+++ title = "Reverse Proxy Recipe" description = "Using Echo as a reverse proxy server" [menu.main] name = "Reverse Proxy" parent = "cookbook" +++
This recipe demonstrates how you can use Echo as a reverse proxy server and load balancer in front of your favorite applications like WordPress, Node.js, Java, Python, Ruby or even Go. For simplicity, I will use Go upstream servers with WebSocket.
url1, err := url.Parse("http://localhost:8081")
if err != nil {
e.Logger.Fatal(err)
}
url2, err := url.Parse("http://localhost:8082")
if err != nil {
e.Logger.Fatal(err)
}
targets := []*middleware.ProxyTarget{
{
URL: url1,
},
{
URL: url2,
},
}
In the following code snippet we are using round-robin load balancing technique. You may also use middleware.NewRandomBalancer()
.
e.Use(middleware.Proxy(middleware.NewRoundRobinBalancer(targets)))
To setup proxy for a sub-route use Echo#Group()
.
g := e.Group("/blog")
g.Use(middleware.Proxy(...))
cd upstream
go run server.go server1 :8081
go run server.go server2 :8082
go run server.go
Step 4: Browse to http://localhost:1323
You should see a webpage with HTTP request being served from "server 1" and WebSocket request from "server 2".
HTTP
Hello from upstream server server1
WebSocket
Hello from upstream server server2!
Hello from upstream server server2!
Hello from upstream server server2!
upstream/server.go
{{< embed "reverse-proxy/upstream/server.go" >}}
server.go
{{< embed "reverse-proxy/server.go" >}}