internal static string GenerateSignalNowKey(string userName, string companyOrTenant, string groupOrTeam, string signalNowKey)
{
string nameHash1 = SignalRGroupUtils.GetNameHash(
SignalRGroupUtils.GetUserGroupId(_hashSecuritySeed, companyOrTenant, groupOrTeam, userName),
signalNowKey);
string nameHash2 = SignalRGroupUtils.GetNameHash(nameHash1, signalNowKey);
return(nameHash1 + nameHash2);
}
public string GenerateAccessToken(string audience, string userId, TimeSpan?lifetime = null)
{
IEnumerable <Claim> claims = null;
if (userId != null)
{
claims = new[]
{
new Claim(ClaimTypes.GivenName, userId),
new Claim(ClaimTypes.NameIdentifier, SignalRGroupUtils.GetNameHash(userId, AccessKey))
};
}
return(GenerateAccessTokenInternal(audience, claims, lifetime ?? TimeSpan.FromHours(1)));
}
public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest req,
ILogger log)
{
var authToken = req.Headers["authtoken"].ToString(); // SignalNow authentication token received from GetMessageToken
var sendTo = req.Headers["sendto"].ToString().ToLowerInvariant(); // SignalNow username or group name
var userOrGroup = req.Headers["userorgroup"].ToString(); // Message's recipient - "user" or "group"
var messageType = req.Headers["messagetype"].ToString(); // Message type (any string, defined by the signaling protocol)
string payload = string.Empty;
// Message payload may be passed in "payload" header or, if there is no such header, via request body
if (req.Headers.ContainsKey("payload"))
{
payload = req.Headers["payload"].ToString();
}
else
{
// If message pack was used to create playload, there should be "withmessagepack" header.
// If its value is "lz", then payload is compressed with MessagePack.LZ4MessagePackSerializer.
// We don't use req.ContentType because of ambiguity between application/x-msgpack and application/msgpack
// https://github.com/msgpack/msgpack/issues/194 (plus we also need to differentiate between uncompressed and compressed)
if (req.Headers.ContainsKey("withmessagepack"))
{
var mpValue = req.Headers["withmessagepack"].ToString();
bool useLZ = string.Equals("lz", mpValue, StringComparison.InvariantCultureIgnoreCase);
int capacity = 0;
if (req.Body.Length >= 0 && req.Body.Length <= int.MaxValue)
{
capacity = (int)req.Body.Length;
}
using (var ms = new MemoryStream(capacity))
{
await req.Body.CopyToAsync(ms);
byte[] messageData = ms.ToArray();
payload = useLZ ?
MessagePack.LZ4MessagePackSerializer.ToJson(messageData)
: MessagePack.MessagePackSerializer.ToJson(messageData);
}
}
else
{
using (var sr = new StreamReader(req.Body))
{
payload = await sr.ReadToEndAsync();
}
}
}
string userIdHash, userId;
ServiceUtils utils = new ServiceUtils(ConfigUtils.GetSignalRConnection());
if (!utils.ParseAndValidateToken(authToken, out userIdHash, out userId, null))
{
log.LogError($"Invalid authentication token ({authToken})");
return(new UnauthorizedResult());
}
if (!SignalRGroupUtils.CanSendMessage(userId, sendTo))
{
log.LogError($"{userId} is not allowed to send messages to {sendTo}");
return(new BadRequestObjectResult(new { message = $"{userId} is not allowed to send messages to {sendTo}" }));
}
var hubName = ConfigUtils.GetHubName();
var sendToHash = SignalRGroupUtils.GetNameHash(sendTo, utils.AccessKey);
string url = string.Equals(userOrGroup, "group", StringComparison.InvariantCultureIgnoreCase) ?
$"{utils.Endpoint}/api/v1/hubs/{hubName}/groups/{sendToHash}" :
$"{utils.Endpoint}/api/v1/hubs/{hubName}/users/{sendToHash}";
string sendToken = utils.GenerateAccessToken(url, userId, TimeSpan.FromMinutes(1));
PayloadMessage message = new PayloadMessage()
{
Target = "SIGNAL",
Arguments = new[]
{
userId,
messageType,
payload
}
};
bool msgSent = false;
string errMessage = string.Empty;
HttpStatusCode httpStatus = HttpStatusCode.OK;
string errPhrase = string.Empty;
string errContent = string.Empty;
for (int i = 0; i < maxTries; i++)
{
try
{
using (var request = new HttpRequestMessage(HttpMethod.Post, url))
{
request.Version = System.Net.HttpVersion.Version20;
request.Headers.Authorization =
new AuthenticationHeaderValue("Bearer", sendToken);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Content = new StringContent(JsonConvert.SerializeObject(message, Formatting.None), Encoding.UTF8, "application/json");
using (var requestResult = await SignalRHttpClient.HttpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead))
{
if (requestResult.IsSuccessStatusCode)
{
msgSent = true;
log.LogInformation($"{userId} sent a message to {sendTo}");
}
else
{
errPhrase = requestResult.ReasonPhrase;
if (requestResult.Content != null)
{
errContent = await requestResult.Content.ReadAsStringAsync();
}
log.LogError($"Cannot send signal. Error {requestResult.StatusCode}: {requestResult.ReasonPhrase}");
}
}
}
}
catch (Exception ex)
{
errMessage = ex.Message;
errPhrase = ex.GetType().Name;
errContent = ex.Message;
log.LogError($"Exception when sending a SignalR request: {errMessage}");
}
if (msgSent)
{
break;
}
}
if (msgSent)
{
return((ActionResult) new OkResult());
}
else
{
return(new BadRequestObjectResult(
new { message = $"Cannot send signal. Error {httpStatus}: {errPhrase} ({errContent})" }
));
}
}
public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest req,
ILogger log)
{
var authToken = req.Headers["authtoken"].ToString();
ServiceUtils utils = new ServiceUtils(ConfigUtils.GetSignalRConnection());
string userIdHash = string.Empty;
string userId = string.Empty;
if (!utils.ParseAndValidateToken(authToken, out userIdHash, out userId, null))
{
log.LogError($"GetMessageToken: Invalid authentication token ({authToken})");
return(new BadRequestObjectResult("Invalid authentication token"));
}
TimeSpan messageTokenLifetime = TimeSpan.FromMinutes(UInt64.Parse(ConfigUtils.GetAuthTokenLifetimeMinutes()));
var messageToken = utils.GenerateAccessToken(utils.Endpoint,
userId,
messageTokenLifetime);
string errorMessage = string.Empty;
string userName;
string company;
string team;
string authService;
string deviceId;
SignalRGroupUtils.ParseUserId(userId, out userName, out deviceId, out company, out team, out authService);
var hubName = ConfigUtils.GetHubName();
var groups = SignalRGroupUtils.GetUserGroups(authService, company, team, userName, deviceId);
foreach (var group in groups)
{
var groupHash = SignalRGroupUtils.GetNameHash(group, utils.AccessKey);
var url = $"{utils.Endpoint}/api/v1/hubs/{hubName}/groups/{groupHash}/users/{userIdHash}";
var requestToken = utils.GenerateAccessToken(url, userId, TimeSpan.FromMinutes(1));
using (var request = new HttpRequestMessage(HttpMethod.Put, url))
{
request.Version = System.Net.HttpVersion.Version20;
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", requestToken);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
using (var httpResult = await SignalRHttpClient.HttpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead))
{
if (!httpResult.IsSuccessStatusCode)
{
var body = await httpResult.Content.ReadAsStringAsync();
errorMessage = $"Cannot add user {userId} ({userIdHash}) to group {group} ({groupHash}). Code: {httpResult.StatusCode}, Message: {httpResult.ReasonPhrase}, Body: {body}";
log.LogError(errorMessage);
break;
}
}
}
}
return(string.IsNullOrEmpty(errorMessage)
? (ActionResult) new OkObjectResult(messageToken)
: new BadRequestObjectResult(new { message = errorMessage }));
}