使用http.Client和http.Transport设置请求标头
我有多个IP可以上网。我正在请求选择界面。在这种情况下,我应该如何设置标题?
tcpAddr := &net.TCPAddr{ IP: addrs[3].(*net.IPNet).IP, // Choosing ip address number 3
}
d := net.Dialer{LocalAddr: tcpAddr}
conn, err2 := d.Dial("tcp", "www.whatismyip.com:80")
if err2 != nil {
log.Fatal(err2)
}
defer conn.Close()
transport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
Dial: (&net.Dialer{LocalAddr: tcpAddr}).Dial,
TLSHandshakeTimeout: 10 * time.Second,
}
client := &http.Client{
Transport: transport,
}
response, err := client.Get("https://www.whatismyip.com/")
通常,头是以这种方式设置的:
req.Header.Set("name", "value")
但是无法弄清楚如何将它们设置为我的代码。
我想它们必须放在http.Transport
或中的某个位置http.Client
。但是到底如何呢?
我的完整代码:
package mainimport (
"bytes"
"fmt"
"github.com/PuerkitoBio/goquery"
"io/ioutil"
"log"
"net"
"net/http"
"os"
"time"
)
func main() {
ief, err := net.InterfaceByName("eth0")
if err != nil {
log.Fatal(err)
}
addrs, err := ief.Addrs()
if err != nil {
log.Fatal(err)
}
tcpAddr := &net.TCPAddr{
IP: addrs[3].(*net.IPNet).IP, // Choosing ip address number 3
}
d := net.Dialer{LocalAddr: tcpAddr}
conn, err2 := d.Dial("tcp", "www.whatismyip.com:80")
if err2 != nil {
log.Fatal(err2)
}
defer conn.Close()
transport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
Dial: (&net.Dialer{LocalAddr: tcpAddr}).Dial,
TLSHandshakeTimeout: 10 * time.Second,
}
client := &http.Client{
Transport: transport,
}
response, err := client.Get("https://www.whatismyip.com/")
if err != nil {
fmt.Printf("%s", err)
os.Exit(1)
} else {
defer response.Body.Close()
contents, err := ioutil.ReadAll(response.Body)
if err != nil {
fmt.Printf("%s", err)
os.Exit(1)
}
var contentsStr = string(contents)
fmt.Printf("%s\n", contentsStr)
var doc = DocByHtmlString(contentsStr)
doc.Find("div").Each(func(i int, s *goquery.Selection) {
attr, exists := s.Attr("class")
if exists {
if attr == "ip" {
fmt.Println(s.Text())
}
}
})
}
}
func DocByHtmlString(html string) *goquery.Document {
doc, err := goquery.NewDocumentFromReader(bytes.NewBufferString(html))
if err != nil {
panic(err)
}
return doc
}
回答:
创建一个请求:
req, err := http.NewRequest("GET", "https://www.whatismyip.com/", nil) if err != nil {
// handle error
}
设置标题:
req.Header.Set("name", "value")
使用client
问题中配置的方式运行请求:
resp, err := client.Do(req) if err != nil {
// handle error
}
按照问题所示处理响应。
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