private void WriteResponseBody(OutputFormatterWriteContext context)
{
HttpRequest request = context.HttpContext.Request;
HttpResponse response = context.HttpContext.Response;
IEdmModel model = request.ODataProperties().Model;
if (model == null)
{
throw Error.InvalidOperation(SRResources.RequestMustHaveModel);
}
object value = context.Object;
Type type = value.GetType();
ODataSerializer serializer = GetSerializer(type, value, model, new DefaultODataSerializerProvider(), request);
IUrlHelper urlHelper = context.HttpContext.UrlHelper();
ODataPath path = request.ODataProperties().Path;
IEdmNavigationSource targetNavigationSource = path == null ? null : path.NavigationSource;
string preferHeader = RequestPreferenceHelpers.GetRequestPreferHeader(request);
string annotationFilter = null;
if (!String.IsNullOrEmpty(preferHeader))
{
ODataMessageWrapper messageWrapper = new ODataMessageWrapper(response.Body, response.Headers);
messageWrapper.SetHeader(RequestPreferenceHelpers.PreferHeaderName, preferHeader);
annotationFilter = messageWrapper.PreferHeader().AnnotationFilter;
}
IODataResponseMessage responseMessage = new ODataMessageWrapper(response.Body, response.Headers);
if (annotationFilter != null)
{
responseMessage.PreferenceAppliedHeader().AnnotationFilter = annotationFilter;
}
Uri baseAddress = GetBaseAddress(request);
ODataMessageWriterSettings writerSettings = new ODataMessageWriterSettings(_messageWriterSettings)
{
PayloadBaseUri = baseAddress,
Version = ODataProperties.DefaultODataVersion,
};
string metadataLink = urlHelper.CreateODataLink(new MetadataPathSegment());
if (metadataLink == null)
{
throw new SerializationException(SRResources.UnableToDetermineMetadataUrl);
}
writerSettings.ODataUri = new ODataUri
{
ServiceRoot = baseAddress,
// TODO: 1604 Convert webapi.odata's ODataPath to ODL's ODataPath, or use ODL's ODataPath.
SelectAndExpand = request.ODataProperties().SelectExpandClause,
Path = (path == null || IsOperationPath(path)) ? null : path.ODLPath,
};
using (ODataMessageWriter messageWriter = new ODataMessageWriter(responseMessage, writerSettings, model))
{
ODataSerializerContext writeContext = new ODataSerializerContext()
{
Request = request,
RequestContext = request.HttpContext,
Url = urlHelper,
NavigationSource = targetNavigationSource,
Model = model,
RootElementName = GetRootElementName(path) ?? "root",
SkipExpensiveAvailabilityChecks = serializer.ODataPayloadKind == ODataPayloadKind.Feed,
Path = path,
MetadataLevel = ODataMediaTypes.GetMetadataLevel(new MediaTypeHeaderValue(context.ContentType.Value)),
SelectExpandClause = request.ODataProperties().SelectExpandClause
};
serializer.WriteObject(value, type, messageWriter, writeContext);
}
}
public async Task WriteJson(object value, Stream writeStream)
{
IEdmModel model = _odataProperties.Model;
if (model == null)
{
throw new Exception("Microsoft.OData.Edm.Error.InvalidOperation(SRResources.RequestMustHaveModel)");
}
var type = value.GetType();
type = _context.ObjectType;
var pageResult = value as PageResult <object>;
if (pageResult != null)
{
//value = pageResult.Items;
type = pageResult.Items.GetType();
}
var urlHelper = UrlHelper(_context.HttpContext);
var path = Request.ODataFeature().Path;
IEdmNavigationSource targetNavigationSource = path?.NavigationSource;
// serialize a response
//HttpConfiguration configuration = Request.GetConfiguration();
//if (configuration == null)
//{
// throw Error.InvalidOperation(SRResources.RequestMustContainConfiguration);
//}
// TODO: Fix this ffs...
string preferHeader = RequestPreferenceHelpers.GetRequestPreferHeader(Request);
string annotationFilter = null;
if (ODataCountMediaTypeMapping.IsCountRequest(Request.HttpContext))
{
Response.ContentType = "text/plain";
}
if (!String.IsNullOrEmpty(preferHeader))
{
ODataMessageWrapper messageWrapper = new ODataMessageWrapper(writeStream, Response.Headers);
messageWrapper.SetHeader(RequestPreferenceHelpers.PreferHeaderName, preferHeader);
annotationFilter = messageWrapper.PreferHeader().AnnotationFilter;
}
IODataResponseMessage responseMessage = new ODataMessageWrapper(writeStream, Response.Headers);
if (annotationFilter != null)
{
responseMessage.PreferenceAppliedHeader().AnnotationFilter = annotationFilter;
}
Uri baseAddress = GetBaseAddress();
ODataMessageWriterSettings writerSettings = new ODataMessageWriterSettings()
{
BaseUri = baseAddress,
Version = _version,
//MessageWriterSettings
};
writerSettings.ODataUri = new ODataUri
{
ServiceRoot = baseAddress,
// TODO: 1604 Convert webapi.odata's ODataPath to ODL's ODataPath, or use ODL's ODataPath.
SelectAndExpand = Request.ODataFeature().SelectExpandClause,
// TODO: Support $apply
//Apply = Request.ODataFeature().ApplyClause,
Path = (path == null || IsOperationPath(path)) ? null : path.ODLPath,
};
MediaTypeHeaderValue contentType = null;
// TODO: Restore
//if (contentHeaders != null && contentHeaders.ContentType != null)
//{
// contentType = contentHeaders.ContentType;
//}
using (ODataMessageWriter messageWriter = new ODataMessageWriter(responseMessage, writerSettings, model))
{
ODataSerializer serializer = GetSerializer(type, value, model, _context.HttpContext.RequestServices.GetService <IODataSerializerProvider>());
ODataSerializerContext writeContext = new ODataSerializerContext()
{
Context = _context.HttpContext,
Url = urlHelper,
NavigationSource = targetNavigationSource,
Model = model,
RootElementName = GetRootElementName(path) ?? "root",
SkipExpensiveAvailabilityChecks = serializer.ODataPayloadKind == ODataPayloadKind.Collection,
Path = path,
MetadataLevel = ODataMediaTypes.GetMetadataLevel(contentType),
SelectExpandClause = Request.ODataFeature().SelectExpandClause
};
await serializer.WriteObjectAsync(value, type, messageWriter, writeContext);
}
}
private void WriteResponseBody(OutputFormatterWriteContext context)
{
HttpContext httpContext = context.HttpContext;
HttpRequest request = context.HttpContext.Request;
HttpResponse response = context.HttpContext.Response;
IEdmModel model = context.HttpContext.ODataFeature().Model;
if (model == null)
{
throw Error.InvalidOperation(SRResources.RequestMustHaveModel);
}
object value = null;
object graph = null;
var objectResult = context.Object as PageResult <object>;
if (objectResult != null)
{
value = objectResult.Items;
graph = objectResult;
}
else
{
value = context.Object;
graph = value;
}
var type = value.GetType();
ODataSerializer serializer = GetSerializer(type, value, context);
IUrlHelper urlHelper = context.HttpContext.UrlHelper();
ODataPath path = httpContext.ODataFeature().Path;
IEdmNavigationSource targetNavigationSource = path == null ? null : path.NavigationSource;
string preferHeader = RequestPreferenceHelpers.GetRequestPreferHeader(request);
string annotationFilter = null;
if (!String.IsNullOrEmpty(preferHeader))
{
ODataMessageWrapper messageWrapper = new ODataMessageWrapper(response.Body, response.Headers);
messageWrapper.SetHeader(RequestPreferenceHelpers.PreferHeaderName, preferHeader);
annotationFilter = messageWrapper.PreferHeader().AnnotationFilter;
}
IODataResponseMessage responseMessage = new ODataMessageWrapper(response.Body, response.Headers);
if (annotationFilter != null)
{
responseMessage.PreferenceAppliedHeader().AnnotationFilter = annotationFilter;
}
Uri baseAddress = GetBaseAddress(request);
ODataMessageWriterSettings writerSettings = _messageWriterSettings.Clone();
writerSettings.BaseUri = baseAddress;
writerSettings.Version = ODataVersion.V4;
writerSettings.Validations = writerSettings.Validations & ~ValidationKinds.ThrowOnUndeclaredPropertyForNonOpenType;
string metadataLink = urlHelper.CreateODataLink(request, MetadataSegment.Instance);
if (metadataLink == null)
{
throw new SerializationException(SRResources.UnableToDetermineMetadataUrl);
}
writerSettings.ODataUri = new ODataUri
{
ServiceRoot = baseAddress,
// TODO: 1604 Convert webapi.odata's ODataPath to ODL's ODataPath, or use ODL's ODataPath.
SelectAndExpand = httpContext.ODataFeature().SelectExpandClause,
Path = (path == null) ? null : path.ODLPath
//Path = (path == null || IsOperationPath(path)) ? null : path.ODLPath,
};
using (ODataMessageWriter messageWriter = new ODataMessageWriter(responseMessage, writerSettings, model))
{
ODataSerializerContext writeContext = new ODataSerializerContext()
{
Context = context.HttpContext,
Url = urlHelper,
NavigationSource = targetNavigationSource,
Model = model,
RootElementName = GetRootElementName(path) ?? "root",
SkipExpensiveAvailabilityChecks = serializer.ODataPayloadKind == ODataPayloadKind.ResourceSet,
Path = path,
MetadataLevel = ODataMediaTypes.GetMetadataLevel(MediaTypeHeaderValue.Parse(context.ContentType.Value)),
SelectExpandClause = request.ODataFeature().SelectExpandClause,
};
serializer.WriteObject(graph, type, messageWriter, writeContext);
}
}
internal static async Task WriteToStreamAsync(
Type type,
object value,
IEdmModel model,
ODataVersion version,
Uri baseAddress,
MediaTypeHeaderValue contentType,
HttpRequest request,
IHeaderDictionary requestHeaders,
ODataSerializerProvider serializerProvider)
{
if (model == null)
{
throw Error.InvalidOperation(SRResources.RequestMustHaveModel);
}
ODataSerializer serializer = GetSerializer(type, value, request, serializerProvider);
ODataPath path = request.ODataFeature().Path;
IEdmNavigationSource targetNavigationSource = path == null ? null : path.GetNavigationSource();
HttpResponse response = request.HttpContext.Response;
// serialize a response
string preferHeader = RequestPreferenceHelpers.GetRequestPreferHeader(requestHeaders);
string annotationFilter = null;
if (!string.IsNullOrEmpty(preferHeader))
{
ODataMessageWrapper messageWrapper = ODataMessageWrapperHelper.Create(response.Body, response.Headers);
messageWrapper.SetHeader(RequestPreferenceHelpers.PreferHeaderName, preferHeader);
annotationFilter = messageWrapper.PreferHeader().AnnotationFilter;
}
IODataResponseMessageAsync responseMessage = ODataMessageWrapperHelper.Create(new StreamWrapper(response.Body), response.Headers, request.GetSubServiceProvider());
if (annotationFilter != null)
{
responseMessage.PreferenceAppliedHeader().AnnotationFilter = annotationFilter;
}
ODataMessageWriterSettings writerSettings = request.GetWriterSettings();
writerSettings.BaseUri = baseAddress;
writerSettings.Version = version;
writerSettings.Validations = writerSettings.Validations & ~ValidationKinds.ThrowOnUndeclaredPropertyForNonOpenType;
string metadataLink = request.CreateODataLink(MetadataSegment.Instance);
if (metadataLink == null)
{
throw new SerializationException(SRResources.UnableToDetermineMetadataUrl);
}
// Set this variable if the SelectExpandClause is different from the processed clause on the Query options
SelectExpandClause selectExpandDifferentFromQueryOptions = null;
ODataQueryOptions queryOptions = request.GetQueryOptions();
SelectExpandClause processedSelectExpandClause = request.ODataFeature().SelectExpandClause;
if (queryOptions != null && queryOptions.SelectExpand != null)
{
if (queryOptions.SelectExpand.ProcessedSelectExpandClause != processedSelectExpandClause)
{
selectExpandDifferentFromQueryOptions = processedSelectExpandClause;
}
}
else if (processedSelectExpandClause != null)
{
selectExpandDifferentFromQueryOptions = processedSelectExpandClause;
}
writerSettings.ODataUri = new ODataUri
{
ServiceRoot = baseAddress,
// TODO: 1604 Convert webapi.odata's ODataPath to ODL's ODataPath, or use ODL's ODataPath.
SelectAndExpand = processedSelectExpandClause,
Apply = request.ODataFeature().ApplyClause,
//Path = (path == null || IsOperationPath(path)) ? null : path.Path,
Path = path
};
ODataMetadataLevel metadataLevel = ODataMetadataLevel.Minimal;
if (contentType != null)
{
IEnumerable <KeyValuePair <string, string> > parameters =
contentType.Parameters.Select(val => new KeyValuePair <string, string>(val.Name.ToString(),
val.Value.ToString()));
metadataLevel = ODataMediaTypes.GetMetadataLevel(contentType.MediaType.ToString(), parameters);
}
using (ODataMessageWriter messageWriter = new ODataMessageWriter(responseMessage, writerSettings, model))
{
ODataSerializerContext writeContext = BuildSerializerContext(request);
writeContext.NavigationSource = targetNavigationSource;
writeContext.Model = model;
writeContext.RootElementName = GetRootElementName(path) ?? "root";
writeContext.SkipExpensiveAvailabilityChecks = serializer.ODataPayloadKind == ODataPayloadKind.ResourceSet;
writeContext.Path = path;
writeContext.MetadataLevel = metadataLevel;
writeContext.QueryOptions = queryOptions;
//Set the SelectExpandClause on the context if it was explicitly specified.
if (selectExpandDifferentFromQueryOptions != null)
{
writeContext.SelectExpandClause = selectExpandDifferentFromQueryOptions;
}
await serializer.WriteObjectAsync(value, type, messageWriter, writeContext).ConfigureAwait(false);
}
}
private void WriteResponseBody(OutputFormatterWriteContext context)
{
HttpContext httpContext = context.HttpContext;
HttpRequest request = context.HttpContext.Request;
HttpResponse response = context.HttpContext.Response;
IEdmModel model = context.HttpContext.ODataFeature().Model;
if (model == null)
{
throw Error.InvalidOperation(SRResources.RequestMustHaveModel);
}
object value = null;
object graph = null;
var objectResult = context.Object as PageResult <object>;
if (objectResult != null)
{
value = objectResult.Items;
graph = objectResult;
}
else
{
value = context.Object;
graph = value;
}
var type = value.GetType();
ODataSerializer serializer = GetSerializer(type, value, context);
IUrlHelper urlHelper = context.HttpContext.UrlHelper();
ODataPath path = httpContext.ODataFeature().Path;
IEdmNavigationSource targetNavigationSource = path == null ? null : path.NavigationSource;
string preferHeader = RequestPreferenceHelpers.GetRequestPreferHeader(request);
string annotationFilter = null;
if (!String.IsNullOrEmpty(preferHeader))
{
ODataMessageWrapper messageWrapper = new ODataMessageWrapper(response.Body, response.Headers);
messageWrapper.SetHeader(RequestPreferenceHelpers.PreferHeaderName, preferHeader);
annotationFilter = messageWrapper.PreferHeader().AnnotationFilter;
}
IODataResponseMessage responseMessage = new ODataMessageWrapper(response.Body, response.Headers);
if (annotationFilter != null)
{
responseMessage.PreferenceAppliedHeader().AnnotationFilter = annotationFilter;
}
Uri baseAddress = GetBaseAddress(request);
ODataMessageWriterSettings writerSettings = _messageWriterSettings.Clone();
writerSettings.BaseUri = baseAddress;
writerSettings.Version = ODataVersion.V4;
writerSettings.Validations = writerSettings.Validations & ~ValidationKinds.ThrowOnUndeclaredPropertyForNonOpenType;
string metadataLink = urlHelper.CreateODataLink(request, MetadataSegment.Instance);
if (metadataLink == null)
{
throw new SerializationException(SRResources.UnableToDetermineMetadataUrl);
}
writerSettings.ODataUri = new ODataUri
{
ServiceRoot = baseAddress,
// TODO: 1604 Convert webapi.odata's ODataPath to ODL's ODataPath, or use ODL's ODataPath.
SelectAndExpand = httpContext.ODataFeature().SelectExpandClause,
Path = (path == null) ? null : path.ODLPath
//Path = (path == null || IsOperationPath(path)) ? null : path.ODLPath,
};
#region 为OData添加缓存 使用的EF二级缓存 这里是先从缓存获取数据
//var queryResult = graph as IQueryable;
//PageResult<object> target = null;
//if (queryResult == null)
//{
// target = graph as PageResult<object>;
// if (target != null) queryResult = target.Items.AsQueryable();
//}
//var isReadCache = queryResult != null || target != null;
//var cacheValue = isReadCache?queryResult.CacheResult(context.HttpContext.RequestServices):null;
//if (isReadCache&&target != null && cacheValue != null)
//{
// var pageResult = cacheValue as IEnumerable<object>;
// //long? count = target.Count.HasValue ? (long?)pageResult.LongCount() : null;
// cacheValue = new PageResult<object>(pageResult, null, target.Count);
//}
//if (isReadCache&&cacheValue != null) graph = cacheValue;
#endregion
using (ODataMessageWriter messageWriter = new ODataMessageWriter(responseMessage, writerSettings, model))
{
ODataSerializerContext writeContext = new ODataSerializerContext()
{
Context = context.HttpContext,
Url = urlHelper,
NavigationSource = targetNavigationSource,
Model = model,
RootElementName = GetRootElementName(path) ?? "root",
SkipExpensiveAvailabilityChecks = serializer.ODataPayloadKind == ODataPayloadKind.ResourceSet,
Path = path,
MetadataLevel = ODataMediaTypes.GetMetadataLevel(MediaTypeHeaderValue.Parse(context.ContentType.Value)),
SelectExpandClause = request.ODataFeature().SelectExpandClause,
};
serializer.WriteObject(graph, type, messageWriter, writeContext);
#region 这里是往缓存中 存储数据
//if (isReadCache&&cacheValue == null)
//{
// writeContext.Context.Response.Body.Position = 0;
// StreamReader reder = new StreamReader(writeContext.Context.Response.Body);
// var bodyStr = reder.ReadToEnd();
// JObject.Parse(bodyStr).TryGetValue("value",out JToken values);
// cacheValue = values.ToObject(type.MarkListType());
// queryResult.CacheQuerable(cacheValue, writeContext.Context.RequestServices);
//}
#endregion
}
}
