Derby server-query plugin
npm install server-queryDerby/racer server-query plugin. It allows only server-defined queries and denies arbitrary client queries.
With npm do:
``
npm install server-query
On client:
`js`
require('server-query')
On the server:
`js
require('server-query')(backend)
// or if you wish to use usual queries you should pass true as the second param
require('server-query')(backend, true)
// Add server queries
// function addServerQuery accept
// 'collection' - collection name
// 'queryName' - name of query
// 'cb' - function that accepts 'params' and 'session'
// and returns a query-object or error-string
backend.addServerQuery('items', 'main', async function(params, request, agent){
return {type: 'public'}
})
backend.addServerQuery('items', 'myItems', async function(params, request, agent){
return {ownerId: session.userId}
})
backend.addServerQuery('items', 'byType', async function(params, request, agent){
// ++++++++++++++++++++++++++++
// Should check params here!!!!
// it's a security issue
// ++++++++++++++++++++++++++++
return {type: params.type}
})
`
In order to bypass all checks for queries on some collections, just
add those collection to the whitelist. This means that you will be able to use
the usual model.query() on those collections - both server-side and client-side.
If you want to fine-grained access control to collections, please have a look
at share-access module.
Using queries:
`js
// function serverQuery accepts 3 arguments:
// 'collection' - collection name (should match one from addServerQuery)
// 'queryName' - name of query (should match one from addServerQuery)
// 'params' - object with query-params
var query = model.serverQuery('items', 'byType', {
type: 'global'
})
model.subscribe(query, function(){
page.render('home')
})
`
What is still allowed:
`js
// You still can use path-query
var query = model.server('items', '_page.itemIds')
model.subscribe(query, function(){
//...
})
// one-item fetch/subscriptions also aren't dennied
var itemId = params.itemId
var item = model.at('items.'+itemId)
model.subscribe(item, function(){
//...
})
// Or just
model.subscribe('items.' + itemId, function(){
//...
})
// But
model.subscribe('items', function(err){
// Will get Error here!!!!!
})
``
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