WIP
Harald Wolff
parent
0509cc37c0
commit
7c0987e424
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@ -0,0 +1,296 @@
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// /**
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// * File: JsonCallResource.cs
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// * Author: haraldwolff
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// *
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// * This file and it's content is copyrighted by the Author and / or copyright holder.
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// * Any use wihtout proper permission is illegal and may lead to legal actions.
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// *
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// *
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// **/
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using System;
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using System.Reflection;
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using System.Collections.Generic;
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using Newtonsoft.Json;
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using ln.http.exceptions;
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using ln.logging;
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using Newtonsoft.Json.Linq;
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using System.Runtime.CompilerServices;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Diagnostics;
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namespace ln.http.resources
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{
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public abstract class ReflectiveResource : Resource
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{
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public override bool HandlesDispatching => true;
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Dictionary<string, MethodInfo[]> callableMethods = new Dictionary<string, MethodInfo[]>();
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Dictionary<string, PropertyInfo> properties = new Dictionary<string, PropertyInfo>();
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Dictionary<string, ReflectiveResource> reflectiveResources = new Dictionary<string, ReflectiveResource>();
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public ReflectiveResource(Resource container, string name,object o)
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: base(container, name)
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{
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initialize();
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}
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private void initialize()
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{
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Dictionary<string, List<MethodInfo>> callables = new Dictionary<string, List<MethodInfo>>();
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foreach (MethodInfo methodInfo in this.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic))
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{
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CallableAttribute callableAttribute = methodInfo.GetCustomAttribute<CallableAttribute>();
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if (callableAttribute != null)
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{
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string alias = callableAttribute.Alias == null ? methodInfo.Name : callableAttribute.Alias;
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if (!callables.ContainsKey(alias))
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{
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callables.Add(alias, new List<MethodInfo>());
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}
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callables[alias].Add(methodInfo);
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}
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}
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foreach (String alias in callables.Keys)
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{
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callableMethods.Add(alias, callables[alias].ToArray());
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new MethodResource(this, alias);
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}
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foreach (PropertyInfo propertyInfo in this.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public))
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{
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if (propertyInfo.GetCustomAttribute<CallableAttribute>() != null)
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{
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new CallableProperty(this, propertyInfo);
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}
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}
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}
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private object InvokeMethodCall(string methodName, object[] arguments)
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{
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Stopwatch stopwatch = new Stopwatch();
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stopwatch.Start();
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MethodInfo methodInfo = FindMethodSignature(methodName, arguments.Length);
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object result = methodInfo.Invoke(this, arguments);
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stopwatch.Stop();
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Logging.Log(LogLevel.DEBUGDETAIL,"InvokeMethodCall({0},...): {1}ms",methodName,stopwatch.ElapsedMilliseconds);
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return result;
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}
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private object InvokeMethodCall(string methodName, KeyValuePair<string,object>[] arguments)
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{
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MethodInfo methodInfo = FindMethodSignature(methodName, arguments.Select((kvp) => kvp.Key).ToArray());
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Dictionary<string, object> args = new Dictionary<string, object>();
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foreach (KeyValuePair<string,object> kvp in arguments)
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args.Add(kvp.Key, kvp.Value);
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ParameterInfo[] parameterInfos = methodInfo.GetParameters();
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object[] pl = new object[parameterInfos.Length];
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for (int n=0;n<parameterInfos.Length;n++)
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pl[n] = args[parameterInfos[n].Name];
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Stopwatch stopwatch = new Stopwatch();
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stopwatch.Start();
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object result = methodInfo.Invoke(this, pl);
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stopwatch.Stop();
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Logging.Log(LogLevel.DEBUGDETAIL, "InvokeMethodCall({0},...): {1}ms", methodName, stopwatch.ElapsedMilliseconds);
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return result;
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}
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private MethodInfo FindMethodSignature(String methodName,int nParameters)
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{
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foreach (MethodInfo methodInfo in callableMethods[methodName])
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{
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if (nParameters == methodInfo.GetParameters().Length)
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{
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return methodInfo;
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}
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}
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throw new ArgumentException("No method signature matching the parameters was found");
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}
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private MethodInfo FindMethodSignature(String methodName, String[] argumentNames)
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{
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foreach (MethodInfo methodInfo in callableMethods[methodName])
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{
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ParameterInfo[] parameterInfos = methodInfo.GetParameters();
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if (parameterInfos.Length == argumentNames.Length)
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{
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int n;
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for (n = 0; n < parameterInfos.Length; n++)
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{
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if (!argumentNames.Contains(parameterInfos[n].Name))
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break;
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}
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if (n == argumentNames.Length)
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return methodInfo;
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}
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}
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throw new ArgumentException("No method signature matching the parameters was found");
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}
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public override HttpResponse GetResponse(HttpRequest httpRequest)
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{
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if (!httpRequest.GetRequestHeader("Content-Type").Equals("application/json"))
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{
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throw new HttpException("JSON Method call failed, call object not received");
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}
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MethodCall methodCall = JsonConvert.DeserializeObject<MethodCall>(httpRequest.ContentReader.ReadToEnd());
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MethodResult methodResult;
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try
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{
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methodResult = new MethodResult();
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methodResult.MethodName = methodCall.MethodName;
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methodResult.Result = InvokeMethodCall(methodCall.MethodName, methodCall.Parameters);
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} catch (Exception e)
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{
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methodResult = new MethodResult();
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methodResult.MethodName = methodCall.MethodName;
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methodResult.Exception = e;
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Logging.Log(LogLevel.ERROR, "JsonCallResource: method call caught exception: {0}",e);
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Logging.Log(e);
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}
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String result = JsonConvert.SerializeObject(methodResult);
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HttpResponse httpResponse = new HttpResponse(httpRequest);
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httpResponse.SetHeader("content-type", "application/json");
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httpResponse.ContentWriter.Write(result);
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return httpResponse;
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}
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private string SerializeResult(MethodInfo methodInfo,MethodResult methodResult)
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{
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if (methodResult.Exception != null)
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{
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return JsonConvert.SerializeObject(methodResult);
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}
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else
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{
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return FlatSerializeResult(methodResult);
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}
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}
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private string FlatSerializeResult(MethodResult methodResult)
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{
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JObject jMethodResult = new JObject();
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jMethodResult.Add("Exception", null);
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jMethodResult.Add("MethodName", methodResult.MethodName);
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JObject jResult = new JObject();
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jMethodResult.Add("Result", jResult);
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Type type = methodResult.GetType();
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foreach (FieldInfo fieldInfo in type.GetFields(BindingFlags.Public | BindingFlags.Instance))
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{
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Type fType = fieldInfo.FieldType;
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if ((fType.IsValueType) || (typeof(string).Equals(fType)) || (fType.IsArray))
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{
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jResult.Add(fieldInfo.Name, new JValue(fieldInfo.GetValue(methodResult.Result)));
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}
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else
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{
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jResult.Add(fieldInfo.Name, new JValue(fieldInfo.GetValue(methodResult.Result).ToString()));
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}
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}
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return jMethodResult.ToString();
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}
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class MethodCall
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{
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public String MethodName;
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public object[] Parameters;
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}
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class MethodResult
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{
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public String MethodName;
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public object Result;
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public Exception Exception;
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}
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class MethodResource : Resource
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{
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public MethodResource(JsonCallResource container,String methodName)
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:base(container,methodName)
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{
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}
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public override HttpResponse GetResponse(HttpRequest httpRequest)
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{
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throw new NotImplementedException();
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}
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public override void AddResource(Resource resource) => throw new NotImplementedException();
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public override bool Contains(string name) => throw new NotImplementedException();
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public override IEnumerable<Resource> GetResources() => throw new NotImplementedException();
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public override void RemoveResource(Resource resource) => throw new NotImplementedException();
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}
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class CallableProperty : Resource
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{
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public CallableProperty(JsonCallResource container, PropertyInfo propertyInfo)
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: base(container, propertyInfo.Name)
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{
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this.propertyInfo = propertyInfo;
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}
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PropertyInfo propertyInfo;
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public override void AddResource(Resource resource) => throw new NotImplementedException();
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public override void RemoveResource(Resource resource) => throw new NotImplementedException();
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public override bool Contains(string name) => false;
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public override IEnumerable<Resource> GetResources() => new Resource[0];
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public override HttpResponse GetResponse(HttpRequest httpRequest)
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{
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try
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{
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object v = propertyInfo.GetValue(Container);
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String result = JsonConvert.SerializeObject(v);
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HttpResponse httpResponse = new HttpResponse(httpRequest);
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httpResponse.SetHeader("content-type", "application/json");
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httpResponse.ContentWriter.Write(result);
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return httpResponse;
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} catch (Exception e)
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{
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Logging.Log(e);
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HttpResponse httpResponse = new HttpResponse(httpRequest);
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httpResponse.StatusCode = 500;
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return httpResponse;
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}
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}
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}
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}
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}
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@ -10,6 +10,8 @@ namespace ln.http.resources
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public Resource Container { get; protected set; }
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public Resource DefaultResource { get; set; }
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public virtual bool HandlesDispatching => false;
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public Resource(String name)
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{
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Name = name;
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@ -43,6 +43,8 @@
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<Compile Include="BaseResource.cs" />
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<Compile Include="TemplateResource.cs" />
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<Compile Include="JsonCallResource.cs" />
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<Compile Include="ReflectiveResource.cs" />
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<Compile Include="reflection\Reflector.cs" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\ln.http\ln.http.csproj">
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@ -61,5 +63,8 @@
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<ItemGroup>
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<None Include="packages.config" />
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</ItemGroup>
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<ItemGroup>
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<Folder Include="reflection\" />
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</ItemGroup>
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<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
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</Project>
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@ -0,0 +1,60 @@
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using System;
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using System.Collections.Generic;
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using System.Reflection;
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namespace ln.http.resources.reflection
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{
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public class Reflector
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{
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Type TargetType { get; }
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Dictionary<string, PropertyInfo> properties = new Dictionary<string, PropertyInfo>();
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Dictionary<string, MethodInfo> methods = new Dictionary<string, MethodInfo>();
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public Reflector(Type targetType)
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{
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TargetType = targetType;
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Initialize();
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}
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private void Initialize()
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{
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foreach (PropertyInfo propertyInfo in TargetType.GetProperties(BindingFlags.Public | BindingFlags.Instance))
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{
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if (propertyInfo.GetCustomAttribute<CallableAttribute>() != null)
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{
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properties.Add(propertyInfo.Name, propertyInfo);
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}
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}
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foreach (MethodInfo methodInfo in TargetType.GetMethods(BindingFlags.Public | BindingFlags.Instance))
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{
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if (methodInfo.GetCustomAttribute<CallableAttribute>() != null)
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{
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methods.Add(methodInfo.Name, methodInfo);
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}
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}
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}
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public object InvokeRequest(HttpRequest httpRequest,Queue<string> pathStack,object currentValue)
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{
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if (pathStack.Count == 0)
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return currentValue;
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throw new NotImplementedException();
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}
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static Dictionary<Type, Reflector> reflectorsCache = new Dictionary<Type, Reflector>();
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public static Reflector GetReflector(Type targetType)
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{
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if (!reflectorsCache.ContainsKey(targetType))
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{
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reflectorsCache[targetType] = new Reflector(targetType);
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}
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return reflectorsCache[targetType];
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}
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}
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}
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