fix eSign example 7

Author: RomanBachaloSigmaSoftware

app/eSignature/examples/eg007_envelope_get_doc.py

@@ -41,7 +41,7 @@ def worker(args):
         document_id = args["document_id"]
 
         # Call the envelope get method to get the path of the temp file with the documents
-        (temp_file_path, status, headers) = envelope_api.get_document_with_http_info(
+        (document_bytes, status, headers) = envelope_api.get_document_with_http_info(
             account_id=args["account_id"],
             document_id=document_id,
             envelope_id=args["envelope_id"]
@@ -76,4 +76,4 @@ def worker(args):
         else:
             mimetype = "application/octet-stream"
 
-        return {"mimetype": mimetype, "doc_name": doc_name, "data": temp_file_path}
+        return {"mimetype": mimetype, "doc_name": doc_name, "data": document_bytes}

app/eSignature/views/eg007_envelope_get_doc.py

@@ -1,5 +1,6 @@
 """007: Get an envelope"s document"""
 
+from io import BytesIO
 from os import path
 
 from docusign_esign.client.api_exception import ApiException
@@ -39,10 +40,10 @@ def get_envelope_doc():
 
         # 3. Download envelope document from the temp file path
         return send_file(
-            results["data"],
+            BytesIO(results["data"]),
             mimetype=results["mimetype"],
             as_attachment=True,
-            attachment_filename=results["doc_name"]
+            download_name=results["doc_name"]
         )
     else:
         return render_template(