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Fault tolerant and reactive HTTP client for node.js and browsers
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options.http = {
timeout: 15 * 1000,
cache: false
}
Exposed as config options and transported by header to discovery servers
updateServer(function (err) {
if (err) cb(new ResilientError(err))
})
Required properties:
As possible feature a a future 0.2.0
version
Allow more configurable options for the balancer algorithm
Resilient({
balancer: {
policy: 'latency' // 'errors'
}
})
resilient.updateServer(cb)
Aditional option:
algorithm: 'roundrobin',
size: 3
Configured by weight in percentage
{
latency: 30,
request: 30,
error: 40
}
It could use superagent or request
Add options to support parallel requests
parallel: true
resilient.balancer({
weight: {
request: 30,
error: 50,
latency: 20
}
})
It should support take read it from Server()
resilient().setDiscoveryServers([ ... ])
{
latency: 30,
success: 30,
error: 40
}
Add retry support for fallbacks:
retry: 3, // default to 0
retryDefer: 1000
Just some wishful thinking for future version.
Useful to create coupling between clients as nested nodes which depends of the state of its parent
var client1 = Resilient({
discovery: { servers: ['http://server.me'] }
})
var client2 = Resilient({
parent: client1
})
Client 2 should not perform a request until the client 1 is available, for example, cannot update servers until Client1 has an up-to-date servers list
It could be also useful to dynamically update discovery servers from it's parent
Use lil-events
Support servers discovering and processing jobs in a non-blocking thread
Like $http
Use cucumber.js browser runner and handle tests status via mocha
Just a reminder!
[
{
url: 'http://1.server.com',
timeout: 3000,
priority: 1,
allowMethods: ['GET'],
weight: {
latency: 50,
response: 35,
error: 15
}
}
]
Support a custom XHR client, useful to integrate with Angular and others frameworks
function wrapHttp(options, cb) {
$http(options)
.then(function (res) { cb(null, res) }, function (err) { cb(err) })
}
resilient.setHttpClient(wrapHttp)
Inspired in Angular
Ping
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