/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="next"></param>
/// <returns></returns>
public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
IServiceProvider serviceProvider = context.HttpContext.RequestServices;
var responseCacheOption = serviceProvider.GetService <ResponseCacheOption>();
//配置存在且配置关闭或者持续时长等于0，即忽略响应缓存
if ((responseCacheOption != null && !responseCacheOption.Enabled) || Duration == 0)
{
goto gotoNext;
}
context.HttpContext.Request.EnableBuffering();
var _logger = serviceProvider.GetRequiredService <ILogger <PostResponseCacheAttribute> >();
var _configuration = serviceProvider.GetRequiredService <IConfiguration>();
var _memorycache = serviceProvider.GetService <IMemoryCache>();
IRedisManager _redisManager = null;
if ((responseCacheOption != null && responseCacheOption.Cluster) || Cluster)
{
_redisManager = serviceProvider.GetService <IRedisManager>();
if (_redisManager == null)
{
throw new ArgumentNullException(nameof(IMemoryCache), "Post响应已启用集群模式，缓存依赖IRedisManager，请services.AddRedisManager()注入IRedisManager后再使用[PostResponseCache]");
}
}
if (_memorycache == null)
{
throw new ArgumentNullException(nameof(IMemoryCache), "Post响应缓存依赖IMemoryCache，请services.AddMemoryCache()注入IMemoryCache后再使用[PostResponseCache]");
}
//标识已触发过响应缓存，防止中间件再次触发
_memorycache.Set($"PostResponseCache_{context.HttpContext.Request.Path}", "标识已触发过响应缓存，防止中间件再次触发", new MemoryCacheEntryOptions {
AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(5)
});
var _requestCacheData = serviceProvider.GetService <RequestCacheData>();
if (_requestCacheData == null)
{
throw new ArgumentNullException(nameof(IMemoryCache), "Post响应缓存依赖ResponseCacheData，请调用services.AddShareRequestBody()注入后再使用[PostResponseCache]");
}
var token = context.HttpContext.RequestAborted.Register(async() =>
{
await Task.CompletedTask;
return;
});
var descriptor = (Microsoft.AspNetCore.Mvc.Controllers.ControllerActionDescriptor)context.ActionDescriptor;
var attribute = (IgnorePostResponseCacheAttribute)descriptor.MethodInfo.GetCustomAttributes(typeof(IgnorePostResponseCacheAttribute), true).FirstOrDefault();
if (attribute != null)
{
//记录忽略的路由，中间件跳过
_memorycache.Set($"IgnorePostResponseCache_{context.HttpContext.Request.Path}", true, new MemoryCacheEntryOptions {
AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(5)
});
goto gotoNext;
}
if (context.HttpContext.Request.Method.Equals("get", StringComparison.OrdinalIgnoreCase) || context.HttpContext.Request.Method.Equals("head", StringComparison.OrdinalIgnoreCase))
{
goto gotoNext;
}
else
{
var convertedDictionatry = context.HttpContext.Request.Query.ToDictionary(s => s.Key.ToLower(), s => s.Value);
if (IgnoreVaryByQueryKeys == null || !IgnoreVaryByQueryKeys.Any())
{
if (responseCacheOption.IgnoreVaryByQueryKeys.Any())
{
IgnoreVaryByQueryKeys = responseCacheOption.IgnoreVaryByQueryKeys.ToArray();
}
}
foreach (var item in IgnoreVaryByQueryKeys ?? new string[0])
{
if (convertedDictionatry.ContainsKey(item.ToLower()))
{
convertedDictionatry.Remove(item.ToLower());
}
}
StringBuilder requestStrKey = new StringBuilder(context.HttpContext.Request.Path);
foreach (var item in convertedDictionatry)
{
requestStrKey.Append($"{item.Key}{item.Value}");
}
string bodyValue;
if (_requestCacheData == null || string.IsNullOrEmpty(_requestCacheData.Body))
{
bodyValue = await Common.ReadAsString(context.HttpContext);
_requestCacheData = new RequestCacheData {
Body = bodyValue
};
}
else
{
bodyValue = _requestCacheData.Body;
}
if (!string.IsNullOrEmpty(bodyValue) && !"null".Equals(bodyValue))
{
//非Get请求body有值才被缓存，其他默认不缓存，防止body读取失败导致缓存异常
bodyValue = Regex.Replace(bodyValue, @"\s(?=([^""]*""[^""]*"")*[^""]*$)", string.Empty);
bodyValue = bodyValue.Replace("\r\n", "").Replace(" : ", ":").Replace("\n ", "").Replace("\n", "").Replace(": ", ":").Replace(", ", ",");
requestStrKey.Append($"body{bodyValue}");
ResponseCacheData cacheResponseBody = null;
if (Cluster)
{
cacheResponseBody = _redisManager.Get <ResponseCacheData>($"NetProPostResponse:{requestStrKey}");
}
else
{
cacheResponseBody = _memorycache.Get <ResponseCacheData>($"NetProPostResponse:{requestStrKey}");
}
if (cacheResponseBody != null && !context.HttpContext.RequestAborted.IsCancellationRequested)
{
if (!context.HttpContext.Response.HasStarted)
{
_logger.LogInformation($"触发PostResponseCacheAttribute本地缓存");
switch (ResponseMode)
{
case ResponseMode.Cache:
context.HttpContext.Response.StatusCode = cacheResponseBody.StatusCode;
context.HttpContext.Response.ContentType = cacheResponseBody.ContentType;
await context.HttpContext.Response.WriteAsync(cacheResponseBody.Body);
await Task.CompletedTask;
return;
case ResponseMode.Error:
if (cacheResponseBody.StatusCode == 200)
{
//TODO确定StatusCode与Headers响应的先后顺序
context.HttpContext.Response.StatusCode = (int)HttpStatusCode.Conflict;
context.HttpContext.Response.Headers.Add("Kestrel-ResponseMode", $"{ResponseMode}");
context.HttpContext.Response.ContentType = cacheResponseBody.ContentType;
await context.HttpContext.Response.WriteAsync(JsonSerializer.Serialize(new
{
Code = -1,
Msg = $"{Message}"
}, new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
Encoder = System.Text.Encodings.Web.JavaScriptEncoder.Create(System.Text.Unicode.UnicodeRanges.All)
}), Encoding.UTF8);
await Task.CompletedTask;
return;
}
else
{
context.HttpContext.Response.StatusCode = cacheResponseBody.StatusCode;
context.HttpContext.Response.ContentType = cacheResponseBody.ContentType;
await context.HttpContext.Response.WriteAsync(cacheResponseBody.Body);
await Task.CompletedTask;
return;;
}
}
}
else
{
_logger.LogError($"StatusCode无法设置，因为响应已经启动,位置为:触发本地缓存开始赋值[responsecache2]");
await Task.CompletedTask;
return;
}
}
else if (!context.HttpContext.RequestAborted.IsCancellationRequested)
{
try
{
var actionResult = await next();
dynamic responseResult = (dynamic)actionResult.Result;
if (actionResult.Exception != null)
{
// 过滤器中await next();执行的始终是Action而不是下一个过滤器或者中间件
await Task.CompletedTask;
return;
}
if (responseResult == null)
{
await Task.CompletedTask;
return;
}
if (responseResult.GetType().Name == "EmptyResult")
{
await Task.CompletedTask;
return;
}
string body = string.Empty;
if (responseResult as Microsoft.AspNetCore.Mvc.ObjectResult != null)
{
body = JsonSerializer.Serialize(responseResult.Value, new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
Encoder = System.Text.Encodings.Web.JavaScriptEncoder.Create(System.Text.Unicode.UnicodeRanges.All)
});
}
if (Cluster)
{
_redisManager.Set($"NetProPostResponse:{requestStrKey}", new ResponseCacheData
{
Body = body,
ContentType = "application/json",
StatusCode = responseResult.StatusCode ?? 200,
}, TimeSpan.FromSeconds(Duration));
}
else
{
_memorycache.Set($"NetProPostResponse:{requestStrKey}", new ResponseCacheData
{
Body = body,
ContentType = "application/json",
StatusCode = responseResult.StatusCode ?? 200,
}, TimeSpan.FromSeconds(Duration));
}
}
catch (Exception ex)
{
await Task.CompletedTask;
return;
}
await Task.CompletedTask;
return;
}
else if (context.HttpContext.RequestAborted.IsCancellationRequested)
{
await Task.CompletedTask;
return;
}
}
else if (!context.HttpContext.RequestAborted.IsCancellationRequested)
{
goto gotoNext;
}
else
{
await Task.CompletedTask;
return;
}
}
gotoNext:
await next();
}
/// <summary>
/// Post:（从头排序后+body json整体 ）hash
/// </summary>
/// <param name="context"></param>
/// <param name="responseCacheData">自定义对象不能ctor注入</param>
/// <returns></returns>
public async Task InvokeAsync(HttpContext context, ResponseCacheData responseCacheData, RequestCacheData requestCacheData)
{
context.Request.EnableBuffering();
var token = context.RequestAborted.Register(async() =>
{
await Task.CompletedTask;
return;
});
var endpoint = context.Features.Get <IEndpointFeature>()?.Endpoint;
if (endpoint != null)
{
if (endpoint.Metadata
.Any(m => m is IgnorePostResponseCacheAttribute))
{
goto gotoNext;
}
}
if (context.Request.Method.Equals("get", StringComparison.OrdinalIgnoreCase) ||
context.Request.Method.Equals("head", StringComparison.OrdinalIgnoreCase) ||
_memorycache.TryGetValue($"PostResponseCache_{context.Request.Path}", out object _tempIgnoe) ||
_memorycache.TryGetValue($"IgnorePostResponseCache_{context.Request.Path}", out object _temp))
{
goto gotoNext;
}
else
{
var convertedDictionatry = context.Request.Query.ToDictionary(s => s.Key.ToLower(), s => s.Value);
foreach (var item in _responseCacheOption?.IgnoreVaryQuery ?? new List <string>())
{
if (convertedDictionatry.ContainsKey(item.ToLower()))
{
convertedDictionatry.Remove(item.ToLower());
}
}
StringBuilder requestStrKey = new StringBuilder(context.Request.Path);
foreach (var item in convertedDictionatry)
{
requestStrKey.Append($"{item.Key}{item.Value}");
}
string bodyValue;
if (requestCacheData == null || string.IsNullOrEmpty(requestCacheData.Body))
{
bodyValue = await ReadAsString(context);
requestCacheData = new RequestCacheData {
Body = bodyValue
};
}
else
{
bodyValue = requestCacheData.Body;
}
if (!string.IsNullOrEmpty(bodyValue) && !"null".Equals(bodyValue))
{
//非Get请求body有值才被缓存，其他默认不缓存，防止body读取失败导致缓存异常
bodyValue = Regex.Replace(bodyValue, @"\s(?=([^""]*""[^""]*"")*[^""]*$)", string.Empty);
bodyValue = bodyValue.Replace("\r\n", "").Replace(" : ", ":").Replace("\n ", "").Replace("\n", "").Replace(": ", ":").Replace(", ", ",");
requestStrKey.Append($"body{bodyValue}");
var cacheResponseBody = _memorycache.Get <ResponseCacheData>($"NetProPostResponse:{requestStrKey}");
if (cacheResponseBody != null && !context.RequestAborted.IsCancellationRequested)
{
//https://stackoverflow.com/questions/45675102/asp-net-core-middleware-cannot-set-status-code-on-exception-because-response-ha
if (!context.Response.HasStarted)
{
context.Response.StatusCode = cacheResponseBody.StatusCode;
context.Response.ContentType = cacheResponseBody.ContentType;
await context.Response.WriteAsync(cacheResponseBody.Body);
_iLogger.LogInformation($"触发PostResponseCacheMiddleware本地缓存");
}
else
{
_iLogger.LogError($"StatusCode无法设置，因为响应已经启动,位置为:触发本地缓存开始赋值[responsecache2]");
await Task.CompletedTask;
return;
}
}
else if (!context.RequestAborted.IsCancellationRequested)
{
Stream originalBody = context.Response.Body;
try
{
using (var memStream = new MemoryStream())
{
context.Response.Body = memStream;
await _next(context);
memStream.Position = 0;
string responseBody = new StreamReader(memStream).ReadToEnd();
responseCacheData = new ResponseCacheData
{
Body = responseBody,
ContentType = context.Response.ContentType,
StatusCode = context.Response.StatusCode
};
memStream.Position = 0;
await memStream.CopyToAsync(originalBody);
_memorycache.GetOrCreate <ResponseCacheData>($"NetProPostResponse:{requestStrKey}", s =>
{
s.AbsoluteExpirationRelativeToNow = new TimeSpan(_responseCacheOption.Duration);
return(new ResponseCacheData
{
Body = responseBody,
ContentType = context.Response.ContentType,
StatusCode = context.Response.StatusCode
});
});
}
await Task.CompletedTask;
return;
}
finally
{
context.Response.Body = originalBody;
}
}
else if (context.RequestAborted.IsCancellationRequested)
{
await Task.CompletedTask;
return;
}
}
else if (!context.RequestAborted.IsCancellationRequested)
{
goto gotoNext;
}
else
{
await Task.CompletedTask;
return;
}
}
gotoNext:
await _next(context);
}
/// <summary>
/// Post:（从头排序后+body json整体 ）hash
/// </summary>
/// <param name="context"></param>
/// <param name="responseCacheData">自定义对象不能ctor注入</param>
/// <returns></returns>
public async Task InvokeAsync(HttpContext context, ResponseCacheData responseCacheData, RequestCacheData requestCacheData)
{
context.Request.EnableBuffering();
var token = context.RequestAborted.Register(async() =>
{
await Task.CompletedTask;
return;
});
var endpoint = context.GetEndpoint();
if (endpoint != null)
{
if (endpoint.Metadata
.Any(m => m is IgnorePostResponseCacheAttribute))
{
goto gotoNext;
}
}
if (context.Request.Method.Equals("get", StringComparison.OrdinalIgnoreCase) ||
context.Request.Method.Equals("head", StringComparison.OrdinalIgnoreCase) ||
_memorycache.TryGetValue($"PostResponseCache_{context.Request.Path}", out object _tempIgnoe) ||
_memorycache.TryGetValue($"IgnorePostResponseCache_{context.Request.Path}", out object _temp))
{
goto gotoNext;
}
else
{
var convertedDictionatry = context.Request.Query.ToDictionary(s => s.Key.ToLower(), s => s.Value);
foreach (var item in _responseCacheOption?.IgnoreVaryByQueryKeys ?? new List <string>())
{
if (convertedDictionatry.ContainsKey(item.ToLower()))
{
convertedDictionatry.Remove(item.ToLower());
}
}
StringBuilder requestStrKey = new StringBuilder(context.Request.Path);
foreach (var item in convertedDictionatry)
{
requestStrKey.Append($"{item.Key}{item.Value}");
}
string bodyValue;
if (requestCacheData == null || string.IsNullOrEmpty(requestCacheData.Body))
{
bodyValue = await Common.ReadAsString(context);
requestCacheData = new RequestCacheData {
Body = bodyValue
};
}
else
{
bodyValue = requestCacheData.Body;
}
if (!string.IsNullOrEmpty(bodyValue) && !"null".Equals(bodyValue))
{
//非Get请求body有值才被缓存，其他默认不缓存，防止body读取失败导致缓存异常
bodyValue = Regex.Replace(bodyValue, @"\s(?=([^""]*""[^""]*"")*[^""]*$)", string.Empty);
bodyValue = bodyValue.Replace("\r\n", "").Replace(" : ", ":").Replace("\n ", "").Replace("\n", "").Replace(": ", ":").Replace(", ", ",");
requestStrKey.Append($"body{bodyValue}");
ResponseCacheData cacheResponseBody = null;
IRedisManager _redisManager = null;
if (_responseCacheOption.Cluster)
{
_redisManager = context.RequestServices.GetService <IRedisManager>();
if (_redisManager == null)
{
throw new ArgumentNullException(nameof(RedisCacheOption), $"PostResponseCache组件在集群模式下未检测到注入NetPro.CsRedis组件,请检查是否遗漏{nameof(RedisCacheOption)}配置节点");
}
cacheResponseBody = _redisManager.Get <ResponseCacheData>($"NetProPostResponse:{requestStrKey}");
}
else
{
cacheResponseBody = _memorycache.Get <ResponseCacheData>($"NetProPostResponse:{requestStrKey}");
}
if (cacheResponseBody != null && !context.RequestAborted.IsCancellationRequested)
{
//https://stackoverflow.com/questions/45675102/asp-net-core-middleware-cannot-set-status-code-on-exception-because-response-ha
if (!context.Response.HasStarted)
{
context.Response.StatusCode = cacheResponseBody.StatusCode;
context.Response.ContentType = cacheResponseBody.ContentType;
context.Response.Headers["response-cache"] = "true";
await context.Response.WriteAsync(cacheResponseBody.Body);
_iLogger.LogInformation($"触发PostResponseCacheMiddleware本地缓存");
//直接return可避免此错误 ：OnStarting cannot be set because the response has already started.
await Task.CompletedTask;
return;
}
else
{
_iLogger.LogError($"StatusCode无法设置，因为响应已经启动,位置为:触发本地缓存开始赋值[responsecache2]");
await Task.CompletedTask;
return;
}
}
else if (!context.RequestAborted.IsCancellationRequested)
{
Stream originalBody = context.Response.Body;
try
{
using (var memStream = new MemoryStream())
{
context.Response.Body = memStream;
await _next(context);
memStream.Position = 0;
string responseBody = new StreamReader(memStream).ReadToEnd();
responseCacheData = new ResponseCacheData
{
Body = responseBody,
ContentType = context.Response.ContentType,
StatusCode = context.Response.StatusCode
};
memStream.Position = 0;
await memStream.CopyToAsync(originalBody);
if (_responseCacheOption.Cluster)
{
_redisManager.Set($"NetProPostResponse:{requestStrKey}", new ResponseCacheData
{
Body = responseBody,
ContentType = context.Response.ContentType,
StatusCode = context.Response.StatusCode
}, TimeSpan.FromSeconds(_responseCacheOption.Duration));
}
else
{
_memorycache.Set <ResponseCacheData>($"NetProPostResponse:{requestStrKey}", new ResponseCacheData
{
Body = responseBody,
ContentType = context.Response.ContentType,
StatusCode = context.Response.StatusCode
}, TimeSpan.FromSeconds(_responseCacheOption.Duration));
}
}
await Task.CompletedTask;
return;
}
finally
{
context.Response.Body = originalBody;
}
}
else if (context.RequestAborted.IsCancellationRequested)
{
await Task.CompletedTask;
return;
}
}
else if (!context.RequestAborted.IsCancellationRequested)
{
goto gotoNext;
}
else
{
await Task.CompletedTask;
return;
}
}
gotoNext:
await _next(context);
}
