68 lines
3.5 KiB
JavaScript
68 lines
3.5 KiB
JavaScript
// 版权所有（c）.NET基金会。保留所有权利。
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// 在2.0版Apache许可下授权。有关许可证信息，请参见项目根目录中的License.txt。
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import { TextMessageFormat } from "./TextMessageFormat";
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import { isArrayBuffer } from "./Utils";
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/**
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* 握手协议
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* @private
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*/
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var HandshakeProtocol = /** @class */ (function () {
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function HandshakeProtocol() {
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}
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// Handshake request is always JSON - 握手请求总是JSON
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HandshakeProtocol.prototype.writeHandshakeRequest = function (handshakeRequest) {
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// commond
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return TextMessageFormat.write(JSON.stringify(handshakeRequest));
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};
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/**
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* 解析握手协议 response
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*
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* @param {*} data
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* @returns {[any, HandshakeResponseMessage]}
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* @memberof HandshakeProtocol
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*/
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HandshakeProtocol.prototype.parseHandshakeResponse = function (data) {
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var responseMessage;
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var messageData;
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var remainingData;
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// ! 删除了 @aspnet/signlaR 原有的 Buffer(仅适用 nodejs)判断
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if (isArrayBuffer(data)) {
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// Format is binary but still need to read JSON text from handshake response - fy: 格式是二进制的，但仍然需要从握手响应中读取JSON文本
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var binaryData = new Uint8Array(data);
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var separatorIndex = binaryData.indexOf(TextMessageFormat.RecordSeparatorCode);
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if (separatorIndex === -1) {
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throw new Error("Message is incomplete.");
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}
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// content before separator is handshake response - fy:分隔符前的内容是握手响应
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// optional content after is additional messages - fy:后面是附加消息的可选内容
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var responseLength = separatorIndex + 1;
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messageData = String.fromCharCode.apply(null, binaryData.slice(0, responseLength));
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remainingData = (binaryData.byteLength > responseLength) ? binaryData.slice(responseLength).buffer : null;
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}
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else {
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var textData = data;
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var separatorIndex = textData.indexOf(TextMessageFormat.RecordSeparator);
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if (separatorIndex === -1) {
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throw new Error("Message is incomplete.");
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}
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// content before separator is handshake response - fy:分隔符前的内容是握手响应
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// optional content after is additional messages - fy:后面是附加消息的可选内容
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var responseLength = separatorIndex + 1;
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messageData = textData.substring(0, responseLength);
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remainingData = (textData.length > responseLength) ? textData.substring(responseLength) : null;
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}
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// At this point we should have just the single handshake message - fy: 在这一点上，我们应该只有一个握手信息
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var messages = TextMessageFormat.parse(messageData);
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var response = JSON.parse(messages[0]);
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if (response.type) {
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throw new Error("Expected a handshake response from the server. -(fy: 需要来自服务器的握手响应)");
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}
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responseMessage = response;
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// multiple messages could have arrived with handshake - fy: 握手时可能会收到多条消息
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// return additional data to be parsed as usual, or null if all parsed - fy: 返回要像往常一样分析的其他数据，如果所有数据都已分析，则返回null
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return [remainingData, responseMessage];
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};
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return HandshakeProtocol;
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}());
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export { HandshakeProtocol };
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