RTCError | Web API

在此页

构造函数
特性
范例
规范
浏览器兼容性
相关话题

RTCError interface describes an error which has occurred while handling WebRTC operations. It's based upon the standard DOMException interface that describes general DOM errors.

构造函数

RTCError(): 创建并返回新 RTCError object initialized with the properties of the provided RTCErrorInit dictionary and, optionally, a string to use as the value of the error's message 特性。

特性

In addition to the properties defined by the parent interface, DOMException , RTCError includes the following properties:

errorDetail 只读: A DOMString specifying the WebRTC-specific error code identifying the type of error that occurred.
receivedAlert 只读: An unsigned long integer value indicating the fatal DTLS error which was received from the network. Only valid if the errorDetail 字符串是 dtls-failure 。若 null , no DTLS error was received.
sctpCauseCode 只读: 若 errorDetail is sctp-failure , this property is a long integer specifying the SCTP cause code indicating the cause of the failed SCTP negotiation. null if the error isn't an SCTP error.
sdpLineNumber 只读: 若 errorDetail is sdp-syntax-error , this property is a long integer identifying the line number of the SDP on which the syntax error occurred. null if the error isn't an SDP syntax error.
sentAlert 只读: 若 errorDetail is dtls-failure , this property is an unsigned long integer indicating the fatal DTLS error that was sent out by this device. If null , no DTLS error was transmitted.

所有 RTCError objects have their 名称 设为 OperationError .

范例

In this example, a handler is established for an RTCDataChannel 's error 事件。

dataChannel.addEventListener("error", (event) => {
  let error = event.error;
  if (error.errorDetail === "sdp-syntax-error") {
    let errLine = error.sdpLineNumber;
    let errMessage = error.message;
    let alertMessage = `A syntax error occurred interpreting line ${errLine} of the SDP: ${errMessage}`;
    showMyAlertMessage("Data Channel Error", alertMessage);
  } else {
    terminateMyConnection();
  }
});

If the error is an SDP syntax error—indicated by its errorDetail property being sdp-syntax-error —, a message string is constructed to present the error message and the line number within the SDP at which the error occurred. This message is then displayed using a function called showMyAlertMessage() , which stands in for whatever output mechanism this code might use.

Any other error is treated as terminal, causing a terminateMyConnection() function to be called.

The above example uses addEventListener() to add the handler for error events. You can also use the RTCDataChannel 对象的 onerror event handler property, like this:

dataChannel.onerror = (event) => {
  let error = event.error;
  /* and so forth */
};

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCError' in that specification.	候选推荐	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

No compatibility data found. Please contribute data for "api.RTCError" (depth: 1) to the MDN 兼容性数据存储库 .

元数据

最后修改： Aug 17, 2020

在此页

构造函数

特性

范例

规范

浏览器兼容性

相关话题