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A lambda may be used in place of a named function object:
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For programs which need to modify either the outgoing WebSocket HTTP Upgrade request, the outgoing WebSocket HTTP Upgrade response, or both, the stream supports an optional property called a ['decorator]. This is a function pointer or callable object which is invoked before the implementation sends an HTTP message. The decorator receives a modifiable reference to the message, allowing for modifications. The interface to this system uses:
对于需要修改出站 WebSocket HTTP 升级请求或响应（或两者都需要）的程序，流支持一个可选属性，称为“修饰器”。修饰器是一个函数指针或可调用对象，在实现发送 HTTP 消息前会被调用。修饰器接收一个可修改的消息引用，允许对其进行修改。该系统的接口使用以下类型：
WebSocket Decorator Interface
WebSocket 修饰器接口
Name
名称
Description
描述
[link beast.ref.boost__beast__websocket__request_type `request_type`]
[link beast.ref.boost__beast__websocket__request_type `request_type`]
This is the type of the object passed to the decorator to represent HTTP Upgrade requests.
该类型表示传递给修饰器的对象，用于表示 HTTP 升级请求。
[link beast.ref.boost__beast__websocket__response_type `response_type`]
[link beast.ref.boost__beast__websocket__response_type `response_type`]
This is the type of the object passed to the decorator to represent HTTP Upgrade response.
该类型表示传递给修饰器的对象，用于表示 HTTP 升级响应。
[link beast.ref.boost__beast__websocket__stream_base__decorator `stream_base::decorator`]
[link beast.ref.boost__beast__websocket__stream_base__decorator `stream_base::decorator`]
Objects of this type are used to hold a decorator to be set on the stream using `set_option`.
该类型的对象用于保存修饰器，并通过 `set_option` 将其设置在流上。
[link beast.ref.boost__beast__websocket__stream.set_option `stream::set_option`]
[link beast.ref.boost__beast__websocket__stream.set_option `stream::set_option`]
This function is used to set a `stream_base::decorator` on the stream.
该函数用于在流上设置 `stream_base::decorator`。
This declares a normal function which decorates outgoing HTTP requests:
以下声明一个普通函数，该函数用于装饰出站 HTTP 请求。
When using a decorator, it must be set on the stream before any handshaking takes place. This sets the decorator on the stream, to be used for all subsequent calls to accept or handshake:
使用修饰器时，必须在进行任何握手之前将其设置在流上。以下代码将修饰器设置在流上，供后续所有 `accept` 或 `handshake` 调用使用：
Alternatively, a function object may be used. Small function objects will not incur a memory allocation. The follow code declares and sets a function object as a decorator:
也可以使用函数对象。小型函数对象不会产生内存分配。以下代码声明并设置一个函数对象作为修饰器：
A lambda may be used in place of a named function object:
也可以使用 lambda 表达式代替具名函数对象：
It also possible for a single decorator to handle both requests and responses, if it is overloaded for both types either as a generic lambda (C++14 and later) or as a class as shown here:
单个修饰器也可以同时处理请求和响应，只需为这两种类型提供重载，可以通过泛型 lambda（C++14 及更高版本）或类来实现，如下所示：
The implementation takes ownership by decay-copy of the invocable object used as the decorator. Move-only types are possible:
实现会通过退化拷贝的方式获取用作修饰器的可调用对象的所有权。只可移动的类型也同样适用：
Undefined behavior results if the decorator modifies the fields
如果修饰器修改以下字段，将导致未定义行为：
English Chinese (Simplified Han script) Actions
Name
名称
WebSocket Decorator Interface
WebSocket 修饰器接口
This is the type of the object passed to the decorator to represent HTTP Upgrade response.
该类型表示传递给修饰器的对象，用于表示 HTTP 升级响应。
Objects of this type are used to hold a decorator to be set on the stream using `set_option`.
该类型的对象用于保存修饰器，并通过 `set_option` 将其设置在流上。
A lambda may be used in place of a named function object:
也可以使用 lambda 表达式代替具名函数对象：
Undefined behavior results if the decorator modifies the fields
如果修饰器修改以下字段，将导致未定义行为：
The implementation takes ownership by decay-copy of the invocable object used as the decorator. Move-only types are possible:
实现会通过退化拷贝的方式获取用作修饰器的可调用对象的所有权。只可移动的类型也同样适用：
This declares a normal function which decorates outgoing HTTP requests:
以下声明一个普通函数，该函数用于装饰出站 HTTP 请求。
Decorator
修饰器
[link beast.ref.boost__beast__websocket__request_type `request_type`]
[link beast.ref.boost__beast__websocket__request_type `request_type`]
This is the type of the object passed to the decorator to represent HTTP Upgrade requests.
该类型表示传递给修饰器的对象，用于表示 HTTP 升级请求。
[link beast.ref.boost__beast__websocket__response_type `response_type`]
[link beast.ref.boost__beast__websocket__response_type `response_type`]
This function is used to set a `stream_base::decorator` on the stream.
该函数用于在流上设置 `stream_base::decorator`。
Alternatively, a function object may be used. Small function objects will not incur a memory allocation. The follow code declares and sets a function object as a decorator:
也可以使用函数对象。小型函数对象不会产生内存分配。以下代码声明并设置一个函数对象作为修饰器：
It also possible for a single decorator to handle both requests and responses, if it is overloaded for both types either as a generic lambda (C++14 and later) or as a class as shown here:
单个修饰器也可以同时处理请求和响应，只需为这两种类型提供重载，可以通过泛型 lambda（C++14 及更高版本）或类来实现，如下所示：
For programs which need to modify either the outgoing WebSocket HTTP Upgrade request, the outgoing WebSocket HTTP Upgrade response, or both, the stream supports an optional property called a ['decorator]. This is a function pointer or callable object which is invoked before the implementation sends an HTTP message. The decorator receives a modifiable reference to the message, allowing for modifications. The interface to this system uses:
对于需要修改出站 WebSocket HTTP 升级请求或响应（或两者都需要）的程序，流支持一个可选属性，称为“修饰器”。修饰器是一个函数指针或可调用对象，在实现发送 HTTP 消息前会被调用。修饰器接收一个可修改的消息引用，允许对其进行修改。该系统的接口使用以下类型：
Description
描述
[link beast.ref.boost__beast__websocket__stream_base__decorator `stream_base::decorator`]
[link beast.ref.boost__beast__websocket__stream_base__decorator `stream_base::decorator`]
[link beast.ref.boost__beast__websocket__stream.set_option `stream::set_option`]
[link beast.ref.boost__beast__websocket__stream.set_option `stream::set_option`]

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User avatar Bstran

Translation changed
A lambda may be used in place of a named function object:
A也可以使用 lambda may be used in place of a named function object:表达式代替具名函数对象：
06/18/2026
User avatar admin

String added in the repository
A lambda may be used in place of a named function object:
A lambda may be used in place of a named function object:
06/05/2026
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String information

Source string description
type: paragraph
Unit identifier
58899
Source string location
string ID 65
String age
06/05/2026
Last updated
06/26/2026
Source string age
06/05/2026
Translation file QuickBook file
doc/qbk/06_websocket/03_decorator_zh_Hans.qbk, string 17