public async Task Invoke(HttpContext context)
{
var cacheKey = GenerateCacheKeyFromRequest(context.Request);
var cachedResponse = await _redisCacheService.GetCachedResponseAsync(cacheKey);
if (!string.IsNullOrEmpty(cachedResponse))
{
// var jsonString = "{\"foo\":1,\"bar\":false}";
byte[] data = Encoding.UTF8.GetBytes(cachedResponse);
context.Response.StatusCode = 200;
context.Response.ContentType = "application/json";
await context.Response.Body.WriteAsync(data, 0, data.Length);
//context.Response.Body
// context.Response = new HttpResponse { StatusCodes = "200" };
//var contentResult = new ContentResult
//{
// Content = cachedResponse,
// ContentType = "application/json",
// StatusCode = 200
//};
//context.Response.
//context.Response = contentResult;
// await context.Response.WriteAsync(cachedResponse);
return;
}
//Copy a pointer to the original response body stream
var originalBodyStream = context.Response.Body;
//Create a new memory stream...
using (var responseBody = new MemoryStream())
{
//...and use that for the temporary response body
context.Response.Body = responseBody;
//Continue down the Middleware pipeline, eventually returning to this class
await _next(context);
if (context.Response != null && context.Response.ContentType != null && context.Response.ContentType.Contains("application/json"))
{
context.Response.Body.Seek(0, SeekOrigin.Begin);
//...and copy it into a string
// var body = JsonConvert.DeserializeObject<dynamic>(new StreamReader(stream).ReadToEnd());
string text = await new StreamReader(context.Response.Body).ReadToEndAsync();
var body = JsonConvert.DeserializeObject <dynamic>(text);
await _redisCacheService.CacheResponseAsync(cacheKey, body, 600);
//We need to reset the reader for the response so that the client can read it.
context.Response.Body.Seek(0, SeekOrigin.Begin);
}
//Format the response from the server
// var response = await FormatResponse(context.Response);
//Copy the contents of the new memory stream (which contains the response) to the original stream, which is then returned to the client.
await responseBody.CopyToAsync(originalBodyStream);
}
//var originalBody = context.Response.Body;
//var responseBody = new MemoryStream();
//context.Response.Body = responseBody;
//await _next(context);
//if (context.Response != null && context.Response.ContentType != null && context.Response.ContentType.Contains("application/json"))
//{
// using (Stream stream = context.Response.Body)
// {
// stream.Seek(0, SeekOrigin.Begin);
// var body = JsonConvert.DeserializeObject<dynamic>(new StreamReader(stream).ReadToEnd());
// await _redisCacheService.CacheResponseAsync(cacheKey, body, 600);
// }
//}
//responseBody.Seek(0, SeekOrigin.Begin);
//await responseBody.CopyToAsync(originalBody);
// //Copy a pointer to the original response body stream
// var originalBodyStream = context.Response.Body;
//using (var responseBody = new MemoryStream())
//{
// //...and use that for the temporary response body
// context.Response.Body = responseBody;
// //Continue down the Middleware pipeline, eventually returning to this class
// await _next(context);
// //Format the response from the server
// var response = await FormatResponse(context.Response);
// //TODO: Save log to chosen datastore
// //Copy the contents of the new memory stream (which contains the response) to the original stream, which is then returned to the client.
// await responseBody.CopyToAsync(originalBodyStream);
//}
//// await _redisCacheService.CacheResponseAsync(cacheKey, "testData", 600);
//if (context.Response != null )
//{
// await _redisCacheService.CacheResponseAsync(cacheKey, context.Response, 600);
//}
// await context.Response.WriteAsync("hello");
}