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demo_gocraft.go
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/
demo_gocraft.go
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package main
import (
"fmt"
"github.com/gocraft/web"
"net/http"
"strings"
)
type User struct {
nickname string
login int
}
type Context struct {
HelloCount int
User *User
}
// Pretend like this is defined. It reads a session cookie and returns a *User or nil.
func userFromSession(r *web.Request) *User {
return &User{"kk", 20}
}
func (c *Context) UserRequired(rw web.ResponseWriter, r *web.Request, next web.NextMiddlewareFunc) {
user := userFromSession(r)
if user != nil {
c.User = user
next(rw, r)
} else {
rw.Header().Set("Location", "/")
rw.WriteHeader(http.StatusMovedPermanently)
// do NOT call next()
}
}
func (c *Context) SetHelloCount(rw web.ResponseWriter, req *web.Request, next web.NextMiddlewareFunc) {
c.HelloCount = 3
fmt.Println(c.HelloCount)
next(rw, req)
}
func (c *Context) SayHello(rw web.ResponseWriter, req *web.Request) {
fmt.Fprint(rw, strings.Repeat("Hello ", c.HelloCount), "World!")
}
func main() {
router := web.New(Context{}). // Create your router
Middleware(web.LoggerMiddleware). // Use some included middleware
Middleware(web.ShowErrorsMiddleware). // ...
Middleware((*Context).SetHelloCount). // Your own middleware!
Get("/", (*Context).SayHello) // Add a route
http.ListenAndServe("127.0.0.1:3000", router) // Start the server!
}