Go Web
Go Web is a framework for micro service web development.
Overview
Go Web provides a tiny HTTP web server library which leverages go-micro to create
micro web services as first class citizens in a microservice world. It wraps go-micro to give you service discovery,
heartbeating and the ability to create web apps as microservices.
Features
-
Service Discovery - Services are automatically registered in service discovery on startup. Go Web includes
a http.Client with pre-initialised roundtripper which makes use of service discovery so you can use service names.
-
Heartbeating - Go Web apps will periodically heartbeat with service discovery to provide liveness updates.
In the event a service fails it will be removed from the registry after a pre-defined expiry time.
-
Custom Handlers - Specify your own http router for handling requests. This allows you to maintain full
control over how you want to route to internal handlers.
Getting Started
Dependencies
Go Web makes use of Go Micro which means it needs service discovery
See the go-micro for install instructions
For a quick start use consul
# install
brew install consul
# run
consul agent -dev
Usage
service := web.NewService(
web.Name("example.com"),
)
service.HandleFunc("/foo", fooHandler)
if err := service.Init(); err != nil {
log.Fatal(err)
}
if err := service.Run(); err != nil {
log.Fatal(err)
}
Set Handler
You might have a preference for a HTTP handler, so use something else. This loses the ability to register endpoints in discovery
but we'll fix that soon.
import "github.com/gorilla/mux"
r := mux.NewRouter()
r.HandleFunc("/", indexHandler)
r.HandleFunc("/objects/{object}", objectHandler)
service := web.NewService(
web.Handler(r)
)
Call Service
Go-web includes a http.Client with a custom http.RoundTripper that uses service discovery
c := service.Client()
rsp, err := c.Get("http://example.com/foo")
This will lookup service discovery for the service example.com
and route to one of the available nodes.