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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.
#ifndef CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
#define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "base/callback_forward.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/values.h"
#include "content/public/browser/certificate_request_result_type.h"
#include "content/public/common/content_client.h"
#include "content/public/common/media_stream_request.h"
#include "content/public/common/resource_type.h"
#include "content/public/common/socket_permission_request.h"
#include "content/public/common/window_container_type.h"
#include "net/base/mime_util.h"
#include "net/cookies/canonical_cookie.h"
#include "net/url_request/url_request_interceptor.h"
#include "net/url_request/url_request_job_factory.h"
#include "storage/browser/fileapi/file_system_context.h"
#include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
#include "ui/base/window_open_disposition.h"
#if defined(OS_POSIX) && !defined(OS_MACOSX)
#include "base/posix/global_descriptors.h"
#endif
#if defined(OS_POSIX)
#include "content/public/browser/file_descriptor_info.h"
#endif
class GURL;
namespace base {
class CommandLine;
class DictionaryValue;
class FilePath;
}
namespace blink {
struct WebWindowFeatures;
}
namespace gfx {
class ImageSkia;
}
namespace net {
class CookieOptions;
class NetLog;
class SSLCertRequestInfo;
class SSLInfo;
class URLRequest;
class URLRequestContext;
class URLRequestContextGetter;
class X509Certificate;
}
namespace sandbox {
class TargetPolicy;
}
namespace ui {
class SelectFilePolicy;
}
namespace storage {
class ExternalMountPoints;
class FileSystemBackend;
}
namespace content {
enum class PermissionType;
class AccessTokenStore;
class BrowserChildProcessHost;
class BrowserContext;
class BrowserMainParts;
class BrowserPluginGuestDelegate;
class BrowserPpapiHost;
class BrowserURLHandler;
class ClientCertificateDelegate;
class DevToolsManagerDelegate;
class ExternalVideoSurfaceContainer;
class LocationProvider;
class MediaObserver;
class NavigatorConnectContext;
class NavigatorConnectServiceFactory;
class PlatformNotificationService;
class PresentationServiceDelegate;
class QuotaPermissionContext;
class RenderFrameHost;
class RenderProcessHost;
class RenderViewHost;
class ResourceContext;
class ServiceRegistry;
class SiteInstance;
class SpeechRecognitionManagerDelegate;
class TracingDelegate;
class WebContents;
class WebContentsViewDelegate;
struct MainFunctionParams;
struct OpenURLParams;
struct Referrer;
struct WebPreferences;
// A mapping from the scheme name to the protocol handler that services its
// content.
typedef std::map<
std::string, linked_ptr<net::URLRequestJobFactory::ProtocolHandler> >
ProtocolHandlerMap;
// A scoped vector of protocol interceptors.
typedef ScopedVector<net::URLRequestInterceptor>
URLRequestInterceptorScopedVector;
// Embedder API (or SPI) for participating in browser logic, to be implemented
// by the client of the content browser. See ChromeContentBrowserClient for the
// principal implementation. The methods are assumed to be called on the UI
// thread unless otherwise specified. Use this "escape hatch" sparingly, to
// avoid the embedder interface ballooning and becoming very specific to Chrome.
// (Often, the call out to the client can happen in a different part of the code
// that either already has a hook out to the embedder, or calls out to one of
// the observer interfaces.)
class CONTENT_EXPORT ContentBrowserClient {
public:
virtual ~ContentBrowserClient() {}
// Allows the embedder to set any number of custom BrowserMainParts
// implementations for the browser startup code. See comments in
// browser_main_parts.h.
virtual BrowserMainParts* CreateBrowserMainParts(
const MainFunctionParams& parameters);
// Allows the embedder to change the default behavior of
// BrowserThread::PostAfterStartupTask to better match whatever
// definition of "startup" the embedder has in mind. This may be
// called on any thread.
// Note: see related BrowserThread::PostAfterStartupTask.
virtual void PostAfterStartupTask(
const tracked_objects::Location& from_here,
const scoped_refptr<base::TaskRunner>& task_runner,
const base::Closure& task);
// If content creates the WebContentsView implementation, it will ask the
// embedder to return an (optional) delegate to customize it. The view will
// own the delegate.
virtual WebContentsViewDelegate* GetWebContentsViewDelegate(
WebContents* web_contents);
// Notifies that a render process will be created. This is called before
// the content layer adds its own BrowserMessageFilters, so that the
// embedder's IPC filters have priority.
virtual void RenderProcessWillLaunch(RenderProcessHost* host) {}
// Notifies that a BrowserChildProcessHost has been created.
virtual void BrowserChildProcessHostCreated(BrowserChildProcessHost* host) {}
// Get the effective URL for the given actual URL, to allow an embedder to
// group different url schemes in the same SiteInstance.
virtual GURL GetEffectiveURL(BrowserContext* browser_context,
const GURL& url);
// Returns whether all instances of the specified effective URL should be
// rendered by the same process, rather than using process-per-site-instance.
virtual bool ShouldUseProcessPerSite(BrowserContext* browser_context,
const GURL& effective_url);
// Returns a list additional WebUI schemes, if any. These additional schemes
// act as aliases to the chrome: scheme. The additional schemes may or may
// not serve specific WebUI pages depending on the particular URLDataSource
// and its override of URLDataSource::ShouldServiceRequest. For all schemes
// returned here, view-source is allowed.
virtual void GetAdditionalWebUISchemes(
std::vector<std::string>* additional_schemes) {}
// Returns a list of webUI hosts to ignore the storage partition check in
// URLRequestChromeJob::CheckStoragePartitionMatches.
virtual void GetAdditionalWebUIHostsToIgnoreParititionCheck(
std::vector<std::string>* hosts) {}
// Creates the main net::URLRequestContextGetter. Should only be called once
// per ContentBrowserClient object.
// TODO(ajwong): Remove once http://crbug.com/159193 is resolved.
virtual net::URLRequestContextGetter* CreateRequestContext(
BrowserContext* browser_context,
ProtocolHandlerMap* protocol_handlers,
URLRequestInterceptorScopedVector request_interceptors);
// Creates the net::URLRequestContextGetter for a StoragePartition. Should
// only be called once per partition_path per ContentBrowserClient object.
// TODO(ajwong): Remove once http://crbug.com/159193 is resolved.
virtual net::URLRequestContextGetter* CreateRequestContextForStoragePartition(
BrowserContext* browser_context,
const base::FilePath& partition_path,
bool in_memory,
ProtocolHandlerMap* protocol_handlers,
URLRequestInterceptorScopedVector request_interceptors);
// Returns whether a specified URL is handled by the embedder's internal
// protocol handlers.
virtual bool IsHandledURL(const GURL& url);
// Returns whether the given process is allowed to commit |url|. This is a
// more conservative check than IsSuitableHost, since it is used after a
// navigation has committed to ensure that the process did not exceed its
// authority.
virtual bool CanCommitURL(RenderProcessHost* process_host, const GURL& url);
// Returns whether a URL should be allowed to open from a specific context.
// This also applies in cases where the new URL will open in another process.
virtual bool ShouldAllowOpenURL(SiteInstance* site_instance, const GURL& url);
// Returns whether a new view for a given |site_url| can be launched in a
// given |process_host|.
virtual bool IsSuitableHost(RenderProcessHost* process_host,
const GURL& site_url);
// Returns whether a new view for a new site instance can be added to a
// given |process_host|.
virtual bool MayReuseHost(RenderProcessHost* process_host);
// Returns whether a new process should be created or an existing one should
// be reused based on the URL we want to load. This should return false,
// unless there is a good reason otherwise.
virtual bool ShouldTryToUseExistingProcessHost(
BrowserContext* browser_context, const GURL& url);
// Called when a site instance is first associated with a process.
virtual void SiteInstanceGotProcess(SiteInstance* site_instance) {}
// Called from a site instance's destructor.
virtual void SiteInstanceDeleting(SiteInstance* site_instance) {}
// Returns true if for the navigation from |current_url| to |new_url|
// in |site_instance|, a new SiteInstance and BrowsingInstance should be
// created (even if we are in a process model that doesn't usually swap.)
// This forces a process swap and severs script connections with existing
// tabs.
virtual bool ShouldSwapBrowsingInstancesForNavigation(
SiteInstance* site_instance,
const GURL& current_url,
const GURL& new_url);
// Returns true if the given navigation redirect should cause a renderer
// process swap.
// This is called on the IO thread.
virtual bool ShouldSwapProcessesForRedirect(ResourceContext* resource_context,
const GURL& current_url,
const GURL& new_url);
// Returns true if the passed in URL should be assigned as the site of the
// current SiteInstance, if it does not yet have a site.
virtual bool ShouldAssignSiteForURL(const GURL& url);
// See CharacterEncoding's comment.
virtual std::string GetCanonicalEncodingNameByAliasName(
const std::string& alias_name);
// Allows the embedder to pass extra command line flags.
// switches::kProcessType will already be set at this point.
virtual void AppendExtraCommandLineSwitches(base::CommandLine* command_line,
int child_process_id) {}
// Returns the locale used by the application.
// This is called on the UI and IO threads.
virtual std::string GetApplicationLocale();
// Returns the languages used in the Accept-Languages HTTP header.
// (Not called GetAcceptLanguages so it doesn't clash with win32).
virtual std::string GetAcceptLangs(BrowserContext* context);
// Returns the default favicon. The callee doesn't own the given bitmap.
virtual const gfx::ImageSkia* GetDefaultFavicon();
// Allow the embedder to control if an AppCache can be used for the given url.
// This is called on the IO thread.
virtual bool AllowAppCache(const GURL& manifest_url,
const GURL& first_party,
ResourceContext* context);
// Allow the embedder to control if a Service Worker can be associated
// with the given scope.
// This is called on the IO thread.
virtual bool AllowServiceWorker(const GURL& scope,
const GURL& first_party,
content::ResourceContext* context,
int render_process_id,
int render_frame_id);
// Allow the embedder to control if the given cookie can be read.
// This is called on the IO thread.
virtual bool AllowGetCookie(const GURL& url,
const GURL& first_party,
const net::CookieList& cookie_list,
ResourceContext* context,
int render_process_id,
int render_frame_id);
// Allow the embedder to control if the given cookie can be set.
// This is called on the IO thread.
virtual bool AllowSetCookie(const GURL& url,
const GURL& first_party,
const std::string& cookie_line,
ResourceContext* context,
int render_process_id,
int render_frame_id,
net::CookieOptions* options);
// This is called on the IO thread.
virtual bool AllowSaveLocalState(ResourceContext* context);
// Allow the embedder to control if access to web database by a shared worker
// is allowed. |render_frame| is a vector of pairs of
// RenderProcessID/RenderFrameID of RenderFrame that are using this worker.
// This is called on the IO thread.
virtual bool AllowWorkerDatabase(
const GURL& url,
const base::string16& name,
const base::string16& display_name,
unsigned long estimated_size,
ResourceContext* context,
const std::vector<std::pair<int, int> >& render_frames);
// Allow the embedder to control if access to file system by a shared worker
// is allowed.
// This is called on the IO thread.
virtual void AllowWorkerFileSystem(
const GURL& url,
ResourceContext* context,
const std::vector<std::pair<int, int> >& render_frames,
base::Callback<void(bool)> callback);
// Allow the embedder to control if access to IndexedDB by a shared worker
// is allowed.
// This is called on the IO thread.
virtual bool AllowWorkerIndexedDB(
const GURL& url,
const base::string16& name,
ResourceContext* context,
const std::vector<std::pair<int, int> >& render_frames);
// Allow the embedder to override the request context based on the URL for
// certain operations, like cookie access. Returns nullptr to indicate the
// regular request context should be used.
// This is called on the IO thread.
virtual net::URLRequestContext* OverrideRequestContextForURL(
const GURL& url, ResourceContext* context);
// Allow the embedder to specify a string version of the storage partition
// config with a site.
virtual std::string GetStoragePartitionIdForSite(
BrowserContext* browser_context,
const GURL& site);
// Allows the embedder to provide a validation check for |partition_id|s.
// This domain of valid entries should match the range of outputs for
// GetStoragePartitionIdForChildProcess().
virtual bool IsValidStoragePartitionId(BrowserContext* browser_context,
const std::string& partition_id);
// Allows the embedder to provide a storage parititon configuration for a
// site. A storage partition configuration includes a domain of the embedder's
// choice, an optional name within that domain, and whether the partition is
// in-memory only.
//
// If |can_be_default| is false, the caller is telling the embedder that the
// |site| is known to not be in the default partition. This is useful in
// some shutdown situations where the bookkeeping logic that maps sites to
// their partition configuration are no longer valid.
//
// The |partition_domain| is [a-z]* UTF-8 string, specifying the domain in
// which partitions live (similar to namespace). Within a domain, partitions
// can be uniquely identified by the combination of |partition_name| and
// |in_memory| values. When a partition is not to be persisted, the
// |in_memory| value must be set to true.
virtual void GetStoragePartitionConfigForSite(
BrowserContext* browser_context,
const GURL& site,
bool can_be_default,
std::string* partition_domain,
std::string* partition_name,
bool* in_memory);
// Create and return a new quota permission context.
virtual QuotaPermissionContext* CreateQuotaPermissionContext();
// Informs the embedder that a certificate error has occured. If
// |overridable| is true and if |strict_enforcement| is false, the user
// can ignore the error and continue. The embedder can call the callback
// asynchronously. If |result| is not set to
// CERTIFICATE_REQUEST_RESULT_TYPE_CONTINUE, the request will be cancelled
// or denied immediately, and the callback won't be run.
virtual void AllowCertificateError(int render_process_id,
int render_frame_id,
int cert_error,
const net::SSLInfo& ssl_info,
const GURL& request_url,
ResourceType resource_type,
bool overridable,
bool strict_enforcement,
bool expired_previous_decision,
const base::Callback<void(bool)>& callback,
CertificateRequestResultType* result) {}
// Selects a SSL client certificate and returns it to the |delegate|. Note:
// |delegate| may be called synchronously or asynchronously.
//
// TODO(davidben): Move this hook to WebContentsDelegate.
virtual void SelectClientCertificate(
WebContents* web_contents,
net::SSLCertRequestInfo* cert_request_info,
scoped_ptr<ClientCertificateDelegate> delegate);
// Adds a new installable certificate or private key.
// Typically used to install an X.509 user certificate.
// Note that it's up to the embedder to verify that the data is
// well-formed. |cert_data| will be nullptr if |cert_size| is 0.
virtual void AddCertificate(net::CertificateMimeType cert_type,
const void* cert_data,
size_t cert_size,
int render_process_id,
int render_frame_id) {}
// Returns a class to get notifications about media event. The embedder can
// return nullptr if they're not interested.
virtual MediaObserver* GetMediaObserver();
// Returns the platform notification service, capable of displaying Web
// Notifications to the user. The embedder can return a nullptr if they don't
// support this functionality. May be called from any thread.
virtual PlatformNotificationService* GetPlatformNotificationService();
// Returns true if the given page is allowed to open a window of the given
// type. If true is returned, |no_javascript_access| will indicate whether
// the window that is created should be scriptable/in the same process.
// This is called on the IO thread.
virtual bool CanCreateWindow(const GURL& opener_url,
const GURL& opener_top_level_frame_url,
const GURL& source_origin,
WindowContainerType container_type,
const GURL& target_url,
const Referrer& referrer,
WindowOpenDisposition disposition,
const blink::WebWindowFeatures& features,
bool user_gesture,
bool opener_suppressed,
ResourceContext* context,
int render_process_id,
int opener_id,
bool* no_javascript_access);
// Notifies the embedder that the ResourceDispatcherHost has been created.
// This is when it can optionally add a delegate.
virtual void ResourceDispatcherHostCreated() {}
// Allows the embedder to return a delegate for the SpeechRecognitionManager.
// The delegate will be owned by the manager. It's valid to return nullptr.
virtual SpeechRecognitionManagerDelegate*
CreateSpeechRecognitionManagerDelegate();
// Getters for common objects.
virtual net::NetLog* GetNetLog();
// Creates a new AccessTokenStore for gelocation.
virtual AccessTokenStore* CreateAccessTokenStore();
// Returns true if fast shutdown is possible.
virtual bool IsFastShutdownPossible();
// Called by WebContents to override the WebKit preferences that are used by
// the renderer. The content layer will add its own settings, and then it's up
// to the embedder to update it if it wants.
virtual void OverrideWebkitPrefs(RenderViewHost* render_view_host,
WebPreferences* prefs) {}
// Notifies that BrowserURLHandler has been created, so that the embedder can
// optionally add their own handlers.
virtual void BrowserURLHandlerCreated(BrowserURLHandler* handler) {}
// Clears browser cache.
virtual void ClearCache(RenderFrameHost* rfh) {}
// Clears browser cookies.
virtual void ClearCookies(RenderFrameHost* rfh) {}
// Returns the default download directory.
// This can be called on any thread.
virtual base::FilePath GetDefaultDownloadDirectory();
// Returns the default filename used in downloads when we have no idea what
// else we should do with the file.
virtual std::string GetDefaultDownloadName();
// Notification that a pepper plugin has just been spawned. This allows the
// embedder to add filters onto the host to implement interfaces.
// This is called on the IO thread.
virtual void DidCreatePpapiPlugin(BrowserPpapiHost* browser_host) {}
// Gets the host for an external out-of-process plugin.
virtual BrowserPpapiHost* GetExternalBrowserPpapiHost(
int plugin_child_id);
// Returns true if the socket operation specified by |params| is allowed from
// the given |browser_context| and |url|. If |params| is nullptr, this method
// checks the basic "socket" permission, which is for those operations that
// don't require a specific socket permission rule.
// |private_api| indicates whether this permission check is for the private
// Pepper socket API or the public one.
virtual bool AllowPepperSocketAPI(BrowserContext* browser_context,
const GURL& url,
bool private_api,
const SocketPermissionRequest* params);
// Returns an implementation of a file selecition policy. Can return nullptr.
virtual ui::SelectFilePolicy* CreateSelectFilePolicy(
WebContents* web_contents);
// Returns additional allowed scheme set which can access files in
// FileSystem API.
virtual void GetAdditionalAllowedSchemesForFileSystem(
std::vector<std::string>* additional_schemes) {}
// Returns auto mount handlers for URL requests for FileSystem APIs.
virtual void GetURLRequestAutoMountHandlers(
std::vector<storage::URLRequestAutoMountHandler>* handlers) {}
// Returns additional file system backends for FileSystem API.
// |browser_context| is needed in the additional FileSystemBackends.
// It has mount points to create objects returned by additional
// FileSystemBackends, and SpecialStoragePolicy for permission granting.
virtual void GetAdditionalFileSystemBackends(
BrowserContext* browser_context,
const base::FilePath& storage_partition_path,
ScopedVector<storage::FileSystemBackend>* additional_backends) {}
// Allows an embedder to return its own LocationProvider implementation.
// Return nullptr to use the default one for the platform to be created.
// FYI: Used by an external project; please don't remove.
// Contact Viatcheslav Ostapenko at sl.ostapenko@samsung.com for more
// information.
virtual LocationProvider* OverrideSystemLocationProvider();
// Creates a new DevToolsManagerDelegate. The caller owns the returned value.
// It's valid to return nullptr.
virtual DevToolsManagerDelegate* GetDevToolsManagerDelegate();
// Creates a new TracingDelegate. The caller owns the returned value.
// It's valid to return nullptr.
virtual TracingDelegate* GetTracingDelegate();
// Returns true if plugin referred to by the url can use
// pp::FileIO::RequestOSFileHandle.
virtual bool IsPluginAllowedToCallRequestOSFileHandle(
BrowserContext* browser_context,
const GURL& url);
// Returns true if dev channel APIs are available for plugins.
virtual bool IsPluginAllowedToUseDevChannelAPIs(
BrowserContext* browser_context,
const GURL& url);
// Allows to override browser Mojo services exposed through the
// RenderProcessHost.
virtual void OverrideRenderProcessMojoServices(ServiceRegistry* registry) {}
// Allows to override browser Mojo services exposed through the
// RenderFrameHost.
virtual void OverrideRenderFrameMojoServices(
ServiceRegistry* registry,
RenderFrameHost* render_frame_host) {}
// Registers additional navigator.connect service factories available in a
// particular NavigatorConnectContext.
virtual void GetAdditionalNavigatorConnectServices(
const scoped_refptr<NavigatorConnectContext>& context) {}
// Allows to override the visibility state of a RenderFrameHost.
// |visibility_state| should not be null. It will only be set if needed.
virtual void OverridePageVisibilityState(
RenderFrameHost* render_frame_host,
blink::WebPageVisibilityState* visibility_state) {}
// Allows an embedder to provide its own PresentationServiceDelegate
// implementation. Returns nullptr if unavailable.
virtual PresentationServiceDelegate* GetPresentationServiceDelegate(
WebContents* web_contents);
// Allows programmatic opening of a new tab/window without going through
// another WebContents. For example, from a Worker. |callback| will be
// invoked with the appropriate WebContents* when available.
virtual void OpenURL(BrowserContext* browser_context,
const OpenURLParams& params,
const base::Callback<void(WebContents*)>& callback);
// Allows the embedder to record |metric| for a specific |url|.
virtual void RecordURLMetric(const std::string& metric, const GURL& url) {}
#if defined(OS_POSIX) && !defined(OS_MACOSX)
// Populates |mappings| with all files that need to be mapped before launching
// a child process.
virtual void GetAdditionalMappedFilesForChildProcess(
const base::CommandLine& command_line,
int child_process_id,
FileDescriptorInfo* mappings) {}
#endif
#if defined(OS_WIN)
// Returns the name of the dll that contains cursors and other resources.
virtual const wchar_t* GetResourceDllName();
// This is called on the PROCESS_LAUNCHER thread before the renderer process
// is launched. It gives the embedder a chance to add loosen the sandbox
// policy.
virtual void PreSpawnRenderer(sandbox::TargetPolicy* policy,
bool* success) {}
#endif
#if defined(VIDEO_HOLE)
// Allows an embedder to provide its own ExternalVideoSurfaceContainer
// implementation. Return nullptr to disable external surface video.
virtual ExternalVideoSurfaceContainer*
OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
#endif
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_