The boundary used to separate multiple parts of the message. Only valid when contentType is multipart/form-data.
contentType
multipart/form-data
The content-type header used for the data. One of application/x-www-form-urlencoded or multipart/form-data. Corresponds to the enctype attribute of the submitted HTML form.
content-type
application/x-www-form-urlencoded
enctype
The post data to be sent to the new window.