onvif-nvt-ts
Version:
Wrapper for ONVIF spec to control NVT (Network Video Transitter) devices. Forked and added TypeScript support from onvif-nvt.
85 lines • 2.98 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const request_1 = __importDefault(require("request"));
/**
* @class
* Provide Snapshot functionaity for cameras.
* <h3>Functions</h3>
* {@link Snapshot#getSnapshot},
* <br><br>
* <h3>Overview</h3>
* Use the Snapshot::getSnapshot() method to retrieve a snapshot from the ONVIF-compliant camera.
*/
class Snapshot {
constructor() {
this.snapshotUri = '';
}
init(snapshotUri, username, password) {
this.snapshotUri = snapshotUri;
this.username = username;
this.password = password;
}
/**
* Retrieves a snapshot from the specified camera
* @example
* const OnvifManager = require('onvif-nvt')
* OnvifManager.connect('10.10.1.60', 80, 'username', 'password')
* .then(results => {
* let camera = results
* // calling add method will automatically initialize snapshot
* // with the defaultProfile's snapshotUri
* camera.add('snapshot')
* camera.snapshot.getSnapshot()
* .then(results => {
* let mimeType = results.mimeType
* let rawImage = results.image
* let prefix = 'data:' + mimeType + ';base64,'
* let base64Image = Buffer.from(rawImage, 'binary').toString('base64')
* let image = prefix + base64Image
* // 'image' is now ready to be displayed on a web page
* // ...
* })
* }
* })
*/
getSnapshot() {
return new Promise((resolve, reject) => {
const params = {
method: 'GET',
uri: this.snapshotUri,
gzip: true,
encoding: 'binary'
};
if (typeof this.username === 'string' && typeof this.password === 'string') {
// Authentication is required only when 'username' and 'password' are provided
params.auth = {
user: this.username,
pass: this.password,
sendImmediately: false
};
}
request_1.default(params, (error, response, body) => {
if (error) {
reject(error);
return;
}
if (response.statusCode === 200) {
const mimeType = response.headers['content-type'];
const data = {
mimeType: mimeType,
image: Buffer.from(body, 'binary')
};
resolve(data);
}
else {
reject(response);
}
});
});
}
}
exports.default = Snapshot;
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