allow to set custom response body on redirect

Author: honfika

Titanium.Web.Proxy/Http/RequestResponseBase.cs

@@ -173,7 +173,7 @@ internal byte[] GetCompressedBody(string encodingType, byte[] body)
 
         internal byte[] CompressBodyAndUpdateContentLength()
         {
-            if (!IsBodyRead)
+            if (!IsBodyRead && BodyInternal == null)
             {
                 return null;
             }

Titanium.Web.Proxy/Http/Response.cs

@@ -128,6 +128,21 @@ public override string HeaderText
             }
         }
 
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public Response()
+        {
+        }
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public Response(byte[] body)
+        {
+            Body = body;
+        }
+
         internal static string CreateResponseLine(Version version, int statusCode, string statusDescription)
         {
             return $"HTTP/{version.Major}.{version.Minor} {statusCode} {statusDescription}";

Titanium.Web.Proxy/Http/Responses/OkResponse.cs

@@ -15,5 +15,13 @@ public OkResponse()
             StatusCode = (int)HttpStatusCode.OK;
             StatusDescription = "OK";
         }
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        public OkResponse(byte[] body) : this()
+        {
+            Body = body;
+        }
     }
 }