OnvifServer-CSharp/BusinessModule/EC.App.ThatBLL/Onvif/MediaBLL.cs

using EC.App.ThatBLL.Onvif.Intf;
using EC.App.ThatService.Onvif;
using EC.Onvif;
using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;

namespace EC.App.ThatBLL.Onvif
{
	public class MediaBLL : IMediaBLL
	{
		private readonly OnvifClientService _ocService;

		public MediaBLL(OnvifClientService onvifClientService)
		{
			_ocService = onvifClientService;
		}

		public bool IsConnected(string ip)
		{
			bool flag = _ocService.TryGet(ip, out OnvifClient onvifClient);
			bool ret = flag && onvifClient.IsMediaContected();
			return ret;
		}

		public async Task<string> GetStreamUrl(string ip)
		{
			bool flag = _ocService.TryGet(ip, out OnvifClient onvifClient);
			if (!flag) return string.Empty;
			string url = await onvifClient.GetStreamUri();
			return url;
		}

		public async Task<string> GetSnapshotUrl(string ip)
		{
			bool flag = _ocService.TryGet(ip, out OnvifClient onvifClient);
			if (!flag) return string.Empty;
			string url = await onvifClient.GetSnapshotUri();
			return url;
		}

		public async Task<string> GetSnapshot(string ip)
		{
			bool flag = _ocService.TryGet(ip, out OnvifClient onvifClient);
			if (!flag) return string.Empty;
			string url = await onvifClient.GetSnapshotUri();
			HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
			request.Method = "GET";
			request.PreAuthenticate = true;
			request.Credentials = new NetworkCredential(onvifClient.Username, onvifClient.Password);
			using HttpWebResponse response = (HttpWebResponse)request.GetResponse();
			using Stream stream = response.GetResponseStream();
			using MemoryStream mStream = new();
			byte[] buffer = new byte[1024];
			int byteCount;
			do
			{
				byteCount = stream.Read(buffer, 0, buffer.Length);
				mStream.Write(buffer, 0, byteCount);
			} while (byteCount > 0);
			mStream.Position = 0;
			return Convert.ToBase64String(mStream.ToArray());
		}
	}
}