WebKitWebContext: WPE Reference Manual

## WebKitWebContext WebKitWebContext — Manages aspects common to all WebKitWebViews |

## Functions

WebKitWebContext * | webkit_web_context_get_default ()
WebKitWebContext * | webkit_web_context_new ()
WebKitWebContext * | webkit_web_context_new_ephemeral ()
WebKitWebContext * | webkit_web_context_new_with_website_data_manager ()
gboolean | webkit_web_context_is_ephemeral ()
gboolean | webkit_web_context_is_automation_allowed ()
void | webkit_web_context_set_automation_allowed ()
WebKitWebsiteDataManager * | webkit_web_context_get_website_data_manager ()
WebKitCacheModel | webkit_web_context_get_cache_model ()
void | webkit_web_context_set_cache_model ()
guint | webkit_web_context_get_web_process_count_limit ()
void | webkit_web_context_set_web_process_count_limit ()
void | webkit_web_context_clear_cache ()
void | webkit_web_context_set_network_proxy_settings ()
WebKitDownload * | webkit_web_context_download_uri ()
WebKitCookieManager * | webkit_web_context_get_cookie_manager ()
WebKitGeolocationManager * | webkit_web_context_get_geolocation_manager ()
WebKitFaviconDatabase * | webkit_web_context_get_favicon_database ()
void | webkit_web_context_set_favicon_database_directory ()
const gchar * | webkit_web_context_get_favicon_database_directory ()
WebKitSecurityManager * | webkit_web_context_get_security_manager ()
void | webkit_web_context_set_additional_plugins_directory ()
void | webkit_web_context_get_plugins ()
GList * | webkit_web_context_get_plugins_finish ()
gboolean | webkit_web_context_get_sandbox_enabled ()
void | webkit_web_context_set_sandbox_enabled ()
void | webkit_web_context_add_path_to_sandbox ()
gboolean | webkit_web_context_get_spell_checking_enabled ()
void | webkit_web_context_set_spell_checking_enabled ()
const gchar * const * | webkit_web_context_get_spell_checking_languages ()
void | webkit_web_context_set_spell_checking_languages ()
void | webkit_web_context_set_preferred_languages ()
void | webkit_web_context_set_tls_errors_policy ()
WebKitTLSErrorsPolicy | webkit_web_context_get_tls_errors_policy ()
void | webkit_web_context_set_web_extensions_directory ()
void | webkit_web_context_set_web_extensions_initialization_user_data ()
void | webkit_web_context_prefetch_dns ()
void | webkit_web_context_allow_tls_certificate_for_host ()
WebKitProcessModel | webkit_web_context_get_process_model ()
void | webkit_web_context_set_process_model ()
void | webkit_web_context_initialize_notification_permissions ()
void | webkit_web_context_send_message_to_all_extensions ()
void | (*WebKitURISchemeRequestCallback) ()
void | webkit_web_context_register_uri_scheme ()

## Properties

WebKitMemoryPressureSettings * | memory-pressure-settings | Write / Construct Only
WebKitWebsiteDataManager * | website-data-manager | Read / Write / Construct Only

## Signals

void | automation-started | Run Last
void | download-started | Run Last
void | initialize-notification-permissions | Run Last
void | initialize-web-extensions | Run Last
gboolean | user-message-received | Run Last

## Types and Values

struct | WebKitWebContext
enum | WebKitCacheModel
enum | WebKitProcessModel

## Object Hierarchy

        GObject
        ╰── WebKitWebContext

## Description

The WebKitWebContext manages all aspects common to all WebKitWebViews.

You can define the WebKitCacheModel and WebKitProcessModel with `webkit_web_context_set_cache_model()` and `webkit_web_context_set_process_model()`, depending on the needs of your application. You can access the WebKitSecurityManager to specify the behaviour of your application regarding security using `webkit_web_context_get_security_manager()`.

It is also possible to change your preferred language or enable spell checking, using `webkit_web_context_set_preferred_languages()`, `webkit_web_context_set_spell_checking_languages()` and `webkit_web_context_set_spell_checking_enabled()`.

You can use `webkit_web_context_register_uri_scheme()` to register custom URI schemes, and manage several other settings.

TLS certificate validation failure is now treated as a transport error by default. To handle TLS failures differently, you can connect to “load-failed-with-tls-errors”. Alternatively, you can use `webkit_web_context_set_tls_errors_policy()` to set the policy `WEBKIT_TLS_ERRORS_POLICY_IGNORE`; however, this is not appropriate for Internet applications.

## Functions

### webkit_web_context_get_default ()

    WebKitWebContext *
    webkit_web_context_get_default (void);

Gets the default web context

#### Returns

a WebKitWebContext.

[transfer none]

### webkit_web_context_new ()

    WebKitWebContext *
    webkit_web_context_new (void);

Create a new WebKitWebContext

#### Returns

a newly created WebKitWebContext.

[transfer full]

Since: 2.8

### webkit_web_context_new_ephemeral ()

    WebKitWebContext *
    webkit_web_context_new_ephemeral (void);

Create a new ephemeral WebKitWebContext. An ephemeral WebKitWebContext is a context created with an ephemeral WebKitWebsiteDataManager. This is just a convenient method to create ephemeral contexts without having to create your own WebKitWebsiteDataManager. All WebKitWebViews associated with this context will also be ephemeral. Websites will not store any data in the client storage. This is normally used to implement private instances.

#### Returns

a new ephemeral WebKitWebContext.

[transfer full]

Since: 2.16

### webkit_web_context_new_with_website_data_manager ()

    WebKitWebContext *
    webkit_web_context_new_with_website_data_manager
                                   (WebKitWebsiteDataManager *manager);

Create a new WebKitWebContext with a WebKitWebsiteDataManager.

#### Parameters

manager | a WebKitWebsiteDataManager |

#### Returns

a newly created WebKitWebContext.

[transfer full]

Since: 2.10

### webkit_web_context_is_ephemeral ()

    gboolean
    webkit_web_context_is_ephemeral (WebKitWebContext *context);

Get whether a WebKitWebContext is ephemeral.

#### Parameters

context | the WebKitWebContext |

#### Returns

`TRUE` if `context` is ephemeral or `FALSE` otherwise.

Since: 2.16

### webkit_web_context_is_automation_allowed ()

    gboolean
    webkit_web_context_is_automation_allowed
                                   (WebKitWebContext *context);

Get whether automation is allowed in `context` . See also `webkit_web_context_set_automation_allowed()`.

#### Parameters

context | the WebKitWebContext |

#### Returns

`TRUE` if automation is allowed or `FALSE` otherwise.

Since: 2.18

### webkit_web_context_set_automation_allowed ()

    void
    webkit_web_context_set_automation_allowed
                                   (WebKitWebContext *context,
                                    gboolean allowed);

Set whether automation is allowed in `context` . When automation is enabled the browser could be controlled by another process by requesting an automation session. When a new automation session is requested the signal “automation-started” is emitted. Automation is disabled by default, so you need to explicitly call this method passing `TRUE` to enable it.

Note that only one WebKitWebContext can have automation enabled, so this will do nothing if there's another WebKitWebContext with automation already enabled.

#### Parameters

context | the WebKitWebContext |
allowed | value to set |

Since: 2.18

### webkit_web_context_get_website_data_manager ()

    WebKitWebsiteDataManager *
    webkit_web_context_get_website_data_manager
                                   (WebKitWebContext *context);

Get the WebKitWebsiteDataManager of `context` .

#### Parameters

context | the WebKitWebContext |

#### Returns

a WebKitWebsiteDataManager.

[transfer none]

Since: 2.10

### webkit_web_context_get_cache_model ()

    WebKitCacheModel
    webkit_web_context_get_cache_model (WebKitWebContext *context);

Returns the current cache model. For more information about this value check the documentation of the function `webkit_web_context_set_cache_model()`.

#### Parameters

context | the WebKitWebContext |

#### Returns

the current WebKitCacheModel

### webkit_web_context_set_cache_model ()

    void
    webkit_web_context_set_cache_model (WebKitWebContext *context,
                                        WebKitCacheModel cache_model);

Specifies a usage model for WebViews, which WebKit will use to determine its caching behavior. All web views follow the cache model. This cache model determines the RAM and disk space to use for caching previously viewed content .

Research indicates that users tend to browse within clusters of documents that hold resources in common, and to revisit previously visited documents. WebKit and the frameworks below it include built-in caches that take advantage of these patterns, substantially improving document load speed in browsing situations. The WebKit cache model controls the behaviors of all of these caches, including various WebCore caches.

Browsers can improve document load speed substantially by specifying `WEBKIT_CACHE_MODEL_WEB_BROWSER`. Applications without a browsing interface can reduce memory usage substantially by specifying `WEBKIT_CACHE_MODEL_DOCUMENT_VIEWER`. The default value is `WEBKIT_CACHE_MODEL_WEB_BROWSER`.

#### Parameters

context | the WebKitWebContext |
cache_model | a WebKitCacheModel |

### webkit_web_context_get_web_process_count_limit ()

    guint
    webkit_web_context_get_web_process_count_limit
                                   (WebKitWebContext *context);

`webkit_web_context_get_web_process_count_limit` has been deprecated since version 2.26 and should not be used in newly-written code.

Gets the maximum number of web processes that can be created at the same time for the `context` .

This function is now deprecated and always returns 0 (no limit). See also `webkit_web_context_set_web_process_count_limit()`.

#### Parameters

context | the WebKitWebContext |

#### Returns

the maximum limit of web processes, or 0 if there isn't a limit.

Since: 2.10

### webkit_web_context_set_web_process_count_limit ()

    void
    webkit_web_context_set_web_process_count_limit
                                   (WebKitWebContext *context,
                                    guint limit);

`webkit_web_context_set_web_process_count_limit` has been deprecated since version 2.26 and should not be used in newly-written code.

Sets the maximum number of web processes that can be created at the same time for the `context` . The default value is 0 and means no limit.

This function is now deprecated and does nothing for security reasons.

#### Parameters

context | the WebKitWebContext |
limit | the maximum number of web processes |

Since: 2.10

### webkit_web_context_clear_cache ()

    void
    webkit_web_context_clear_cache (WebKitWebContext *context);

Clears all resources currently cached. See also `webkit_web_context_set_cache_model()`.

#### Parameters

context | a WebKitWebContext |

### webkit_web_context_set_network_proxy_settings ()

    void
    webkit_web_context_set_network_proxy_settings
                                   (WebKitWebContext *context,
                                    WebKitNetworkProxyMode proxy_mode,
                                    WebKitNetworkProxySettings *proxy_settings);

`webkit_web_context_set_network_proxy_settings` has been deprecated since version 2.32. and should not be used in newly-written code.

Use `webkit_website_data_manager_set_network_proxy_settings()` instead.

Set the network proxy settings to be used by connections started in `context` . By default `WEBKIT_NETWORK_PROXY_MODE_DEFAULT` is used, which means that the system settings will be used (`g_proxy_resolver_get_default()`). If you want to override the system default settings, you can either use `WEBKIT_NETWORK_PROXY_MODE_NO_PROXY` to make sure no proxies are used at all, or `WEBKIT_NETWORK_PROXY_MODE_CUSTOM` to provide your own proxy settings. When `proxy_mode` is `WEBKIT_NETWORK_PROXY_MODE_CUSTOM` `proxy_settings` must be a valid WebKitNetworkProxySettings; otherwise, `proxy_settings` must be `NULL`.

#### Parameters

context | a WebKitWebContext |
proxy_mode | a WebKitNetworkProxyMode |
proxy_settings | a WebKitNetworkProxySettings, or `NULL`. | [allow-none]

Since: 2.16

### webkit_web_context_download_uri ()

    WebKitDownload *
    webkit_web_context_download_uri (WebKitWebContext *context,
                                     const gchar *uri);

Requests downloading of the specified URI string. The download operation will not be associated to any WebKitWebView, if you are interested in starting a download from a particular WebKitWebView use `webkit_web_view_download_uri()` instead.

#### Parameters

context | a WebKitWebContext |
uri | the URI to download |

#### Returns

a new WebKitDownload representing the download operation.

[transfer full]

### webkit_web_context_get_cookie_manager ()

    WebKitCookieManager *
    webkit_web_context_get_cookie_manager (WebKitWebContext *context);

Get the WebKitCookieManager of the `context` 's WebKitWebsiteDataManager.

#### Parameters

context | a WebKitWebContext |

#### Returns

the WebKitCookieManager of `context` .

[transfer none]

### webkit_web_context_get_geolocation_manager ()

    WebKitGeolocationManager *
    webkit_web_context_get_geolocation_manager
                                   (WebKitWebContext *context);

Get the WebKitGeolocationManager of `context` .

#### Parameters

context | a WebKitWebContext |

#### Returns

the WebKitGeolocationManager of `context` .

[transfer none]

Since: 2.26

### webkit_web_context_get_favicon_database ()

    WebKitFaviconDatabase *
    webkit_web_context_get_favicon_database
                                   (WebKitWebContext *context);

Get the WebKitFaviconDatabase associated with `context` .

To initialize the database you need to call `webkit_web_context_set_favicon_database_directory()`.

#### Parameters

context | a WebKitWebContext |

#### Returns

the WebKitFaviconDatabase of `context` .

[transfer none]

### webkit_web_context_set_favicon_database_directory ()

    void
    webkit_web_context_set_favicon_database_directory
                                   (WebKitWebContext *context,
                                    const gchar *path);

Set the directory path to be used to store the favicons database for `context` on disk. Passing `NULL` as `path` means using the default directory for the platform (see `g_get_user_cache_dir()`).

Calling this method also means enabling the favicons database for its use from the applications, so that's why it's expected to be called only once. Further calls for the same instance of WebKitWebContext won't cause any effect.

#### Parameters

context | a WebKitWebContext |
path | an absolute path to the icon database directory or `NULL` to use the defaults. | [allow-none]

### webkit_web_context_get_favicon_database_directory ()

    const gchar *
    webkit_web_context_get_favicon_database_directory
                                   (WebKitWebContext *context);

Get the directory path being used to store the favicons database for `context` , or `NULL` if `webkit_web_context_set_favicon_database_directory()` hasn't been called yet.

This function will always return the same path after having called `webkit_web_context_set_favicon_database_directory()` for the first time.

#### Parameters

context | a WebKitWebContext |

#### Returns

the path of the directory of the favicons database associated with `context` , or `NULL`.

[transfer none]

### webkit_web_context_get_security_manager ()

    WebKitSecurityManager *
    webkit_web_context_get_security_manager
                                   (WebKitWebContext *context);

Get the WebKitSecurityManager of `context` .

#### Parameters

context | a WebKitWebContext |

#### Returns

the WebKitSecurityManager of `context` .

[transfer none]

### webkit_web_context_set_additional_plugins_directory ()

    void
    webkit_web_context_set_additional_plugins_directory
                                   (WebKitWebContext *context,
                                    const gchar *directory);

`webkit_web_context_set_additional_plugins_directory` has been deprecated since version 2.32 and should not be used in newly-written code.

Set an additional directory where WebKit will look for plugins.

#### Parameters

context | a WebKitWebContext |
directory | the directory to add |

### webkit_web_context_get_plugins ()

    void
    webkit_web_context_get_plugins (WebKitWebContext *context,
                                    GCancellable *cancellable,
                                    GAsyncReadyCallback callback,
                                    gpointer user_data);

`webkit_web_context_get_plugins` has been deprecated since version 2.32 and should not be used in newly-written code.

Asynchronously get the list of installed plugins.

When the operation is finished, `callback` will be called. You can then call `webkit_web_context_get_plugins_finish()` to get the result of the operation.

#### Parameters

context | a WebKitWebContext |
cancellable | a GCancellable or `NULL` to ignore. | [allow-none]
callback | a GAsyncReadyCallback to call when the request is satisfied. | [scope async]
user_data | the data to pass to callback function. | [closure]

### webkit_web_context_get_plugins_finish ()

    GList *
    webkit_web_context_get_plugins_finish (WebKitWebContext *context,
                                           GAsyncResult *result,
                                           GError **error);

`webkit_web_context_get_plugins_finish` has been deprecated since version 2.32 and should not be used in newly-written code.

Finish an asynchronous operation started with webkit_web_context_get_plugins.

#### Parameters

context | a WebKitWebContext |
result | a GAsyncResult |
error | return location for error or `NULL` to ignore |

#### Returns

a GList of WebKitPlugin. You must free the GList with `g_list_free()` and unref the WebKitPlugins with `g_object_unref()` when you're done with them.

[element-type WebKitPlugin][transfer full]

### webkit_web_context_get_sandbox_enabled ()

    gboolean
    webkit_web_context_get_sandbox_enabled
                                   (WebKitWebContext *context);

Get whether sandboxing is currently enabled.

#### Parameters

context | a WebKitWebContext |

#### Returns

`TRUE` if sandboxing is enabled, or `FALSE` otherwise.

Since: 2.26

### webkit_web_context_set_sandbox_enabled ()

    void
    webkit_web_context_set_sandbox_enabled
                                   (WebKitWebContext *context,
                                    gboolean enabled);

Set whether WebKit subprocesses will be sandboxed, limiting access to the system.

This method **must be called before any web process has been created**, as early as possible in your application. Calling it later is a fatal error.

This is only implemented on Linux and is a no-op otherwise.

#### Parameters

context | a WebKitWebContext |
enabled | if `TRUE` enable sandboxing |

Since: 2.26

### webkit_web_context_add_path_to_sandbox ()

    void
    webkit_web_context_add_path_to_sandbox
                                   (WebKitWebContext *context,
                                    const char *path,
                                    gboolean read_only);

Adds a path to be mounted in the sandbox. `path` must exist before any web process has been created otherwise it will be silently ignored. It is a fatal error to add paths after a web process has been spawned.

Paths in directories such as `/sys`, `/proc`, and `/dev` or all of `/` are not valid.

See also `webkit_web_context_set_sandbox_enabled()`

#### Parameters

context | a WebKitWebContext |
path | an absolute path to mount in the sandbox. | [type filename]
read_only | if `TRUE` the path will be read-only |

Since: 2.26

### webkit_web_context_get_spell_checking_enabled ()

    gboolean
    webkit_web_context_get_spell_checking_enabled
                                   (WebKitWebContext *context);

Get whether spell checking feature is currently enabled.

#### Parameters

context | a WebKitWebContext |

#### Returns

`TRUE` If spell checking is enabled, or `FALSE` otherwise.

### webkit_web_context_set_spell_checking_enabled ()

    void
    webkit_web_context_set_spell_checking_enabled
                                   (WebKitWebContext *context,
                                    gboolean enabled);

Enable or disable the spell checking feature.

#### Parameters

context | a WebKitWebContext |
enabled | Value to be set |

### webkit_web_context_get_spell_checking_languages ()

    const gchar * const *
    webkit_web_context_get_spell_checking_languages
                                   (WebKitWebContext *context);

Get the the list of spell checking languages associated with `context` , or `NULL` if no languages have been previously set.

See `webkit_web_context_set_spell_checking_languages()` for more details on the format of the languages in the list.

#### Parameters

context | a WebKitWebContext |

#### Returns

A `NULL`-terminated array of languages if available, or `NULL` otherwise.

[array zero-terminated=1][element-type utf8][transfer none]

### webkit_web_context_set_spell_checking_languages ()

    void
    webkit_web_context_set_spell_checking_languages
                                   (WebKitWebContext *context,
                                    const gchar * const *languages);

Set the list of spell checking languages to be used for spell checking.

The locale string typically is in the form lang_COUNTRY, where lang is an ISO-639 language code, and COUNTRY is an ISO-3166 country code. For instance, sv_FI for Swedish as written in Finland or pt_BR for Portuguese as written in Brazil.

You need to call this function with a valid list of languages at least once in order to properly enable the spell checking feature in WebKit.

#### Parameters

context | a WebKitWebContext |
languages | a `NULL`-terminated list of spell checking languages. | [array zero-terminated=1][transfer none]

### webkit_web_context_set_preferred_languages ()

    void
    webkit_web_context_set_preferred_languages
                                   (WebKitWebContext *context,
                                    const gchar * const *languages);

Set the list of preferred languages, sorted from most desirable to least desirable. The list will be used to build the "Accept-Language" header that will be included in the network requests started by the WebKitWebContext.

#### Parameters

context | a WebKitWebContext |
languages | a `NULL`-terminated list of language identifiers. | [allow-none][array zero-terminated=1][element-type utf8][transfer none]

### webkit_web_context_set_tls_errors_policy ()

    void
    webkit_web_context_set_tls_errors_policy
                                   (WebKitWebContext *context,
                                    WebKitTLSErrorsPolicy policy);

`webkit_web_context_set_tls_errors_policy` has been deprecated since version 2.32. and should not be used in newly-written code.

Use `webkit_website_data_manager_set_tls_errors_policy()` instead.

Set the TLS errors policy of `context` as `policy`

#### Parameters

context | a WebKitWebContext |
policy | a WebKitTLSErrorsPolicy |

### webkit_web_context_get_tls_errors_policy ()

    WebKitTLSErrorsPolicy
    webkit_web_context_get_tls_errors_policy
                                   (WebKitWebContext *context);

`webkit_web_context_get_tls_errors_policy` has been deprecated since version 2.32. and should not be used in newly-written code.

Use `webkit_website_data_manager_get_tls_errors_policy()` instead.

Get the TLS errors policy of `context`

#### Parameters

context | a WebKitWebContext |

#### Returns

a WebKitTLSErrorsPolicy

### webkit_web_context_set_web_extensions_directory ()

    void
    webkit_web_context_set_web_extensions_directory
                                   (WebKitWebContext *context,
                                    const gchar *directory);

Set the directory where WebKit will look for Web Extensions. This method must be called before loading anything in this context, otherwise it will not have any effect. You can connect to “initialize-web-extensions” to call this method before anything is loaded.

#### Parameters

context | a WebKitWebContext |
directory | the directory to add |

### webkit_web_context_set_web_extensions_initialization_user_data ()

    void
    webkit_web_context_set_web_extensions_initialization_user_data
                                   (WebKitWebContext *context,
                                    GVariant *user_data);

Set user data to be passed to Web Extensions on initialization. The data will be passed to the WebKitWebExtensionInitializeWithUserDataFunction. This method must be called before loading anything in this context, otherwise it will not have any effect. You can connect to “initialize-web-extensions” to call this method before anything is loaded.

#### Parameters

context | a WebKitWebContext |
user_data | a GVariant |

Since: 2.4

### webkit_web_context_prefetch_dns ()

    void
    webkit_web_context_prefetch_dns (WebKitWebContext *context,
                                     const gchar *hostname);

Resolve the domain name of the given `hostname` in advance, so that if a URI of `hostname` is requested the load will be performed more quickly.

#### Parameters

context | a WebKitWebContext |
hostname | a hostname to be resolved |

### webkit_web_context_allow_tls_certificate_for_host ()

    void
    webkit_web_context_allow_tls_certificate_for_host
                                   (WebKitWebContext *context,
                                    GTlsCertificate *certificate,
                                    const gchar *host);

Ignore further TLS errors on the `host` for the certificate present in `info` .

#### Parameters

context | a WebKitWebContext |
certificate | a GTlsCertificate |
host | the host for which a certificate is to be allowed |

Since: 2.6

### webkit_web_context_get_process_model ()

    WebKitProcessModel
    webkit_web_context_get_process_model (WebKitWebContext *context);

Returns the current process model. For more information about this value see `webkit_web_context_set_process_model()`.

#### Parameters

context | the WebKitWebContext |

#### Returns

the current WebKitProcessModel

Since: 2.4

### webkit_web_context_set_process_model ()

    void
    webkit_web_context_set_process_model (WebKitWebContext *context,
                                          WebKitProcessModel process_model);

Specifies a process model for WebViews, which WebKit will use to determine how auxiliary processes are handled.

`WEBKIT_PROCESS_MODEL_MULTIPLE_SECONDARY_PROCESSES` will use one process per view most of the time, while still allowing for web views to share a process when needed (for example when different views interact with each other). Using this model, when a process hangs or crashes, only the WebViews using it stop working, while the rest of the WebViews in the application will still function normally.

`WEBKIT_PROCESS_MODEL_SHARED_SECONDARY_PROCESS` is deprecated since 2.26, using it has no effect for security reasons.

This method **must be called before any web process has been created**, as early as possible in your application. Calling it later will make your application crash.

#### Parameters

context | the WebKitWebContext |
process_model | a WebKitProcessModel |

Since: 2.4

### webkit_web_context_initialize_notification_permissions ()

    void
    webkit_web_context_initialize_notification_permissions
                                   (WebKitWebContext *context,
                                    GList *allowed_origins,
                                    GList *disallowed_origins);

Sets initial desktop notification permissions for the `context` . `allowed_origins` and `disallowed_origins` must each be GList of WebKitSecurityOrigin objects representing origins that will, respectively, either always or never have permission to show desktop notifications. No WebKitNotificationPermissionRequest will ever be generated for any of the security origins represented in `allowed_origins` or `disallowed_origins` . This function is necessary because some webpages proactively check whether they have permission to display notifications without ever creating a permission request.

This function only affects web processes that have not already been created. The best time to call it is when handling “initialize-notification-permissions” so as to ensure that new web processes receive the most recent set of permissions.

#### Parameters

context | the WebKitWebContext |
allowed_origins | a GList of security origins. | [element-type WebKitSecurityOrigin]
disallowed_origins | a GList of security origins. | [element-type WebKitSecurityOrigin]

Since: 2.16

### webkit_web_context_send_message_to_all_extensions ()

    void
    webkit_web_context_send_message_to_all_extensions
                                   (WebKitWebContext *context,
                                    WebKitUserMessage *message);

Send `message` to all WebKitWebExtensions associated to `context` . If `message` is floating, it's consumed.

#### Parameters

context | the WebKitWebContext |
message | a WebKitUserMessage |

Since: 2.28

### WebKitURISchemeRequestCallback ()

    void
    (*WebKitURISchemeRequestCallback) (WebKitURISchemeRequest *request,
                                       gpointer user_data);

Type definition for a function that will be called back when an URI request is made for a user registered URI scheme.

#### Parameters

request | the WebKitURISchemeRequest |
user_data | user data passed to the callback |

### webkit_web_context_register_uri_scheme ()

    void
    webkit_web_context_register_uri_scheme
                                   (WebKitWebContext *context,
                                    const gchar *scheme,
                                    WebKitURISchemeRequestCallback callback,
                                    gpointer user_data,
                                    GDestroyNotify user_data_destroy_func);

Register `scheme` in `context` , so that when an URI request with `scheme` is made in the WebKitWebContext, the WebKitURISchemeRequestCallback registered will be called with a WebKitURISchemeRequest. It is possible to handle URI scheme requests asynchronously, by calling `g_object_ref()` on the WebKitURISchemeRequest and calling `webkit_uri_scheme_request_finish()` later when the data of the request is available or `webkit_uri_scheme_request_finish_error()` in case of error.

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    static void
    about_uri_scheme_request_cb (WebKitURISchemeRequest *request,
                                 gpointer                user_data)
    {
        GInputStream *stream;
        gsize         stream_length;
        const gchar  *path;

        path = webkit_uri_scheme_request_get_path (request);
        if (!g_strcmp0 (path, "memory")) {
            /* Create a GInputStream with the contents of memory about page, and set its length to stream_length */
        } else if (!g_strcmp0 (path, "applications")) {
            /* Create a GInputStream with the contents of applications about page, and set its length to stream_length */
        } else if (!g_strcmp0 (path, "example")) {
            gchar *contents;

            contents = g_strdup_printf ("<html><body><p>Example about page</p></body></html>");
            stream_length = strlen (contents);
            stream = g_memory_input_stream_new_from_data (contents, stream_length, g_free);
        } else {
            GError *error;

            error = g_error_new (ABOUT_HANDLER_ERROR, ABOUT_HANDLER_ERROR_INVALID, "Invalid about:%s page.", path);
            webkit_uri_scheme_request_finish_error (request, error);
            g_error_free (error);
            return;
        }
        webkit_uri_scheme_request_finish (request, stream, stream_length, "text/html");
        g_object_unref (stream);
    }

#### Parameters

context | a WebKitWebContext |
scheme | the network scheme to register |
callback | a WebKitURISchemeRequestCallback. | [scope async]
user_data | data to pass to callback function |
user_data_destroy_func | destroy notify for `user_data` |

## Types and Values

### struct WebKitWebContext

    struct WebKitWebContext;

### enum WebKitCacheModel

Enum values used for determining the WebKitWebContext cache model.

#### Members

WEBKIT_CACHE_MODEL_DOCUMENT_VIEWER | Disable the cache completely, which substantially reduces memory usage. Useful for applications that only access a single local file, with no navigation to other pages. No remote resources will be cached. |
WEBKIT_CACHE_MODEL_WEB_BROWSER | Improve document load speed substantially by caching a very large number of resources and previously viewed content. |
WEBKIT_CACHE_MODEL_DOCUMENT_BROWSER | A cache model optimized for viewing a series of local files -- for example, a documentation viewer or a website designer. WebKit will cache a moderate number of resources. |

### enum WebKitProcessModel

Enum values used for determining the WebKitWebContext process model.

#### Members

WEBKIT_PROCESS_MODEL_SHARED_SECONDARY_PROCESS | Deprecated 2.26. |
WEBKIT_PROCESS_MODEL_MULTIPLE_SECONDARY_PROCESSES | Use one process for each WebKitWebView, while still allowing for some of them to share a process in certain situations. The main advantage of this process model is that the rendering process for a web view can crash while the rest of the views keep working normally. This process model is indicated for applications which may use a number of web views and the content of in each must not interfere with the rest — for example a full-fledged web browser with support for multiple tabs. |

Since: 2.4

## Property Details

### The `“memory-pressure-settings”` property

      “memory-pressure-settings” WebKitMemoryPressureSettings *

The WebKitMemoryPressureSettings applied to the web processes created by this context.

Owner: WebKitWebContext

Flags: Write / Construct Only

Since: 2.34

### The `“website-data-manager”` property

      “website-data-manager”     WebKitWebsiteDataManager *

The WebKitWebsiteDataManager associated with this context.

Owner: WebKitWebContext

Flags: Read / Write / Construct Only

Since: 2.10

## Signal Details

### The `“automation-started”` signal

    void
    user_function (WebKitWebContext        *context,
                   WebKitAutomationSession *session,
                   gpointer                 user_data)

This signal is emitted when a new automation request is made. Note that it will never be emitted if automation is not enabled in `context` , see `webkit_web_context_set_automation_allowed()` for more details.

#### Parameters

context | the WebKitWebContext |
session | the WebKitAutomationSession associated with this event |
user_data | user data set when the signal handler was connected. |

Flags: Run Last

Since: 2.18

### The `“download-started”` signal

    void
    user_function (WebKitWebContext *context,
                   WebKitDownload   *download,
                   gpointer          user_data)

This signal is emitted when a new download request is made.

#### Parameters

context | the WebKitWebContext |
download | the WebKitDownload associated with this event |
user_data | user data set when the signal handler was connected. |

Flags: Run Last

### The `“initialize-notification-permissions”` signal

    void
    user_function (WebKitWebContext *context,
                   gpointer          user_data)

This signal is emitted when a WebKitWebContext needs to set initial notification permissions for a web process. It is emitted when a new web process is about to be launched, and signals the most appropriate moment to use `webkit_web_context_initialize_notification_permissions()`. If no notification permissions have changed since the last time this signal was emitted, then there is no need to call `webkit_web_context_initialize_notification_permissions()` again.

#### Parameters

context | the WebKitWebContext |
user_data | user data set when the signal handler was connected. |

Flags: Run Last

Since: 2.16

### The `“initialize-web-extensions”` signal

    void
    user_function (WebKitWebContext *context,
                   gpointer          user_data)

This signal is emitted when a new web process is about to be launched. It signals the most appropriate moment to use `webkit_web_context_set_web_extensions_initialization_user_data()` and `webkit_web_context_set_web_extensions_directory()`.

#### Parameters

context | the WebKitWebContext |
user_data | user data set when the signal handler was connected. |

Flags: Run Last

Since: 2.4

### The `“user-message-received”` signal

    gboolean
    user_function (WebKitWebContext  *context,
                   WebKitUserMessage *message,
                   gpointer           user_data)

This signal is emitted when a WebKitUserMessage is received from a WebKitWebExtension. You can reply to the message using `webkit_user_message_send_reply()`.

You can handle the user message asynchronously by calling `g_object_ref()` on `message` and returning `TRUE`.

#### Parameters

context | the WebKitWebContext |
message | the WebKitUserMessage received |
user_data | user data set when the signal handler was connected. |

#### Returns

`TRUE` if the message was handled, or `FALSE` otherwise.

Flags: Run Last

Since: 2.28