英文:
How to add headers info using Transport in golang net/http
问题
我正在尝试通过创建一个Transport来控制保持活动会话，以便重用TCP连接。
这是我的代码片段，我不确定如何添加身份验证的头信息。
url := "http://localhost:8181/api/v1/resource"
tr := &http.Transport{
DisableKeepAlives: false,
MaxIdleConns: 0,
MaxIdleConnsPerHost: 0,
IdleConnTimeout: time.Second * 10,
}
client := &http.Client{Transport: tr}
resp, err := client.Get(url)
请注意，这只是一个示例代码片段，你需要根据你的身份验证方式和需求来添加适当的头信息。
英文:
I am trying to control keep-alives session to reuse the tcp connection by creating a Trasport.
Here is my snippet and I am not sure how to add headers info for authentication.
url := "http://localhost:8181/api/v1/resource"
tr := &http.Transport{
DisableKeepAlives: false,
MaxIdleConns: 0,
MaxIdleConnsPerHost: 0,
IdleConnTimeout: time.Second * 10,
}
client := &http.Client{Transport: tr}
resp, err := client.Get(url)
答案1
得分: 8
这可能不是你对于你具体问题的期望结果——在你的情况下，在请求中设置更有意义，但是直接回答你的问题，你可以通过为你的传输层添加一个自定义的RoundTrip方法来为所有请求添加默认的头部。
参考：https://golang.org/pkg/net/http/#RoundTripper
类似于：
type CustomTransport struct {
http.RoundTripper
}
func (ct *CustomTransport) RoundTrip(req *http.Request) (*http.Response, error) {
req.Header.Add("header-key", "header-value")
return ct.RoundTripper.RoundTrip(req)
}
url := "http://localhost:8181/api/v1/resource"
tr := &CustomTransport{
DisableKeepAlives: false,
MaxIdleConns: 0,
MaxIdleConnsPerHost: 0,
IdleConnTimeout: time.Second * 10,
}
client := &http.Client{Transport: tr}
resp, err := client.Get(url)
当我无法直接访问API客户端库中使用的http客户端（或每个请求对象）时，我发现这个方法很有用，但它允许我传入一个传输层。
英文:
This may not be what you want for your specific question - setting it in the request makes more sense in your case, but to answer your question directly, you should be able to add a default header to all the requests going through the transport by using a custom RoundTrip method for your Transport.
Check out https://golang.org/pkg/net/http/#RoundTripper
Something like :
type CustomTransport struct {
http.RoundTripper
}
func (ct *CustomTransport) RoundTrip(req *http.Request) (*http.Response, error) {
req.Header.Add("header-key", "header-value")
return ct.RoundTripper.RoundTrip(req)
}
url := "http://localhost:8181/api/v1/resource"
tr := &CustomTransport{
DisableKeepAlives: false,
MaxIdleConns: 0,
MaxIdleConnsPerHost: 0,
IdleConnTimeout: time.Second * 10,
}
client := &http.Client{Transport: tr}
resp, err := client.Get(url)
I found this useful when I didn't have direct access to the http Client used by an API client library (or each request object directly), but it allowed me to pass in a transport.
答案2
得分: 3
不要混淆请求中的Client。
客户端使用Transport并运行请求：client.Do(req)
您可以使用http.Request上的(h Header) Set(key, value string)设置标头：
req.Header.Set("name", "value")
英文:
Don't mix the Client from the Request.
The client uses a Transport and run the request: client.Do(req)
You set header on the http.Request with (h Header) Set(key, value string):
req.Header.Set("name", "value")
答案3
得分: 0
这是我找到的代码：
package main
import (
"fmt"
"io/ioutil"
"net/http"
)
var URL = "http://httpbin.org/ip"
func main() {
tr := &http.Transport{DisableKeepAlives: false}
req, _ := http.NewRequest("GET", URL, nil)
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", "Token"))
req.Close = false
res, err := tr.RoundTrip(req)
if err != nil {
fmt.Println(err)
}
body, _ := ioutil.ReadAll(res.Body)
fmt.Println(string(body))
}
它可以正常工作。
英文:
This is what I found:
package main
import (
"fmt"
"io/ioutil"
"net/http"
)
var URL = "http://httpbin.org/ip"
func main() {
tr := &http.Transport{DisableKeepAlives: false}
req, _ := http.NewRequest("GET", URL, nil)
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", "Token"))
req.Close = false
res, err := tr.RoundTrip(req)
if err != nil {
fmt.Println(err)
}
body, _ := ioutil.ReadAll(res.Body)
fmt.Println(string(body))
}
And it works.
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