public void Log(string message)
{
_logHandler.Write(message);
}
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
HttpRequestMessage clonedRequest = null;
string token = null;
// See if the request has an authorize header
var auth = request.Headers.Authorization;
if (auth != null)
{
// Authorization required! Get the token from saved settings if available
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Authorization required with scheme {auth.Scheme}");
}
token = GetToken();
if (!string.IsNullOrWhiteSpace(token))
{
// We have one, then clone the request in case we need to re-issue it with a refreshed token
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Saved token will be used");
}
clonedRequest = await this.CloneHttpRequestMessageAsync(request);
}
else
{
// Refresh the token
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: No token saved yet. Refreshing token...");
}
token = await this.RefreshTokenAsync(request).ConfigureAwait(false);
}
// Set the authentication header
request.Headers.Authorization = new AuthenticationHeaderValue(auth.Scheme, token);
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Authorization header has been set");
}
}
// Send the request
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Sending request with authorization header...");
}
var response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
// Check if we get an Unauthorized response with token from settings
if (response.StatusCode == HttpStatusCode.Unauthorized && auth != null && clonedRequest != null)
{
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Unauthorized !");
}
// Refresh the token
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Refreshing token...");
}
token = await this.RefreshTokenAsync(request).ConfigureAwait(false);
// Set the authentication header with refreshed token
clonedRequest.Headers.Authorization = new AuthenticationHeaderValue(auth.Scheme, token);
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Authorization header has been set with refreshed token");
}
// Send the request
if (_apizrOptions.ApizrVerbosity >= ApizrLogLevel.Low)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Sending request again but with refreshed authorization header...");
}
response = await base.SendAsync(clonedRequest, cancellationToken).ConfigureAwait(false);
}
// Clear the token if unauthorized
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
token = null;
if (_apizrOptions.ApizrVerbosity >= ApizrLogLevel.Low)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Unauthorized ! Token has been cleared");
}
}
// Save the refreshed token if succeed or clear it if not
this.SetToken(token);
if (_apizrOptions.ApizrVerbosity == ApizrLogLevel.High)
{
_logHandler.Write($"Apizr - {_handlerFriendlyName}: Token saved");
}
return(response);
}