Restrict put on a gun server
This module will listen to in and run your supplied validation function against all put messages.
Install bullet-catcher from npm
$ npm i bullet-catcherRequire bullet-catcher in your gun server
const Gun = require('gun')
// MUST be required after Gun to work
require('bullet-catcher')
// This is an example validation function
function hasValidToken (msg) {
return msg && msg && msg.headers && msg.headers.token && msg.headers.token === 'thisIsTheTokenForReals'
}
const server = require('http').createServer((req, res) => {
// filters gun requests!
if (Gun.serve(req, res)) {
return
}
require('fs').createReadStream(require('path').join(__dirname, req.url)).on('error', function () {
res.writeHead(200, {'Content-Type': 'text/html'})
res.end(require('fs')
.readFileSync(require('path')
.join(__dirname, 'index.html')
))
}).pipe(res)
})
// Pass the validation function as isValid
const gun = Gun({
file: 'data.json',
web: server,
isValid: hasValidToken
})
// Sync everything
gun.on('out', {get: {'#': {'*': ''}}})
server.listen(8000)On your client add a listener for outgoing messages and enrich them with whatever you want to validate for
Gun.on('opt', function (ctx) {
if (ctx.once) {
return
}
ctx.on('out', function (msg) {
var to = this.to
// Adds headers for put
msg.headers = {
token: 'thisIsTheTokenForReals'
}
to.next(msg) // pass to next middleware
})
})