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using System;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.Threading.Tasks;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Services;
namespace ServiceStack.Host
{
public class RestHandler
{
public string RequestName { get; set; }
public async Task<object> HandleResponseAsync(object response)
{
var taskResponse = response as Task;
if (taskResponse == null)
{
return response;
}
await taskResponse.ConfigureAwait(false);
var taskResult = ServiceStackHost.Instance.GetTaskResult(taskResponse, RequestName);
var subTask = taskResult as Task;
if (subTask != null)
{
taskResult = ServiceStackHost.Instance.GetTaskResult(subTask, RequestName);
}
return taskResult;
}
protected static object CreateContentTypeRequest(IRequest httpReq, Type requestType, string contentType)
{
if (!string.IsNullOrEmpty(contentType) && httpReq.ContentLength > 0)
{
var deserializer = ContentTypes.Instance.GetStreamDeserializer(contentType);
if (deserializer != null)
{
return deserializer(requestType, httpReq.InputStream);
}
}
return ServiceStackHost.Instance.CreateInstance(requestType); //Return an empty DTO, even for empty request bodies
}
protected static object GetCustomRequestFromBinder(IRequest httpReq, Type requestType)
{
Func<IRequest, object> requestFactoryFn;
ServiceStackHost.Instance.ServiceController.RequestTypeFactoryMap.TryGetValue(
requestType, out requestFactoryFn);
return requestFactoryFn != null ? requestFactoryFn(httpReq) : null;
}
public static RestPath FindMatchingRestPath(string httpMethod, string pathInfo, ILogger logger, out string contentType)
{
pathInfo = GetSanitizedPathInfo(pathInfo, out contentType);
return ServiceStackHost.Instance.ServiceController.GetRestPathForRequest(httpMethod, pathInfo, logger);
}
public static string GetSanitizedPathInfo(string pathInfo, out string contentType)
{
contentType = null;
var pos = pathInfo.LastIndexOf('.');
if (pos >= 0)
{
var format = pathInfo.Substring(pos + 1);
contentType = GetFormatContentType(format);
if (contentType != null)
{
pathInfo = pathInfo.Substring(0, pos);
}
}
return pathInfo;
}
private static string GetFormatContentType(string format)
{
//built-in formats
if (format == "json")
return "application/json";
if (format == "xml")
return "application/xml";
return null;
}
public RestPath GetRestPath(string httpMethod, string pathInfo)
{
if (this.RestPath == null)
{
string contentType;
this.RestPath = FindMatchingRestPath(httpMethod, pathInfo, new NullLogger(), out contentType);
if (contentType != null)
ResponseContentType = contentType;
}
return this.RestPath;
}
public RestPath RestPath { get; set; }
// Set from SSHHF.GetHandlerForPathInfo()
public string ResponseContentType { get; set; }
public async Task ProcessRequestAsync(IRequest httpReq, IResponse httpRes, string operationName)
{
var appHost = ServiceStackHost.Instance;
var restPath = GetRestPath(httpReq.Verb, httpReq.PathInfo);
if (restPath == null)
{
throw new NotSupportedException("No RestPath found for: " + httpReq.Verb + " " + httpReq.PathInfo);
}
httpReq.SetRoute(restPath);
if (ResponseContentType != null)
httpReq.ResponseContentType = ResponseContentType;
var request = httpReq.Dto = CreateRequest(httpReq, restPath);
appHost.ApplyRequestFilters(httpReq, httpRes, request);
var rawResponse = await ServiceStackHost.Instance.ServiceController.Execute(request, httpReq).ConfigureAwait(false);
var response = await HandleResponseAsync(rawResponse).ConfigureAwait(false);
appHost.ApplyResponseFilters(httpReq, httpRes, response);
await httpRes.WriteToResponse(httpReq, response).ConfigureAwait(false);
}
public static object CreateRequest(IRequest httpReq, RestPath restPath)
{
var dtoFromBinder = GetCustomRequestFromBinder(httpReq, restPath.RequestType);
if (dtoFromBinder != null)
return dtoFromBinder;
var requestParams = httpReq.GetFlattenedRequestParams();
return CreateRequest(httpReq, restPath, requestParams);
}
public static object CreateRequest(IRequest httpReq, RestPath restPath, Dictionary<string, string> requestParams)
{
var requestDto = CreateContentTypeRequest(httpReq, restPath.RequestType, httpReq.ContentType);
return CreateRequest(httpReq, restPath, requestParams, requestDto);
}
public static object CreateRequest(IRequest httpReq, RestPath restPath, Dictionary<string, string> requestParams, object requestDto)
{
string contentType;
var pathInfo = !restPath.IsWildCardPath
? GetSanitizedPathInfo(httpReq.PathInfo, out contentType)
: httpReq.PathInfo;
return restPath.CreateRequest(pathInfo, requestParams, requestDto);
}
/// <summary>
/// Used in Unit tests
/// </summary>
/// <returns></returns>
public object CreateRequest(IRequest httpReq, string operationName)
{
if (this.RestPath == null)
throw new ArgumentNullException("No RestPath found");
return CreateRequest(httpReq, this.RestPath);
}
}
}
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