. The older command is gone though, so this should do
// the right thing. (Also some distributions have blurred the lines
// between GNOME 2 and 3, so we can't necessarily detect what the
// right thing is based on indications of which version we have.)
launched = StartProxyConfigUtil(kGNOME3ProxyConfigCommand);
}
break;
}
case base::nix::DESKTOP_ENVIRONMENT_KDE3:
launched = StartProxyConfigUtil(kKDE3ProxyConfigCommand);
break;
case base::nix::DESKTOP_ENVIRONMENT_KDE4:
launched = StartProxyConfigUtil(kKDE4ProxyConfigCommand);
break;
case base::nix::DESKTOP_ENVIRONMENT_KDE5:
launched = StartProxyConfigUtil(kKDE5ProxyConfigCommand);
break;
case base::nix::DESKTOP_ENVIRONMENT_XFCE:
case base::nix::DESKTOP_ENVIRONMENT_OTHER:
break;
}
if (launched)
return;
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&ShowLinuxProxyConfigUrl, render_process_id, render_view_id));
}
} // anonymous namespace
void ShowNetworkProxySettings(content::WebContents* web_contents) {
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&DetectAndStartProxyConfigUtil,
web_contents->GetRenderProcessHost()->GetID(),
web_contents->GetRenderViewHost()->GetRoutingID()));
}
} // namespace settings_utils
#endif // !defined(OS_CHROMEOS)
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