private void ProcessRequestCallback(IAsyncResult ar)
{
var context = httpListener.EndGetContext(ar);
// Tell listener to stast the next connection simultaneously
httpListener.BeginGetContext(ProcessRequestCallback, null);
var request = context.Request;
var requestUrl = new Uri(request.Url.ToString().ToLower());
// Check for double request
if (requestUrl.AbsoluteUri.Contains("favicon"))
{
return;
}
if (request.HttpMethod == "OPTIONS")
{
context.Response.AddHeader("Access-Control-Allow-Origin", "*");
context.Response.AddHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Z-Key");
context.Response.AddHeader("Access-Control-Allow-Methods", "GET,POST,PUT,DELETE,OPTIONS");
context.Response.Close();
return;
}
var readingResource = request.HttpMethod == "GET";
var pathList = requestUrl.LocalPath.Split("/").Where(s => !string.IsNullOrEmpty(s)).Take(2).ToList();
if (pathList.Count == 2)
{
if (!readingResource)
{
var resource = pathList[0] + "/" + pathList[1];
RemoveCacheByPattern("*" + resource + "*");
Console.Out.WriteLineAsync($"[Thread {Thread.CurrentThread.ManagedThreadId}] Removing cache for " + resource + " because of method : " + request.HttpMethod);
}
}
var redisKey = requestUrl.PathAndQuery;
if (readingResource &&
connectionMultiplexer.GetDatabase(0).KeyExists(redisKey))
{
Console.Out.WriteLineAsync($"[Thread {Thread.CurrentThread.ManagedThreadId}] Returning cached request.");
var content = connectionMultiplexer.GetDatabase(0).StringGet(redisKey);
var cachedResponse = JsonConvert.DeserializeObject <CachedResponse>(content);
CopyHelper.Headers(CopyHelper.ToNameValueCollection(cachedResponse.Headers), context.Response.Headers);
CopyHelper.Response(context.Response, cachedResponse.Body, cachedResponse.Body.Length);
}
else
{
var uri = GetRedirectUri(request);
Console.Out.WriteLineAsync($"[Thread {Thread.CurrentThread.ManagedThreadId}] Incoming {request.HttpMethod} request for: {uri}");
var webRequest = WebRequest.Create(uri);
CopyHelper.RequestDetails(webRequest, request);
CopyHelper.Headers(request.Headers, webRequest.Headers);
CopyHelper.InputStream(webRequest, request);
var webResponse = webRequest.GetResponse();
var buffer = new byte[CopyHelper.BufferSize];
var read = webResponse.GetResponseStream().Read(buffer, 0, buffer.Length);
CopyHelper.Headers(webResponse.Headers, context.Response.Headers);
CopyHelper.Response(context.Response, buffer, read);
if (readingResource)
{
var serializeObject = JsonConvert.SerializeObject(new CachedResponse
{
Body = buffer.Take(read).ToArray(),
Headers = CopyHelper.ToDictionary(webResponse.Headers)
});
connectionMultiplexer.GetDatabase(0).StringSet(redisKey, serializeObject);
}
}
}