我正在從我的客戶端發送“用戶代理標頭”，但沒有在服務器端接收，但是當我使用瀏覽器時它可以作業。
服務器代碼：
package main
import (
"crypto/tls"
"fmt"
"log"
"net/http"
"time"
)
const (
defaultServerDomain = "localhost:443"
certPemPath = "./selfsigned.crt"
privKeyPath = "./selfsigned.key"
)
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/demo/echo", func(w http.ResponseWriter, req *http.Request) {
w.Header().Add("Strict-Transport-Security", "max-age=63072000; includeSubDomains")
w.Write([]byte("This is an example server.\n"))
fmt.Printf("\n\nUserAgent : %s", req.UserAgent())
})
cfg := &tls.Config{
MinVersion: tls.VersionTLS12,
CurvePreferences: []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256},
PreferServerCipherSuites: true,
CipherSuites: []uint16{
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
},
}
srv := &http.Server{
ReadHeaderTimeout: 2 * time.Second,
Addr: defaultServerDomain,
Handler: mux,
TLSConfig: cfg,
TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0),
}
log.Fatal(srv.ListenAndServeTLS(certPemPath, privKeyPath))
}
客戶端代碼：
package main
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io"
"log"
"net/http"
"os"
"time"
)
const (
serverDomain = "https://localhost:443/demo/echo"
certPemPath = "./selfsigned.crt"
)
func main() {
cert, err := os.ReadFile(certPemPath)
if err != nil {
log.Fatal(err)
}
certPool := x509.NewCertPool()
if ok := certPool.AppendCertsFromPEM(cert); !ok {
log.Fatalf("unable to parse cert from %s", certPemPath)
}
client := &http.Client{
Timeout: 2 * time.Second,
Transport: &http.Transport{
DisableKeepAlives: false,
TLSClientConfig: &tls.Config{
RootCAs: certPool,
},
},
}
r, err := http.NewRequest("GET", serverDomain, nil)
req, err := client.Do(r)
if err != nil {
log.Fatal(err)
}
req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.7113.93 Safari/537.36")
defer req.Body.Close()
html, err := io.ReadAll(req.Body)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%v\n", req.Status)
fmt.Printf(string(html))
}
假設獲取服務器端：
用戶代理：Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0 Waterfox/91.4.2
相反，我得到了這個：
用戶代理：Go-http-client/1.1
但是當我在我的情況下使用瀏覽器 waterfox 時它可以作業我得到
用戶代理：Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0 Waterfox/91.4.2
是否與我使用自簽名證書的代碼或證書有關
uj5u.com熱心網友回復：
我相信這個問題很可能在這里：
r, err := http.NewRequest("GET", serverDomain, nil)
req, err := client.Do(r)
的定義NewRequest是func NewRequest(method, url string, body io.Reader) (*Request, error)和。所以上面的代碼可能更容易理解為：Client.Do func (c *Client) Do(req *Request) (*Response, error)
req, err := http.NewRequest("GET", serverDomain, nil)
resp, err := client.Do(req) // This returns a response; not the request
當您呼叫Do請求時（因此必須在該點之前設定標頭）。當您設定要呼叫的標頭時，對代碼進行上述改寫resp.Header.Set...（即您正在更改請求回傳的標頭；而不是請求標頭）。
Do在呼叫ie之前更改代碼以設定標題
req, err := http.NewRequest("GET", serverDomain, nil)
req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.7113.93 Safari/537.36")
resp, err := client.Do(req)
注意：我沒有完整測驗你的代碼，所以可能還有其他問題
轉載請註明出處，本文鏈接：https://www.uj5u.com/shujuku/490861.html