cef/include/capi/cef_request_context_handler_capi.h
Marshall Greenblatt 8f240861e3 Implement NetworkService request interception/handling (see issue #2622).
Implementation notes:
- Chromium change: CookieMonster::SetCookieableSchemes needs to be called
  immediately after the CookieMonster is created in NetworkContext::
  ApplyContextParamsToBuilder. Add a Profile::GetCookieableSchemes method and
  NetworkContextParams.cookieable_schemes member (set from
  ProfileNetworkContextService::CreateNetworkContextParams) to support that.
- Chromium change: Add a ContentBrowserClient::HandleExternalProtocol variant
  that exposes additional NetworkService request information.
- GetResourceResponseFilter is not yet implemented.

API changes:
- Resource-related callbacks have been moved from CefRequestHandler to a new
  CefResourceRequestHandler interface which is returned via the
  GetResourceRequestHandler method. If the CefRequestHandler declines to handle
  a resource it can optionally be handled by the CefRequestContextHandler, if
  any, associated with the loading context.
- The OnProtocolExecution callback has been moved from CefRequestHandler to
  CefResourceRequestHandler and will be called if a custom scheme request is
  unhandled.
- Cookie send/save permission callbacks have been moved from CefRequestHandler
  and CefResourceHandler to CefResourceRequestHandler.
- New methods added to CefResourceHandler that better match NetworkService
  execution sequence expectations. The old methods are now deprecated.
- New methods added to CefRequest and CefResponse.

Known behavior changes with the NetworkService implementation:
- Modifying the |new_url| parameter in OnResourceRedirect will no longer result
  in the method being called an additional time (likely a bug in the old
  implementation).
- Modifying the request URL in OnResourceResponse would previously cause a
  redirect. This behavior is now deprecated because the NetworkService does not
  support this functionality when using default network loaders. Temporary
  support has been added in combination with CefResourceHandler usage only.
- Other changes to the request object in OnResourceResponse will now cause the
  request to be restarted. This means that OnBeforeResourceLoad, etc, will be
  called an additional time with the new request information.
- CefResponse::GetMimeType will now be empty for non-200 responses.
- Requests using custom schemes can now be handled via CefResourceRequestHandler
  with the same callback behavior as builtin schemes.
- Redirects of custom scheme requests will now be followed as expected.
- Default handling of builtin schemes can now be disabled by setting
  |disable_default_handling| to true in GetResourceRequestHandler.
- Unhandled requests (custom scheme or builtin scheme with default handling
  disabled) will fail with an CefResponse::GetError value of
  ERR_UNKNOWN_URL_SCHEME.
- The CefSchemeHandlerFactory::Create callback will now include cookie headers.

To test:
- Run `cefclient --enable-network-service`. All resources should load
  successfully (this tests the transparent proxy capability).
- All tests pass with NetworkService disabled.
- The following tests pass with NetworkService enabled:
  - CookieTest.*
  - FrameTest.* (excluding .*Nav)
  - NavigationTest.* (excluding .Redirect*)
  - RequestHandlerTest.*
  - RequestContextTest.Basic*
  - RequestContextTest.Popup*
  - RequestTest.*
  - ResourceManagerTest.*
  - ResourceRequestHandlerTest.* (excluding .Filter*)
  - SchemeHandlerTest.*
  - StreamResourceHandlerTest.*
2019-04-23 22:53:28 -04:00

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C

// Copyright (c) 2019 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ---------------------------------------------------------------------------
//
// This file was generated by the CEF translator tool and should not edited
// by hand. See the translator.README.txt file in the tools directory for
// more information.
//
// $hash=240893b4019b0bf8c69ffc1682ddabcacabcb3e4$
//
#ifndef CEF_INCLUDE_CAPI_CEF_REQUEST_CONTEXT_HANDLER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_REQUEST_CONTEXT_HANDLER_CAPI_H_
#pragma once
#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"
#include "include/capi/cef_frame_capi.h"
#include "include/capi/cef_request_capi.h"
#include "include/capi/cef_resource_request_handler_capi.h"
#include "include/capi/cef_web_plugin_capi.h"
#ifdef __cplusplus
extern "C" {
#endif
///
// Implement this structure to provide handler implementations. The handler
// instance will not be released until all objects related to the context have
// been destroyed.
///
typedef struct _cef_request_context_handler_t {
///
// Base structure.
///
cef_base_ref_counted_t base;
///
// Called on the browser process UI thread immediately after the request
// context has been initialized.
///
void(CEF_CALLBACK* on_request_context_initialized)(
struct _cef_request_context_handler_t* self,
struct _cef_request_context_t* request_context);
///
// Called on multiple browser process threads before a plugin instance is
// loaded. |mime_type| is the mime type of the plugin that will be loaded.
// |plugin_url| is the content URL that the plugin will load and may be NULL.
// |is_main_frame| will be true (1) if the plugin is being loaded in the main
// (top-level) frame, |top_origin_url| is the URL for the top-level frame that
// contains the plugin when loading a specific plugin instance or NULL when
// building the initial list of enabled plugins for 'navigator.plugins'
// JavaScript state. |plugin_info| includes additional information about the
// plugin that will be loaded. |plugin_policy| is the recommended policy.
// Modify |plugin_policy| and return true (1) to change the policy. Return
// false (0) to use the recommended policy. The default plugin policy can be
// set at runtime using the `--plugin-policy=[allow|detect|block]` command-
// line flag. Decisions to mark a plugin as disabled by setting
// |plugin_policy| to PLUGIN_POLICY_DISABLED may be cached when
// |top_origin_url| is NULL. To purge the plugin list cache and potentially
// trigger new calls to this function call
// cef_request_tContext::PurgePluginListCache.
///
int(CEF_CALLBACK* on_before_plugin_load)(
struct _cef_request_context_handler_t* self,
const cef_string_t* mime_type,
const cef_string_t* plugin_url,
int is_main_frame,
const cef_string_t* top_origin_url,
struct _cef_web_plugin_info_t* plugin_info,
cef_plugin_policy_t* plugin_policy);
///
// Called on the browser process IO thread before a resource request is
// initiated. The |browser| and |frame| values represent the source of the
// request, and may be NULL for requests originating from service workers.
// |request| represents the request contents and cannot be modified in this
// callback. |is_navigation| will be true (1) if the resource request is a
// navigation. |is_download| will be true (1) if the resource request is a
// download. |request_initiator| is the origin (scheme + domain) of the page
// that initiated the request. Set |disable_default_handling| to true (1) to
// disable default handling of the request, in which case it will need to be
// handled via cef_resource_request_handler_t::GetResourceHandler or it will
// be canceled. To allow the resource load to proceed with default handling
// return NULL. To specify a handler for the resource return a
// cef_resource_request_handler_t object. This function will not be called if
// the client associated with |browser| returns a non-NULL value from
// cef_request_tHandler::GetResourceRequestHandler for the same request
// (identified by cef_request_t::GetIdentifier).
///
struct _cef_resource_request_handler_t*(
CEF_CALLBACK* get_resource_request_handler)(
struct _cef_request_context_handler_t* self,
struct _cef_browser_t* browser,
struct _cef_frame_t* frame,
struct _cef_request_t* request,
int is_navigation,
int is_download,
const cef_string_t* request_initiator,
int* disable_default_handling);
} cef_request_context_handler_t;
#ifdef __cplusplus
}
#endif
#endif // CEF_INCLUDE_CAPI_CEF_REQUEST_CONTEXT_HANDLER_CAPI_H_