英文:
Go HTTP Client not returning cookies
问题
我正在使用Go的HTTP客户端进行GET请求，该客户端已经初始化了一个cookiejar，但是响应的cookie数组为空。有人知道我做错了什么吗？
jar, err := cookiejar.New(nil)if err != nil {log.Fatal(err)}s.http_client = &http.Client{Jar: jar}resp, _ := s.http_client.Get(s.url)fmt.Println(resp.Cookies())
fmt.Println(resp.Cookies()) 返回一个空数组，尽管我可以在Firefox中看到返回的cookie。
英文:
I am using go http client to make get requests and the client has been initialised with a cookiejar however the response cookie array is empty. Has anyone got any idea what I am doing wrong?
jar, err := cookiejar.New(nil)if err != nil {log.Fatal(err)}s.http_client = &http.Client{Jar: jar}resp, _ := s.http_client.Get(s.url)
fmt.Println(resp.Cookies()) returns an empty array although I can see cookies returned in firefox.
答案1
得分: 5
你可以创建一个cookiejar，并且可以像在“如何使用cookie跟随重定向”中所示那样使用它：
jar, err := cookiejar.New(&options)if err != nil {log.Fatal(err)}client := http.Client{Jar: jar} // <============resp, err := client.Get("http://dubbelboer.com/302cookie.php")if err != nil {log.Fatal(err)}data, err := ioutil.ReadAll(resp.Body)resp.Body.Close()
（在Go1.1中引入，就像这个答案中所述）
一个http.Client结构体有：
// Jar specifies the cookie jar.// If Jar is nil, cookies are not sent in requests and ignored// in responses.Jar CookieJar
如3of3所提到的，你不需要一个cookiejar来**获取cookie**：
for _, cookie := range r.Cookies() {fmt.Fprint(w, cookie.Name)}
在读取完整个响应体之后，检查cookiejar是否仍然为空。
英文:
You create a cookiejar, and you can use it as seen in "how to follow location with cookie":
jar, err := cookiejar.New(&options)if err != nil {log.Fatal(err)}client := http.Client{Jar: jar} // <============resp, err := client.Get("http://dubbelboer.com/302cookie.php")if err != nil {log.Fatal(err)}data, err := ioutil.ReadAll(resp.Body)resp.Body.Close()
(introduced with Go1.1 as in this answer)
An http.Client struct has:
// Jar specifies the cookie jar.// If Jar is nil, cookies are not sent in requests and ignored// in responses.Jar CookieJar
As 3of3 mentions, you don't need a cookiejar to fetch a cookie:
for _, cookie := range r.Cookies() {fmt.Fprint(w, cookie.Name)}
Check if the cookiejar is still empty after having read the full response body.
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