Call full initiator web use http client on Golang - http

Question

i write a api to repeat web backend on golang. when user call api from brower to golang, i will repeat http request to url that i want. but this path needs dependency paths, those dependency paths are not exactly redirected in the code. How can I catch those dependencies and put it in my code
Or is there any other implementation to solve this problem
enter image description here
MyCode
package main
import (
"fmt"
"io/ioutil"
"log"
"net"
"net/http"
"regexp"
"time"
)
func main() {
var sb string
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
timeout := time.Duration(5) * time.Second
transport := &http.Transport{
ResponseHeaderTimeout: timeout,
Dial: func(network, addr string) (net.Conn, error) {
return net.DialTimeout(network, addr, timeout)
},
DisableKeepAlives: true,
}
client := &http.Client{
Transport: transport,
}
resp, err := client.Get("http://localhost:8888")
if err != nil {
log.Fatalln(err)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatalln(err)
}
//Convert the body to type string
sb = string(body)
fmt.Fprint(w, sb)
// fmt.Printf(resp.Body)
//We Read the response body on the line below.
})
var re = regexp.MustCompile(`(?U)static/.+(\.ico|\.css|\.js)`)
for _, match := range re.FindAllString(sb, -1) {
http.HandleFunc("/"+match, func(w http.ResponseWriter, r *http.Request) {
fmt.Println("as")
timeout := time.Duration(5) * time.Second
transport := &http.Transport{
ResponseHeaderTimeout: timeout,
Dial: func(network, addr string) (net.Conn, error) {
return net.DialTimeout(network, addr, timeout)
},
DisableKeepAlives: true,
}
client := &http.Client{
Transport: transport,
}
resp, err := client.Get("http://localhost:8888/" + match)
if err != nil {
log.Fatalln(err)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatalln(err)
}
//
fmt.Println(body)
fmt.Fprint(w, body)
})
// fmt.Println(match, "found at index", i)
}
http.ListenAndServe(":82", nil)
}