getPreviewURL static method

Future getPreviewURL({ required String cameraIndexCode, int streamType = 1, int transmode = 1, String protocol = '', int version = 2, bool isHttps = false, })

获取预览地址

'cameraIndexCode' 监控点唯一标识

'streamType' 码流类型,0主码流,1子码流

version 1表示isc1.3版本及以前,2表示isc1.4版本及以后

transmode 协议类型( 0-udp，1-tcp),默认为tcp，在protocol设置为rtsp或者rtmp时有效

isHttps 是否使用https请求,需要根据实际情况选择参数,

protocol 取流协议（应用层协议）， “hik”:HIK私有协议，使用视频SDK进行播放时，传入此类型； “rtsp”:RTSP协议； “rtmp”:RTMP协议； “hls”:HLS协议（HLS协议只支持海康SDK协议、EHOME协议、ONVIF协议接入的设备；只支持H264视频编码和AAC音频编码）。 参数不填，默认为HIK协议

isHttps是否为https请求

Implementation

static Future<dynamic> getPreviewURL({
  required String cameraIndexCode,
  int streamType = 1,
  int transmode = 1,
  String protocol = '',
  int version = 2,
  bool isHttps = false,
}) async {
  if (cameraIndexCode.isEmpty) {
    return;
  }
  //根据版本切换地址,isc1.4之后用v2版本
  var previewURLs = previewURLsV2;
  if (version == 1) {
    previewURLs = previewURLsV1;
  }
  var headers = ArtemisConfig.createHeaders(previewURLs);

  ///根据实际服务器情况选用http或https
  String url = 'http://${ArtemisConfig.host}$previewURLs';
  if (isHttps) {
    url = 'https://${ArtemisConfig.host}$previewURLs';
  }

  Map body = Map();
  body['cameraIndexCode'] = cameraIndexCode;
  body['streamType'] = streamType;
  body['transmode'] = transmode;
  if (protocol.isNotEmpty) {
    body['protocol'] = protocol;
  }

  Dio dio = Dio();
  //增加日志
  dio.interceptors.add(LogInterceptor(requestBody: true, responseBody: true));

  // // 忽略SSL认证
  // (dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate =
  //     (client) {
  //   client.badCertificateCallback =
  //       (X509Certificate cert, String host, int port) {
  //     return true;
  //   };
  // };
  (dio.httpClientAdapter as IOHttpClientAdapter).createHttpClient = (){
    var client = HttpClient();
    client.badCertificateCallback = (X509Certificate cert, String host, int port) {
      return true;
    };
    return client;
  };
  dio.options.headers.addAll(headers);
  Response response = await dio.post(url, data: body);
  return response.data;
}