added support for data in POST request

library/client/http_client/src/http_client_request_context.e

@@ -38,6 +38,10 @@ feature -- Access
 
 	form_data_parameters: HASH_TABLE [READABLE_STRING_32, READABLE_STRING_8]
 
+	upload_data: detachable READABLE_STRING_8
+
+	upload_filename: detachable READABLE_STRING_8
+
 feature -- Status report
 
 	has_form_data: BOOLEAN
@@ -45,6 +49,16 @@ feature -- Status report
 			Result := not form_data_parameters.is_empty
 		end
 
+	has_upload_data: BOOLEAN
+		do
+			Result := attached upload_data as d and then not d.is_empty
+		end
+
+	has_upload_filename: BOOLEAN
+		do
+			Result := attached upload_filename as fn and then not fn.is_empty
+		end
+
 feature -- Element change
 
 	add_query_parameter (k: READABLE_STRING_8; v: READABLE_STRING_32)
@@ -62,4 +76,18 @@ feature -- Element change
 			credentials_required := b
 		end
 
+	set_upload_data (a_data: like upload_data)
+		require
+			has_no_upload_data: not has_upload_data
+		do
+			upload_data := a_data
+		end
+
+	set_upload_filename (a_fn: like upload_filename)
+		require
+			has_no_upload_filename: not has_upload_filename
+		do
+			upload_filename := a_fn
+		end
+
 end