RTCPeerConnection.setRemoteDescription()

Experimental: 这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

RTCPeerConnection.setRemoteDescription() 方法改变与连接相关的描述，该描述主要是描述有些关于连接的属性，例如对端使用的解码器。连接受此更改影响，并且必须能够支持旧的和新的描述。方法带三个参数，RTCSessionDescription 对象用于设置，然后是更改成功的回调方法，一个是更改失败的回调方法。

方法是异步的，不用等待设置完成，成功会调用成功回调方法，失败则会调用错误回调方法。

连接的 offer 通常来自于负责匹配的服务器所发送的数据。执行者应调用此方法设置远程描述，然后生成发送到对端计算机的 answer。

语法

aPromise = pc.setRemoteDescription(sessionDescription);

pc.setRemoteDescription(sessionDescription, successCallback, errorCallback);

这个方法没有返回值。

参数

sessionDescription

Is a DOMString is the description of the parameters to be applied to the remote session.

successCallback

Is a Function without parameter which will be called when the description has been successfully set. At this point, one can send the offer to a remote server that can forward it to a remote client

errorCallback

Is a RTCPeerConnectionErrorCallback which will be called if the description can't be set. It takes the following parameter:

  • errorInformation which is a DOMString describing the reason why the description has not been set.

Example

var pc = new PeerConnection();
pc.setRemoteDescription( new RTCSessionDescription( offer ), function() {
   pc.createAnswer( function( answer ) {
     pc.setLocalDescription( answer, function() {
       // send the answer to the remote connection
    })
  })
});

Specifications

Specification
WebRTC 1.0: Real-Time Communication Between Browsers
# dom-peerconnection-setremotedescription

Browser compatibility

BCD tables only load in the browser

See also