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Add support for short Teams meeting URLs in ParseJoinURL #858

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0cf61b5
Add support for short Teams meeting URLs in ParseJoinURL
Feb 25, 2026
97381ea
Update Samples/PublicSamples/PsiBot/PsiBot/PsiBot.Service/Bot/BotServ…
samarthasthana Feb 25, 2026
de42f7c
Update Samples/PublicSamples/EchoBot/src/EchoBot/Bot/BotService.cs
samarthasthana Feb 25, 2026
85bafad
Update Samples/V1.0Samples/AksSamples(Deprecated)/teams-recording-bot…
samarthasthana Feb 25, 2026
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53 changes: 34 additions & 19 deletions Samples/Common/Sample.Common.Beta/Meetings/JoinInfo.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,37 +28,52 @@ public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
{
var decodedURL = WebUtility.UrlDecode(joinURL);

//// URL being needs to be in this format.
//// Long URL format:
//// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}

var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
var match = regex.Match(decodedURL);
if (!match.Success)
if (match.Success)
{
throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
{
var ctxt = (Context)new DataContractJsonSerializer(typeof(Context)).ReadObject(stream);
var chatInfo = new ChatInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
};

var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};

// meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);
return (chatInfo, meetingInfo);
}
}

using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
//// Short URL format:
//// https://teams.microsoft.com/meet/2414128301281?p=NzhDLMLT8b07DrkwkE
var shortUrlRegex = new Regex("https://teams\\.microsoft\\.com/meet/(?<meetingId>[^?]+)\\?p=(?<passcode>.+)");
var shortUrlMatch = shortUrlRegex.Match(decodedURL);
if (shortUrlMatch.Success)
{
var ctxt = (Context)new DataContractJsonSerializer(typeof(Context)).ReadObject(stream);
var chatInfo = new ChatInfo
var meetingInfo = new JoinMeetingIdMeetingInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
JoinMeetingId = shortUrlMatch.Groups["meetingId"].Value,
Passcode = shortUrlMatch.Groups["passcode"].Value,
};

var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};

// meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);
return (chatInfo, meetingInfo);
return (new ChatInfo(), meetingInfo);
}

throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
}

/// <summary>
Expand Down
53 changes: 34 additions & 19 deletions Samples/Common/Sample.Common.V1/Meetings/JoinInfo.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,37 +28,52 @@ public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
{
var decodedURL = WebUtility.UrlDecode(joinURL);

//// URL being needs to be in this format.
//// Long URL format:
//// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}

var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
var match = regex.Match(decodedURL);
if (!match.Success)
if (match.Success)
{
throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
{
var ctxt = (Context)new DataContractJsonSerializer(typeof(Context)).ReadObject(stream);
var chatInfo = new ChatInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
};

var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};

// meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);
return (chatInfo, meetingInfo);
}
}

using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
//// Short URL format:
//// https://teams.microsoft.com/meet/2414128301281?p=NzhDLMLT8b07DrkwkE
var shortUrlRegex = new Regex("https://teams\\.microsoft\\.com/meet/(?<meetingId>[^?]+)\\?p=(?<passcode>.+)");
var shortUrlMatch = shortUrlRegex.Match(decodedURL);
if (shortUrlMatch.Success)
{
var ctxt = (Context)new DataContractJsonSerializer(typeof(Context)).ReadObject(stream);
var chatInfo = new ChatInfo
var meetingInfo = new JoinMeetingIdMeetingInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
JoinMeetingId = shortUrlMatch.Groups["meetingId"].Value,
Passcode = shortUrlMatch.Groups["passcode"].Value,
};

var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};

// meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);
return (chatInfo, meetingInfo);
return (new ChatInfo(), meetingInfo);
}

throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
}

/// <summary>
Expand Down
53 changes: 34 additions & 19 deletions Samples/Common/Sample.Common/Meetings/JoinInfo.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -28,37 +28,52 @@ public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
{
var decodedURL = WebUtility.UrlDecode(joinURL);

//// URL being needs to be in this format.
//// Long URL format:
//// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}

var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
var match = regex.Match(decodedURL);
if (!match.Success)
if (match.Success)
{
throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
{
var ctxt = (Context)new DataContractJsonSerializer(typeof(Context)).ReadObject(stream);
var chatInfo = new ChatInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
};

var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};
meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);

return (chatInfo, meetingInfo);
}
}

using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
//// Short URL format:
//// https://teams.microsoft.com/meet/2414128301281?p=NzhDLMLT8b07DrkwkE
var shortUrlRegex = new Regex("https://teams\\.microsoft\\.com/meet/(?<meetingId>[^?]+)\\?p=(?<passcode>.+)");
var shortUrlMatch = shortUrlRegex.Match(decodedURL);
if (shortUrlMatch.Success)
{
var ctxt = (Context)new DataContractJsonSerializer(typeof(Context)).ReadObject(stream);
var chatInfo = new ChatInfo
var meetingInfo = new JoinMeetingIdMeetingInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
JoinMeetingId = shortUrlMatch.Groups["meetingId"].Value,
Passcode = shortUrlMatch.Groups["passcode"].Value,
};

var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};
meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);

return (chatInfo, meetingInfo);
return (new ChatInfo(), meetingInfo);
}

throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
}

/// <summary>
Expand Down
12 changes: 11 additions & 1 deletion Samples/PublicSamples/EchoBot/src/EchoBot/Bot/BotService.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -194,7 +194,17 @@ public async Task<ICall> JoinCallAsync(JoinCallBody joinCallBody)

var (chatInfo, meetingInfo) = JoinInfo.ParseJoinURL(joinCallBody.JoinUrl);

var tenantId = (meetingInfo as OrganizerMeetingInfo).Organizer.GetPrimaryIdentity().GetTenantId();
var tenantId =
joinCallBody.TenantId ??
(meetingInfo as OrganizerMeetingInfo)?.Organizer?.GetPrimaryIdentity()?.GetTenantId();

if (string.IsNullOrWhiteSpace(tenantId))
{
throw new HttpRequestException(
"TenantId could not be resolved from the join URL or request body.",
null,
HttpStatusCode.BadRequest);
}
var mediaSession = this.CreateLocalMediaSession();

var joinParams = new JoinMeetingParameters(chatInfo, meetingInfo, mediaSession)
Expand Down
8 changes: 8 additions & 0 deletions Samples/PublicSamples/EchoBot/src/EchoBot/Models/JoinCallBody.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,14 @@ public class JoinCallBody
/// <value>The join URL.</value>
public string JoinUrl { get; set; }

/// <summary>
/// Gets or sets the tenant id.
/// Required when using short meeting URLs (e.g. https://teams.microsoft.com/meet/...).
/// The tenant id cannot be inferred from short URLs and must be provided separately.
/// </summary>
/// <value>The tenant id.</value>
public string? TenantId { get; set; }

/// <summary>
/// Gets or sets the display name.
/// Teams client does not allow changing of ones own display name.
Expand Down
61 changes: 38 additions & 23 deletions Samples/PublicSamples/EchoBot/src/EchoBot/Models/JoinInfo.cs
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -43,40 +43,55 @@ public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)

var decodedURL = WebUtility.UrlDecode(joinURL);

//// Long URL format:
var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
var match = regex.Match(decodedURL);
if (!match.Success)
if (match.Success)
{
throw new ArgumentException($"Join URL cannot be parsed: {joinURL}", nameof(joinURL));
}
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
{
var ctxt = (Meeting)new DataContractJsonSerializer(typeof(Meeting)).ReadObject(stream);

using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(match.Groups["context"].Value)))
{
var ctxt = (Meeting)new DataContractJsonSerializer(typeof(Meeting)).ReadObject(stream);
if (string.IsNullOrEmpty(ctxt.Tid))
{
throw new ArgumentException("Join URL is invalid: missing Tid", nameof(joinURL));
}

if (string.IsNullOrEmpty(ctxt.Tid))
{
throw new ArgumentException("Join URL is invalid: missing Tid", nameof(joinURL));
}
var chatInfo = new ChatInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
};

var chatInfo = new ChatInfo
{
ThreadId = match.Groups["thread"].Value,
MessageId = match.Groups["message"].Value,
ReplyChainMessageId = ctxt.MessageId,
};
var meetingInfo = new OrganizerMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
};
meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);

return (chatInfo, meetingInfo);
}
}

var meetingInfo = new OrganizerMeetingInfo
//// Short URL format: https://teams.microsoft.com/meet/<meetingId>?p=<passcode>
var shortUrlRegex = new Regex("https://teams\\.microsoft\\.com/meet/(?<meetingId>[^?]+)\\?p=(?<passcode>.+)");
var shortUrlMatch = shortUrlRegex.Match(decodedURL);
if (shortUrlMatch.Success)
{
var meetingInfo = new JoinMeetingIdMeetingInfo
{
Organizer = new IdentitySet
{
User = new Identity { Id = ctxt.Oid },
},
JoinMeetingId = shortUrlMatch.Groups["meetingId"].Value,
Passcode = shortUrlMatch.Groups["passcode"].Value,
};
meetingInfo.Organizer.User.SetTenantId(ctxt.Tid);

return (chatInfo, meetingInfo);
return (new ChatInfo(), meetingInfo);
}
Comment on lines +85 to 92
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Copilot AI Feb 25, 2026

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For short meeting URLs, this returns an empty ChatInfo. In EchoBot, JoinCallAsync later uses joinParams.ChatInfo.ThreadId as a dictionary key; if ThreadId is null/empty this will throw (ArgumentNullException) or cause collisions. Consider returning a non-null ThreadId surrogate (if supported) or adjusting the bot’s call tracking logic for JoinMeetingIdMeetingInfo joins.

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@samarthasthana samarthasthana Feb 25, 2026

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@copilot open a new pull request to apply changes based on this feedback


throw new ArgumentException($"Join URL cannot be parsed: {joinURL}", nameof(joinURL));
}
}
}
8 changes: 8 additions & 0 deletions Samples/PublicSamples/PsiBot/PsiBot/PsiBot.Model/Models/JoinCallBody.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,14 @@ public class JoinCallBody
/// <value>The join URL.</value>
public string JoinURL { get; set; }

/// <summary>
/// Gets or sets the tenant id.
/// Required when using short meeting URLs (e.g. https://teams.microsoft.com/meet/...).
/// The tenant id cannot be inferred from short URLs and must be provided separately.
/// </summary>
/// <value>The tenant id.</value>
public string TenantId { get; set; }

/// <summary>
/// Gets or sets the display name.
/// Teams client does not allow changing of ones own display name.
Expand Down
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