User avatar Bstran

Translation changed
When an asynchronous read function receives a control frame, the
When an asynchronous read function receives a control frame, the当异步读函数收到控制帧时，
06/18/2026
User avatar Bstran

Translation changed
Unlike regular completion handlers used in calls to asynchronous initiation functions, the control callback only needs to be set once. The callback is not reset after being called. The same callback is used for both synchronous and asynchronous reads. The callback is passive; in order to be called, a stream read operation must be active.
Unlike regular completion handlers used in calls to asynchronous initiation functions, the control callback only needs to be set once. The callback is not reset after being called. The same callback is used for both synchronous and asynchronous reads. The callback is passive; in order to be called, a stream read operation must be active.与异步发起函数调用中使用的普通完成处理器不同，控制回调只需设置一次，调用后不会被重置。该回调同时用于同步和异步读取。回调是“被动”的——必须有一个流读取操作处于活动状态，回调才会被触发。
06/18/2026
User avatar Bstran

Translation changed
When a control callback is registered, it will be invoked for all pings, pongs, and close frames received through either synchronous read functions or asynchronous read functions. The type of frame and payload text are passed as parameters to the control callback. If the frame is a close frame, the close reason may be obtained by calling [link beast.ref.boost__beast__websocket__stream.reason `reason`].
When a control callback is registered, it will be invoked for all当注册控制回调后，无论是通过同步读函数还是异步读函数接收到的所有 pings, 、pongs, and close frames received through either synchronous read functions or asynchronous read functions. The type of frame and payload text are passed as parameters to the control callback. If the frame is a close frame, the close reason may be obtained by calling 和 close 帧，都会触发该回调。帧类型和有效载荷文本会作为参数传递给控制回调。如果帧为 close 帧，可通过调用 [link beast.ref.boost__beast__websocket__stream.reason `reason`]. 获取关闭原因。
06/18/2026
User avatar Bstran

Translation changed
Ping, pong, and close messages are control frames which may be sent at any time by either peer on an established WebSocket connection. They are sent using the functions [link beast.ref.boost__beast__websocket__stream.ping `ping`], [link beast.ref.boost__beast__websocket__stream.pong `pong`]. and [link beast.ref.boost__beast__websocket__stream.close `close`]. To be notified of control frames, callers may register a ['control callback] using [link beast.ref.boost__beast__websocket__stream.control_callback `control_callback`]. The object provided with this option should be callable with the following signature:
Ping, ping、pong, and 和 close messages are control frames which may be sent at any time by either peer on an established WebSocket connection. They are sent using the functions消息属于控制帧，在已建立的 WebSocket 连接上，任何一端都可以随时发送。它们分别通过 [link beast.ref.boost__beast__websocket__stream.ping `ping`], 、[link beast.ref.boost__beast__websocket__stream.pong `pong`]. and 和 [link beast.ref.boost__beast__websocket__stream.close `close`]. To be notified of control frames, callers may register a ['control callback] using 函数发送。若要接收控制帧的通知，调用方可通过 [link beast.ref.boost__beast__websocket__stream.control_callback `control_callback`]. The object provided with this option should be callable with the following signature: 注册一个控制回调。该选项提供的对象应满足以下签名要求：
06/18/2026
User avatar Bstran

Translation changed
Control Callback
控制回调函数
06/18/2026
User avatar Bstran

Translation changed
Control Callback
Control Callback控制回调函数
06/18/2026
User avatar Bstran

Translation changed
A consequence of this automatic behavior is that caller-initiated read operations can cause socket writes. However, these writes will not compete with caller-initiated write operations. For the purposes of correctness with respect to the stream invariants, caller-initiated read operations still only count as a read. This means that callers can have a simultaneously active read, write, and ping/pong operation in progress, while the implementation also automatically handles control frames.
A consequence of this automatic behavior is that caller-initiated read operations can cause socket writes. However, these writes will not compete with caller-initiated write operations. For the purposes of correctness with respect to the stream invariants, caller-initiated read operations still only count as a read. This means that callers can have a simultaneously active read, write, and ping/pong operation in progress, while the implementation also automatically handles control frames.这种自动行为会导致一个后果：调用方发起的读操作，可能触发套接字写入。但这类写入不会与调用方主动发起的写操作产生竞争。从流不变性的正确性来看，调用方发起的读操作仍只视为读取。这意味着调用方可同时进行读、写和 ping/pong 操作，同时实现也会在后台自动处理控制帧。
06/18/2026
User avatar Bstran

Translation changed
During read operations, Beast automatically reads and processes control frames. If a control callback is registered, the callback is notified of the incoming control frame. The implementation will respond to pings automatically. The receipt of a close frame initiates the WebSocket close procedure, eventually resulting in the error code [link beast.ref.boost__beast__websocket__error `error::closed`] being delivered to the caller in a subsequent read operation, assuming no other error takes place.
During read operations, Beast automatically reads and processes control frames. If a control callback is registered, the callback is notified of the incoming control frame. The implementation will respond to pings automatically. The receipt of a close frame initiates the WebSocket close procedure, eventually resulting in the error code在执行读取操作期间，Beast 会自动读取并处理控制帧。如果注册了控制回调函数，该回调会收到传入控制帧的通知。实现会自动响应 ping。当收到 close 帧时，会触发 WebSocket 关闭流程，最终在后续的读取操作中（假设没有发生其他错误）向调用方传递错误码 [link beast.ref.boost__beast__websocket__error `error::closed`] being delivered to the caller in a subsequent read operation, assuming no other error takes place.]。
06/18/2026
User avatar Bstran

Translation changed
A sent ping indicates a request that the sender wants to receive a pong. A pong is a response to a ping. Pongs may be sent unsolicited, at any time. One use for an unsolicited pong is to inform the remote peer that the session is still active after a long period of inactivity. A close frame indicates that the remote peer wishes to close the WebSocket connection. The connection is considered gracefully closed when each side has sent and received a close frame.
A sent ping indicates a request that the sender wants to receive a发送 ping 表示发送方希望收到 pong. A 响应。pong is a response to a ping. Pongs may be sent unsolicited, at any time. One use for an unsolicited pong is to inform the remote peer that the session is still active after a long period of inactivity. A close frame indicates that the remote peer wishes to close the WebSocket connection. The connection is considered gracefully closed when each side has sent and received a close frame.是对 ping 的回复，也可以在任何时候主动发送。主动发送 pong 的一个用途是，在长时间没有数据传输时，告知远端对端连接仍然活跃。close 帧表示对端请求关闭 WebSocket 连接。当双方都完成发送并接收到 close 帧后，连接视为已正常关闭。
06/18/2026
User avatar Bstran

Translation changed
Control frames are small (less than 128 bytes) messages entirely contained in an individual WebSocket frame. They may be sent at any time by either peer on an established connection, and can appear in between continuation frames for a message. There are three types of control frames: ping, pong, and close.
Control frames are small (less than 128 bytes) messages entirely contained in an individual WebSocket frame. They may be sent at any time by either peer on an established connection, and can appear in between continuation frames for a message. There are three types of control frames: 控制帧是小型消息（小于 128 字节），完全包含在单个 WebSocket 帧中。已建立连接的任意一端可以在任何时间发送控制帧，并且控制帧可以出现在消息的连续帧之间。控制帧分为三种类型：ping, 、pong, and 和 close.。
06/18/2026
User avatar Bstran

Translation changed
Control Frames
Control Frames控制帧
06/18/2026
User avatar Bstran

Translation changed
For these cases, the partial data oriented interface may be used. This example reads and echoes a complete message using this interface:
For these cases, the partial data oriented interface may be used. This example reads and echoes a complete message using this interface:在这些情况下，可以使用面向部分数据的接口。以下示例使用该接口读取并回显完整消息：
06/18/2026
User avatar Bstran

Translation changed
* Streaming multimedia to an endpoint.
* Sending a message that does not fit in memory at once.
* Providing incremental results as they become available.
* Streaming multimedia to an endpoint.
* Sending a message that does not fit in memory at once.
* Providing incremental results as they become available.将流式多媒体数据发送到终端。
* 发送无法一次性装入内存的消息。
* 在结果可用时逐步提供。
06/18/2026
User avatar Bstran

Translation changed
Some use-cases make it impractical or impossible to buffer the entire message ahead of time:
Some use-cases make it impractical or impossible to buffer the entire message ahead of time:某些场景下，提前将整个消息缓冲起来并不现实或不可行：
06/18/2026
User avatar Bstran

Translation changed
Frames
Frames消息帧
06/18/2026
User avatar Bstran

Translation changed
After the WebSocket handshake is accomplished, callers may send and receive messages using the message oriented interface. This interface requires that all of the buffers representing the message are known ahead of time:
After the完成 WebSocket handshake is accomplished, callers may send and receive messages using the message oriented interface. This interface requires that all of the buffers representing the message are known ahead of time:握手后，调用方可以使用面向消息的接口收发消息。该接口要求表示消息的所有缓冲区必须事先已知：
06/18/2026
User avatar Bstran

Translation changed
Read part of a message into a __MutableBufferSequence__.
Read part of a message into a __将消息的部分内容读入 MutableBufferSequence__.。
06/18/2026
User avatar Bstran

Translation changed
[link beast.ref.boost__beast__websocket__stream.read_some.overload4 `read_some`], [link beast.ref.boost__beast__websocket__stream.async_read_some.overload2 `async_read_some`]
[link beast.ref.boost__beast__websocket__stream.read_some.overload4 `read_some`], [link beast.ref.boost__beast__websocket__stream.async_read_some.overload2 `async_read_some`]
06/18/2026
User avatar Bstran

Translation changed
Read part of a message into a __DynamicBuffer__.
Read part of a message into a将消息的部分内容读入 __DynamicBuffer__.。
06/18/2026
User avatar Bstran

Translation changed
[link beast.ref.boost__beast__websocket__stream.read_some.overload2 `read_some`], [link beast.ref.boost__beast__websocket__stream.async_read_some.overload1 `async_read_some`]
[link beast.ref.boost__beast__websocket__stream.read_some.overload2 `read_some`], [link beast.ref.boost__beast__websocket__stream.async_read_some.overload1 `async_read_some`]
06/18/2026

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