1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Dlna;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace MediaBrowser.Dlna.Eventing
{
public class EventManager : IEventManager
{
private readonly ConcurrentDictionary<string, EventSubscription> _subscriptions =
new ConcurrentDictionary<string, EventSubscription>(StringComparer.OrdinalIgnoreCase);
private readonly ILogger _logger;
private readonly IHttpClient _httpClient;
public EventManager(ILogger logger, IHttpClient httpClient)
{
_httpClient = httpClient;
_logger = logger;
}
public EventSubscriptionResponse RenewEventSubscription(string subscriptionId, int? timeoutSeconds)
{
var timeout = timeoutSeconds ?? 300;
var subscription = GetSubscription(subscriptionId, true);
_logger.Debug("Renewing event subscription for {0} with timeout of {1} to {2}",
subscription.NotificationType,
timeout,
subscription.CallbackUrl);
subscription.TimeoutSeconds = timeout;
subscription.SubscriptionTime = DateTime.UtcNow;
return GetEventSubscriptionResponse(subscriptionId, timeout);
}
public EventSubscriptionResponse CreateEventSubscription(string notificationType, int? timeoutSeconds, string callbackUrl)
{
var timeout = timeoutSeconds ?? 300;
var id = "uuid:" + Guid.NewGuid().ToString("N");
_logger.Debug("Creating event subscription for {0} with timeout of {1} to {2}",
notificationType,
timeout,
callbackUrl);
_subscriptions.TryAdd(id, new EventSubscription
{
Id = id,
CallbackUrl = callbackUrl,
SubscriptionTime = DateTime.UtcNow,
TimeoutSeconds = timeout
});
return GetEventSubscriptionResponse(id, timeout);
}
public EventSubscriptionResponse CancelEventSubscription(string subscriptionId)
{
_logger.Debug("Cancelling event subscription {0}", subscriptionId);
EventSubscription sub;
_subscriptions.TryRemove(subscriptionId, out sub);
return new EventSubscriptionResponse
{
Content = "\r\n",
ContentType = "text/plain"
};
}
private readonly CultureInfo _usCulture = new CultureInfo("en-US");
private EventSubscriptionResponse GetEventSubscriptionResponse(string subscriptionId, int timeoutSeconds)
{
var response = new EventSubscriptionResponse
{
Content = "\r\n",
ContentType = "text/plain"
};
response.Headers["SID"] = subscriptionId;
response.Headers["TIMEOUT"] = "SECOND-" + timeoutSeconds.ToString(_usCulture);
return response;
}
public EventSubscription GetSubscription(string id)
{
return GetSubscription(id, false);
}
private EventSubscription GetSubscription(string id, bool throwOnMissing)
{
EventSubscription e;
if (!_subscriptions.TryGetValue(id, out e) && throwOnMissing)
{
throw new ResourceNotFoundException("Event with Id " + id + " not found.");
}
return e;
}
public Task TriggerEvent(string notificationType, IDictionary<string, string> stateVariables)
{
var subs = _subscriptions.Values
.Where(i => !i.IsExpired && string.Equals(notificationType, i.NotificationType, StringComparison.OrdinalIgnoreCase))
.ToList();
var tasks = subs.Select(i => TriggerEvent(i, stateVariables));
return Task.WhenAll(tasks);
}
private async Task TriggerEvent(EventSubscription subscription, IDictionary<string, string> stateVariables)
{
var builder = new StringBuilder();
builder.Append("<?xml version=\"1.0\"?>");
builder.Append("<e:propertyset xmlns:e=\"urn:schemas-upnp-org:event-1-0\">");
foreach (var key in stateVariables.Keys)
{
builder.Append("<e:property>");
builder.Append("<" + key + ">");
builder.Append(stateVariables[key]);
builder.Append("</" + key + ">");
builder.Append("</e:property>");
}
builder.Append("</e:propertyset>");
var options = new HttpRequestOptions
{
RequestContent = builder.ToString(),
RequestContentType = "text/xml",
Url = subscription.CallbackUrl
};
options.RequestHeaders.Add("NT", subscription.NotificationType);
options.RequestHeaders.Add("NTS", "upnp:propchange");
options.RequestHeaders.Add("SID", subscription.Id);
options.RequestHeaders.Add("SEQ", subscription.TriggerCount.ToString(_usCulture));
try
{
await _httpClient.SendAsync(options, "NOTIFY").ConfigureAwait(false);
}
catch (OperationCanceledException)
{
throw;
}
catch
{
// Already logged at lower levels
}
finally
{
subscription.IncrementTriggerCount();
}
}
}
}
|
