@aspnet/signalr
Version:
ASP.NET Core SignalR Client
52 lines • 2.67 kB
JavaScript
// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
import { TextMessageFormat } from "./TextMessageFormat";
import { isArrayBuffer } from "./Utils";
/** @private */
var HandshakeProtocol = /** @class */ (function () {
function HandshakeProtocol() {
}
// Handshake request is always JSON
HandshakeProtocol.prototype.writeHandshakeRequest = function (handshakeRequest) {
return TextMessageFormat.write(JSON.stringify(handshakeRequest));
};
HandshakeProtocol.prototype.parseHandshakeResponse = function (data) {
var responseMessage;
var messageData;
var remainingData;
if (isArrayBuffer(data)) {
// Format is binary but still need to read JSON text from handshake response
var binaryData = new Uint8Array(data);
var separatorIndex = binaryData.indexOf(TextMessageFormat.RecordSeparatorCode);
if (separatorIndex === -1) {
throw new Error("Message is incomplete.");
}
// content before separator is handshake response
// optional content after is additional messages
var responseLength = separatorIndex + 1;
messageData = String.fromCharCode.apply(null, binaryData.slice(0, responseLength));
remainingData = (binaryData.byteLength > responseLength) ? binaryData.slice(responseLength).buffer : null;
}
else {
var textData = data;
var separatorIndex = textData.indexOf(TextMessageFormat.RecordSeparator);
if (separatorIndex === -1) {
throw new Error("Message is incomplete.");
}
// content before separator is handshake response
// optional content after is additional messages
var responseLength = separatorIndex + 1;
messageData = textData.substring(0, responseLength);
remainingData = (textData.length > responseLength) ? textData.substring(responseLength) : null;
}
// At this point we should have just the single handshake message
var messages = TextMessageFormat.parse(messageData);
responseMessage = JSON.parse(messages[0]);
// multiple messages could have arrived with handshake
// return additional data to be parsed as usual, or null if all parsed
return [remainingData, responseMessage];
};
return HandshakeProtocol;
}());
export { HandshakeProtocol };
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