blob: 6fc7196596c83946a107f7229448392a08129d97 [file] [log] [blame]
// 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 "chrome/browser/ui/webui/nacl_ui.h"
#include <stddef.h>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/metrics/user_metrics.h"
#include "base/path_service.h"
#include "base/strings/string16.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/post_task.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/browser/plugins/plugin_prefs.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/webui/webui_util.h"
#include "chrome/common/channel_info.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/url_constants.h"
#include "chrome/grit/browser_resources.h"
#include "chrome/grit/chromium_strings.h"
#include "components/strings/grit/components_strings.h"
#include "components/version_info/version_info.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/plugin_service.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "content/public/common/webplugininfo.h"
#include "ui/base/l10n/l10n_util.h"
#if defined(OS_WIN)
#include "base/win/windows_version.h"
#endif
using base::ASCIIToUTF16;
using base::UserMetricsAction;
using content::BrowserThread;
using content::PluginService;
using content::WebUIMessageHandler;
using webui::webui_util::AddPair;
namespace {
content::WebUIDataSource* CreateNaClUIHTMLSource() {
content::WebUIDataSource* source =
content::WebUIDataSource::Create(chrome::kChromeUINaClHost);
source->OverrideContentSecurityPolicyScriptSrc(
"script-src chrome://resources 'self' 'unsafe-eval';");
source->SetJsonPath("strings.js");
source->AddResourcePath("about_nacl.css", IDR_ABOUT_NACL_CSS);
source->AddResourcePath("about_nacl.js", IDR_ABOUT_NACL_JS);
source->SetDefaultResource(IDR_ABOUT_NACL_HTML);
return source;
}
////////////////////////////////////////////////////////////////////////////////
//
// NaClDomHandler
//
////////////////////////////////////////////////////////////////////////////////
// The handler for JavaScript messages for the about:flags page.
class NaClDomHandler : public WebUIMessageHandler {
public:
NaClDomHandler();
~NaClDomHandler() override;
// WebUIMessageHandler implementation.
void RegisterMessages() override;
private:
// Callback for the "requestNaClInfo" message.
void HandleRequestNaClInfo(const base::ListValue* args);
// Callback for the NaCl plugin information.
void OnGotPlugins(const std::vector<content::WebPluginInfo>& plugins);
// A helper callback that receives the result of checking if PNaCl path
// exists and checking the PNaCl |version|. |is_valid| is true if the PNaCl
// path that was returned by PathService is valid, and false otherwise.
void DidCheckPathAndVersion(const std::string* version, bool is_valid);
// Called when enough information is gathered to return data back to the page.
void MaybeRespondToPage();
// Helper for MaybeRespondToPage -- called after enough information
// is gathered.
void PopulatePageInformation(base::DictionaryValue* naclInfo);
// Returns whether the specified plugin is enabled.
bool isPluginEnabled(size_t plugin_index);
// Adds information regarding the operating system and chrome version to list.
void AddOperatingSystemInfo(base::ListValue* list);
// Adds the list of plugins for NaCl to list.
void AddPluginList(base::ListValue* list);
// Adds the information relevant to PNaCl (e.g., enablement, paths, version)
// to the list.
void AddPnaclInfo(base::ListValue* list);
// Adds the information relevant to NaCl to list.
void AddNaClInfo(base::ListValue* list);
// The callback ID for requested data.
std::string callback_id_;
// Whether the plugin information is ready.
bool has_plugin_info_;
// Whether PNaCl path was validated. PathService can return a path
// that does not exists, so it needs to be validated.
bool pnacl_path_validated_;
bool pnacl_path_exists_;
std::string pnacl_version_string_;
// Factory for the creating refs in callbacks.
base::WeakPtrFactory<NaClDomHandler> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(NaClDomHandler);
};
NaClDomHandler::NaClDomHandler()
: has_plugin_info_(false),
pnacl_path_validated_(false),
pnacl_path_exists_(false),
weak_ptr_factory_(this) {
PluginService::GetInstance()->GetPlugins(base::Bind(
&NaClDomHandler::OnGotPlugins, weak_ptr_factory_.GetWeakPtr()));
}
NaClDomHandler::~NaClDomHandler() {
}
void NaClDomHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
"requestNaClInfo",
base::BindRepeating(&NaClDomHandler::HandleRequestNaClInfo,
base::Unretained(this)));
}
// Generate an empty data-pair which acts as a line break.
void AddLineBreak(base::ListValue* list) {
AddPair(list, ASCIIToUTF16(""), ASCIIToUTF16(""));
}
bool NaClDomHandler::isPluginEnabled(size_t plugin_index) {
std::vector<content::WebPluginInfo> info_array;
PluginService::GetInstance()->GetPluginInfoArray(
GURL(), "application/x-nacl", false, &info_array, NULL);
PluginPrefs* plugin_prefs =
PluginPrefs::GetForProfile(Profile::FromWebUI(web_ui())).get();
return (!info_array.empty() &&
plugin_prefs->IsPluginEnabled(info_array[plugin_index]));
}
void NaClDomHandler::AddOperatingSystemInfo(base::ListValue* list) {
// Obtain the Chrome version info.
AddPair(list, l10n_util::GetStringUTF16(IDS_PRODUCT_NAME),
ASCIIToUTF16(version_info::GetVersionNumber() + " (" +
chrome::GetChannelName() + ")"));
// OS version information.
// TODO(jvoung): refactor this to share the extra windows labeling
// with about:flash, or something.
std::string os_label = version_info::GetOSType();
#if defined(OS_WIN)
base::win::OSInfo* os = base::win::OSInfo::GetInstance();
switch (os->version()) {
case base::win::VERSION_XP: os_label += " XP"; break;
case base::win::VERSION_SERVER_2003:
os_label += " Server 2003 or XP Pro 64 bit";
break;
case base::win::VERSION_VISTA: os_label += " Vista or Server 2008"; break;
case base::win::VERSION_WIN7: os_label += " 7 or Server 2008 R2"; break;
case base::win::VERSION_WIN8: os_label += " 8 or Server 2012"; break;
default: os_label += " UNKNOWN"; break;
}
os_label += " SP" + base::NumberToString(os->service_pack().major);
if (os->service_pack().minor > 0)
os_label += "." + base::NumberToString(os->service_pack().minor);
if (os->GetArchitecture() == base::win::OSInfo::X64_ARCHITECTURE)
os_label += " 64 bit";
#endif
AddPair(list, l10n_util::GetStringUTF16(IDS_VERSION_UI_OS),
ASCIIToUTF16(os_label));
AddLineBreak(list);
}
void NaClDomHandler::AddPluginList(base::ListValue* list) {
// Obtain the version of the NaCl plugin.
std::vector<content::WebPluginInfo> info_array;
PluginService::GetInstance()->GetPluginInfoArray(
GURL(), "application/x-nacl", false, &info_array, NULL);
base::string16 nacl_version;
base::string16 nacl_key = ASCIIToUTF16("NaCl plugin");
if (info_array.empty()) {
AddPair(list, nacl_key, ASCIIToUTF16("Disabled"));
} else {
// Only the 0th plugin is used.
nacl_version = info_array[0].version + ASCIIToUTF16(" ") +
info_array[0].path.LossyDisplayName();
if (!isPluginEnabled(0)) {
nacl_version += ASCIIToUTF16(" (Disabled in profile prefs)");
}
AddPair(list, nacl_key, nacl_version);
// Mark the rest as not used.
for (size_t i = 1; i < info_array.size(); ++i) {
nacl_version = info_array[i].version + ASCIIToUTF16(" ") +
info_array[i].path.LossyDisplayName();
nacl_version += ASCIIToUTF16(" (not used)");
if (!isPluginEnabled(i)) {
nacl_version += ASCIIToUTF16(" (Disabled in profile prefs)");
}
AddPair(list, nacl_key, nacl_version);
}
}
AddLineBreak(list);
}
void NaClDomHandler::AddPnaclInfo(base::ListValue* list) {
// Display whether PNaCl is enabled.
base::string16 pnacl_enabled_string = ASCIIToUTF16("Enabled");
if (!isPluginEnabled(0)) {
pnacl_enabled_string = ASCIIToUTF16("Disabled in profile prefs");
}
AddPair(list,
ASCIIToUTF16("Portable Native Client (PNaCl)"),
pnacl_enabled_string);
// Obtain the version of the PNaCl translator.
base::FilePath pnacl_path;
bool got_path =
base::PathService::Get(chrome::DIR_PNACL_COMPONENT, &pnacl_path);
if (!got_path || pnacl_path.empty() || !pnacl_path_exists_) {
AddPair(list,
ASCIIToUTF16("PNaCl translator"),
ASCIIToUTF16("Not installed"));
} else {
AddPair(list,
ASCIIToUTF16("PNaCl translator path"),
pnacl_path.LossyDisplayName());
AddPair(list,
ASCIIToUTF16("PNaCl translator version"),
ASCIIToUTF16(pnacl_version_string_));
}
AddLineBreak(list);
}
void NaClDomHandler::AddNaClInfo(base::ListValue* list) {
base::string16 nacl_enabled_string = ASCIIToUTF16("Disabled");
if (isPluginEnabled(0) &&
base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableNaCl)) {
nacl_enabled_string = ASCIIToUTF16("Enabled by flag '--enable-nacl'");
}
AddPair(list,
ASCIIToUTF16("Native Client (non-portable, outside web store)"),
nacl_enabled_string);
AddLineBreak(list);
}
void NaClDomHandler::HandleRequestNaClInfo(const base::ListValue* args) {
CHECK(callback_id_.empty());
CHECK_EQ(1U, args->GetSize());
callback_id_ = args->GetList()[0].GetString();
// Force re-validation of PNaCl's path in the next call to
// MaybeRespondToPage(), in case PNaCl went from not-installed
// to installed since the request.
pnacl_path_validated_ = false;
AllowJavascript();
MaybeRespondToPage();
}
void NaClDomHandler::OnGotPlugins(
const std::vector<content::WebPluginInfo>& plugins) {
has_plugin_info_ = true;
MaybeRespondToPage();
}
void NaClDomHandler::PopulatePageInformation(base::DictionaryValue* naclInfo) {
DCHECK(pnacl_path_validated_);
// Store Key-Value pairs of about-information.
std::unique_ptr<base::ListValue> list(new base::ListValue());
// Display the operating system and chrome version information.
AddOperatingSystemInfo(list.get());
// Display the list of plugins serving NaCl.
AddPluginList(list.get());
// Display information relevant to PNaCl.
AddPnaclInfo(list.get());
// Display information relevant to NaCl (non-portable.
AddNaClInfo(list.get());
// naclInfo will take ownership of list, and clean it up on destruction.
naclInfo->Set("naclInfo", std::move(list));
}
void NaClDomHandler::DidCheckPathAndVersion(const std::string* version,
bool is_valid) {
pnacl_path_validated_ = true;
pnacl_path_exists_ = is_valid;
pnacl_version_string_ = *version;
MaybeRespondToPage();
}
void CheckVersion(const base::FilePath& pnacl_path, std::string* version) {
base::FilePath pnacl_json_path =
pnacl_path.AppendASCII("pnacl_public_pnacl_json");
JSONFileValueDeserializer deserializer(pnacl_json_path);
std::string error;
std::unique_ptr<base::Value> root = deserializer.Deserialize(NULL, &error);
if (!root || !root->is_dict())
return;
// Now try to get the field. This may leave version empty if the
// the "get" fails (no key, or wrong type).
static_cast<base::DictionaryValue*>(root.get())->GetStringASCII(
"pnacl-version", version);
}
bool CheckPathAndVersion(std::string* version) {
base::FilePath pnacl_path;
bool got_path =
base::PathService::Get(chrome::DIR_PNACL_COMPONENT, &pnacl_path);
if (got_path && !pnacl_path.empty() && base::PathExists(pnacl_path)) {
CheckVersion(pnacl_path, version);
return true;
}
return false;
}
void NaClDomHandler::MaybeRespondToPage() {
// Don't reply until everything is ready. The page will show a 'loading'
// message until then.
if (callback_id_.empty() || !has_plugin_info_)
return;
if (!pnacl_path_validated_) {
std::string* version_string = new std::string;
base::PostTaskWithTraitsAndReplyWithResult(
FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
base::Bind(&CheckPathAndVersion, version_string),
base::Bind(&NaClDomHandler::DidCheckPathAndVersion,
weak_ptr_factory_.GetWeakPtr(),
base::Owned(version_string)));
return;
}
base::DictionaryValue naclInfo;
PopulatePageInformation(&naclInfo);
ResolveJavascriptCallback(base::Value(callback_id_), naclInfo);
callback_id_.clear();
}
} // namespace
///////////////////////////////////////////////////////////////////////////////
//
// NaClUI
//
///////////////////////////////////////////////////////////////////////////////
NaClUI::NaClUI(content::WebUI* web_ui) : WebUIController(web_ui) {
base::RecordAction(UserMetricsAction("ViewAboutNaCl"));
web_ui->AddMessageHandler(std::make_unique<NaClDomHandler>());
// Set up the about:nacl source.
Profile* profile = Profile::FromWebUI(web_ui);
content::WebUIDataSource::Add(profile, CreateNaClUIHTMLSource());
}