The top-most level of an Azure Function code should include a try/catch block to capture and log all errors so you can monitor the health of the
application effectively. In case a retry policy has been defined for your Azure Function, you should rethrow any errors that should result in a
retry.
Noncompliant code example
[FunctionName("HttpExample")]
public static async Task<IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req)
{
// Noncompliant
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
// do stuff
}
Compliant solution
[FunctionName("HttpExample")]
public static async Task<IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req)
{
try
{
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
// do stuff
}
catch (Exception ex)
{
// do stuff
}
}
