RTCPeerConnection.setRemoteDescription()

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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

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 Status Comment
WebRTC 1.0: Real-time Communication Between Browser
RTCPeerConnection.setRemoteDescription()
Working Draft Initial specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) [1] (Yes) [1] 未实现 (Yes) ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? 未实现 ? ?

[1] Though this property is not prefixed, the interface it belongs to is.

See also

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