Split to SafeBrowsingDatabaseManager into Local* and Remote*.

chrome/browser/safe_browsing/remote_database_manager.cc

+// Copyright 2015 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/safe_browsing/remote_database_manager.h"
+
+#include <vector>
+
+#include "chrome/browser/safe_browsing/android_safe_browsing_api_handler.h"
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+//
+// RemoteSafeBrowsingDatabaseManager::ClientRequest methods
+//
+class RemoteSafeBrowsingDatabaseManager::ClientRequest {
+ public:
+  ClientRequest(Client* client,
+                RemoteSafeBrowsingDatabaseManager* db_manager,
+                const GURL& url);
+
+  static void OnRequestDoneWeak(const base::WeakPtr<ClientRequest>& req,
+                                SBThreatType matched_threat_type,
+                                const std::string& metadata);
+  void OnRequestDone(SBThreatType matched_threat_type,
+                     const std::string& metadata);
+
+  // Accessors
+  Client* client() const { return client_; }
+  const GURL& url() const { return url_; }
+  base::WeakPtr<ClientRequest> GetWeakPtr() {
+    return weak_factory_.GetWeakPtr();
+  }
+
+ private:
+  Client* client_;
+  RemoteSafeBrowsingDatabaseManager* db_manager_;
+  GURL url_;
+  base::WeakPtrFactory<ClientRequest> weak_factory_;
+};
+
+RemoteSafeBrowsingDatabaseManager::ClientRequest::ClientRequest(
+    Client* client,
+    RemoteSafeBrowsingDatabaseManager* db_manager,
+    const GURL& url)
+    : client_(client), db_manager_(db_manager), url_(url), weak_factory_(this) {
+}
+
+// Static
+void RemoteSafeBrowsingDatabaseManager::ClientRequest::OnRequestDoneWeak(
+    const base::WeakPtr<ClientRequest>& req,
+    SBThreatType matched_threat_type,
+    const std::string& metadata) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  if (!req)
+    return;  // Previously canceled
+  req->OnRequestDone(matched_threat_type, metadata);
+}
+
+void RemoteSafeBrowsingDatabaseManager::ClientRequest::OnRequestDone(
+    SBThreatType matched_threat_type,
+    const std::string& metadata) {
+  VLOG(1) << "OnRequestDone for client " << client_ << " and URL " << url_;
+  client_->OnCheckBrowseUrlResult(url_, matched_threat_type, metadata);
+  db_manager_->CancelCheck(client_);
+}
+
+//
+// RemoteSafeBrowsingDatabaseManager methods
+//
+
+// TODO(nparker): Add tests for this class once implemented.
+RemoteSafeBrowsingDatabaseManager::RemoteSafeBrowsingDatabaseManager()
+    : enabled_(false) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  // TODO(nparker): Implement the initialization glue.
+  // Check flag to see if this is enabled.
+  // Ask AndroidSafeBrowsingAPIHandler if Java API is correct version.
+}
+
+RemoteSafeBrowsingDatabaseManager::~RemoteSafeBrowsingDatabaseManager() {
+  DCHECK(!enabled_);
+}
+
+bool RemoteSafeBrowsingDatabaseManager::CanCheckUrl(const GURL& url) const {
+  return url.SchemeIs(url::kHttpsScheme) || url.SchemeIs(url::kHttpScheme) ||
+         url.SchemeIs(url::kFtpScheme);
+}
+
+bool RemoteSafeBrowsingDatabaseManager::download_protection_enabled()
+    const {
+  return false;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::CheckDownloadUrl(
+    const std::vector<GURL>& url_chain,
+    Client* client) {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::CheckExtensionIDs(
+    const std::set<std::string>& extension_ids,
+    Client* client) {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::MatchMalwareIP(
+    const std::string& ip_address) {
+  NOTREACHED();
+  return false;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::MatchCsdWhitelistUrl(const GURL& url) {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::MatchDownloadWhitelistUrl(
+    const GURL& url) {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::MatchDownloadWhitelistString(
+    const std::string& str) {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::MatchInclusionWhitelistUrl(
+    const GURL& url) {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::IsMalwareKillSwitchOn() {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::IsCsdWhitelistKillSwitchOn() {
+  NOTREACHED();
+  return true;
+}
+
+bool RemoteSafeBrowsingDatabaseManager::CheckBrowseUrl(const GURL& url,
+                                                       Client* client) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  if (!enabled_)
+    return true;
+
+  if (!CanCheckUrl(url))
+    return true;  // Safe, continue right away.
+
+  scoped_ptr<ClientRequest> req(new ClientRequest(client, this, url));
+  std::vector<SBThreatType> threat_types;
+  threat_types.push_back(SB_THREAT_TYPE_URL_MALWARE);
+
+  VLOG(1) << "Checking for client " << client << " and URL " << url;
+  bool started = api_handler_.StartURLCheck(
+      base::Bind(&ClientRequest::OnRequestDoneWeak, req->GetWeakPtr()), url,
+      threat_types);
+  if (!started) {
+    LOG(DFATAL) << "Failed to start Safe Browsing request";
+    return true;
+  }
+
+  current_requests_.push_back(req.release());
+
+  // Defer the resource load.
+  return false;
+}
+
+void RemoteSafeBrowsingDatabaseManager::CancelCheck(Client* client) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(enabled_);
+  for (auto itr = current_requests_.begin(); itr != current_requests_.end();
+       ++itr) {
+    if ((*itr)->client() == client) {
+      VLOG(1) << "Canceling check for URL " << (*itr)->url();
+      delete *itr;
+      current_requests_.erase(itr);
+      return;
+    }
+  }
+  NOTREACHED();
+}
+
+void RemoteSafeBrowsingDatabaseManager::StartOnIOThread() {
+  VLOG(1) << "RemoteSafeBrowsing starting";
+  enabled_ = true;
+}
+
+void RemoteSafeBrowsingDatabaseManager::StopOnIOThread(bool shutdown) {
+  // |shutdown| is not used.
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  VLOG(1) << "RemoteSafeBrowsing stopping";
+
+  // Call back and delete any remaining clients. OnRequestDone() modifies
+  // |current_requests_|, so we make a copy first.
+  std::vector<ClientRequest*> to_callback(current_requests_);
+  for (auto req : to_callback) {
+    VLOG(1) << "Stopping: Invoking unfinished req for URL " << req->url();
+    req->OnRequestDone(SB_THREAT_TYPE_SAFE, std::string());
+  }
+  enabled_ = false;
+}
+