如何在golang中使用regexp获取url模式? [英] How to use regexp get url pattern in golang?
问题描述
如何使用正则表达式匹配的URL,它决定使用相应的函数处理
package main
导入(
fmt
net / http
)
func main(){
http.HandleFunc(/模式,解决)
http.ListenAndServe(:8080,零)
}
func resolve(w http.ResponseWriter,r * http.Request){
fmt.Println(r.URL.Host)
}
http.HandleFunc()
不能用于注册一个模式以匹配正则表达式。简而言之,在 HandleFunc()
中指定的模式可以匹配固定的根路径(如 /favico.ico
)或根源子树(如 / images /
),较长的模式优先于较短的模式。您可以在 ServeMux $ c $文档中找到更多详细信息c>
类型。
您可以将您的处理程序注册到一个有根的子树,该树可以是 / code>模式,并且在你的处理程序中,你可以做更多的正则表达式匹配和路由。
例如:
func main(){
http.HandleFunc(/,route)//匹配所有
http.ListenAndServe(:8080,nil)
$ b $ var rNum = regexp.MustCompile(`\ d`)//有数字
var rAbc = regexp.MustCompile(`abc`)//包含abc
func route(w http.ResponseWriter,r * http.Request){
switch {
case rNum.MatchString(r.URL.Path):
数字(w,r)
案例rAbc.MatchString(r.URL.Path):
abc(w,r)
默认值:
w.Write([ ]字节(未知模式))
}
}
func数字(w http.Respo ($ http:// http:// http:// http:// www。 http.Request){
w.Write([] byte(has abc))
}
或者使用像Gorilla MUX这样的外部库。
How to use regular expression matching URL, which does decide to use the corresponding function processing
package main
import(
"fmt"
"net/http"
)
func main() {
http.HandleFunc("/pattern", resolve)
http.ListenAndServe(":8080", nil)
}
func resolve(w http.ResponseWriter, r * http.Request) {
fmt.Println(r.URL.Host)
}
http.HandleFunc()
can not be used to register a pattern to match a regular expression. In short, the pattern specified at HandleFunc()
can match a fixed, rooted path (like /favico.ico
) or rooted subtrees (like /images/
), longer patterns take precedence over shorter ones. You can find more details at the doc of the ServeMux
type.
What you can do is register your handler to a rooted subtree which may be everything with the /
pattern, and inside your handler you can do further regexp matching and routing.
For example:
func main() {
http.HandleFunc("/", route) // Match everything
http.ListenAndServe(":8080", nil)
}
var rNum = regexp.MustCompile(`\d`) // Has digit(s)
var rAbc = regexp.MustCompile(`abc`) // Contains "abc"
func route(w http.ResponseWriter, r *http.Request) {
switch {
case rNum.MatchString(r.URL.Path):
digits(w, r)
case rAbc.MatchString(r.URL.Path):
abc(w, r)
default:
w.Write([]byte("Unknown Pattern"))
}
}
func digits(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Has digits"))
}
func abc(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Has abc"))
}
Or use an external library like Gorilla MUX.
这篇关于如何在golang中使用regexp获取url模式?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!