56 lines
2.8 KiB
JavaScript
56 lines
2.8 KiB
JavaScript
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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import { TextMessageFormat } from "./TextMessageFormat";
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import { isArrayBuffer } from "./Utils";
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/** @private */
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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
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HandshakeProtocol.prototype.writeHandshakeRequest = function (handshakeRequest) {
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return TextMessageFormat.write(JSON.stringify(handshakeRequest));
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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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if (isArrayBuffer(data) || (typeof Buffer !== "undefined" && data instanceof Buffer)) {
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// Format is binary but still need to read JSON text from handshake response
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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
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// optional content after is additional messages
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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
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// optional content after is additional messages
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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
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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.");
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}
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responseMessage = response;
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// multiple messages could have arrived with handshake
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// return additional data to be parsed as usual, or null if all parsed
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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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//# sourceMappingURL=HandshakeProtocol.js.map
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