about the websocket in libdatachannal

[bestxpp]

The WebSocket send interface in libdatachannal, does it copy the data? Is it sent asynchronously? Is it thread-safe?

[paullouisageneau]

The method send(message_variant data) does not copy binary data (the library uses move semantics where possible), but send(const byte *data, size_t size) does copy the data. The library will attempt to send synchronously: if the data can be sent synchronously, send() returns true, but if it's not possible because the underlying socket buffer is full (meaning you are sending too fast), send() returns false, and the data is kept buffered and will be sent it asynchronously when possible. In any case, send() does not block on network. The method is also thread-safe, meaning you can send concurrently from different threads.

[bestxpp]

When the data I send exceeds 65535, it throws an exception

[paullouisageneau]

The max message size is 65535 bytes by default for WebSockets. Since #1086 on master, you can change it with maxMessageSize in WebSocket::Configuration.

[bestxpp]

默认情况下，WebSocket 的最大消息大小为 65535 字节。从#1086开始，您可以使用inmaster更改它。maxMessageSize``WebSocket::Configuration

thx, the framework now supports custom message sizes