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teams.net/Libraries/Microsoft.Teams.Plugins/Microsoft.Teams.Plugins.AspNetCore

Libraries/Microsoft.Teams.Plugins/Microsoft.Teams.Plugins.AspNetCore/AspNetCorePlugin.cs

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1// Copyright (c) Microsoft Corporation. All rights reserved.
2// Licensed under the MIT License.
3
4using System.Text.Json;
5using System.Text.Json.Serialization;
6
7using Microsoft.AspNetCore.Builder;
8using Microsoft.AspNetCore.Http;
9using Microsoft.Teams.Api.Activities;
10using Microsoft.Teams.Api.Auth;
11using Microsoft.Teams.Api.Clients;
12using Microsoft.Teams.Apps;
13using Microsoft.Teams.Apps.Events;
14using Microsoft.Teams.Apps.Plugins;
15using Microsoft.Teams.Common.Http;
16using Microsoft.Teams.Common.Logging;
17
18using HttpRequest = Microsoft.AspNetCore.Http.HttpRequest;
19
20namespace Microsoft.Teams.Plugins.AspNetCore;
21
22[Plugin]
23public partial class AspNetCorePlugin : ISenderPlugin, IAspNetCorePlugin
24{
25 [Dependency]
26 public ILogger Logger { get; set; }
27
28 [Dependency("Token", optional: true)]
29 public IToken? Token { get; set; }
30
31 [Dependency]
32 public IHttpClient Client { get; set; }
33
34 public event EventFunction Events;
35
36 private static readonly JsonSerializerOptions _jsonSerializerOptions = new()
37 {
38 DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
39 };
40
41 public IApplicationBuilder Configure(IApplicationBuilder builder)
42 {
43 return builder;
44 }
45
46 public Task OnInit(App app, CancellationToken cancellationToken = default)
47 {
48 return Task.CompletedTask;
49 }
50
51 public Task OnStart(App app, CancellationToken cancellationToken = default)
52 {
53 Logger.Debug("OnStart");
54 return Task.CompletedTask;
55 }
56
57 public Task OnError(App app, IPlugin plugin, ErrorEvent @event, CancellationToken cancellationToken = default)
58 {
59 Logger.Debug("OnError");
60 return Task.CompletedTask;
61 }
62
63 public Task OnActivity(App app, ISenderPlugin sender, ActivityEvent @event, CancellationToken cancellationToken = default)
64 {
65 Logger.Debug("OnActivity");
66 return Task.CompletedTask;
67 }
68
69 public Task OnActivitySent(App app, ISenderPlugin sender, ActivitySentEvent @event, CancellationToken cancellationToken = default)
70 {
71 Logger.Debug("OnActivitySent");
72 return Task.CompletedTask;
73 }
74
75 public Task OnActivityResponse(App app, ISenderPlugin sender, ActivityResponseEvent @event, CancellationToken cancellationToken = default)
76 {
77 Logger.Debug("OnActivityResponse");
78 return Task.CompletedTask;
79 }
80
81 public Task<IActivity> Send(IActivity activity, Api.ConversationReference reference, CancellationToken cancellationToken = default)
82 {
83 return Send<IActivity>(activity, reference, cancellationToken);
84 }
85
86 public async Task<TActivity> Send<TActivity>(TActivity activity, Api.ConversationReference reference, CancellationToken cancellationToken = default) where TActivity : IActivity
87 {
88 var client = new ApiClient(reference.ServiceUrl, Client, cancellationToken);
89
90 activity.Conversation = reference.Conversation;
91 activity.From = reference.Bot;
92 activity.ChannelId = reference.ChannelId;
93
94 // For targeted messages with an explicit Recipient (proactive sends), preserve it.
95 // Otherwise, use the reference User from the conversation context.
96 #pragma warning disable ExperimentalTeamsTargeted
97 var isTargeted = activity.Recipient?.IsTargeted == true;
98
99 if (!isTargeted)
100 {
101 activity.Recipient = reference.User;
102 }
103
104 if (activity.Id is not null && !activity.IsStreaming)
105 {
106 if (isTargeted)
107 {
108 await client
109 .Conversations
110 .Activities
111 .UpdateTargetedAsync(reference.Conversation.Id, activity.Id, activity);
112 }
113 else
114 {
115 await client
116 .Conversations
117 .Activities
118 .UpdateAsync(reference.Conversation.Id, activity.Id, activity);
119 }
120
121 return activity;
122 }
123
124 var res = isTargeted
125 ? await client.Conversations.Activities.CreateTargetedAsync(reference.Conversation.Id, activity)
126 : await client.Conversations.Activities.CreateAsync(reference.Conversation.Id, activity);
127 #pragma warning restore ExperimentalTeamsTargeted
128
129 activity.Id = res?.Id;
130 return activity;
131 }
132
133 public IStreamer CreateStream(Api.ConversationReference reference, CancellationToken cancellationToken = default)
134 {
135 return new Stream()
136 {
137 Send = async activity =>
138 {
139 var res = await Send(activity, reference, cancellationToken);
140 return res;
141 }
142 };
143 }
144
145 public async Task<Response> Do(ActivityEvent @event, CancellationToken cancellationToken = default)
146 {
147 try
148 {
149 var @out = await Events(
150 this,
151 "activity",
152 @event,
153 cancellationToken
154 );
155
156 var res = (Response?)@out ?? throw new Exception("expected activity response");
157 Logger.Debug(res);
158 return res;
159 }
160 catch (Exception ex)
161 {
162 Logger.Error(ex);
163 await Events(
164 this,
165 "error",
166 new ErrorEvent() { Exception = ex },
167 cancellationToken
168 );
169
170 return new Response(System.Net.HttpStatusCode.InternalServerError, ex.ToString());
171 }
172 }
173
174 public async Task<IResult> Do(HttpContext httpContext, CancellationToken cancellationToken = default)
175 {
176 try
177 {
178 var request = httpContext.Request;
179 var token = ExtractToken(request);
180 var activity = await ParseActivity(request);
181
182 if (activity is null)
183 {
184 return Results.BadRequest("Missing activity");
185 }
186
187 var data = new Dictionary<string, object?>
188 {
189 ["Request.TraceId"] = httpContext.TraceIdentifier
190 };
191
192 foreach (var pair in httpContext.Items)
193 {
194 var key = pair.Key.ToString();
195
196 if (key is null) continue;
197
198 data[key] = pair.Value;
199 }
200
201 var res = await Do(new ActivityEvent()
202 {
203 Token = token,
204 Activity = activity,
205 Extra = data,
206 Services = httpContext.RequestServices
207 }, cancellationToken);
208
209 // convert response metadata to headers
210 foreach (var (key, value) in res.Meta)
211 {
212 var str = value?.ToString();
213 if (string.IsNullOrEmpty(str)) continue;
214 httpContext.Response.Headers.Append($"X-Teams-{char.ToUpper(key[0]) + key[1..]}", str);
215 }
216
217 return Results.Json(
218 res.Body,
219 _jsonSerializerOptions,
220 contentType: null,
221 statusCode: (int)res.Status
222 );
223 }
224 catch (Exception ex)
225 {
226 Logger.Error(ex);
227 await Events(
228 this,
229 "error",
230 new ErrorEvent() { Exception = ex },
231 cancellationToken
232 );
233
234 return Results.Problem(detail: ex.Message, statusCode: 500);
235 }
236 }
237
238 public JsonWebToken ExtractToken(HttpRequest httpRequest)
239 {
240 var authHeader = httpRequest.Headers.Authorization.FirstOrDefault() ?? throw new UnauthorizedAccessException();
241 return new JsonWebToken(authHeader.Replace("Bearer ", ""));
242 }
243
244 public async Task<Activity?> ParseActivity(HttpRequest httpRequest)
245 {
246 httpRequest.EnableBuffering();
247
248 if (httpRequest.Body.CanSeek)
249 {
250 // reset the stream position to the beginning in case it was read before
251 httpRequest.Body.Position = 0;
252 }
253
254 using StreamReader sr = new(httpRequest.Body);
255 var body = await sr.ReadToEndAsync();
256 Activity? activity = JsonSerializer.Deserialize<Activity>(body);
257
258 return activity;
259 }
260}