Collect threat details for phishing and UwS

chrome/renderer/safe_browsing/malware_dom_details.cc

-// 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/renderer/safe_browsing/malware_dom_details.h"
-
-#include "base/compiler_specific.h"
-#include "chrome/common/chrome_constants.h"
-#include "chrome/common/safe_browsing/safebrowsing_messages.h"
-#include "content/public/renderer/render_view.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/web/WebDocument.h"
-#include "third_party/WebKit/public/web/WebElement.h"
-#include "third_party/WebKit/public/web/WebElementCollection.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebView.h"
-
-namespace safe_browsing {
-
-namespace {
-
-// Handler for the various HTML elements that we extract URLs from.
-void HandleElement(
-    const blink::WebElement& element,
-    SafeBrowsingHostMsg_MalwareDOMDetails_Node* parent_node,
-    std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node>* resources) {
-  if (!element.hasAttribute("src"))
-    return;
-
-  // Retrieve the link and resolve the link in case it's relative.
-  blink::WebURL full_url = element.document().completeURL(
-      element.getAttribute("src"));
-
-  const GURL& child_url = GURL(full_url);
-
-  // Add to the parent node.
-  parent_node->children.push_back(child_url);
-
-  // Create the child node.
-  SafeBrowsingHostMsg_MalwareDOMDetails_Node child_node;
-  child_node.url = child_url;
-  child_node.tag_name = element.tagName().utf8();
-  child_node.parent = parent_node->url;
-  resources->push_back(child_node);
-}
-
-}  // namespace
-
-// An upper limit on the number of nodes we collect.
-uint32 MalwareDOMDetails::kMaxNodes = 500;
-
-// static
-MalwareDOMDetails* MalwareDOMDetails::Create(content::RenderView* render_view) {
-  // Private constructor and public static Create() method to facilitate
-  // stubbing out this class for binary-size reduction purposes.
-  return new MalwareDOMDetails(render_view);
-}
-
-MalwareDOMDetails::MalwareDOMDetails(content::RenderView* render_view)
-    : content::RenderViewObserver(render_view) {
-}
-
-MalwareDOMDetails::~MalwareDOMDetails() {
-}
-
-bool MalwareDOMDetails::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(MalwareDOMDetails, message)
-    IPC_MESSAGE_HANDLER(SafeBrowsingMsg_GetMalwareDOMDetails,
-                        OnGetMalwareDOMDetails)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void MalwareDOMDetails::OnGetMalwareDOMDetails() {
-  std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node> resources;
-  ExtractResources(&resources);
-  // Notify the browser.
-  render_view()->Send(new SafeBrowsingHostMsg_MalwareDOMDetails(
-      render_view()->GetRoutingID(), resources));
-}
-
-void MalwareDOMDetails::ExtractResources(
-    std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node>* resources) {
-  blink::WebView* web_view = render_view()->GetWebView();
-  if (!web_view) {
-    NOTREACHED();
-    return;
-  }
-  blink::WebFrame* frame = web_view->mainFrame();
-  for (; frame; frame = frame->traverseNext(false /* don't wrap */)) {
-    DCHECK(frame);
-    SafeBrowsingHostMsg_MalwareDOMDetails_Node details_node;
-    blink::WebDocument document = frame->document();
-    details_node.url = GURL(document.url());
-    if (document.isNull()) {
-      // Nothing in this frame, move on to the next one.
-      resources->push_back(details_node);
-      continue;
-    }
-
-    blink::WebElementCollection elements = document.all();
-    blink::WebElement element = elements.firstItem();
-    for (; !element.isNull(); element = elements.nextItem()) {
-      if (element.hasHTMLTagName("iframe") || element.hasHTMLTagName("frame") ||
-          element.hasHTMLTagName("embed") || element.hasHTMLTagName("script")) {
-        HandleElement(element, &details_node, resources);
-        if (resources->size() >= kMaxNodes) {
-          // We have reached kMaxNodes, exit early.
-          resources->push_back(details_node);
-          return;
-        }
-      }
-    }
-
-    resources->push_back(details_node);
-  }
-}
-
-}  // namespace safe_browsing