public async Task <GravatarProxyResult> GetAvatarOrNullAsync(string username, int imageSize)
{
if (!_features.IsGravatarProxyEnabled())
{
return(null);
}
var user = _users.GetAll().FirstOrDefault(u => u.Username == username);
if (user == null)
{
_logger.LogWarning("Could not find an account with username {Username}", username);
return(null);
}
try
{
var emailAddress = user.EmailAddress ?? user.UnconfirmedEmailAddress;
var useEnSubdomain = _features.ProxyGravatarEnSubdomain();
var url = GravatarHelper.RawUrl(emailAddress, imageSize, useEnSubdomain);
// The response will be disposed when the caller disposes the content stream.
var client = _httpClientFactory.CreateClient(GravatarHttpClientName);
var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
response.EnsureSuccessStatusCode();
string contentType = null;
if (response.Content.Headers.TryGetValues(HttpContentTypeHeaderName, out var contentTypes))
{
contentType = contentTypes.FirstOrDefault();
}
return(new GravatarProxyResult(
await response.Content.ReadAsStreamAsync(),
contentType ?? HttpContentTypeDefaultValue));
}
catch (Exception e)
{
_logger.LogError(0, e, "Unable to fetch profile picture for user {Username}", username);
return(null);
}
}