修复webapi在post时bug

examples/WebApi简单示例/WebApiServer/Program.cs

 using System;
 using System.Threading.Tasks;
+using TouchSocket.Core;
 using TouchSocket.Core.Config;
+using TouchSocket.Core.Log;
 using TouchSocket.Core.Plugins;
 using TouchSocket.Http;
 using TouchSocket.Rpc;
@@ -13,6 +15,14 @@ namespace WebApiServerApp
     {
         private static void Main(string[] args)
         {
+            try
+            {
+                Enterprise.ForTest();
+            }
+            catch (Exception)
+            {
+
+            }
             WebApiParserPlugin webApiParser=null;
             HttpService service = new HttpService();
             service.Setup(new TouchSocketConfig()
@@ -39,6 +49,12 @@ namespace WebApiServerApp
 
     public class Server : RpcServer
     {
+        private readonly ILog m_logger;
+
+        public Server(ILog logger)
+        {
+            this.m_logger = logger;
+        }
         [Origin(AllowOrigin ="*")]//跨域设置
         [Router("[api]/[action]ab")]//此路由会以"/Server/Sumab"实现
         [Router("[api]/[action]")]//此路由会以"/Server/Sum"实现
@@ -68,6 +84,22 @@ namespace WebApiServerApp
             }
             return Task.FromResult("id不正确。");
         }
+
+        /// <summary>
+        /// 使用调用上下文，获取实际请求体。
+        /// </summary>
+        /// <param name="callContext"></param>
+        [WebApi(HttpMethodType.POST, MethodFlags = MethodFlags.IncludeCallContext)]
+        [Router("[api]/[action]")]
+        public Task<string> PostContent(IWebApiCallContext callContext)
+        {
+            if (callContext.HttpContext.Request.TryGetContent(out byte[] content))
+            {
+                this.m_logger.Info($"共计：{content.Length}");
+            }
+          
+            return Task.FromResult("ok");
+        }
     }
 
     public class MyClass

src/TouchSocket/Rpc/WebApi/Plugins/WebApiParserPlugin.cs

@@ -200,14 +200,19 @@ namespace TouchSocket.Rpc.WebApi
                 {
                     try
                     {
+                        int index;
                         ps = new object[methodInstance.Parameters.Length];
                         int i = 0;
                         if (methodInstance.MethodFlags.HasFlag(MethodFlags.IncludeCallContext))
                         {
                             ps[i] = callContext;
                             i++;
+                            index = methodInstance.Parameters.Length - 2;
+                        }
+                        else
+                        {
+                            index = methodInstance.Parameters.Length - 1;
                         }
-
                         if (e.Context.Request.Query == null)
                         {
                             for (; i < methodInstance.Parameters.Length - 1; i++)
@@ -231,8 +236,6 @@ namespace TouchSocket.Rpc.WebApi
                             }
                         }
 
-                        int index = methodInstance.Parameters.Length - 1;
-
                         if (index >= 0)
                         {
                             string str = e.Context.Request.GetBody();

src/TouchSocket/TouchSocket.csproj

@@ -4,7 +4,7 @@
 		<ApplicationIcon>logo.ico</ApplicationIcon>
 		<SignAssembly>True</SignAssembly>
 		<AssemblyOriginatorKeyFile>RRQM.pfx</AssemblyOriginatorKeyFile>
-		<Version>0.7.1</Version>
+		<Version>0.7.2</Version>
 		<LangVersion>8.0</LangVersion>
 		<Company>若汝棋茗</Company>
 		<Copyright>Copyright © 2022 若汝棋茗</Copyright>