英文:
How to call a route by its name from inside a handler?
问题
如何在处理程序内正确引用路由名称？
mux.NewRouter() 应该全局分配，而不是在函数内部定义。
func AnotherHandler(writer http.ResponseWriter, req *http.Request) {
url, _ := r.Get("home") // 我假设这里的 'r' 是指路由器
http.Redirect(writer, req, url, 302)
}
func main() {
r := mux.NewRouter()
r.HandleFunc("/", HomeHandler).Name("home")
r.HandleFunc("/nothome/", AnotherHandler).Name("another")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}
英文:
How do I properly refer to route names from inside handlers?
Should mux.NewRouter() be assigned globally instead of standing inside a function?
func AnotherHandler(writer http.ResponseWriter, req *http.Request) {
url, _ := r.Get("home") // I suppose this 'r' should refer to the router
http.Redirect(writer, req, url, 302)
}
func main() {
r := mux.NewRouter()
r.HandleFunc("/", HomeHandler).Name("home")
r.HandleFunc("/nothome/", AnotherHandler).Name("another")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}
答案1
得分: 8
你有一个名为mux.CurrentRoute()的方法，它返回给定请求的路由。通过该请求，你可以创建一个子路由并调用Get("home")。
示例：（play: http://play.golang.org/p/Lz10YUyP6e）
package main
import (
"fmt"
"net/http"
"github.com/gorilla/mux"
)
func HomeHandler(writer http.ResponseWriter, req *http.Request) {
writer.WriteHeader(200)
fmt.Fprintf(writer, "Home!!!\n")
}
func AnotherHandler(writer http.ResponseWriter, req *http.Request) {
url, err := mux.CurrentRoute(req).Subrouter().Get("home").URL()
if err != nil {
panic(err)
}
http.Redirect(writer, req, url.String(), 302)
}
func main() {
r := mux.NewRouter()
r.HandleFunc("/home", HomeHandler).Name("home")
r.HandleFunc("/nothome/", AnotherHandler).Name("another")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}
英文:
You have the method mux.CurrentRoute() that returns the route for a given request. From that request, you can create a subrouter and call Get("home")
Example: (play: http://play.golang.org/p/Lz10YUyP6e)
package main
import (
"fmt"
"net/http"
"github.com/gorilla/mux"
)
func HomeHandler(writer http.ResponseWriter, req *http.Request) {
writer.WriteHeader(200)
fmt.Fprintf(writer, "Home!!!\n")
}
func AnotherHandler(writer http.ResponseWriter, req *http.Request) {
url, err := mux.CurrentRoute(req).Subrouter().Get("home").URL()
if err != nil {
panic(err)
}
http.Redirect(writer, req, url.String(), 302)
}
func main() {
r := mux.NewRouter()
r.HandleFunc("/home", HomeHandler).Name("home")
r.HandleFunc("/nothome/", AnotherHandler).Name("another")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}
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