我正在编写一个需要登录网站以获取一些数据的 go 程序。登录过程已完成，但现在我遇到的问题是我无法使用从登录表单获得的 cookie 访问 protected 页面。在检查它们并与我的浏览器获得的那些进行比较后，我注意到我的程序获得带有“空”时间戳的 cookie。有人可以指出，我如何获得具有正确时间戳的 cookie？那太棒了。

这是我的代码:

package main

import (
    "fmt"
    "html"
    "io/ioutil"
    "log"
    "net/http"
    "net/http/cookiejar"
    "net/url"
    "regexp"
    "strings"
    "time"
)

var CookieJar *cookiejar.Jar
var httpClient *http.Client

func dbgPrintCurCookies(CurCookies []*http.Cookie) {
    var cookieNum int = len(CurCookies)
    log.Printf("cookieNum=%d", cookieNum)
    for i := 0; i < cookieNum; i++ {
        var curCk *http.Cookie = CurCookies[i]
        //log.Printf("curCk.Raw=%s", curCk.Raw)
        log.Printf("Cookie [%d]", i)
        log.Printf("Name\t=%s", curCk.Name)
        log.Printf("Value\t=%s", curCk.Value)
        log.Printf("Path\t=%s", curCk.Path)
        log.Printf("Domain\t=%s", curCk.Domain)
        log.Printf("Expires\t=%s", curCk.Expires)
        log.Printf("RawExpires=%s", curCk.RawExpires)
        log.Printf("MaxAge\t=%d", curCk.MaxAge)
        log.Printf("Secure\t=%t", curCk.Secure)
        log.Printf("HttpOnly=%t", curCk.HttpOnly)
        log.Printf("Raw\t=%s", curCk.Raw)
        log.Printf("Unparsed=%s", curCk.Unparsed)
    }
}

func main() {
    CookieJar, _ = cookiejar.New(nil)

    httpClient := &http.Client{
        Jar:     CookieJar,
        Timeout: 10 * time.Second,
        CheckRedirect: func(req *http.Request, via []*http.Request) error {
            return http.ErrUseLastResponse
        }}

    LSFRedirURL := ""
    pw := "
    us := ""
    LoginURL := "login website ?j_password=" + pw + "&j_username=" + us
    GetFinalCookieURL := ""



    //get first cookie
    nextURL := LSFRedirURL
    for i := 0; i < 10; i++ {
        resp, _ := httpClient.Get(nextURL)
        // fmt.Println("StatusCode:", resp.StatusCode)
        // fmt.Println(resp.Request.URL)
        if resp.StatusCode == 200 {
            // fmt.Println("Done!")
            break
        } else {
            nextURL = resp.Header.Get("Location")
        }
    }

    //safe first cookie
    url1, _ := url.Parse("first cookie website")
    firstCookie := CookieJar.Cookies(url1)[0]
    fmt.Println("First Cookie :\\)")

    //getting second cookie and params
    // var cam []string
    var resp *http.Response
    nextURL = LoginURL
    for i := 0; i < 10; i++ {
        resp, _ = httpClient.Post(nextURL, "", nil)
        // fmt.Println("StatusCode:", resp.StatusCode)
        // fmt.Println(resp.Request.URL)
        // cam = append(cam, nextURL)
        if resp.StatusCode == 200 {
            fmt.Println("Done!")
            break
        } else {
            nextURL = resp.Header.Get("Location")
        }
    }

    //second cookie
    url2, _ := url.Parse("website second cookie is from")
    secondCookie := CookieJar.Cookies(url2)[0]
    fmt.Println("Second Cookie :\\)")

    //params
    defer resp.Body.Close()
    c, _ := ioutil.ReadAll(resp.Body)
    data := html.UnescapeString(string(c))
    //fmt.Println(data)
    getvalue := regexp.MustCompile("value=\".*\"")
    values := getvalue.FindAllStringSubmatch(data, -1)
    values[0][0] = strings.TrimSuffix(values[0][0], "\"")
    values[0][0] = strings.TrimPrefix(values[0][0], "value=\"")
    values[1][0] = strings.TrimSuffix(values[1][0], "\"")
    values[1][0] = strings.TrimPrefix(values[1][0], "value=\"")

    v := url.Values{
        "SAMLResponse": {values[1][0]},
        "RelayState":   {values[0][0]},
    }

    body := strings.NewReader(v.Encode())

    fmt.Println("Values :\\)")

    //adding values and cookies to request
    req, _ := http.NewRequest("POST", GetFinalCookieURL, body)
    req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
    req.AddCookie(firstCookie)
    req.AddCookie(secondCookie)
    resp, _ = httpClient.Do(req)

    //we got the real cookie
    url3, _ := url.Parse("website i get the cookies for")
    dbgPrintCurCookies(CookieJar.Cookies(url3))
    finalCookie := CookieJar.Cookies(url3)[0]
    finalCookie2 := CookieJar.Cookies(url3)[1]



    fmt.Println("StatusCode:", resp.StatusCode)
    fmt.Println(resp.Request.URL)
    nextURL = resp.Header.Get("Location")
    fmt.Println(nextURL)

    nextURL = "website i need the cookies for"

    req, _ = http.NewRequest("GET", nextURL, nil)
    req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
    req.AddCookie(finalCookie)
    req.AddCookie(finalCookie2)
    resp, _ = httpClient.Do(req)
    url3, _ = url.Parse("final cookie website")
    dbgPrintCurCookies(CookieJar.Cookies(url3))
    fmt.Println(resp.StatusCode)
    fmt.Println(resp.Request.URL)

    defer resp.Body.Close()
    data3, _ := ioutil.ReadAll(resp.Body)
    fmt.Println(string(data3))

}

这是我得到的 cookie 的示例:

2018/02/10 01:55:48 cookieNum=2
2018/02/10 01:55:48 Cookie [0]
2018/02/10 01:55:48 Name    =JSESSIONID
2018/02/10 01:55:48 Value   =86E2C361905167A1F64FC45C400649F2.stupo1
2018/02/10 01:55:48 Path    =
2018/02/10 01:55:48 Domain  =
2018/02/10 01:55:48 Expires =0001-01-01 00:00:00 +0000 UTC
2018/02/10 01:55:48 RawExpires=
2018/02/10 01:55:48 MaxAge  =0
2018/02/10 01:55:48 Secure  =false
2018/02/10 01:55:48 HttpOnly=false
2018/02/10 01:55:48 Raw =
2018/02/10 01:55:48 Unparsed=[]

编辑:添加了完整的代码。这是浏览器中的 cookie: Cookie in Browser

最佳答案

Cookie 有两种形式:一种是在 Set-Cookie header 中接收，另一种是在 Cookie header 中发送。只有 Set-Cookie header cookie 有过期时间和各种字段，而 Cookie header type cookie 是纯名称，值元组。这就是 cookiejar 返回的内容，因为它包含在 Cookie header 中。

stdlib 的默认 cookie jar 实现不提供提取除名称和值之外的所有 cookie 或字段的机制。如果您需要该信息，请使用任何其他开源 cookie jar 实现。

(请注意，stdlib cookie jar 实现的全部目的是透明地处理 cookie，即使是通过重定向。它不是收集有关传入的 Set-Cookie header 和其中发送的各种值的信息的解决方案。)

关于Golang cookie 的时间戳为空，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48716283/