public static void ValidateUrl(string url, bool isUserProvided = true)
{
try
{
var response = TryGetResponse(url);
response.Close();
}
catch (Exception)
{
if (isUserProvided)
{
throw new UserErrorException($"Unable to validate the URL for {UrlUtilities.GetFileName(url)}");
}
throw new DeploymentErrorException($"Deployment issue detected. Unable to validate the URL for {url}.");
}
}
public static Exception ProcessHttpRequestWebProtocolErrorException(Exception exception, string url)
{
if (!IsWebProtocolErrorException(exception))
{
return(exception);
}
string urlPath = UrlUtilities.GetPath(url);
var webException = (WebException)exception;
(string errorCode, string errorMessage) = GetWebExceptionMessage(webException);
// Expired URL is always a user error
if (errorMessage == "Request has expired")
{
return(new UserErrorException($"The provided URL for {urlPath} has expired."));
}
// Authentication error is always considered as a user error
if (AuthenticationErrorCodes.Contains(errorCode))
{
return(new UserErrorException($"Authentication error while reading from URL for {urlPath}."));
}
// Resource not exist error is always considered as a user error
if (ResourceNotExistErrorCodes.Contains(errorCode))
{
return(new UserErrorException($"An invalid URL for {urlPath} was specified."));
}
// Sometimes it is difficult to figure out whether the error is caused by the user or not.
// For example, the AccessDenied error code could be triggered by either incorrect credentials provided by the user, or network congestion while reading from S3.
// Therefore, such errors are treated as general exceptions.
// And we don't pass through the general error to end user to avoid possible confusion.
Logger.WriteLine($"The following error occurred while reading from {url}: {errorMessage}. Exception: {exception.Message}");
return(new WebException($"An error occurred while reading from the URL for {urlPath} ({exception.GetType()})"));
}
