botframework-streaming/lib/streamingResponse.js

Streaming library for the Microsoft Bot Framework

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.StreamingResponse = void 0;
/**
 * @module botframework-streaming
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
const httpContentStream_1 = require("./httpContentStream");
const subscribableStream_1 = require("./subscribableStream");
/**
 * The basic response type sent over Bot Framework Protocol 3 with Streaming Extensions transports, equivalent to HTTP response messages.
 */
class StreamingResponse {
    constructor() {
        this.streams = [];
    }
    /**
     * Creates a streaming response with the passed in method, path, and body.
     *
     * @param statusCode The HTTP verb to use for this request.
     * @param body Optional body containing additional information.
     * @returns A streaming response with the appropriate statuscode and passed in body.
     */
    static create(statusCode, body) {
        const response = new StreamingResponse();
        response.statusCode = statusCode;
        if (body) {
            response.addStream(body);
        }
        return response;
    }
    /**
     * Adds a new stream attachment to this streaming request.
     *
     * @param content The Http content to include in the new stream attachment.
     */
    addStream(content) {
        this.streams.push(new httpContentStream_1.HttpContentStream(content));
    }
    /**
     * Sets the contents of the body of this streaming response.
     *
     * @param body The JSON text to write to the body of the streaming response.
     */
    setBody(body) {
        const stream = new subscribableStream_1.SubscribableStream();
        stream.write(JSON.stringify(body), 'utf8');
        this.addStream(new httpContentStream_1.HttpContent({
            type: 'application/json; charset=utf-8',
            contentLength: stream.length,
        }, stream));
    }
}
exports.StreamingResponse = StreamingResponse;
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