public async Task LetsEncryptRenewerTimerTriggerAsync([TimerTrigger("%LetsEncryptRenewerWebJobSettings:TimerSettings%", RunOnStartup = true, UseMonitor = true)] TimerInfo timerInfo, ILogger logger)
{
if (_letsEncryptConfig.IsJobEnabled)
{
PublishingCredentials publishingCredentials = null;
try
{
logger.LogInformation($"LetsEncryptRenewerWebJob started!");
logger.LogInformation($"Trying to obtain token...");
var token = await CredentialsManager.GetAccessToken(_letsEncryptConfig.AzureEnvironment);
logger.LogInformation($"Token obtain completed!");
logger.LogInformation($"Trying to obtain publishing credentials...");
publishingCredentials = await CredentialsManager.GetPublishingCredentials(_letsEncryptConfig.AzureEnvironment, token);
logger.LogInformation($"Publishing credentials were retrieved successfully!");
}
catch (Exception ex)
{
_appInsightLogger.TrackException(ex);
logger.LogInformation($"Failed to obtain credentials!");
}
if (publishingCredentials != null)
{
try
{
logger.LogInformation($"Proceed lets encrypt renewer api...");
var client = new HttpClient();
var renewUrl = string.Format(Constants.LetsEncryptApiUrlTemplate, _letsEncryptConfig.AzureEnvironment.WebAppName);
client.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "Basic " + Convert.ToBase64String(Encoding.UTF8.GetBytes($"{publishingCredentials.Properties.PublishingUserName}:{publishingCredentials.Properties.PublishingPassword}")));
var res = await client.PostAsync(renewUrl, new StringContent(JsonConvert.SerializeObject(_letsEncryptConfig, Formatting.None, new JsonSerializerSettings {
NullValueHandling = NullValueHandling.Ignore
}), Encoding.UTF8, "application/json"));
switch (res.StatusCode)
{
case HttpStatusCode.OK:
logger.LogInformation($"Lets encrypt certificate succsessfully renewed...");
break;
default:
logger.LogInformation($"Failed to renew certificate, something wrong with lets encrypt renewer api or configuration!");
var ex = new Exception(string.Format("Failed to renew certificate! : Response: {0}", await res.Content.ReadAsStringAsync()));
_appInsightLogger.TrackException(ex);
break;
}
}
catch (Exception ex)
{
_appInsightLogger.TrackException(ex);
logger.LogInformation($"Exception during lets encrypt renewer api call!");
}
}
}
else
{
logger.LogInformation($"Job disabled by settings!");
}
}
public static async Task<PublishingCredentials> GetPublishingCredentials(AzureEnvironment config, string token)
{
var requestUrl = string.Format(Constants.PublishingCredentialsUrlTemplate, config.SubscriptionId, config.ResourceGroupName, config.WebAppName);
var client = new HttpClient();
client.DefaultRequestHeaders.Add("Authorization", string.Format("Bearer {0}", token));
var result = await client.PostAsync(requestUrl, new StringContent("", Encoding.UTF8, "application/json"));
if (result.IsSuccessStatusCode)
{
var content = await result.Content.ReadAsStringAsync();
PublishingCredentials publishingCredentials = JsonConvert.DeserializeObject<PublishingCredentials>(content);
return publishingCredentials;
}
else
{
throw new InvalidOperationException("Failed to obtain publishing credentials!");
}
}
