public static IActionResult Negotiate(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", "options", Route = "{hub}/negotiate")] HttpRequest req,
string hub,
TraceWriter log)
{
var(endpoint, accessKey) = ConnectionStringHelpers.ParseSignalRConnectionString();
var token = new JwtBuilder()
.WithAlgorithm(new HMACSHA256Algorithm())
.WithSecret(accessKey)
.AddClaim("exp", DateTimeOffset.UtcNow.AddHours(1).ToUnixTimeSeconds())
.AddClaim("aud", $"{endpoint}:5001/client/?hub={hub}")
.Build();
return(new OkObjectResult(new
{
url = $"{endpoint}:5001/client/?hub={hub}",
accessToken = token,
availableTransports = Enumerable.Empty <string>()
}));
}
private static async Task SignalRBroadcast(string target, params string[] arguments)
{
var(endpoint, accessKey) = ConnectionStringHelpers.ParseSignalRConnectionString();
var token = new JwtBuilder()
.WithAlgorithm(new HMACSHA256Algorithm())
.WithSecret(accessKey)
.AddClaim("exp", DateTimeOffset.UtcNow.AddHours(1).ToUnixTimeSeconds())
.AddClaim("aud", $"{endpoint}:5002/api/v1-preview/hub/notifications")
.Build();
var httpClient = new HttpClient
{
BaseAddress = new Uri($"{endpoint}:5002")
};
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
await httpClient.PostAsJsonAsync("/api/v1-preview/hub/notifications", new
{
target,
arguments
});
}