Golang RPC Simple Example

This is a creation in Article, where the information may have evolved or changed.

RPC (remote Procedure call Protocol)-a remoting protocol that requests services from a remote computer program over a network without needing to know the underlying network technology.

Its work flow is as follows:

Examples of Golang using RPC are as follows:

Server-side code:

This exposes an RPC interface, an HTTP interface

Package Main

Import (
"FMT"
"IO"
"NET"
"Net/http"
"Net/rpc"
)

Type Watcher int

Func (w *watcher) GetInfo (arg int, result *int) error {
*result = 1
return Nil
}

Func Main () {

http. Handlefunc ("/ghj1976", Ghj1976test)

Watcher: = new (Watcher)
Rpc. Register (Watcher)
Rpc. Handlehttp ()

L, Err: = Net. Listen ("TCP", ": 1234")
If err! = Nil {
Fmt. PRINTLN ("Listener failed, port may already be occupied")
}
Fmt. Println ("Listening on port 1234")
http. Serve (l, Nil)
}

Func ghj1976test (w http. Responsewriter, R *http. Request) {
Io. WriteString (W, "}

Client code:

Package Main

Import (
"FMT"
"Net/rpc"
)

Func Main () {
Client, err: = RPC. Dialhttp ("TCP", "127.0.0.1:1234")
If err! = Nil {
Fmt. Println ("Link RPC Server failed:", err)
}
var reply int
Err = client. Call ("Watcher.getinfo", 1, &reply)
If err! = Nil {
Fmt. PRINTLN ("Call remote service failed", err)
}
Fmt. PRINTLN ("Remote service Returns results:", reply)
}

Server-side code execution

Client code Execution

HTTP Web page Execution: