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// Copyright (c) 2013 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/renderer/net/net_error_helper.h"
#include <string>
#include "base/json/json_writer.h"
#include "base/metrics/histogram.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/common/localized_error.h"
#include "chrome/common/net/net_error_info.h"
#include "chrome/common/render_messages.h"
#include "content/public/common/content_client.h"
#include "content/public/common/url_constants.h"
#include "content/public/renderer/content_renderer_client.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/render_view.h"
#include "content/public/renderer/resource_fetcher.h"
#include "grit/renderer_resources.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_message_macros.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/platform/WebURLError.h"
#include "third_party/WebKit/public/platform/WebURLRequest.h"
#include "third_party/WebKit/public/platform/WebURLResponse.h"
#include "third_party/WebKit/public/web/WebDataSource.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/webui/jstemplate_builder.h"
#include "url/gurl.h"
using base::JSONWriter;
using chrome_common_net::DnsProbeStatus;
using chrome_common_net::DnsProbeStatusToString;
using content::RenderThread;
using content::RenderView;
using content::RenderViewObserver;
using content::kUnreachableWebDataURL;
namespace {
// Number of seconds to wait for the alternate error page server. If it takes
// too long, just use the local error page.
static const int kAlterErrorPageFetchTimeoutSec = 3000;
NetErrorHelperCore::PageType GetLoadingPageType(const blink::WebFrame* frame) {
GURL url = frame->provisionalDataSource()->request().url();
if (!url.is_valid() || url.spec() != kUnreachableWebDataURL)
return NetErrorHelperCore::NON_ERROR_PAGE;
return NetErrorHelperCore::ERROR_PAGE;
}
NetErrorHelperCore::FrameType GetFrameType(const blink::WebFrame* frame) {
if (!frame->parent())
return NetErrorHelperCore::MAIN_FRAME;
return NetErrorHelperCore::SUB_FRAME;
}
} // namespace
NetErrorHelper::NetErrorHelper(RenderView* render_view)
: RenderViewObserver(render_view),
content::RenderViewObserverTracker<NetErrorHelper>(render_view),
core_(this) {
}
NetErrorHelper::~NetErrorHelper() {
}
void NetErrorHelper::DidStartProvisionalLoad(blink::WebFrame* frame) {
core_.OnStartLoad(GetFrameType(frame), GetLoadingPageType(frame));
}
void NetErrorHelper::DidCommitProvisionalLoad(blink::WebFrame* frame,
bool is_new_navigation) {
core_.OnCommitLoad(GetFrameType(frame));
}
void NetErrorHelper::DidFinishLoad(blink::WebFrame* frame) {
core_.OnFinishLoad(GetFrameType(frame));
}
void NetErrorHelper::OnStop() {
core_.OnStop();
}
bool NetErrorHelper::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(NetErrorHelper, message)
IPC_MESSAGE_HANDLER(ChromeViewMsg_NetErrorInfo, OnNetErrorInfo)
IPC_MESSAGE_HANDLER(ChromeViewMsg_SetAltErrorPageURL, OnSetAltErrorPageURL);
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void NetErrorHelper::GetErrorHTML(
blink::WebFrame* frame,
const blink::WebURLError& error,
bool is_failed_post,
std::string* error_html) {
core_.GetErrorHTML(GetFrameType(frame), error, is_failed_post, error_html);
}
void NetErrorHelper::GenerateLocalizedErrorPage(const blink::WebURLError& error,
bool is_failed_post,
std::string* error_html) const {
error_html->clear();
int resource_id = IDR_NET_ERROR_HTML;
const base::StringPiece template_html(
ResourceBundle::GetSharedInstance().GetRawDataResource(resource_id));
if (template_html.empty()) {
NOTREACHED() << "unable to load template.";
} else {
base::DictionaryValue error_strings;
LocalizedError::GetStrings(error.reason, error.domain.utf8(),
error.unreachableURL, is_failed_post,
RenderThread::Get()->GetLocale(),
render_view()->GetAcceptLanguages(),
&error_strings);
// "t" is the id of the template's root node.
*error_html = webui::GetTemplatesHtml(template_html, &error_strings, "t");
}
}
void NetErrorHelper::LoadErrorPageInMainFrame(const std::string& html,
const GURL& failed_url) {
blink::WebView* web_view = render_view()->GetWebView();
if (!web_view)
return;
blink::WebFrame* frame = web_view->mainFrame();
frame->loadHTMLString(html, GURL(kUnreachableWebDataURL), failed_url, true);
}
void NetErrorHelper::UpdateErrorPage(const blink::WebURLError& error,
bool is_failed_post) {
base::DictionaryValue error_strings;
LocalizedError::GetStrings(error.reason,
error.domain.utf8(),
error.unreachableURL,
is_failed_post,
RenderThread::Get()->GetLocale(),
render_view()->GetAcceptLanguages(),
&error_strings);
std::string json;
JSONWriter::Write(&error_strings, &json);
std::string js = "if (window.updateForDnsProbe) "
"updateForDnsProbe(" + json + ");";
base::string16 js16;
if (!base::UTF8ToUTF16(js.c_str(), js.length(), &js16)) {
NOTREACHED();
return;
}
base::string16 frame_xpath;
render_view()->EvaluateScript(frame_xpath, js16, 0, false);
}
void NetErrorHelper::FetchErrorPage(const GURL& url) {
DCHECK(!alt_error_page_fetcher_.get());
blink::WebView* web_view = render_view()->GetWebView();
if (!web_view)
return;
blink::WebFrame* frame = web_view->mainFrame();
alt_error_page_fetcher_.reset(
content::ResourceFetcher::Create(
url, frame, blink::WebURLRequest::TargetIsMainFrame,
base::Bind(&NetErrorHelper::OnAlternateErrorPageRetrieved,
base::Unretained(this))));
alt_error_page_fetcher_->SetTimeout(
base::TimeDelta::FromSeconds(kAlterErrorPageFetchTimeoutSec));
}
void NetErrorHelper::CancelFetchErrorPage() {
alt_error_page_fetcher_.reset();
}
void NetErrorHelper::OnNetErrorInfo(int status_num) {
DCHECK(status_num >= 0 && status_num < chrome_common_net::DNS_PROBE_MAX);
DVLOG(1) << "Received status " << DnsProbeStatusToString(status_num);
core_.OnNetErrorInfo(static_cast<DnsProbeStatus>(status_num));
}
void NetErrorHelper::OnSetAltErrorPageURL(const GURL& alt_error_page_url) {
core_.set_alt_error_page_url(alt_error_page_url);
}
void NetErrorHelper::OnAlternateErrorPageRetrieved(
const blink::WebURLResponse& response,
const std::string& data) {
// The fetcher may only be deleted after |data| is passed to |core_|. Move
// it to a temporary to prevent any potential re-entrancy issues.
scoped_ptr<content::ResourceFetcher> fetcher(
alt_error_page_fetcher_.release());
if (!response.isNull() && response.httpStatusCode() == 200) {
core_.OnAlternateErrorPageFetched(data);
} else {
core_.OnAlternateErrorPageFetched("");
}
}
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