C# IRequest.GetJsonpCallback方法代码示例

        public override Task ProcessRequestAsync(IRequest httpReq, IResponse httpRes, string operationName)
        {
            try
            {
                var appHost = HostContext.AppHost;
                if (appHost.ApplyPreRequestFilters(httpReq, httpRes)) 
                    return EmptyTask;
                
                var restPath = GetRestPath(httpReq.Verb, httpReq.PathInfo);
                if (restPath == null)
                {
                    return new NotSupportedException("No RestPath found for: " + httpReq.Verb + " " + httpReq.PathInfo)
                        .AsTaskException();
                }
                httpReq.SetRoute(restPath as RestPath);

                operationName = restPath.RequestType.GetOperationName();

                var callback = httpReq.GetJsonpCallback();
                var doJsonp = HostContext.Config.AllowJsonpRequests
                              && !string.IsNullOrEmpty(callback);

                if (ResponseContentType != null)
                    httpReq.ResponseContentType = ResponseContentType;

                var responseContentType = httpReq.ResponseContentType;
                appHost.AssertContentType(responseContentType);

                var request = httpReq.Dto = CreateRequest(httpReq, restPath);

                if (appHost.ApplyRequestFilters(httpReq, httpRes, request)) 
                    return EmptyTask;

                var rawResponse = GetResponse(httpReq, request);
                return HandleResponse(rawResponse, response => 
                {
                    response = appHost.ApplyResponseConverters(httpReq, response);

                    if (appHost.ApplyResponseFilters(httpReq, httpRes, response)) 
                        return EmptyTask;

                    if (responseContentType.Contains("jsv") && !string.IsNullOrEmpty(httpReq.QueryString[Keywords.Debug]))
                        return WriteDebugResponse(httpRes, response);

                    if (doJsonp && !(response is CompressedResult))
                        return httpRes.WriteToResponse(httpReq, response, (callback + "(").ToUtf8Bytes(), ")".ToUtf8Bytes());
                    
                    return httpRes.WriteToResponse(httpReq, response);
                },  
                ex => !HostContext.Config.WriteErrorsToResponse 
                    ? ex.ApplyResponseConverters(httpReq).AsTaskException()
                    : HandleException(httpReq, httpRes, operationName, ex.ApplyResponseConverters(httpReq)));
            }
            catch (Exception ex)
            {
                return !HostContext.Config.WriteErrorsToResponse
                    ? ex.ApplyResponseConverters(httpReq).AsTaskException()
                    : HandleException(httpReq, httpRes, operationName, ex.ApplyResponseConverters(httpReq));
            }
        }

        private bool CacheAndWriteResponse(CacheInfo cacheInfo, IRequest req, IResponse res, object response)
        {
            var httpResult = response as IHttpResult;
            var dto = httpResult != null ? httpResult.Response : response;
            if (dto == null || dto is IPartialWriter || dto is IStreamWriter)
                return false;

            var expiresIn = cacheInfo.ExpiresIn.GetValueOrDefault(DefaultExpiresIn);
            var cache = cacheInfo.LocalCache ? HostContext.LocalCache : HostContext.Cache;

            var responseBytes = dto as byte[];
            if (responseBytes == null)
            {
                var rawStr = dto as string;
                if (rawStr != null)
                    responseBytes = rawStr.ToUtf8Bytes();
                else
                {
                    var stream = dto as Stream;
                    if (stream != null)
                        responseBytes = stream.ReadFully();
                }
            }

            var encoding = req.GetCompressionType();
            var cacheKeyEncoded = encoding != null ? cacheInfo.CacheKey + "." + encoding : null;
            if (responseBytes != null || req.ResponseContentType.IsBinary())
            {
                if (responseBytes == null)
                    responseBytes = HostContext.ContentTypes.SerializeToBytes(req, dto);

                cache.Set(cacheInfo.CacheKey, responseBytes, expiresIn);

                if (encoding != null)
                {
                    res.AddHeader(HttpHeaders.ContentEncoding, encoding);
                    responseBytes = responseBytes.CompressBytes(encoding);
                    cache.Set(cacheKeyEncoded, responseBytes, expiresIn);
                }
            }
            else
            {
                var serializedDto = req.SerializeToString(dto);
                if (req.ResponseContentType.MatchesContentType(MimeTypes.Json))
                {
                    var jsonp = req.GetJsonpCallback();
                    if (jsonp != null)
                        serializedDto = jsonp + "(" + serializedDto + ")";
                }

                responseBytes = serializedDto.ToUtf8Bytes();
                cache.Set(cacheInfo.CacheKey, responseBytes, expiresIn);

                if (encoding != null)
                {
                    responseBytes = responseBytes.CompressBytes(encoding);
                    cache.Set(cacheKeyEncoded, responseBytes, expiresIn);
                    res.AddHeader(HttpHeaders.ContentEncoding, encoding);
                }
            }

            var doHttpCaching = cacheInfo.MaxAge != null || cacheInfo.CacheControl != CacheControl.None;
            if (doHttpCaching)
            {
                var cacheControl = BuildCacheControlHeader(cacheInfo);
                if (cacheControl != null)
                {
                    var lastModified = cacheInfo.LastModified.GetValueOrDefault(DateTime.UtcNow);
                    cache.Set("date:" + cacheInfo.CacheKey, lastModified, expiresIn);
                    res.AddHeaderLastModified(lastModified);
                    res.AddHeader(HttpHeaders.CacheControl, cacheControl);

                    if (encoding != null)
                        res.AddHeader(HttpHeaders.Vary, "Accept-Encoding");
                    if (cacheInfo.VaryByUser)
                        res.AddHeader(HttpHeaders.Vary, "Cookie");
                }
            }

            if (httpResult != null)
            {
                foreach (var header in httpResult.Headers)
                {
                    res.AddHeader(header.Key, header.Value);
                }
            }

            res.WriteBytesToResponse(responseBytes, req.ResponseContentType);
            return true;
        }

        public override void Execute(IRequest req, IResponse res, object requestDto)
        {
            if (req.Verb != HttpMethods.Get && req.Verb != HttpMethods.Head)
                return;
            if (req.IsInProcessRequest())
                return;

            var feature = HostContext.GetPlugin<HttpCacheFeature>();
            if (feature == null)
                throw new NotSupportedException(ErrorMessages.CacheFeatureMustBeEnabled.Fmt("[CacheResponse]"));

            var keyBase = "res:" + req.RawUrl;
            var keySuffix = MimeTypes.GetExtension(req.ResponseContentType);

            var modifiers = "";
            if (req.ResponseContentType == MimeTypes.Json)
            {
                string jsonp = req.GetJsonpCallback();
                if (jsonp != null)
                    modifiers = "jsonp:" + jsonp.SafeVarName();
            }

            if (VaryByUser)
                modifiers += (modifiers.Length > 0 ? "+" : "") + "user:" + req.GetSessionId();

            if (VaryByRoles != null && VaryByRoles.Length > 0)
            {
                var userSession = req.GetSession();
                if (userSession != null)
                {
                    var authRepo = HostContext.AppHost.GetAuthRepository(req);
                    using (authRepo as IDisposable)
                    {
                        foreach (var role in VaryByRoles)
                        {
                            if (userSession.HasRole(role, authRepo))
                                modifiers += (modifiers.Length > 0 ? "+" : "") + "role:" + role;
                        }
                    }
                }
            }

            if (modifiers.Length > 0)
                keySuffix += "+" + modifiers;

            var cacheInfo = new CacheInfo
            {
                KeyBase = keyBase,
                KeyModifiers = keySuffix,
                ExpiresIn = Duration > 0 ? TimeSpan.FromSeconds(Duration) : (TimeSpan?)null,
                MaxAge = MaxAge >= 0 ? TimeSpan.FromSeconds(MaxAge) : (TimeSpan?)null,
                CacheControl = CacheControl,
                VaryByUser = VaryByUser,
                LocalCache = LocalCache,
                NoCompression = NoCompression,
            };

            if (req.HandleValidCache(cacheInfo))
                return;

            req.Items[Keywords.CacheInfo] = cacheInfo;
        }