Add REST API endpoint for generating space exports in HTML format

Currently we have  REST API functionality for creating space exports only by using XML format. We need to have Rest API to create space/site exports by using HTML format.

Workaround

1. The Confluence CLI provides such functionality, but it is a paid third-party add-on. The above functionality would be important to automate migration/backup tasks for administrators.
2. Although deprecated, you may still use the RPC-API to export the entire Space - see the examples below.
   • Confluence JSON-RPC APIs
   • Remote Confluence methods
   • Remote API Specification for PDF export

Export a Space to HTML.

USRNAME=admin
USRPWD=password
CONFBASEURL=http://127.0.0.1:8090/confluence
SPACE_KEY=SPACEKEY

curl -s \
    --user $USRNAME:$USRPWD \
    -H "Content-Type: application/json" \
    -H "Accept: application/json" \
    -X POST \
    -d '{ "jsonrpc" : "2.0", "method" : "exportSpace", "params" : ["'${SPACE_KEY}'", "TYPE_HTML", "true"], "id": 7 }' \
    ${CONFBASEURL}'/rpc/json-rpc/confluenceservice-v2?os_authType=basic'

Space import

For possible workarounds on importing spaces, please also check this KB article: Confluence Space Import Via Scripting Tools