async Task <KFrameTrace> IFrameAsync(HttpRequest req, HttpResponse res, string remaining)
{
var trace = new KFrameTrace(KFrameTrace.TraceMethod.IFrame);
res.Clear();
var etag = req.Headers["If-None-Match"];
if (!string.IsNullOrEmpty(etag) && etag == "\"iframe\"")
{
res.StatusCode = trace.StatusCode = (int)HttpStatusCode.NotModified;
trace.FromETag = etag.ToString();
return(trace);
}
var result = (List <object>)(await _repository.GetIFrameAsync(trace));
trace.IFrames = result.Select(x => (long)((dynamic)x).frame).ToArray();
res.StatusCode = (int)HttpStatusCode.OK;
res.Headers.Add("Access-Control-Allow-Origin", "*");
res.ContentType = "application/json";
var typedHeaders = res.GetTypedHeaders();
typedHeaders.CacheControl = new CacheControlHeaderValue {
Public = true, MaxAge = trace.MaxAge = KFrameTiming.IFrameCacheMaxAge()
};
typedHeaders.Expires = trace.Expires = KFrameTiming.IFrameCacheExpires();
typedHeaders.ETag = new EntityTagHeaderValue("\"iframe\"");
trace.ETag = "\"iframe\"";
var json = JsonSerializer.Serialize(result);
await res.WriteAsync(json);
trace.ContentLength = res.ContentLength ?? json.Length;
return(trace);
}
async Task <KFrameTrace> ReinstallAsync(HttpRequest req, HttpResponse res, string remaining)
{
var trace = new KFrameTrace(KFrameTrace.TraceMethod.Clear);
await res.WriteAsync(await _repository.ReinstallAsync(remaining, trace));
return(trace);
}
/// <summary>
/// invoke as an asynchronous operation.
/// </summary>
/// <param name="context">The context.</param>
/// <returns>Task.</returns>
public async Task InvokeAsync(HttpContext context)
{
var req = context.Request; var res = context.Response;
if ((!string.IsNullOrEmpty(_options.RequestPath) && req.Path.StartsWithSegments(_options.RequestPath, StringComparison.OrdinalIgnoreCase, out var remaining)) ||
(!string.IsNullOrEmpty(_options.RequestSPath) && req.Path.StartsWithSegments(_options.RequestSPath, StringComparison.OrdinalIgnoreCase, out remaining)))
{
KFrameTrace trace = null;
if (remaining.StartsWithSegments("/i", StringComparison.OrdinalIgnoreCase, out var remaining2))
{
trace = await IFrameAsync(req, res, remaining2);
}
else if (remaining.StartsWithSegments("/p", StringComparison.OrdinalIgnoreCase, out remaining2))
{
trace = await PFrameAsync(req, res, remaining2);
}
else if (remaining.StartsWithSegments("/clear", StringComparison.OrdinalIgnoreCase, out remaining2))
{
trace = await ClearAsync(req, res, remaining2);
}
else if (remaining.StartsWithSegments("/install", StringComparison.OrdinalIgnoreCase, out remaining2))
{
trace = await InstallAsync(req, res, remaining2);
}
else if (remaining.StartsWithSegments("/uninstall", StringComparison.OrdinalIgnoreCase, out remaining2))
{
trace = await UninstallAsync(req, res, remaining2);
}
else if (remaining.StartsWithSegments("/reinstall", StringComparison.OrdinalIgnoreCase, out remaining2))
{
trace = await ReinstallAsync(req, res, remaining2);
}
else
{
await _next(context);
}
if (_options.Log != null)
{
trace?.Log(_options.Log);
}
return;
}
await _next(context);
}
async Task <KFrameTrace> PFrameAsync(HttpRequest req, HttpResponse res, string remaining)
{
var trace = new KFrameTrace(KFrameTrace.TraceMethod.PFrame);
res.Clear();
if (string.IsNullOrEmpty(remaining) || remaining[0] != '/')
{
res.StatusCode = trace.StatusCode = (int)HttpStatusCode.NotFound;
return(trace);
}
if (!long.TryParse(remaining.Substring(1), out var iframe))
{
res.StatusCode = trace.StatusCode = (int)HttpStatusCode.NotFound;
return(trace);
}
trace.IFrames = new[] { iframe };
var etag = req.Headers["If-None-Match"];
if (!string.IsNullOrEmpty(etag) && _repository.HasPFrame(etag))
{
res.StatusCode = trace.StatusCode = (int)HttpStatusCode.NotModified;
trace.FromETag = etag.ToString();
return(trace);
}
var result = await _repository.GetPFrameAsync(iframe, trace);
res.StatusCode = (int)HttpStatusCode.OK;
res.ContentType = "application/json";
res.Headers.Add("Access-Control-Allow-Origin", "*");
var typedHeaders = res.GetTypedHeaders();
typedHeaders.CacheControl = new CacheControlHeaderValue {
NoCache = true
};
//typedHeaders.Expires = DateTime.Today.ToUniversalTime().AddDays(1);
typedHeaders.ETag = new EntityTagHeaderValue(result.ETag);
trace.ETag = result.ETag;
var json = JsonSerializer.Serialize(result.Result);
await res.WriteAsync(json);
trace.ContentLength = res.ContentLength ?? json.Length;
return(trace);
}