axis-snapshot/src/Jpeg.js

A Node.js library written in TypeScript capable of getting snapshots from Axis Communication cameras.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.handleJpeg = exports.JpegRequest = void 0;
const axis_core_1 = require("axis-core");
const convert_1 = require("./convert");
class JpegRequest extends axis_core_1.DeviceRequest {
    constructor(connection, options) {
        let relativePath = '/axis-cgi/jpg/image.cgi';
        const queryString = (0, convert_1.toQueryString)(options);
        if (queryString !== null) {
            relativePath += '?' + queryString;
        }
        super(connection, relativePath);
    }
}
exports.JpegRequest = JpegRequest;
const handleJpeg = (res) => __awaiter(void 0, void 0, void 0, function* () {
    var _a;
    if (!res.ok) {
        throw new Error(`Failed to handle jpeg response: ${res.status} ${res.statusText}`);
    }
    // image/bitmap
    const contentType = (_a = res.headers.get('content-type')) === null || _a === void 0 ? void 0 : _a.split(';')[0];
    if (contentType !== 'image/jpeg') {
        throw new Error(`Failed to handle jpeg response, invalid content type: ${contentType}`);
    }
    const blob = yield res.blob();
    const arrayBuffer = yield blob.arrayBuffer();
    const buffer = Buffer.from(arrayBuffer);
    return buffer;
});
exports.handleJpeg = handleJpeg;
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