private void AddHeaders(HttpResponse httpResponse, RendertronOptions options, bool isPrerendered)
{
if (options.AddVeryUserAgentHeader)
{
httpResponse.Headers.Append(HeaderNames.Vary, "User-Agent");
}
if (options.AddPrerenderedHeader)
{
httpResponse.Headers["Prerendered"] = new string[] { isPrerendered ? "1" : "0" };
}
}
private void AddHttpCacheHeaders(HttpResponse httpResponse, RendertronOptions options)
{
if (options.HttpCacheMaxAge > TimeSpan.Zero)
{
httpResponse.GetTypedHeaders().CacheControl = new CacheControlHeaderValue()
{
Public = true,
MaxAge = options.HttpCacheMaxAge
};
}
}
private void AddHttpCacheHeaders(HttpResponse httpResponse, RendertronOptions options)
{
if (options.HttpCacheMaxAge > TimeSpan.Zero)
{
httpResponse.GetTypedHeaders().CacheControl = new CacheControlHeaderValue()
{
Public = true,
MaxAge = options.HttpCacheMaxAge
};
httpResponse.Headers[HeaderNames.Vary] = new string[] { "Accept-Encoding" };
}
}
private async Task InvokeRender(HttpContext context, RendertronOptions options)
{
var cancellationToken = context.RequestAborted;
var response = await _rendertronClient
.RenderAsync(context.Request.GetDisplayUrl(), cancellationToken)
.ConfigureAwait(false);
AddHttpCacheHeaders(context.Response, options);
context.Response.StatusCode = (int)response.StatusCode;
await context.Response.WriteAsync(response.Result, cancellationToken);
}
private bool IsNeedRender(HttpContext context, RendertronOptions options)
{
var userAgent = context.Request.Headers["User-agent"].ToString().ToLowerInvariant();
var path = context.Request.Path.Value;
if (options.ExtensionBlacklist.Any(ext => path.EndsWith("." + ext)))
{
return(false);
}
if (options.PathPrefixBlacklist.Any(prefix => path.StartsWith(prefix)))
{
return(false);
}
return(options.UserAgents.Any(x => userAgent.Contains(x.ToLowerInvariant())));
}
private bool IsNeedRender(HttpContext context, RendertronOptions options)
{
var userAgent = context.Request.Headers["User-agent"].ToString().ToLowerInvariant();
return(options.UserAgents.Any(x => userAgent.Contains(x.ToLowerInvariant())));
}
