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chrome_render_frame_observer.cc
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chrome_render_frame_observer.cc
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// Copyright 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/chrome_render_frame_observer.h"
#include <limits>
#include <string>
#include <vector>
#include "base/command_line.h"
#include "base/metrics/histogram.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/common/chrome_isolated_world_ids.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/crash_keys.h"
#include "chrome/common/prerender_messages.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/prerender/prerender_helper.h"
#include "chrome/renderer/safe_browsing/phishing_classifier_delegate.h"
#include "components/printing/common/print_messages.h"
#include "components/printing/renderer/print_web_view_helper.h"
#include "components/translate/content/renderer/translate_helper.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_view.h"
#include "extensions/common/constants.h"
#include "net/base/net_util.h"
#include "skia/ext/image_operations.h"
#include "third_party/WebKit/public/platform/WebImage.h"
#include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerPromptReply.h"
#include "third_party/WebKit/public/web/WebDataSource.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebElement.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebNode.h"
#include "third_party/WebKit/public/web/WebNodeList.h"
#include "third_party/WebKit/public/web/WebSecurityPolicy.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gfx/geometry/size_f.h"
#include "url/gurl.h"
using blink::WebDataSource;
using blink::WebElement;
using blink::WebLocalFrame;
using blink::WebNode;
using blink::WebNodeList;
using blink::WebString;
using content::SSLStatus;
using content::RenderFrame;
// Delay in milliseconds that we'll wait before capturing the page contents.
static const int kDelayForCaptureMs = 500;
// Typically, we capture the page data once the page is loaded.
// Sometimes, the page never finishes to load, preventing the page capture
// To workaround this problem, we always perform a capture after the following
// delay.
static const int kDelayForForcedCaptureMs = 6000;
// Maximum number of characters in the document to index.
// Any text beyond this point will be clipped.
static const size_t kMaxIndexChars = 65535;
// Constants for UMA statistic collection.
static const char kTranslateCaptureText[] = "Translate.CaptureText";
namespace {
// If the source image is null or occupies less area than
// |thumbnail_min_area_pixels|, we return the image unmodified. Otherwise, we
// scale down the image so that the width and height do not exceed
// |thumbnail_max_size_pixels|, preserving the original aspect ratio.
SkBitmap Downscale(const blink::WebImage& image,
int thumbnail_min_area_pixels,
const gfx::Size& thumbnail_max_size_pixels) {
if (image.isNull())
return SkBitmap();
gfx::Size image_size = image.size();
if (image_size.GetArea() < thumbnail_min_area_pixels)
return image.getSkBitmap();
if (image_size.width() <= thumbnail_max_size_pixels.width() &&
image_size.height() <= thumbnail_max_size_pixels.height())
return image.getSkBitmap();
gfx::SizeF scaled_size = gfx::SizeF(image_size);
if (scaled_size.width() > thumbnail_max_size_pixels.width()) {
scaled_size.Scale(thumbnail_max_size_pixels.width() / scaled_size.width());
}
if (scaled_size.height() > thumbnail_max_size_pixels.height()) {
scaled_size.Scale(
thumbnail_max_size_pixels.height() / scaled_size.height());
}
return skia::ImageOperations::Resize(image.getSkBitmap(),
skia::ImageOperations::RESIZE_GOOD,
static_cast<int>(scaled_size.width()),
static_cast<int>(scaled_size.height()));
}
} // namespace
PageInfo::PageInfo(PageInfoReceiver* context)
: context_(context), capture_timer_(false, false) {
DCHECK(context_);
}
// TODO(dglazkov): Refactor to remove the RenderFrame* argument.
void PageInfo::CapturePageInfoLater(CaptureType capture_type,
RenderFrame* render_frame,
base::TimeDelta delay) {
capture_timer_.Start(
FROM_HERE, delay,
base::Bind(&PageInfo::CapturePageInfo, base::Unretained(this),
render_frame, capture_type));
}
bool PageInfo::IsErrorPage(WebLocalFrame* frame) {
WebDataSource* ds = frame->dataSource();
return ds && ds->hasUnreachableURL();
}
void PageInfo::CapturePageInfo(RenderFrame* render_frame,
CaptureType capture_type) {
if (!render_frame)
return;
WebLocalFrame* frame = render_frame->GetWebFrame();
if (!frame)
return;
// Don't index/capture pages that are in view source mode.
if (frame->isViewSourceModeEnabled())
return;
if (IsErrorPage(frame))
return;
// Don't index/capture pages that are being prerendered.
if (prerender::PrerenderHelper::IsPrerendering(render_frame)) {
return;
}
// Retrieve the frame's full text (up to kMaxIndexChars), and pass it to the
// translate helper for language detection and possible translation.
base::string16 contents;
base::TimeTicks capture_begin_time = base::TimeTicks::Now();
CaptureText(frame, &contents);
UMA_HISTOGRAM_TIMES(kTranslateCaptureText,
base::TimeTicks::Now() - capture_begin_time);
context_->PageCaptured(&contents, capture_type);
}
void PageInfo::CaptureText(WebLocalFrame* frame, base::string16* content) {
content->clear();
// Get the contents of the frame.
*content = frame->contentAsText(kMaxIndexChars);
// When the contents are clipped to the maximum, we don't want to have a
// partial word indexed at the end that might have been clipped. Therefore,
// terminate the string at the last space to ensure no words are clipped.
if (content->size() == kMaxIndexChars) {
size_t last_space_index = content->find_last_of(base::kWhitespaceUTF16);
if (last_space_index != base::string16::npos)
content->resize(last_space_index);
}
}
ChromeRenderFrameObserver::ChromeRenderFrameObserver(
content::RenderFrame* render_frame)
: content::RenderFrameObserver(render_frame),
translate_helper_(nullptr),
phishing_classifier_(nullptr),
page_info_(this) {
// Don't do anything for subframes.
if (render_frame->GetWebFrame()->parent())
return;
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
if (!command_line.HasSwitch(switches::kDisableClientSidePhishingDetection))
OnSetClientSidePhishingDetection(true);
translate_helper_ = new translate::TranslateHelper(
render_frame, chrome::ISOLATED_WORLD_ID_TRANSLATE, 0,
extensions::kExtensionScheme);
}
ChromeRenderFrameObserver::~ChromeRenderFrameObserver() {
}
bool ChromeRenderFrameObserver::OnMessageReceived(const IPC::Message& message) {
// Filter only.
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(ChromeRenderFrameObserver, message)
IPC_MESSAGE_HANDLER(PrerenderMsg_SetIsPrerendering, OnSetIsPrerendering)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
if (handled)
return false;
IPC_BEGIN_MESSAGE_MAP(ChromeRenderFrameObserver, message)
IPC_MESSAGE_HANDLER(ChromeViewMsg_RequestReloadImageForContextNode,
OnRequestReloadImageForContextNode)
IPC_MESSAGE_HANDLER(ChromeViewMsg_RequestThumbnailForContextNode,
OnRequestThumbnailForContextNode)
IPC_MESSAGE_HANDLER(ChromeViewMsg_SetClientSidePhishingDetection,
OnSetClientSidePhishingDetection)
IPC_MESSAGE_HANDLER(PrintMsg_PrintNodeUnderContextMenu,
OnPrintNodeUnderContextMenu)
IPC_MESSAGE_HANDLER(ChromeViewMsg_AppBannerPromptRequest,
OnAppBannerPromptRequest)
IPC_MESSAGE_HANDLER(ChromeViewMsg_AppBannerDebugMessageRequest,
OnAppBannerDebugMessageRequest)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void ChromeRenderFrameObserver::OnSetIsPrerendering(bool is_prerendering) {
if (is_prerendering) {
// If the PrerenderHelper for this frame already exists, don't create it. It
// can already be created for subframes during handling of
// RenderFrameCreated, if the parent frame was prerendering at time of
// subframe creation.
if (prerender::PrerenderHelper::Get(render_frame()))
return;
// The PrerenderHelper will destroy itself either after recording histograms
// or on destruction of the RenderView.
new prerender::PrerenderHelper(render_frame());
}
}
void ChromeRenderFrameObserver::OnRequestReloadImageForContextNode() {
WebNode context_node = render_frame()->GetContextMenuNode();
if (!context_node.isNull() && context_node.isElementNode() &&
render_frame()->GetWebFrame()) {
render_frame()->GetWebFrame()->reloadImage(context_node);
}
}
void ChromeRenderFrameObserver::OnRequestThumbnailForContextNode(
int thumbnail_min_area_pixels,
const gfx::Size& thumbnail_max_size_pixels) {
WebNode context_node = render_frame()->GetContextMenuNode();
SkBitmap thumbnail;
gfx::Size original_size;
if (!context_node.isNull() && context_node.isElementNode()) {
blink::WebImage image = context_node.to<WebElement>().imageContents();
original_size = image.size();
thumbnail = Downscale(image,
thumbnail_min_area_pixels,
thumbnail_max_size_pixels);
}
SkBitmap bitmap;
if (thumbnail.colorType() == kN32_SkColorType)
bitmap = thumbnail;
else
thumbnail.copyTo(&bitmap, kN32_SkColorType);
std::string thumbnail_data;
SkAutoLockPixels lock(bitmap);
if (bitmap.getPixels()) {
const int kDefaultQuality = 90;
std::vector<unsigned char> data;
if (gfx::JPEGCodec::Encode(
reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
gfx::JPEGCodec::FORMAT_SkBitmap, bitmap.width(), bitmap.height(),
static_cast<int>(bitmap.rowBytes()), kDefaultQuality, &data))
thumbnail_data = std::string(data.begin(), data.end());
}
Send(new ChromeViewHostMsg_RequestThumbnailForContextNode_ACK(
routing_id(), thumbnail_data, original_size));
}
void ChromeRenderFrameObserver::OnPrintNodeUnderContextMenu() {
printing::PrintWebViewHelper* helper =
printing::PrintWebViewHelper::Get(render_frame()->GetRenderView());
if (helper)
helper->PrintNode(render_frame()->GetContextMenuNode());
}
void ChromeRenderFrameObserver::OnSetClientSidePhishingDetection(
bool enable_phishing_detection) {
#if defined(FULL_SAFE_BROWSING) && !defined(OS_CHROMEOS)
phishing_classifier_ =
enable_phishing_detection
? safe_browsing::PhishingClassifierDelegate::Create(render_frame(),
nullptr)
: nullptr;
#endif
}
void ChromeRenderFrameObserver::DidFinishDocumentLoad() {
// If the navigation is to a localhost URL (and the flag is set to
// allow localhost SSL misconfigurations), print a warning to the
// console telling the developer to check their SSL configuration
// before going to production.
bool allow_localhost = base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kAllowInsecureLocalhost);
WebDataSource* ds = render_frame()->GetWebFrame()->dataSource();
if (allow_localhost) {
SSLStatus ssl_status = render_frame()->GetRenderView()->GetSSLStatusOfFrame(
render_frame()->GetWebFrame());
bool is_cert_error = net::IsCertStatusError(ssl_status.cert_status) &&
!net::IsCertStatusMinorError(ssl_status.cert_status);
bool is_localhost = net::IsLocalhost(GURL(ds->request().url()).host());
if (is_cert_error && is_localhost) {
render_frame()->GetWebFrame()->addMessageToConsole(
blink::WebConsoleMessage(
blink::WebConsoleMessage::LevelWarning,
base::ASCIIToUTF16(
"This site does not have a valid SSL "
"certificate! Without SSL, your site's and "
"visitors' data is vulnerable to theft and "
"tampering. Get a valid SSL certificate before"
" releasing your website to the public.")));
}
}
}
void ChromeRenderFrameObserver::OnAppBannerPromptRequest(
int request_id,
const std::string& platform) {
// App banner prompt requests are handled in the general chrome render frame
// observer, not the AppBannerClient, as the AppBannerClient is created lazily
// by blink and may not exist when the request is sent.
blink::WebAppBannerPromptReply reply = blink::WebAppBannerPromptReply::None;
blink::WebString web_platform(base::UTF8ToUTF16(platform));
blink::WebVector<blink::WebString> web_platforms(&web_platform, 1);
blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
frame->willShowInstallBannerPrompt(request_id, web_platforms, &reply);
// Extract the referrer header for this site according to its referrer policy.
// Pass in an empty URL as the destination so that it is always treated
// as a cross-origin request.
std::string referrer = blink::WebSecurityPolicy::generateReferrerHeader(
frame->document().referrerPolicy(), GURL(),
frame->document().outgoingReferrer()).utf8();
Send(new ChromeViewHostMsg_AppBannerPromptReply(
routing_id(), request_id, reply, referrer));
}
void ChromeRenderFrameObserver::OnAppBannerDebugMessageRequest(
const std::string& message) {
render_frame()->GetWebFrame()->addMessageToConsole(blink::WebConsoleMessage(
blink::WebConsoleMessage::LevelDebug, base::UTF8ToUTF16(message)));
}
void ChromeRenderFrameObserver::DidFinishLoad() {
WebLocalFrame* frame = render_frame()->GetWebFrame();
// Don't do anything for subframes.
if (frame->parent())
return;
GURL osdd_url = frame->document().openSearchDescriptionURL();
if (!osdd_url.is_empty()) {
Send(new ChromeViewHostMsg_PageHasOSDD(
routing_id(), frame->document().url(), osdd_url,
search_provider::AUTODETECTED_PROVIDER));
}
// Don't capture pages that have pending redirect or location change.
if (frame->isNavigationScheduled())
return;
page_info_.CapturePageInfoLater(
FINAL_CAPTURE, render_frame(),
base::TimeDelta::FromMilliseconds(
render_frame()->GetRenderView()->GetContentStateImmediately()
? 0
: kDelayForCaptureMs));
}
void ChromeRenderFrameObserver::DidStartProvisionalLoad() {
// Let translate_helper do any preparatory work for loading a URL.
if (!translate_helper_)
return;
translate_helper_->PrepareForUrl(
render_frame()->GetWebFrame()->document().url());
}
void ChromeRenderFrameObserver::DidCommitProvisionalLoad(
bool is_new_navigation,
bool is_same_page_navigation) {
WebLocalFrame* frame = render_frame()->GetWebFrame();
// Don't do anything for subframes.
if (frame->parent())
return;
// Don't capture pages being not new, with pending redirect, or location
// change.
if (!is_new_navigation || frame->isNavigationScheduled())
return;
base::debug::SetCrashKeyValue(
crash_keys::kViewCount,
base::SizeTToString(content::RenderView::GetRenderViewCount()));
page_info_.CapturePageInfoLater(
PRELIMINARY_CAPTURE, render_frame(),
base::TimeDelta::FromMilliseconds(kDelayForForcedCaptureMs));
}
void ChromeRenderFrameObserver::PageCaptured(base::string16* content,
CaptureType capture_type) {
if (translate_helper_)
translate_helper_->PageCaptured(*content);
TRACE_EVENT0("renderer", "ChromeRenderViewObserver::CapturePageInfo");
#if defined(FULL_SAFE_BROWSING)
// Will swap out the string.
if (phishing_classifier_)
phishing_classifier_->PageCaptured(content,
capture_type == PRELIMINARY_CAPTURE);
#endif
}