Fix POST ctx.ParseBody();

Tesses.WebServer.NetStandard/ServerContext.cs

@@ -5,6 +5,62 @@ using System.Net;
 
 namespace Tesses.WebServer
 {
+    
+internal class SizedStream : Stream
+{
+    Stream strm;
+    long len;
+    long pos=0;
+    public SizedStream(Stream src,long len)
+    {
+        this.strm=src;
+        this.len=len;
+    }
+
+    public override bool CanRead => strm.CanRead;
+
+    public override bool CanSeek => false;
+
+    public override bool CanWrite => strm.CanWrite;
+
+    public override long Length => len;
+
+    public override long Position { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
+
+    public override void Flush()
+    {
+        strm.Flush();
+    }
+
+    public override int Read(byte[] buffer, int offset, int count)
+    {
+        int read=(int)Math.Min(count,len-pos);
+
+        read=strm.Read(buffer,offset,read);
+        pos+=read;
+
+        return read;
+    }
+
+    public override long Seek(long offset, SeekOrigin origin)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override void SetLength(long value)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override void Write(byte[] buffer, int offset, int count)
+    {
+         int read=(int)Math.Min(count,len-pos);
+        pos+=read;
+        strm.Write(buffer,offset,read);
+
+       
+    }
+}
     public class ServerContext
     {
         /// <summary>
@@ -154,5 +210,19 @@ namespace Tesses.WebServer
         /// </summary>
     
         public int StatusCode { get; set; }
+
+        public Stream GetRequestStream()
+        {
+            string len_Str;
+            long len;
+            if(RequestHeaders.TryGetFirst("Content-Length",out len_Str))
+            {
+                if(long.TryParse(len_Str,out len))
+                {
+                     return new SizedStream(NetworkStream,len);
+                }
+            }
+            return NetworkStream;
+        }   
     }
 }