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// 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/browser/extensions/api/identity/web_auth_flow.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/location.h"
#include "base/message_loop.h"
#include "base/stringprintf.h"
#include "base/string_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/common/chrome_switches.h"
#include "content/public/browser/load_notification_details.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/resource_request_details.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/page_transition_types.h"
#include "googleurl/src/gurl.h"
#include "webkit/glue/window_open_disposition.h"
#include "ipc/ipc_message.h"
using content::LoadNotificationDetails;
using content::NavigationController;
using content::RenderViewHost;
using content::ResourceRedirectDetails;
using content::WebContents;
using content::WebContentsObserver;
namespace {
static const char kChromeExtensionSchemeUrlPattern[] =
"chrome-extension://%s/";
static const char kChromiumDomainRedirectUrlPattern[] =
"https://%s.chromiumapp.org/";
} // namespace
namespace extensions {
WebAuthFlow::WebAuthFlow(
Delegate* delegate,
Profile* profile,
const std::string& extension_id,
const GURL& provider_url,
Mode mode,
const gfx::Rect& initial_bounds,
chrome::HostDesktopType host_desktop_type)
: delegate_(delegate),
profile_(profile),
provider_url_(provider_url),
mode_(mode),
initial_bounds_(initial_bounds),
host_desktop_type_(host_desktop_type),
popup_shown_(false),
contents_(NULL) {
InitValidRedirectUrlPrefixes(extension_id);
}
WebAuthFlow::~WebAuthFlow() {
// Set the delegate to NULL to avoid reporting results twice.
delegate_ = NULL;
// Stop listening to notifications first since some of the code
// below may generate notifications.
registrar_.RemoveAll();
if (contents_) {
if (popup_shown_) {
contents_->Close();
} else {
contents_->Stop();
// Tell message loop to delete contents_ instead of deleting it
// directly since destructor can run in response to a callback from
// contents_.
MessageLoop::current()->DeleteSoon(FROM_HERE, contents_);
}
}
}
void WebAuthFlow::Start() {
contents_ = CreateWebContents();
WebContentsObserver::Observe(contents_);
NavigationController* controller = &(contents_->GetController());
// Register for appropriate notifications to intercept navigation to the
// redirect URLs.
registrar_.Add(
this,
content::NOTIFICATION_RESOURCE_RECEIVED_REDIRECT,
content::Source<WebContents>(contents_));
controller->LoadURL(
provider_url_,
content::Referrer(),
content::PAGE_TRANSITION_AUTO_TOPLEVEL,
std::string());
}
WebContents* WebAuthFlow::CreateWebContents() {
return WebContents::Create(WebContents::CreateParams(profile_));
}
void WebAuthFlow::ShowAuthFlowPopup() {
Browser::CreateParams browser_params(Browser::TYPE_POPUP, profile_,
host_desktop_type_);
browser_params.initial_bounds = initial_bounds_;
Browser* browser = new Browser(browser_params);
chrome::NavigateParams params(browser, contents_);
params.disposition = CURRENT_TAB;
params.window_action = chrome::NavigateParams::SHOW_WINDOW;
chrome::Navigate(¶ms);
// Observe method and WebContentsObserver::* methods will be called
// for varous navigation events. That is where we check for redirect
// to the right URL.
popup_shown_ = true;
}
bool WebAuthFlow::BeforeUrlLoaded(const GURL& url) {
if (IsValidRedirectUrl(url)) {
ReportResult(url);
return true;
}
return false;
}
void WebAuthFlow::AfterUrlLoaded() {
// Do nothing if a popup is already created.
if (popup_shown_)
return;
// Report results directly if not in interactive mode.
if (mode_ != WebAuthFlow::INTERACTIVE) {
ReportResult(GURL());
return;
}
// We are in interactive mode and window is not shown yet; show the window.
ShowAuthFlowPopup();
}
void WebAuthFlow::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case content::NOTIFICATION_RESOURCE_RECEIVED_REDIRECT: {
ResourceRedirectDetails* redirect_details =
content::Details<ResourceRedirectDetails>(details).ptr();
if (redirect_details != NULL)
BeforeUrlLoaded(redirect_details->new_url);
}
break;
default:
NOTREACHED() << "Got a notification that we did not register for: "
<< type;
break;
}
}
void WebAuthFlow::ProvisionalChangeToMainFrameUrl(
const GURL& url,
RenderViewHost* render_view_host) {
BeforeUrlLoaded(url);
}
void WebAuthFlow::DidStopLoading(RenderViewHost* render_view_host) {
AfterUrlLoaded();
}
void WebAuthFlow::WebContentsDestroyed(WebContents* web_contents) {
contents_ = NULL;
ReportResult(GURL());
}
void WebAuthFlow::ReportResult(const GURL& url) {
if (!delegate_)
return;
if (url.is_empty()) {
delegate_->OnAuthFlowFailure();
} else {
// TODO(munjal): Consider adding code to parse out access token
// from some common places (e.g. URL fragment) so the apps don't
// have to do that work.
delegate_->OnAuthFlowSuccess(url.spec());
}
// IMPORTANT: Do not access any members after calling the delegate
// since the delegate can destroy |this| in the callback and hence
// all data members are invalid after that.
}
bool WebAuthFlow::IsValidRedirectUrl(const GURL& url) const {
std::vector<std::string>::const_iterator iter;
for (iter = valid_prefixes_.begin(); iter != valid_prefixes_.end(); ++iter) {
if (StartsWithASCII(url.spec(), *iter, false)) {
return true;
}
}
return false;
}
void WebAuthFlow::InitValidRedirectUrlPrefixes(
const std::string& extension_id) {
valid_prefixes_.push_back(base::StringPrintf(
kChromeExtensionSchemeUrlPattern, extension_id.c_str()));
valid_prefixes_.push_back(base::StringPrintf(
kChromiumDomainRedirectUrlPattern, extension_id.c_str()));
}
} // namespace extensions
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