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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 "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 "ipc/ipc_message.h"
#include "ipc/ipc_message_macros.h"
#include "net/base/net_errors.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/web/WebDataSource.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "url/gurl.h"
using chrome_common_net::DnsProbeResult;
using content::RenderThread;
using content::RenderView;
using content::RenderViewObserver;
using content::kUnreachableWebDataURL;
namespace {
GURL GetProvisionallyLoadingURLFromWebFrame(WebKit::WebFrame* frame) {
return frame->provisionalDataSource()->request().url();
}
bool IsErrorPage(const GURL& url) {
return (url.spec() == kUnreachableWebDataURL);
}
// Returns whether |net_error| is a DNS-related error (and therefore whether
// the tab helper should start a DNS probe after receiving it.)
bool IsDnsError(int net_error) {
return net_error == net::ERR_NAME_NOT_RESOLVED ||
net_error == net::ERR_NAME_RESOLUTION_FAILED;
}
NetErrorTracker::FrameType GetFrameType(WebKit::WebFrame* frame) {
return frame->parent() ? NetErrorTracker::FRAME_SUB
: NetErrorTracker::FRAME_MAIN;
}
NetErrorTracker::PageType GetPageType(WebKit::WebFrame* frame) {
bool error_page = IsErrorPage(GetProvisionallyLoadingURLFromWebFrame(frame));
return error_page ? NetErrorTracker::PAGE_ERROR
: NetErrorTracker::PAGE_NORMAL;
}
NetErrorTracker::ErrorType GetErrorType(const WebKit::WebURLError& error) {
return IsDnsError(error.reason) ? NetErrorTracker::ERROR_DNS
: NetErrorTracker::ERROR_OTHER;
}
// Converts a DNS probe result into a net error. Returns OK if the error page
// should not be changed from the original DNS error.
int DnsProbeResultToNetError(DnsProbeResult result) {
switch (result) {
case chrome_common_net::DNS_PROBE_UNKNOWN:
return net::OK;
case chrome_common_net::DNS_PROBE_NO_INTERNET:
// TODO(ttuttle): This is not the same error as when NCN returns this;
// ideally we should have two separate error codes for "no network" and
// "network with no internet".
return net::ERR_INTERNET_DISCONNECTED;
case chrome_common_net::DNS_PROBE_BAD_CONFIG:
// This is unspecific enough that we should still show the full DNS error
// page.
return net::OK;
case chrome_common_net::DNS_PROBE_NXDOMAIN:
return net::ERR_NAME_NOT_RESOLVED;
default:
NOTREACHED();
return net::OK;
}
}
WebKit::WebURLError NetErrorToWebURLError(int net_error) {
WebKit::WebURLError error;
error.domain = WebKit::WebString::fromUTF8(net::kErrorDomain);
error.reason = net_error;
return error;
}
} // namespace
NetErrorHelper::NetErrorHelper(RenderView* render_view)
: RenderViewObserver(render_view),
tracker_(base::Bind(&NetErrorHelper::TrackerCallback,
base::Unretained(this))),
dns_error_page_state_(NetErrorTracker::DNS_ERROR_PAGE_NONE),
updated_error_page_(false),
is_failed_post_(false) {
}
NetErrorHelper::~NetErrorHelper() {
}
void NetErrorHelper::DidStartProvisionalLoad(WebKit::WebFrame* frame) {
tracker_.OnStartProvisionalLoad(GetFrameType(frame), GetPageType(frame));
}
void NetErrorHelper::DidFailProvisionalLoad(WebKit::WebFrame* frame,
const WebKit::WebURLError& error) {
WebKit::WebDataSource* data_source = frame->provisionalDataSource();
const WebKit::WebURLRequest& failed_request = data_source->request();
is_failed_post_ = EqualsASCII(failed_request.httpMethod(), "POST");
tracker_.OnFailProvisionalLoad(GetFrameType(frame), GetErrorType(error));
}
void NetErrorHelper::DidCommitProvisionalLoad(WebKit::WebFrame* frame,
bool is_new_navigation) {
tracker_.OnCommitProvisionalLoad(GetFrameType(frame));
}
void NetErrorHelper::DidFinishLoad(WebKit::WebFrame* frame) {
tracker_.OnFinishLoad(GetFrameType(frame));
}
bool NetErrorHelper::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(NetErrorHelper, message)
IPC_MESSAGE_HANDLER(ChromeViewMsg_NetErrorInfo, OnNetErrorInfo)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void NetErrorHelper::OnNetErrorInfo(int dns_probe_result) {
DVLOG(1) << "Received DNS probe result " << dns_probe_result;
if (dns_probe_result < 0 ||
dns_probe_result >= chrome_common_net::DNS_PROBE_MAX) {
DLOG(WARNING) << "Ignoring DNS probe result: invalid result "
<< dns_probe_result;
NOTREACHED();
return;
}
if (dns_error_page_state_ != NetErrorTracker::DNS_ERROR_PAGE_LOADED) {
DVLOG(1) << "Ignoring DNS probe result: not on DNS error page.";
return;
}
if (updated_error_page_) {
DVLOG(1) << "Ignoring DNS probe result: already updated error page.";
return;
}
UpdateErrorPage(static_cast<DnsProbeResult>(dns_probe_result));
updated_error_page_ = true;
}
void NetErrorHelper::TrackerCallback(
NetErrorTracker::DnsErrorPageState state) {
dns_error_page_state_ = state;
if (state == NetErrorTracker::DNS_ERROR_PAGE_LOADED)
updated_error_page_ = false;
}
void NetErrorHelper::UpdateErrorPage(DnsProbeResult dns_probe_result) {
DVLOG(1) << "Updating error page with result " << dns_probe_result;
int net_error = DnsProbeResultToNetError(dns_probe_result);
if (net_error == net::OK)
return;
DVLOG(1) << "net error code is " << net_error;
base::DictionaryValue error_strings;
LocalizedError::GetStrings(NetErrorToWebURLError(net_error),
is_failed_post_,
RenderThread::Get()->GetLocale(),
&error_strings);
// TODO(ttuttle): Update error page with error_strings.
}
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