CustomHeaders
Custom HTTP headers returned by every request comma separated list in format "Name":"Value", "Name":"Value"....

Default value:
"Access-Control-Max-Age", "1000", "Access-Control-Allow-Origin": "*", "Access-Control-Allow-Methods": "DELETE,PUT,GET,POST,OPTIONS", "Access-Control-Allow-Headers": "Access-Control-Allow-Origin,Origin,Content-Type,Accept,Authorization,AccessToken,DpeToken,Range,x-csrftoken","Access-Control-Expose-Headers": "Content-Range,Location"

This string returned followed HTTP headers by every request:

"Access-Control-Max-Age": "1000"
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "DELETE,PUT,GET,POST,OPTIONS",
"Access-Control-Allow-Headers": "Access-Control-Allow-Origin,Origin,Content-Type,Accept,Authorization,AccessToken,DpeToken,Range,x-csrftoken",
"Access-Control-Expose-Headers": "Content-Range,Location"
Possible values: [see description]
Default value: [see description]