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// Copyright (c) 2006-2008 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/renderer_host/safe_browsing_resource_handler.h"
#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
// Maximum time to wait for a gethash response from the Safe Browsing servers.
static const int kMaxGetHashMs = 1000;
SafeBrowsingResourceHandler::SafeBrowsingResourceHandler(
ResourceHandler* handler,
int render_process_host_id,
int render_view_id,
const GURL& url,
ResourceType::Type resource_type,
SafeBrowsingService* safe_browsing,
ResourceDispatcherHost* resource_dispatcher_host)
: next_handler_(handler),
render_process_host_id_(render_process_host_id),
render_view_id_(render_view_id),
paused_request_id_(-1),
in_safe_browsing_check_(false),
displaying_blocking_page_(false),
safe_browsing_(safe_browsing),
queued_error_request_id_(-1),
rdh_(resource_dispatcher_host),
resource_type_(resource_type) {
if (safe_browsing_->CheckUrl(url, this)) {
safe_browsing_result_ = SafeBrowsingService::URL_SAFE;
safe_browsing_->LogPauseDelay(base::TimeDelta()); // No delay.
} else {
AddRef();
in_safe_browsing_check_ = true;
// Can't pause now because it's too early, so we'll do it in OnWillRead.
}
}
SafeBrowsingResourceHandler::~SafeBrowsingResourceHandler() {
// If we're being deleted before the SafeBrowsing check has completed, cancel
// the check.
if (in_safe_browsing_check_)
safe_browsing_->CancelCheck(this);
}
bool SafeBrowsingResourceHandler::OnUploadProgress(int request_id,
uint64 position,
uint64 size) {
return next_handler_->OnUploadProgress(request_id, position, size);
}
bool SafeBrowsingResourceHandler::OnRequestRedirected(int request_id,
const GURL& new_url) {
if (in_safe_browsing_check_) {
Release();
in_safe_browsing_check_ = false;
safe_browsing_->CancelCheck(this);
}
if (safe_browsing_->CheckUrl(new_url, this)) {
safe_browsing_result_ = SafeBrowsingService::URL_SAFE;
safe_browsing_->LogPauseDelay(base::TimeDelta()); // No delay.
} else {
AddRef();
in_safe_browsing_check_ = true;
// Can't pause now because it's too early, so we'll do it in OnWillRead.
}
return next_handler_->OnRequestRedirected(request_id, new_url);
}
bool SafeBrowsingResourceHandler::OnResponseStarted(
int request_id, ResourceResponse* response) {
return next_handler_->OnResponseStarted(request_id, response);
}
void SafeBrowsingResourceHandler::OnGetHashTimeout() {
if (!in_safe_browsing_check_)
return;
safe_browsing_->CancelCheck(this);
OnUrlCheckResult(GURL::EmptyGURL(), SafeBrowsingService::URL_SAFE);
}
bool SafeBrowsingResourceHandler::OnWillRead(int request_id,
net::IOBuffer** buf, int* buf_size,
int min_size) {
if (in_safe_browsing_check_ && pause_time_.is_null()) {
pause_time_ = base::Time::Now();
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
NewRunnableMethod(this, &SafeBrowsingResourceHandler::OnGetHashTimeout),
kMaxGetHashMs);
}
if (in_safe_browsing_check_ || displaying_blocking_page_) {
rdh_->PauseRequest(render_process_host_id_, request_id, true);
paused_request_id_ = request_id;
}
return next_handler_->OnWillRead(request_id, buf, buf_size, min_size);
}
bool SafeBrowsingResourceHandler::OnReadCompleted(int request_id,
int* bytes_read) {
return next_handler_->OnReadCompleted(request_id, bytes_read);
}
bool SafeBrowsingResourceHandler::OnResponseCompleted(
int request_id, const URLRequestStatus& status,
const std::string& security_info) {
if ((in_safe_browsing_check_ ||
safe_browsing_result_ != SafeBrowsingService::URL_SAFE) &&
status.status() == URLRequestStatus::FAILED &&
status.os_error() == net::ERR_NAME_NOT_RESOLVED) {
// Got a DNS error while the safebrowsing check is in progress or we
// already know that the site is unsafe. Don't show the the dns error
// page.
queued_error_.reset(new URLRequestStatus(status));
queued_error_request_id_ = request_id;
queued_security_info_ = security_info;
return true;
}
return next_handler_->OnResponseCompleted(request_id, status, security_info);
}
// SafeBrowsingService::Client implementation, called on the IO thread once
// the URL has been classified.
void SafeBrowsingResourceHandler::OnUrlCheckResult(
const GURL& url, SafeBrowsingService::UrlCheckResult result) {
DCHECK(in_safe_browsing_check_);
DCHECK(!displaying_blocking_page_);
safe_browsing_result_ = result;
in_safe_browsing_check_ = false;
if (result == SafeBrowsingService::URL_SAFE) {
if (paused_request_id_ != -1) {
rdh_->PauseRequest(render_process_host_id_, paused_request_id_, false);
paused_request_id_ = -1;
}
base::TimeDelta pause_delta;
if (!pause_time_.is_null())
pause_delta = base::Time::Now() - pause_time_;
safe_browsing_->LogPauseDelay(pause_delta);
if (queued_error_.get()) {
next_handler_->OnResponseCompleted(
queued_error_request_id_, *queued_error_.get(),
queued_security_info_);
queued_error_.reset();
queued_security_info_.clear();
}
Release();
} else {
displaying_blocking_page_ = true;
safe_browsing_->DisplayBlockingPage(
url, resource_type_, result, this, rdh_->ui_loop(),
render_process_host_id_, render_view_id_);
}
}
// SafeBrowsingService::Client implementation, called on the IO thread when
// the user has decided to proceed with the current request, or go back.
void SafeBrowsingResourceHandler::OnBlockingPageComplete(bool proceed) {
DCHECK(displaying_blocking_page_);
displaying_blocking_page_ = false;
if (proceed) {
safe_browsing_result_ = SafeBrowsingService::URL_SAFE;
if (paused_request_id_ != -1) {
rdh_->PauseRequest(render_process_host_id_, paused_request_id_, false);
paused_request_id_ = -1;
}
if (queued_error_.get()) {
next_handler_->OnResponseCompleted(
queued_error_request_id_, *queued_error_.get(),
queued_security_info_);
queued_error_.reset();
queued_security_info_.clear();
}
} else {
rdh_->CancelRequest(render_process_host_id_, paused_request_id_, false);
}
Release();
}
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