[Dashboard] Export dashboard as a ZIP

[lasanthaS]

Description:
In the current implementation, the dashboard can be exported via the following cURL command.

curl 
    -u <USERNAME>:<PASSWORD> 
    -o '<DASHBOARD_ID>.json' 
    -k 
    'https://localhost:9643/portal/apis/dashboards/<DASHBOARD_ID>/export'

This dumps the dashboard as a JSON file which contains,

• Dashboard definition
• Generated widget definitions
• Custom widget names

This needs to be improved in order to download the dashboard as a ZIP file which contains,

• Above dashboard JSON file
• All the custom widgets

Affected Product Version:
WSO2SP 4.3.0

[lasanthaS]

Since this feature needs to support both the scenario, i.e. download as a JSON and download as a ZIP file, Accept HTTP header can be used to distinguish the type.

Download as JSON (default for backward compatibility)

curl 
    -u <USERNAME>:<PASSWORD> 
    -o '<DASHBOARD_ID>.json' 
    -H 'Accept: application/json'
    -k 
    'https://localhost:9643/portal/apis/dashboards/<DASHBOARD_ID>/export'

Download as ZIP

curl 
    -u <USERNAME>:<PASSWORD> 
    -o '<DASHBOARD_ID>.json' 
    -H 'Accept: application/zip'
    -k 
    'https://localhost:9643/portal/apis/dashboards/<DASHBOARD_ID>/export'