Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Services/System/Web/Services/Protocols/SoapExtensionStream.cs

@@ -0,0 +1,153 @@
+//------------------------------------------------------------------------------
+// <copyright file="SoapExtensionStream.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.Services.Protocols {
+    using System;
+    using System.IO;
+    using System.Web.Services;
+
+    internal class SoapExtensionStream : Stream {
+        internal Stream innerStream;
+        bool hasWritten = false;
+        bool streamReady;
+
+        internal SoapExtensionStream() {
+        }
+
+        private bool EnsureStreamReady() {
+            if (streamReady) return true;
+            throw new InvalidOperationException(Res.GetString(Res.WebBadStreamState));            
+        }
+
+        public override bool CanRead {
+            get {
+                EnsureStreamReady();
+                return innerStream.CanRead;
+            }
+        }
+
+        public override bool CanSeek {
+            get {
+                EnsureStreamReady();
+                return innerStream.CanSeek;
+            }
+        }
+
+        public override bool CanWrite {
+            get {
+                EnsureStreamReady();
+                return innerStream.CanWrite;
+            }
+        }
+
+        internal bool HasWritten
+        {
+            get { return this.hasWritten; }
+        }
+
+        public override long Length
+        {
+            get {
+                EnsureStreamReady();
+                return innerStream.Length;
+            }
+        }
+
+        public override long Position {
+            get {
+                EnsureStreamReady();
+                return innerStream.Position;
+            }
+            set {
+                EnsureStreamReady();
+                this.hasWritten = true;
+                innerStream.Position = value;
+            }
+        }
+
+        protected override void Dispose(bool disposing) {
+            try {
+                if (disposing) {
+                    EnsureStreamReady();
+                    this.hasWritten = true;
+                    innerStream.Close();
+                }
+            }
+            finally {
+                base.Dispose(disposing);
+            }
+        }
+
+        public override void Flush() {
+            EnsureStreamReady();
+            this.hasWritten = true;
+            innerStream.Flush();
+        }
+
+        public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, Object state) {
+            EnsureStreamReady();
+            return innerStream.BeginRead(buffer, offset, count, callback, state);
+        }
+
+        public override int EndRead(IAsyncResult asyncResult) {
+            EnsureStreamReady();
+            return innerStream.EndRead(asyncResult);
+        }
+
+        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, Object state) {
+            EnsureStreamReady();
+            this.hasWritten = true;
+            return innerStream.BeginWrite(buffer, offset, count, callback, state);
+        }
+
+        public override void EndWrite(IAsyncResult asyncResult) {
+            EnsureStreamReady();
+            this.hasWritten = true;
+            innerStream.EndWrite(asyncResult);
+        }
+
+        public override long Seek(long offset, SeekOrigin origin) {
+            EnsureStreamReady();
+            return innerStream.Seek(offset, origin);
+        }
+
+        public override void SetLength(long value) {
+            EnsureStreamReady();
+            innerStream.SetLength(value);
+        }
+
+        public override int Read(byte[] buffer, int offset, int count) {
+            EnsureStreamReady();
+            return innerStream.Read(buffer, offset, count);
+        }
+
+        public override int ReadByte() {
+            EnsureStreamReady();
+            return innerStream.ReadByte();
+        }
+
+        public override void Write(byte[] buffer, int offset, int count) {
+            EnsureStreamReady();
+            this.hasWritten = true;
+            innerStream.Write(buffer, offset, count);
+        }
+
+        public override void WriteByte(byte value) {
+            EnsureStreamReady();
+            this.hasWritten = true;
+            innerStream.WriteByte(value);
+        }
+
+        internal void SetInnerStream(Stream stream) {
+            innerStream = stream;
+            this.hasWritten = false;
+        }
+
+        internal void SetStreamReady() {
+            streamReady = true;
+        }
+    }
+}