应用程序构造
每个 CEF3 应用程序都有一个雷同的构造：
- 提供一个入口函数以初始化 CEF 和运行每个子过程逻辑和 CEF 音讯解决
- 提供一个 CefApp 子类解决某个过程的回调
- 提供一个 CefClinet 子类解决某个浏览过程的回调
- 调用 CefBrowserHost::CreateBrowser() 函数创立浏览过程实例并应用 CefLifeSpanHandler 来管 - 理浏览生命周期
typedef struct _cef_settings_t {
///
// Size of this structure.
///
size_t size;
///
// Set to true (1) to use a single process for the browser and renderer. This
// run mode is not officially supported by Chromium and is less stable than
// the multi-process default. Also configurable using the "single-process"
// command-line switch.
///
bool single_process;
///
// The path to a separate executable that will be launched for sub-processes.
// By default the browser process executable is used. See the comments on
// CefExecuteProcess() for details. Also configurable using the
// "browser-subprocess-path" command-line switch.
///
cef_string_t browser_subprocess_path;
///
// Set to true (1) to have the browser process message loop run in a separate
// thread. If false (0) than the CefDoMessageLoopWork() function must be
// called from your application message loop.
///
bool multi_threaded_message_loop;
///
// Set to true (1) to disable configuration of browser process features using
// standard CEF and Chromium command-line arguments. Configuration can still
// be specified using CEF data structures or via the
// CefApp::OnBeforeCommandLineProcessing() method.
///
bool command_line_args_disabled;
///
// The location where cache data will be stored on disk. If empty an in-memory
// cache will be used for some features and a temporary disk cache for others.
// HTML5 databases such as localStorage will only persist across sessions if a
// cache path is specified.
///
cef_string_t cache_path;
///
// To persist session cookies (cookies without an expiry date or validity
// interval) by default when using the global cookie manager set this value to
// true. Session cookies are generally intended to be transient and most Web
// browsers do not persist them. A |cache_path| value must also be specified to
// enable this feature. Also configurable using the "persist-session-cookies"
// command-line switch.
///
bool persist_session_cookies;
///
// Value that will be returned as the User-Agent HTTP header. If empty the
// default User-Agent string will be used. Also configurable using the
// "user-agent" command-line switch.
///
cef_string_t user_agent;
///
// Value that will be inserted as the product portion of the default
// User-Agent string. If empty the Chromium product version will be used. If
// |userAgent| is specified this value will be ignored. Also configurable
// using the "product-version" command-line switch.
///
cef_string_t product_version;
///
// The locale string that will be passed to WebKit. If empty the default
// locale of "en-US" will be used. This value is ignored on Linux where locale
// is determined using environment variable parsing with the precedence order:
// LANGUAGE, LC_ALL, LC_MESSAGES and LANG. Also configurable using the "lang"
// command-line switch.
///
cef_string_t locale;
///
// The directory and file name to use for the debug log. If empty, the
// default name of "debug.log" will be used and the file will be written
// to the application directory. Also configurable using the "log-file"
// command-line switch.
///
cef_string_t log_file;
///
// The log severity. Only messages of this severity level or higher will be
// logged. Also configurable using the "log-severity" command-line switch with
// a value of "verbose", "info", "warning", "error", "error-report" or
// "disable".
///
cef_log_severity_t log_severity;
///
// Enable DCHECK in release mode to ease debugging. Also configurable using the
// "enable-release-dcheck" command-line switch.
///
bool release_dcheck_enabled;
///
// Custom flags that will be used when initializing the V8 JavaScript engine.
// The consequences of using custom flags may not be well tested. Also
// configurable using the "js-flags" command-line switch.
///
cef_string_t javascript_flags;
///
// The fully qualified path for the resources directory. If this value is
// empty the cef.pak and/or devtools_resources.pak files must be located in
// the module directory on Windows/Linux or the app bundle Resources directory
// on Mac OS X. Also configurable using the "resources-dir-path" command-line
// switch.
///
cef_string_t resources_dir_path;
///
// The fully qualified path for the locales directory. If this value is empty
// the locales directory must be located in the module directory. This value
// is ignored on Mac OS X where pack files are always loaded from the app
// bundle Resources directory. Also configurable using the "locales-dir-path"
// command-line switch.
///
cef_string_t locales_dir_path;
///
// Set to true (1) to disable loading of pack files for resources and locales.
// A resource bundle handler must be provided for the browser and render
// processes via CefApp::GetResourceBundleHandler() if loading of pack files
// is disabled. Also configurable using the "disable-pack-loading" command-
// line switch.
///
bool pack_loading_disabled;
///
// Set to a value between 1024 and 65535 to enable remote debugging on the
// specified port. For example, if 8080 is specified the remote debugging URL
// will be http://localhost:8080. CEF can be remotely debugged from any CEF or
// Chrome browser window. Also configurable using the "remote-debugging-port"
// command-line switch.
///
int remote_debugging_port;
///
// The number of stack trace frames to capture for uncaught exceptions.
// Specify a positive value to enable the CefV8ContextHandler::
// OnUncaughtException() callback. Specify 0 (default value) and
// OnUncaughtException() will not be called. Also configurable using the
// "uncaught-exception-stack-size" command-line switch.
///
int uncaught_exception_stack_size;
///
// By default CEF V8 references will be invalidated (the IsValid() method will
// return false) after the owning context has been released. This reduces the
// need for external record keeping and avoids crashes due to the use of V8
// references after the associated context has been released.
//
// CEF currently offers two context safety implementations with different
// performance characteristics. The default implementation (value of 0) uses a
// map of hash values and should provide better performance in situations with
// a small number contexts. The alternate implementation (value of 1) uses a
// hidden value attached to each context and should provide better performance
// in situations with a large number of contexts.
//
// If you need better performance in the creation of V8 references and you
// plan to manually track context lifespan you can disable context safety by
// specifying a value of -1.
//
// Also configurable using the "context-safety-implementation" command-line
// switch.
///
int context_safety_implementation;
///
// Set to true (1) to ignore errors related to invalid SSL certificates.
// Enabling this setting can lead to potential security vulnerabilities like
// "man in the middle" attacks. Applications that load content from the
// internet should not enable this setting. Also configurable using the
// "ignore-certificate-errors" command-line switch.
///
bool ignore_certificate_errors;
///
// Used on Mac OS X to specify the background color for hardware accelerated
// content.
///
cef_color_t background_color;
} cef_settings_t; 罕用成员
single_process 设置为 true 将为浏览器和渲染应用单过程。也可配置应用单个过程的命令行开关。
browser_subprocess_path 子过程的单个执行体门路，
multi_threaded_message_loop 为 true 示意浏览器过程的音讯循环以单线程运行。
command_line_args_idsabled 为 true 示意禁用应用规范的 CEF 和 Chrominum 命令行参数的浏览器过程配置的个性。
cache_path 缓存数据保留在磁盘上，如果为空，内存缓存会被某些个性应用，长期磁盘缓存会被其余中央应用。如果不为空，如 HTML5 本地存储数据库会跨域。
locale locale 字符串会传递给 blink, 默认为 en-US
log_file 为 debuglog 文件门路
log_severity 日志等级
resources_dir_path 材料的目录门路。即 cef.pak 或 devtools_resources.pak 文件的保留门路
locales_dir_path
locales_dir_path locales 的保留门路
remote_debugging_port 近程调试端口。范畴在 1024~65535