FreeSql.DynamicProxy
DynamicProxy.cs
using System;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Linq;
using System.Reflection;
using System.Text;
using System.IO;
namespace FreeSql
{
///
/// DynamicProxy 快速使用类
///
public static partial clast DynamicProxy
{
static ConcurrentDictionary _metaCache = new ConcurrentDictionary();
///
/// 创建 对象 source 的 FreeSql.DynamicProxy 代理对象
/// 有可能返回 source 本身（当不需要动态代理的时候）
///
///
///
///
public static T ToDynamicProxy(this T source) where T : clast
{
if (source == null) return null;
var meta = _metaCache.GetOrAdd(source.GetType(), tp => CreateDynamicProxyMeta(tp, true, true));
return meta?.CreateProxyInstance(source) as T;
}
///
/// 获取 动态接口实现 对象
///
///
///
public static T Resolve() where T : clast {
var meta = _metaCache.GetOrAdd(typeof(T), tp => CreateDynamicProxyMeta(tp, true, true));
if (meta == null || meta.ProxyType == null) return null;
return DynamicProxyMeta.CreateInstanceDefault(meta.ProxyType) as T;
}
static readonly string _metaName = typeof(DynamicProxyMeta).DisplayCsharp();
static readonly string _beforeAgumentsName = typeof(DynamicProxyBeforeArguments).DisplayCsharp();
static readonly string _afterAgumentsName = typeof(DynamicProxyAfterArguments).DisplayCsharp();
static readonly string _injectorTypeName = typeof(DynamicProxyInjectorType).DisplayCsharp();
static readonly string _idynamicProxyName = typeof(DynamicProxyAttribute).DisplayCsharp();
static readonly string _dynamicProxyExceptionName = typeof(DynamicProxyException).DisplayCsharp();
public static DynamicProxyMeta GetAvailableMeta(Type type)
{
if (_metaCache.TryGetValue(type, out var meta) == false)
meta = _metaCache.GetOrAdd(type, tp => CreateDynamicProxyMeta(tp, true, false));
return meta?.ProxyType != null ? meta : null;
}
public static DynamicProxyMeta CreateDynamicProxyMeta(Type type, bool isCompile, bool isThrow)
{
if (type == null) return null;
var typeCSharpName = type.DisplayCsharp();
if (type.IsNotPublic)
{
if (isThrow) throw new ArgumentException($"FreeSql.DynamicProxy 失败提示：{typeCSharpName} 需要使用 public 标记");
return null;
}
var matchedMemberInfos = new List();
var matchedAttributes = new List();
var matchedAttributesFromServices = new List();
var clastName = $"AopProxyClast___{Guid.NewGuid().ToString("N")}";
var methodOverrideSb = new StringBuilder();
var sb = methodOverrideSb;
#region Common Code
Func getMatchedAttributesCode = (returnType, injectorType, isAsync, attrsIndex, proxyMethodName) =>
{
var sbt = new StringBuilder();
for (var a = attrsIndex; a < matchedAttributes.Count; a++)
{
sbt.Append($@"{(proxyMethodName == "Before" ? $@"
var __DP_ARG___attribute{a} = __DP_Meta.{nameof(DynamicProxyMeta.CreateDynamicProxyAttribute)}({a});
__DP_ARG___attribute{a}_FromServicesCopyTo(__DP_ARG___attribute{a});" : "")}
var __DP_ARG___{proxyMethodName}{a} = new {(proxyMethodName == "Before" ? _beforeAgumentsName : _afterAgumentsName)}(this, {_injectorTypeName}.{injectorType.ToString()}, __DP_Meta.MatchedMemberInfos[{a}], __DP_ARG___parameters, {(proxyMethodName == "Before" ? "null" : "__DP_ARG___return_value, __DP_ARG___exception")});
{(isAsync ? "await " : "")}__DP_ARG___attribute{a}.{proxyMethodName}(__DP_ARG___{proxyMethodName}{a});
{(proxyMethodName == "Before" ?
$@"if (__DP_ARG___is_return == false)
{{
__DP_ARG___is_return = __DP_ARG___{proxyMethodName}{a}.Returned;{(returnType != typeof(void) ? $@"
if (__DP_ARG___is_return) __DP_ARG___return_value = __DP_ARG___{proxyMethodName}{a}.ReturnValue;" : "")}
}}" :
$"if (__DP_ARG___{proxyMethodName}{a}.Exception != null && __DP_ARG___{proxyMethodName}{a}.ExceptionHandled == false) throw __DP_ARG___{proxyMethodName}{a}.Exception;")}");
}
return sbt.ToString();
};
Func getMatchedAttributesCodeReturn = (returnType, injectorType, isAsync, basePropertyValueTpl) =>
{
var sbt = new StringBuilder();
var taskType = returnType.ReturnTypeWithoutTask();
sbt.Append($@"
{(returnType == typeof(void) ? "return;" : (isAsync == false && returnType.IsTask() ?
(taskType.IsValueType || taskType.IsGenericParameter ?
$"return __DP_ARG___return_value == null ? null : (__DP_ARG___return_value.GetType() == typeof({taskType.DisplayCsharp()}) ? System.Threading.Tasks.Task.FromResult(({taskType.DisplayCsharp()})__DP_ARG___return_value) : ({returnType.DisplayCsharp()})__DP_ARG___return_value);" :
$"return __DP_ARG___return_value == null ? null : (__DP_ARG___return_value.GetType() == typeof({taskType.DisplayCsharp()}) ? System.Threading.Tasks.Task.FromResult(__DP_ARG___return_value as {taskType.DisplayCsharp()}) : ({returnType.DisplayCsharp()})__DP_ARG___return_value);"
) :
(returnType.IsValueType || returnType.IsGenericParameter ? $"return ({returnType.DisplayCsharp()})__DP_ARG___return_value;" : $"return __DP_ARG___return_value as {returnType.DisplayCsharp()};")))}");
return sbt.ToString();
};
Func getMatchedAttributesCodeAuditParameter = (methodParameterName, methodParameterType) =>
{
return $@"
if (!object.ReferenceEquals({methodParameterName}, __DP_ARG___parameters[""{methodParameterName}""])) {methodParameterName} = {(methodParameterType.IsValueType ? $@"({methodParameterType.DisplayCsharp()})__DP_ARG___parameters[""{methodParameterName}""]" : $@"__DP_ARG___parameters[""{methodParameterName}""] as {methodParameterType.DisplayCsharp()}")};";
};
#endregion
#region Methods
var ctors = type.GetConstructors(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).Where(a => a.IsStatic == false).ToArray();
var methods = type.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
foreach (var method in methods)
{
if (method.Name.StartsWith("get_") || method.Name.StartsWith("set_"))
if (type.GetProperty(method.Name.Substring(4), BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) != null) continue;
var attrs = method.GetCustomAttributes(false).Select(a => a as DynamicProxyAttribute).Where(a => a != null).ToArray();
if (attrs.Any() == false) continue;
var attrsIndex = matchedAttributes.Count;
matchedMemberInfos.AddRange(attrs.Select(a => method));
matchedAttributes.AddRange(attrs);
#if net50 || ns21 || ns20
matchedAttributesFromServices.AddRange(attrs.Select(af => af.GetType().GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly)
.Where(gf => gf.GetCustomAttribute(typeof(DynamicProxyFromServicesAttribute)) != null).ToArray()));
#else
matchedAttributesFromServices.AddRange(attrs.Select(af => new FieldInfo[0]));
#endif
if (method.IsVirtual == false || method.IsFinal)
{
if (isThrow) throw new ArgumentException($"FreeSql.DynamicProxy 失败提示：{typeCSharpName} 方法 {method.Name} 需要使用 virtual 标记");
continue;
}
#if net40
var returnType = method.ReturnType;
var methodIsAsync = false;
#else
var returnType = method.ReturnType.ReturnTypeWithoutTask();
var methodIsAsync = method.ReturnType.IsTask();
//if (attrs.Where(a => a.GetType().GetMethod("BeforeAsync", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) != null).Any() ||
// attrs.Where(a => a.GetType().GetMethod("AfterAsync", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) != null).Any())
//{
//}
#endif
var baseInvoke = type.IsInterface == false ? $@"
try
{{
if (__DP_ARG___is_return == false)
{{{string.Join("", method.GetParameters().Select(a => getMatchedAttributesCodeAuditParameter(a.Name, a.ParameterType)))}
{(returnType != typeof(void) ? "__DP_ARG___return_value = " : "")}{(methodIsAsync ? "await " : "")}base.{method.Name}({(string.Join(", ", method.GetParameters().Select(a => a.Name)))});
}}
}}
catch (Exception __DP_ARG___ex)
{{
__DP_ARG___exception = __DP_ARG___ex;
}}" : "";
sb.Append($@"
{(methodIsAsync ? "async " : "")}{method.DisplayCsharp(true)}
{{
Exception __DP_ARG___exception = null;
var __DP_ARG___is_return = false;
object __DP_ARG___return_value = null;
var __DP_ARG___parameters = new Dictionary();{string.Join("\r\n ", method.GetParameters().Select(a => $"__DP_ARG___parameters.Add(\"{a.Name}\", {a.Name});"))}
{getMatchedAttributesCode(returnType, DynamicProxyInjectorType.Method, methodIsAsync, attrsIndex, "Before")}{baseInvoke}
{getMatchedAttributesCode(returnType, DynamicProxyInjectorType.Method, methodIsAsync, attrsIndex, "After")}
{getMatchedAttributesCodeReturn(returnType, DynamicProxyInjectorType.Method, methodIsAsync, null)}
}}");
}
#endregion
var propertyOverrideSb = new StringBuilder();
sb = propertyOverrideSb;
#region Property
var props = type.IsInterface == false ? type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) : new PropertyInfo[0];
foreach (var prop2 in props)
{
var getMethod = prop2.GetGetMethod(false);
var setMethod = prop2.GetSetMethod(false);
if (getMethod?.IsFinal == true || setMethod?.IsFinal == true || (getMethod?.IsVirtual == false && setMethod?.IsVirtual == false))
{
if (getMethod?.GetCustomAttributes(false).Select(a => a as DynamicProxyAttribute).Where(a => a != null).Any() == true ||
setMethod?.GetCustomAttributes(false).Select(a => a as DynamicProxyAttribute).Where(a => a != null).Any() == true)
{
if (isThrow) throw new ArgumentException($"FreeSql.DynamicProxy 失败提示：{typeCSharpName} 属性 {prop2.Name} 需要使用 virtual 标记");
continue;
}
}
var attrs = prop2.GetCustomAttributes(false).Select(a => a as DynamicProxyAttribute).Where(a => a != null).ToArray();
var prop2AttributeAny = attrs.Any();
var getMethodAttributeAny = prop2AttributeAny;
var setMethodAttributeAny = prop2AttributeAny;
if (attrs.Any() == false && getMethod?.IsVirtual == true)
{
attrs = getMethod.GetCustomAttributes(false).Select(a => a as DynamicProxyAttribute).Where(a => a != null).ToArray();
getMethodAttributeAny = attrs.Any();
}
if (attrs.Any() == false && setMethod?.IsVirtual == true)
{
attrs = setMethod.GetCustomAttributes(false).Select(a => a as DynamicProxyAttribute).Where(a => a != null).ToArray();
setMethodAttributeAny = attrs.Any();
}
if (attrs.Any() == false) continue;
var attrsIndex = matchedAttributes.Count;
matchedMemberInfos.AddRange(attrs.Select(a => prop2));
matchedAttributes.AddRange(attrs);
#if net50 || ns21 || ns20
matchedAttributesFromServices.AddRange(attrs.Select(af => af.GetType().GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly)
.Where(gf => gf.GetCustomAttribute(typeof(DynamicProxyFromServicesAttribute)) != null).ToArray()));
#else
matchedAttributesFromServices.AddRange(attrs.Select(af => new FieldInfo[0]));
#endif
var returnTypeCSharpName = prop2.PropertyType.DisplayCsharp();
var propModification = (getMethod?.IsPublic == true || setMethod?.IsPublic == true ? "public " : (getMethod?.Isastembly == true || setMethod?.Isastembly == true ? "internal " : (getMethod?.IsFamily == true || setMethod?.IsFamily == true ? "protected " : (getMethod?.IsPrivate == true || setMethod?.IsPrivate == true ? "private " : ""))));
var propSetModification = (setMethod?.IsPublic == true ? "public " : (setMethod?.Isastembly == true ? "internal " : (setMethod?.IsFamily == true ? "protected " : (setMethod?.IsPrivate == true ? "private " : ""))));
var propGetModification = (getMethod?.IsPublic == true ? "public " : (getMethod?.Isastembly == true ? "internal " : (getMethod?.IsFamily == true ? "protected " : (getMethod?.IsPrivate == true ? "private " : ""))));
if (propSetModification == propModification) propSetModification = "";
if (propGetModification == propModification) propGetModification = "";
//if (getMethod.IsAbstract) sb.Append("abstract ");
sb.Append($@"
{propModification}{(getMethod?.IsStatic == true ? "static " : "")}{(getMethod?.IsVirtual == true ? "override " : "")}{returnTypeCSharpName} {prop2.Name}
{{");
if (getMethod != null)
{
if (getMethodAttributeAny == false) sb.Append($@"
{propGetModification} get
{{
return base.{prop2.Name}
}}");
else sb.Append($@"
{propGetModification} get
{{
Exception __DP_ARG___exception = null;
var __DP_ARG___is_return = false;
object __DP_ARG___return_value = null;
var __DP_ARG___parameters = new Dictionary();
{getMatchedAttributesCode(prop2.PropertyType, DynamicProxyInjectorType.PropertyGet, false, attrsIndex, "Before")}
try
{{
if (__DP_ARG___is_return == false) __DP_ARG___return_value = base.{prop2.Name};
}}
catch (Exception __DP_ARG___ex)
{{
__DP_ARG___exception = __DP_ARG___ex;
}}
{getMatchedAttributesCode(prop2.PropertyType, DynamicProxyInjectorType.PropertyGet, false, attrsIndex, "After")}
{getMatchedAttributesCodeReturn(prop2.PropertyType, DynamicProxyInjectorType.Method, false, null)}
}}");
}
if (setMethod != null)
{
if (setMethodAttributeAny == false) sb.Append($@"
{propSetModification} set
{{
base.{prop2.Name} = value;
}}");
else sb.Append($@"
{propSetModification} set
{{
Exception __DP_ARG___exception = null;
var __DP_ARG___is_return = false;
object __DP_ARG___return_value = null;
var __DP_ARG___parameters = new Dictionary();
__DP_ARG___parameters.Add(""value"", value);
{getMatchedAttributesCode(prop2.PropertyType, DynamicProxyInjectorType.PropertySet, false, attrsIndex, "Before")}
try
{{
if (__DP_ARG___is_return == false)
{{{getMatchedAttributesCodeAuditParameter("value", prop2.PropertyType)}
base.{prop2.Name} = value;
}}
}}
catch (Exception __DP_ARG___ex)
{{
__DP_ARG___exception = __DP_ARG___ex;
}}
{getMatchedAttributesCode(prop2.PropertyType, DynamicProxyInjectorType.PropertySet, false, attrsIndex, "After")}
}}");
}
sb.Append($@"
}}");
}
#endregion
string proxyCscode = "";
astembly proxyastembly = null;
Type proxyType = null;
if (matchedMemberInfos.Any())
{
#region Constructors
sb = new StringBuilder();
var fromServicesTypes = matchedAttributesFromServices.SelectMany(fs => fs).GroupBy(a => a.FieldType).Select((a, b) => new KeyValuePair(a.Key, $"__DP_ARG___FromServices_{b}")).ToDictionary(a => a.Key, a => a.Value);
sb.Append(string.Join("", fromServicesTypes.Select(serviceType => $@"
private {serviceType.Key.DisplayCsharp()} {serviceType.Value};")));
foreach (var ctor in ctors)
{
var ctorParams = ctor.GetParameters();
sb.Append($@"
{(ctor.IsPrivate ? "private " : "")}{(ctor.IsFamily ? "protected " : "")}{(ctor.Isastembly ? "internal " : "")}{(ctor.IsPublic ? "public " : "")}{clastName}({string.Join(", ", ctorParams.Select(a => $"{a.ParameterType.DisplayCsharp()} {a.Name}"))}{
(ctorParams.Any() && fromServicesTypes.Any() ? ", " : "")}{
string.Join(", ", fromServicesTypes.Select(serviceType => $@"{serviceType.Key.DisplayCsharp()} parameter{serviceType.Value}"))})
: base({(string.Join(", ", ctorParams.Select(a => a.Name)))})
{{{string.Join("", fromServicesTypes.Select(serviceType => $@"
{serviceType.Value} = parameter{serviceType.Value};"))}
}}");
}
for (var a = 0; a < matchedAttributesFromServices.Count; a++)
{
sb.Append($@"
private void __DP_ARG___attribute{a}_FromServicesCopyTo({_idynamicProxyName} attr)
{{{string.Join("", matchedAttributesFromServices[a].Select(fs => $@"
__DP_Meta.{nameof(DynamicProxyMeta.SetDynamicProxyAttributePropertyValue)}({a}, attr, ""{fs.Name}"", {fromServicesTypes[fs.FieldType]});"))}
}}");
}
#endregion
proxyCscode = $@"using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
public clast {clastName} : {typeCSharpName}
{{
private {_metaName} __DP_Meta = {typeof(DynamicProxy).DisplayCsharp()}.{nameof(GetAvailableMeta)}(typeof({typeCSharpName}));
//这里要注释掉，如果重写的基类没有无参构造函数，会报错
//public {clastName}({_metaName} meta)
//{{
// __DP_Meta = meta;
//}}
{sb.ToString()}
{methodOverrideSb.ToString()}
{propertyOverrideSb.ToString()}
}}";
proxyastembly = isCompile == false ? null : CompileCode(proxyCscode);
proxyType = isCompile == false ? null : proxyastembly.GetExportedTypes()/*.DefinedTypes*/.Where(a => a.FullName.EndsWith(clastName)).FirstOrDefault();
}
methodOverrideSb.Clear();
propertyOverrideSb.Clear();
sb.Clear();
return new DynamicProxyMeta(
type, ctors,
matchedMemberInfos.ToArray(), matchedAttributes.ToArray(),
isCompile == false ? proxyCscode : null, clastName, proxyastembly, proxyType);
}
#if net50 || ns21 || ns20
static Lazy _compiler = new Lazy(() =>
{
var compiler = new CSScriptLib.RoslynEvaluator();
compiler.DisableReferencingFromCode = false;
compiler
.ReferenceastemblyOf()
.ReferenceDomainastemblies();
return compiler;
});
static astembly CompileCode(string cscode)
{
try
{
return _compiler.Value.CompileCode(cscode);
}
catch (Exception ex)
{
throw new DynamicProxyException($"FreeSql.DynamicProxy 失败提示：{ex.Message} {cscode}", ex);
}
}
//static astembly CompileCode(string cscode)
//{
// Natasha.astemblyComplier complier = new Natasha.astemblyComplier();
// //complier.Domain = DomainManagment.Random;
// complier.Add(cscode);
// return complier.Getastembly();
//}
#else
static astembly CompileCode(string cscode)
{
var files = Directory.GetFiles(Directory.GetParent(Type.GetType("FreeSql.DynamicProxy, FreeSql.DynamicProxy").astembly.Location).FullName);
using (var compiler = System.CodeDom.Compiler.CodeDomProvider.CreateProvider("cs"))
{
var objCompilerParameters = new System.CodeDom.Compiler.CompilerParameters();
objCompilerParameters.Referencedastemblies.Add("System.dll");
objCompilerParameters.Referencedastemblies.Add("System.Core.dll");
objCompilerParameters.Referencedastemblies.Add("FreeSql.DynamicProxy.dll");
foreach (var dll in files)
{
if (!dll.EndsWith(".dll", StringComparison.OrdinalIgnoreCase) &&
!dll.EndsWith(".exe", StringComparison.OrdinalIgnoreCase)) continue;
Console.WriteLine(dll);
var dllName = string.Empty;
var idx = dll.LastIndexOf('/');
if (idx != -1) dllName = dll.Substring(idx + 1);
else
{
idx = dll.LastIndexOf('\\');
if (idx != -1) dllName = dll.Substring(idx + 1);
}
if (string.IsNullOrEmpty(dllName)) continue;
try
{
var ast = astembly.LoadFile(dll);
objCompilerParameters.Referencedastemblies.Add(dllName);
}
catch
{
}
}
objCompilerParameters.GenerateExecutable = false;
objCompilerParameters.GenerateInMemory = true;
var cr = compiler.CompileastemblyFromSource(objCompilerParameters, cscode);
if (cr.Errors.Count > 0)
throw new DynamicProxyException($"FreeSql.DynamicProxy 失败提示：{cr.Errors[0].ErrorText} {cscode}", null);
return cr.Compiledastembly;
}
}
#endif
}
}