sails-hook-maintenance-mode
Sails JS hook to provide a simple "maintenance mode" for an app, toggleable with an environment variable. In maintenance mode, all requests receive an "under maintenance" page or message in response.
Installation
npm install sails-hook-maintenance-mode
Usage
To lift an app in maintenance mode, set the MAINTENANCE_MODE environment variable to "true".
MAINTENANCE_MODE=true sails liftConfiguration
By default, configuration lives in sails.config['maintenance-mode']. The configuration key (maintenance-mode) can be changed by setting sails.config.hooks['sails-hook-maintenance-mode'].configKey.
| Parameter | Type | Default | Details |
|---|---|---|---|
| envVar | ((string)) | MAINTENANCE_MODE |
Environment variable to check |
| view | ((string)) | none | View to display in maintenance mode. If not provided, the hook will use the views/maintenance.ejs view if your app has one. Otherwise, it will show a default maintenance page. Set to false to display text or JSON instead of a view (see text_message and json_message options) |
| viewLocals | ((dictionary)) | {} |
Locals and options to use with your maintenance view. You can use this to change up the message per environment, or to provide a different layout. |
| whitelistUrls | ((array)) | none | Array of strings or regular expressions to match a requested URL against. If the URL matches anything in the whitelist, it will bypass maintenance mode and be allowed to proceed. Useful for keeping certain sections of a site (like a contact page or FAQ) live. |
| status | ((number)) | 503 (service unavailable) | Status code to respond with in maintenance mode. |
| jsonMessage | ((json)) | none | If view is set to false and json_message is provided, the res.json method will be used with that value for the response in maintenance mode. |
| textMessage | ((string)) | none | If view is set to false and text_message is provided (and json_message is not provided), the res.send method will be used with that value for the response in maintenance mode. |
| backdoorOnParam | ((string)) | none | Parameter which can be used to unlock maintenance mode for a single session. Use this to test updates to the site while the rest of the world still sees the maintenance page. |
| backdoorOffParam | ((string)) | none | Parameter which can be used to re-instate maintenance mode for a session after the backdoor_on_param has been used. |
Example
// [your-sails-app]/config/env/production.js
module.exports = {
'maintenance-mode': {
envVar: 'MAINTENANCE',
view: false,
textMessage: "Site currently under maintenance, please try again later."
backdoorOnParam: 'open_sesame',
backdoorOffParam: 'close_sesame',
status: 200
}
};