iot/projects/IoT/IoTServices/ONVIFService/Infrastructure/IPCamera.cs

using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;

namespace ONVIFService
{
    public class IPCamera
    {
        public string DiscoveryXml { get; set; }
        public string GetCapabilitiesXml { get; set; }
        public string DeviceUrl { get; set; }
        public string Id { get; set; }
        public string MediaUrl { get; set; }
        public string GetProfilesXml { get; set; }
        public string UserName { get; set; }
        public string Password { get; set; }
        public string PTZAddress { get; set; }
        public bool Ptz3DZoomSupport { get; set; }
        public List<string> Tokens { get; set; }
        public string StreamUriXml { get; set; }
        public string StreamUri { get; set; }
        public string SnapshotUriXml { get; set; }
        public string SnapshotUri { get; set; }

        public void ParseDiscovery()
        {
            this.DeviceUrl = this.RegexMatch(this.DiscoveryXml, @"[^<>\s]*", @"<d:XAddrs>", @"(\s+|</d:XAddrs>)");
            this.Id = this.RegexMatch(this.DiscoveryXml, @"[^<>\s]*", @"<wsa(dis)?:Address>", @"(\s+|</wsa(dis)?:Address>)").Replace("urn:uuid:", "").Replace("-", "");
        }

        public void ParseCapabilities()
        {
            this.MediaUrl = this.RegexMatch(this.GetCapabilitiesXml, @"[^<>\s]*", @"<tt:Media>\s*<tt:XAddr>", @"(\s+|</tt:XAddr>)");
            this.PTZAddress = this.RegexMatch(this.GetCapabilitiesXml, @"[^<>]*", @"<tt:PTZ>\s*<tt:XAddr>", @"</tt:XAddr>");
            var ptz3DZoomValue = this.RegexMatch(this.GetCapabilitiesXml, @"[^<>]*", @"<hikxsd:PTZ3DZoomSupport>", @"</hikxsd:PTZ3DZoomSupport>");
            this.Ptz3DZoomSupport = bool.TryParse(ptz3DZoomValue, out bool ptz3DZoomSupportBool) ? ptz3DZoomSupportBool : false;
        }

        public void ParseProfiles()
        {
            this.Tokens = Regex.Matches(this.GetProfilesXml, @"trt:Profiles[^<>]+token\s*=\s*""([^""]*)""").Select(o => o.Groups[1].Value).Where(o => !string.IsNullOrEmpty(o)).ToList();
        }

        public void ParseStreamUri()
        {
            this.StreamUri = WebUtility.HtmlDecode(this.RegexMatch(this.StreamUriXml, @"[^<>]*", @"<tt:Uri>", @"</tt:Uri>"));
        }

        public void ParseSnapshotUri()
        {
            this.SnapshotUri = WebUtility.HtmlDecode(this.RegexMatch(this.SnapshotUriXml, @"[^<>]*", @"<tt:Uri>", @"</tt:Uri>"));
        }

        private string RegexMatch(string input, string pattern, string prefix, string suffix)
        {
            return Regex.Match(input, $"(?<={prefix}){pattern}(?={suffix})").Value;
        }
    }
}