英文:
http HandleFunc argument in golang
问题
我想使用一个速率限制或节流器库来限制客户端请求的数量。我在我的代码库中使用了一个供应商库。我想传入一个ResponseWriter、Request和从URL中检索到的第三个变量。当我使用节流器库进行节流时，它只返回一个处理程序，该处理程序只处理两个参数。我该如何将我的第三个参数传递给处理程序？
以下是我的当前代码：
package main
import (
"fmt"
"github.com/didip/tollbooth"
"net/http"
)
func viewHandler(
w http.ResponseWriter,
r *http.Request,
uniqueId string,
) {
//data := getData(uniqueId)
fmt.Println("Id:", uniqueId)
p := &objects.ModelApp{LoggedUser: "Ryan Hardy", ViewData: "data"}
renderTemplate(w, "view", p)
}
//URL validation for basic web services
var validPath = regexp.MustCompile("^/$|/(home|about|view)/(|[a-zA-Z0-9]+)$")
func makeHandler(
fn func(
http.ResponseWriter,
*http.Request, string,
)) http.HandlerFunc {
return func(
w http.ResponseWriter,
r *http.Request,
) {
m := validPath.FindStringSubmatch(r.URL.Path)
if m == nil {
http.NotFound(w, r)
return
}
fn(w, r, m[2])
}
}
func main() {
http.Handle("/view/", makeHandler(tollbooth.LimitFuncHandler(tollbooth.NewLimiter(1, time.Second), viewHandler)))
http.ListenAndServe(":8080", nil)
}
有人可以帮我解决这个问题吗？
英文:
I want to use a rate limiting or throttler library to limit the number of client requests. I use a vendor library in my code base. I want to pass in a ResponseWriter, Request and a third variable retrieved from the URL. When I use the library for throttling, it gives me back a handler that only handles two arguments. How can I pass my third argument into the handler?
Here is my current code:
package main
import (
"fmt"
"github.com/didip/tollbooth"
"net/http"
)
func viewHandler(
w http.ResponseWriter,
r *http.Request,
uniqueId string,
) {
//data := getData(uniqueId)
fmt.Println("Id:", uniqueId)
p := &objects.ModelApp{LoggedUser: "Ryan Hardy", ViewData: "data"}
renderTemplate(w, "view", p)
}
//URL validation for basic web services
var validPath = regexp.MustCompile("^/$|/(home|about|view)/(|[a-zA-Z0-9]+)$")
func makeHandler(
fn func(
http.ResponseWriter,
*http.Request, string,
)) http.HandlerFunc {
return func(
w http.ResponseWriter,
r *http.Request,
) {
m := validPath.FindStringSubmatch(r.URL.Path)
if m == nil {
http.NotFound(w, r)
return
}
fn(w, r, m[2])
}
}
func main() {
http.Handle("/view/", makeHandler(tollbooth.LimitFuncHandler(tollbooth.NewLimiter(1, time.Second), viewHandler)))
http.ListenAndServe(":8080", nil)
}
Could anyone help me with this?
答案1
得分: 1
我在手机上，所以可能很难输入，但你可以使用http.Handle函数，该函数接受一个Handler接口的参数，类似于以下代码：
type makeHandler struct {
YourVariable string
}
func (m *makeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
yourVariableYouNeed := m.YourVariable
// 做你需要的任何操作
w.Write()
}
// 做你需要的操作以获取你的变量
blah := &makeHandler{yourThing}
http.Handle("/views", blah)
我无法测试，因为我在手机上，但它应该可以工作。如果不能，请告诉我。
英文:
I'm on my phone so this may be difficult to type but you could use the http.Handle function which takes an interface of Handler something like
type makeHandler struct {
YourVariable string
}
func (m *makeHandler) ServeHTTP (w http.ResponseWriter, r *http.Request) {
yourVariableYouNeed := m.YourVariable
// do whatever
w.Write()
}
// do whatever you need to get your variable
blah := &makeHandler{ yourThing }
http.Handle("/views", blah)
On my phone so can't test but it should work, let me know if it doesn't.
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