public Func <Stream, Stream> GetEncoder(HttpHeaderValueCollection <StringWithQualityHeaderValue> list)
{
if (list.IsNotNullOrEmpty())
{
StringWithQualityHeaderValue headerValue = list.OrderByDescending(e => e.Quality ?? 1.0D)
.Where(e => !e.Quality.HasValue || e.Quality.Value > 0.0D)
.FirstOrDefault(e => supported.Keys
.Contains(e.Value, StringComparer.OrdinalIgnoreCase));
// Case 1: We can support what client has asked for
if (headerValue.IsNotNull())
{
return(GetStreamForSchema(headerValue.Value));
}
// Case 2: Client is okay to accept any thing we support except
// the ones explicitly specified as not preferred by setting q=0
if (list.Any(e => e.Value == "*" && (!e.Quality.HasValue || e.Quality.Value > 0.0D)))
{
string encoding = supported.Keys.Where(se =>
!list.Any(e =>
e.Value.Equals(se, StringComparison.OrdinalIgnoreCase) &&
e.Quality.HasValue &&
e.Quality.Value == 0.0D))
.FirstOrDefault();
if (encoding.IsNotNull())
{
return(GetStreamForSchema(encoding));
}
}
// Case 3: Client specifically refusing identity
if (list.Any(e => e.Value.Equals(IDENTITY, StringComparison.OrdinalIgnoreCase) &&
e.Quality.HasValue && e.Quality.Value == 0.0D))
{
throw new NegotiationFailedException();
}
// Case 4: Client is not willing to accept one of the encodings
// we support and is not willing to accept identity
if (list.Any(e => e.Value == "*" &&
(e.Quality.HasValue || e.Quality.Value == 0.0D)))
{
if (!list.Any(e => e.Value.Equals(IDENTITY, StringComparison.OrdinalIgnoreCase)))
{
throw new NegotiationFailedException();
}
}
}
// Settle for the default, which is no transformation whatsoever
return(null);
}
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
HttpHeaderValueCollection <StringWithQualityHeaderValue> acceptedLanguages = request.Headers.AcceptLanguage;
if (acceptedLanguages.IsNotNullOrEmpty())
{
StringWithQualityHeaderValue headerValue = acceptedLanguages.OrderByDescending(e => e.Quality ?? 1.0D)
.Where(e => !e.Quality.HasValue || e.Quality.Value > 0.0D)
.FirstOrDefault(e => supportedCultures.Contains(e.Value, StringComparer.OrdinalIgnoreCase));
string culture = null;
// Case 1: We can support what client has asked for
if (headerValue.IsNotNull())
{
culture = headerValue.Value;
}
// Case 2: Client is okay to accept any thing we support except
// the ones explicitly specified as not preferred by setting q=0
else if (acceptedLanguages.Any(e => e.Value == "*" && (!e.Quality.HasValue || e.Quality.Value > 0.0D)))
{
culture = supportedCultures.Where(sc =>
!acceptedLanguages.Any(e =>
e.Value.Equals(sc, StringComparison.OrdinalIgnoreCase) &&
e.Quality.HasValue &&
e.Quality.Value == 0.0D))
.FirstOrDefault();
}
if (culture.IsNotNull())
{
Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo(culture);
Thread.CurrentThread.CurrentCulture = Thread.CurrentThread.CurrentUICulture;
}
}
return(await base.SendAsync(request, cancellationToken));
}