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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.Recipient = reference.User;
93 activity.ChannelId = reference.ChannelId;
94
95 if (activity.Id is not null && !activity.IsStreaming)
96 {
97 await client
98 .Conversations
99 .Activities
100 .UpdateAsync(reference.Conversation.Id, activity.Id, activity);
101
102 return activity;
103 }
104
105 var res = await client
106 .Conversations
107 .Activities
108 .CreateAsync(reference.Conversation.Id, activity);
109
110 activity.Id = res?.Id;
111 return activity;
112 }
113
114 public IStreamer CreateStream(Api.ConversationReference reference, CancellationToken cancellationToken = default)
115 {
116 return new Stream()
117 {
118 Send = async activity =>
119 {
120 var res = await Send(activity, reference, cancellationToken);
121 return res;
122 }
123 };
124 }
125
126 public async Task<Response> Do(ActivityEvent @event, CancellationToken cancellationToken = default)
127 {
128 try
129 {
130 var @out = await Events(
131 this,
132 "activity",
133 @event,
134 cancellationToken
135 );
136
137 var res = (Response?)@out ?? throw new Exception("expected activity response");
138 Logger.Debug(res);
139 return res;
140 }
141 catch (Exception ex)
142 {
143 Logger.Error(ex);
144 await Events(
145 this,
146 "error",
147 new ErrorEvent() { Exception = ex },
148 cancellationToken
149 );
150
151 return new Response(System.Net.HttpStatusCode.InternalServerError, ex.ToString());
152 }
153 }
154
155 public async Task<IResult> Do(HttpContext httpContext, CancellationToken cancellationToken = default)
156 {
157 try
158 {
159 var request = httpContext.Request;
160 var token = ExtractToken(request);
161 var activity = await ParseActivity(request);
162
163 if (activity is null)
164 {
165 return Results.BadRequest("Missing activity");
166 }
167
168 var data = new Dictionary<string, object?>
169 {
170 ["Request.TraceId"] = httpContext.TraceIdentifier
171 };
172
173 foreach (var pair in httpContext.Items)
174 {
175 var key = pair.Key.ToString();
176
177 if (key is null) continue;
178
179 data[key] = pair.Value;
180 }
181
182 var res = await Do(new ActivityEvent()
183 {
184 Token = token,
185 Activity = activity,
186 Extra = data,
187 Services = httpContext.RequestServices
188 }, cancellationToken);
189
190 // convert response metadata to headers
191 foreach (var (key, value) in res.Meta)
192 {
193 var str = value?.ToString();
194 if (string.IsNullOrEmpty(str)) continue;
195 httpContext.Response.Headers.Append($"X-Teams-{char.ToUpper(key[0]) + key[1..]}", str);
196 }
197
198 return Results.Json(
199 res.Body,
200 _jsonSerializerOptions,
201 contentType: null,
202 statusCode: (int)res.Status
203 );
204 }
205 catch (Exception ex)
206 {
207 Logger.Error(ex);
208 await Events(
209 this,
210 "error",
211 new ErrorEvent() { Exception = ex },
212 cancellationToken
213 );
214
215 return Results.Problem(detail: ex.Message, statusCode: 500);
216 }
217 }
218
219 public JsonWebToken ExtractToken(HttpRequest httpRequest)
220 {
221 var authHeader = httpRequest.Headers.Authorization.FirstOrDefault() ?? throw new UnauthorizedAccessException();
222 return new JsonWebToken(authHeader.Replace("Bearer ", ""));
223 }
224
225 public async Task<Activity?> ParseActivity(HttpRequest httpRequest)
226 {
227 httpRequest.EnableBuffering();
228
229 if (httpRequest.Body.CanSeek)
230 {
231 // reset the stream position to the beginning in case it was read before
232 httpRequest.Body.Position = 0;
233 }
234
235 using StreamReader sr = new(httpRequest.Body);
236 var body = await sr.ReadToEndAsync();
237 Activity? activity = JsonSerializer.Deserialize<Activity>(body);
238
239 return activity;
240 }
241}