/// <summary>
/// Handles HTTP Caching Headers and checks if the client has the
/// latest version in cache.
/// </summary>
/// <param name="context">The HTTP Cache</param>
/// <param name="site">The current site</param>
/// <param name="content">The current content</param>
/// <param name="expires">How many minutes the cache should be valid</param>
/// <returns>If the client has the latest version</returns>
public bool HandleCache(HttpContext context, Site site, RoutedContentBase content, int expires)
{
var headers = context.Response.GetTypedHeaders();
if (expires > 0 && content.Published.HasValue)
{
_logger?.LogDebug($"Setting HTTP Cache for [{ content.Slug }]");
var lastModified = !site.ContentLastModified.HasValue || content.LastModified > site.ContentLastModified
? content.LastModified : site.ContentLastModified.Value;
var etag = Utils.GenerateETag(content.Id.ToString(), lastModified);
headers.CacheControl = new CacheControlHeaderValue
{
Public = true,
MaxAge = TimeSpan.FromMinutes(expires),
};
headers.ETag = new EntityTagHeaderValue(etag);
headers.LastModified = lastModified;
if (HttpCaching.IsCached(context, etag, lastModified))
{
_logger?.LogInformation("Client has current version. Setting NotModified");
context.Response.StatusCode = 304;
return(true);
}
}
else
{
_logger?.LogDebug($"Setting HTTP NoCache for [{ content.Slug }]");
headers.CacheControl = new CacheControlHeaderValue
{
NoCache = true
};
}
return(false);
}
/// <summary>
/// Invokes the middleware.
/// </summary>
/// <param name="context">The current http context</param>
/// <returns>An async task</returns>
public override async Task Invoke(HttpContext context)
{
if (!IsHandled(context) && !context.Request.Path.Value.StartsWith("/manager/assets/"))
{
var url = context.Request.Path.HasValue ? context.Request.Path.Value : "";
var response = PageRouter.Invoke(api, url);
if (response != null)
{
if (logger != null)
{
logger.LogInformation($"Found page\n Route: {response.Route}\n Params: {response.QueryString}");
}
if (string.IsNullOrWhiteSpace(response.RedirectUrl))
{
using (var config = new Config(api)) {
var headers = context.Response.GetTypedHeaders();
if (config.CacheExpiresPages > 0)
{
if (logger != null)
{
logger.LogInformation("Caching enabled. Setting MaxAge, LastModified & ETag");
}
headers.CacheControl = new CacheControlHeaderValue()
{
Public = true,
MaxAge = TimeSpan.FromMinutes(config.CacheExpiresPages),
};
headers.Headers["ETag"] = response.CacheInfo.EntityTag;
headers.LastModified = response.CacheInfo.LastModified;
}
else
{
headers.CacheControl = new CacheControlHeaderValue()
{
NoCache = true
};
}
}
if (HttpCaching.IsCached(context, response.CacheInfo))
{
if (logger != null)
{
logger.LogInformation("Client has current version. Returning NotModified");
}
context.Response.StatusCode = 304;
return;
}
else
{
context.Request.Path = new PathString(response.Route);
if (context.Request.QueryString.HasValue)
{
context.Request.QueryString = new QueryString(context.Request.QueryString.Value + "&" + response.QueryString);
}
else
{
context.Request.QueryString = new QueryString("?" + response.QueryString);
}
}
}
else
{
if (logger != null)
{
logger.LogInformation($"Redirecting to url: {response.RedirectUrl}");
}
context.Response.Redirect(response.RedirectUrl, response.RedirectType == Data.RedirectType.Permanent);
return;
}
}
}
await next.Invoke(context);
}
/// <summary>
/// Invokes the middleware.
/// </summary>
/// <param name="context">The current http context</param>
/// <param name="api">The current api</param>
/// <returns>An async task</returns>
public override async Task Invoke(HttpContext context, IApi api, IApplicationService service)
{
if (!IsHandled(context) && !context.Request.Path.Value.StartsWith("/manager/assets/"))
{
var url = context.Request.Path.HasValue ? context.Request.Path.Value : "";
var siteId = service.Site.Id;
var response = await PostRouter.InvokeAsync(api, url, siteId);
if (response != null)
{
_logger?.LogInformation($"Found post\n Route: {response.Route}\n Params: {response.QueryString}");
service.PageId = response.PageId;
using (var config = new Config(api))
{
var headers = context.Response.GetTypedHeaders();
var expires = config.CacheExpiresPosts;
// Only use caching for published posts
if (response.IsPublished && expires > 0)
{
_logger?.LogInformation("Caching enabled. Setting MaxAge, LastModified & ETag");
headers.CacheControl = new CacheControlHeaderValue
{
Public = true,
MaxAge = TimeSpan.FromMinutes(expires),
};
headers.ETag = new EntityTagHeaderValue(response.CacheInfo.EntityTag);
headers.LastModified = response.CacheInfo.LastModified;
}
else
{
headers.CacheControl = new CacheControlHeaderValue
{
NoCache = true
};
}
}
if (HttpCaching.IsCached(context, response.CacheInfo))
{
_logger?.LogInformation("Client has current version. Returning NotModified");
context.Response.StatusCode = 304;
return;
}
else
{
context.Request.Path = new PathString(response.Route);
if (context.Request.QueryString.HasValue)
{
context.Request.QueryString = new QueryString(context.Request.QueryString.Value + "&" + response.QueryString);
}
else
{
context.Request.QueryString = new QueryString("?" + response.QueryString);
}
}
}
}
await _next.Invoke(context);
}
/// <summary>
/// Invokes the middleware.
/// </summary>
/// <param name="context">The current http context</param>
/// <returns>An async task</returns>
public override async Task Invoke(HttpContext context)
{
if (!IsHandled(context) && !context.Request.Path.Value.StartsWith("/manager/assets/"))
{
var url = context.Request.Path.HasValue ? context.Request.Path.Value : "";
var authorized = true;
var response = PostRouter.Invoke(api, url, context.Request.Host.Host);
if (response != null)
{
if (logger != null)
{
logger.LogInformation($"Found post\n Route: {response.Route}\n Params: {response.QueryString}");
}
if (!response.IsPublished)
{
if (!context.User.HasClaim(Security.Permission.PostPreview, Security.Permission.PostPreview))
{
if (logger != null)
{
logger.LogInformation($"User not authorized to preview unpublished posts");
}
authorized = false;
}
}
if (authorized)
{
using (var config = new Config(api)) {
var headers = context.Response.GetTypedHeaders();
// Only use caching for published posts
if (response.IsPublished && config.CacheExpiresPosts > 0)
{
if (logger != null)
{
logger.LogInformation("Caching enabled. Setting MaxAge, LastModified & ETag");
}
headers.CacheControl = new CacheControlHeaderValue()
{
Public = true,
MaxAge = TimeSpan.FromMinutes(config.CacheExpiresPosts),
};
headers.Headers["ETag"] = response.CacheInfo.EntityTag;
headers.LastModified = response.CacheInfo.LastModified;
}
else
{
headers.CacheControl = new CacheControlHeaderValue()
{
NoCache = true
};
}
}
if (HttpCaching.IsCached(context, response.CacheInfo))
{
if (logger != null)
{
logger.LogInformation("Client has current version. Returning NotModified");
}
context.Response.StatusCode = 304;
return;
}
else
{
context.Request.Path = new PathString(response.Route);
if (context.Request.QueryString.HasValue)
{
context.Request.QueryString = new QueryString(context.Request.QueryString.Value + "&" + response.QueryString);
}
else
{
context.Request.QueryString = new QueryString("?" + response.QueryString);
}
}
}
}
}
await next.Invoke(context);
}
/// <summary>
/// Invokes the middleware.
/// </summary>
/// <param name="context">The current http context</param>
/// <param name="api">The current api</param>
/// <returns>An async task</returns>
public override async Task Invoke(HttpContext context, IApi api, IApplicationService service)
{
if (!IsHandled(context) && !context.Request.Path.Value.StartsWith("/manager/assets/"))
{
var url = context.Request.Path.HasValue ? context.Request.Path.Value : "";
var siteId = service.Site.Id;
var authorized = true;
var draft = IsDraft(context);
var response = await PageRouter.InvokeAsync(api, url, siteId);
if (response != null)
{
_logger?.LogInformation($"Found page\n Route: {response.Route}\n Params: {response.QueryString}");
if (!response.IsPublished)
{
if (!context.User.HasClaim(Security.Permission.PagePreview, Security.Permission.PagePreview))
{
_logger?.LogInformation($"User not authorized to preview unpublished page");
authorized = false;
}
}
if (authorized)
{
if (string.IsNullOrWhiteSpace(response.RedirectUrl))
{
service.PageId = response.PageId;
using (var config = new Config(api))
{
var headers = context.Response.GetTypedHeaders();
var expires = config.CacheExpiresPages;
// Only use caching for published pages
if (response.IsPublished && expires > 0 && !draft)
{
_logger?.LogInformation("Caching enabled. Setting MaxAge, LastModified & ETag");
headers.CacheControl = new CacheControlHeaderValue
{
Public = true,
MaxAge = TimeSpan.FromMinutes(expires),
};
headers.ETag = new EntityTagHeaderValue(response.CacheInfo.EntityTag);
headers.LastModified = response.CacheInfo.LastModified;
}
else
{
headers.CacheControl = new CacheControlHeaderValue
{
NoCache = true
};
}
}
if (HttpCaching.IsCached(context, response.CacheInfo))
{
_logger?.LogInformation("Client has current version. Returning NotModified");
context.Response.StatusCode = 304;
return;
}
else
{
context.Request.Path = new PathString(response.Route);
if (context.Request.QueryString.HasValue)
{
context.Request.QueryString = new QueryString(context.Request.QueryString.Value + "&" + response.QueryString);
}
else
{
context.Request.QueryString = new QueryString("?" + response.QueryString);
}
}
}
else
{
_logger?.LogInformation($"Redirecting to url: {response.RedirectUrl}");
context.Response.Redirect(response.RedirectUrl, response.RedirectType == RedirectType.Permanent);
return;
}
}
}
}
await _next.Invoke(context);
}
