Hi, I tried to send out a file via REST API with content type multipart/form-data

I have followed below guidance.

https://docs.pega.com/bundle/platform-23/page/platform/data-integration/file-attachment-configuration-rest-soap-integrations.html

After Connect rule is called, the log display below:

///

...

Request attachment page detected. Attemtping to construct multipart message.

Multipart request message has been constructed.

...

///

this prove the Connect rule has detected pyRequestAttachmentPage, and then the HTTP request content is displayed in log (but no any detail data there):

------------------HTTP REQUEST CONTENTS------------------POST /snow/api/now/attachment/upload HTTP/1.1 Request Headers: {Content-Type=multipart/form-data; boundary=kOAl24jNArECZE6o3Af0bO8I5JEsdljQXt-RZ} Request Message Data: 661 bytes to be sent

----------------END HTTP REQUEST CONTENTS----------------  

however later 

HTTP Status code: 400 Bad Request

------------------HTTP RESPONSE CONTENTS------------------

...

...

Response Message Data: 86 bytes received {"error":{"message":"Missing parameter: table_name","detail":null},"status":"failure"}

----------------END HTTP RESPONSE CONTENTS----------------  

server says Missing parameter: table_name

I have coded this param in activity for calling the Connect rule:

do you have idea what's the possible reason?

I guess the value list are not used at all so the request content in Log does not have any params in it.

Thanks.