| // 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. |
| |
| #ifndef CHROME_BROWSER_NET_NET_ERROR_TAB_HELPER_H_ |
| #define CHROME_BROWSER_NET_NET_ERROR_TAB_HELPER_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/bind.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/prefs/pref_member.h" |
| #include "chrome/browser/net/dns_probe_service.h" |
| #include "components/error_page/common/net_error_info.h" |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| |
| namespace chrome_browser_net { |
| |
| // A TabHelper that monitors loads for certain types of network errors and |
| // does interesting things with them. Currently, starts DNS probes using the |
| // DnsProbeService whenever a page fails to load with a DNS-related error. |
| class NetErrorTabHelper |
| : public content::WebContentsObserver, |
| public content::WebContentsUserData<NetErrorTabHelper> { |
| public: |
| enum TestingState { |
| TESTING_DEFAULT, |
| TESTING_FORCE_DISABLED, |
| TESTING_FORCE_ENABLED |
| }; |
| |
| typedef base::Callback<void(chrome_common_net::DnsProbeStatus)> |
| DnsProbeStatusSnoopCallback; |
| |
| ~NetErrorTabHelper() override; |
| |
| static void set_state_for_testing(TestingState testing_state); |
| |
| // Sets a callback that will be called immediately after the helper sends |
| // a NetErrorHelper IPC. (Used by the DNS probe browser test to know when to |
| // check the error page for updates, instead of polling.) |
| void set_dns_probe_status_snoop_callback_for_testing( |
| const DnsProbeStatusSnoopCallback& dns_probe_status_snoop_callback) { |
| dns_probe_status_snoop_callback_ = dns_probe_status_snoop_callback; |
| } |
| |
| // content::WebContentsObserver implementation. |
| void DidStartNavigationToPendingEntry( |
| const GURL& url, |
| content::NavigationController::ReloadType reload_type) override; |
| |
| void DidStartProvisionalLoadForFrame( |
| content::RenderFrameHost* render_frame_host, |
| const GURL& validated_url, |
| bool is_error_page, |
| bool is_iframe_srcdoc) override; |
| |
| void DidCommitProvisionalLoadForFrame( |
| content::RenderFrameHost* render_frame_host, |
| const GURL& url, |
| ui::PageTransition transition_type) override; |
| |
| void DidFailProvisionalLoad(content::RenderFrameHost* render_frame_host, |
| const GURL& validated_url, |
| int error_code, |
| const base::string16& error_description) override; |
| |
| protected: |
| // |contents| is the WebContents of the tab this NetErrorTabHelper is |
| // attached to. |
| explicit NetErrorTabHelper(content::WebContents* contents); |
| virtual void StartDnsProbe(); |
| virtual void SendInfo(); |
| void OnDnsProbeFinished(chrome_common_net::DnsProbeStatus result); |
| |
| chrome_common_net::DnsProbeStatus dns_probe_status() const { |
| return dns_probe_status_; |
| } |
| |
| private: |
| friend class content::WebContentsUserData<NetErrorTabHelper>; |
| |
| void OnMainFrameDnsError(); |
| |
| void InitializePref(content::WebContents* contents); |
| bool ProbesAllowed() const; |
| |
| // True if the last provisional load that started was for an error page. |
| bool is_error_page_; |
| |
| // True if the helper has seen a main frame page load fail with a DNS error, |
| // but has not yet seen a new page commit successfully afterwards. |
| bool dns_error_active_; |
| |
| // True if the helper has seen an error page commit while |dns_error_active_| |
| // is true. (This should never be true if |dns_error_active_| is false.) |
| bool dns_error_page_committed_; |
| |
| // The status of a DNS probe that may or may not have started or finished. |
| // Since the renderer can change out from under the helper (in cross-process |
| // navigations), it re-sends the status whenever an error page commits. |
| chrome_common_net::DnsProbeStatus dns_probe_status_; |
| |
| // Optional callback for browser test to snoop on outgoing NetErrorInfo IPCs. |
| DnsProbeStatusSnoopCallback dns_probe_status_snoop_callback_; |
| |
| // "Use a web service to resolve navigation errors" preference is required |
| // to allow probes. |
| BooleanPrefMember resolve_errors_with_web_service_; |
| |
| base::WeakPtrFactory<NetErrorTabHelper> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NetErrorTabHelper); |
| }; |
| |
| } // namespace chrome_browser_net |
| |
| #endif // CHROME_BROWSER_NET_NET_ERROR_TAB_HELPER_H_ |