返回的HttpResult的Cookie字符串不为空，CookieCollection却为空的解决办法

紫枫闲人

今天遇到个问题，一个网站登录请求返回的HttpResult的Cookie字符串不为空，CookieCollection的Count却为0。返回的Cookie字符串是这样：

[SQL] 纯文本查看 复制代码

JSESSIONID=EB3A9A7D49A4AB4C44D7838821CC8D48; Secure; HttpOnly; Expires=07-08-2019 13:16:01,
_tf_sso_main_session_id=EB3A9A7D49A4AB4C44D7838821CC8D48; Domain=aaa.cn; Path=/; HttpOnly

返回了2个cookie，第一个cookie却没有Domain设置，经过测试后发现，HttpWebResponse response在解析cookie的时候，如果这个cookie没有设置Domian，就会引发异常，导致这个以后的所有cookie都不会被解析进response.cookies中，这是导致这个问题的原因。
知道了原因，处理办法就很简单了，如果发现Cookie字符串不为空，CookieCollection的Count为0的情况，就手动解析Cookie字符串，把没有Domian的cookie手动加上当前访问的Host，然后把Cookie加入手动创建CookieCollection中，代码如下：

HTTP访问处理：

[C#] 纯文本查看 复制代码

HttpResult ret = m_hb.GetHtml(itm);

            if (ret.Cookie.Split(',').Length > ret.CookieCollection.Count)
            {
                string host = ret.Header["Host"];
                if (null == host || host.Length == 0)
                {
                    Uri uri = new Uri(itm.URL);
                    host = uri.Host;
                }
                CookieCollection cookielist = BaseTool.StrCookieToCookieCollection(host, ret.Cookie);
                cookie.Add(cookielist);
            }
            else
            {
                cookie.Add(ret.CookieCollection);
            }

StrCookieToCookieCollection实现：

[C#] 纯文本查看 复制代码

public CookieCollection StrCookieToCookieCollection(string baseDomain, string cookiestr)
        {
            CookieCollection cc = new CookieCollection();


            string[] cookies = cookiestr.Split(',');


            foreach(string c in cookies)
            {
                Cookie cookie = new Cookie();
                string[] list = c.ToString().Split(new string[] { ",", ";" }, StringSplitOptions.RemoveEmptyEntries);
                foreach (string item in list)
                {
                    string itemcookie = item.ToLower().Trim().Replace("\r\n", string.Empty).Replace("\n", string.Empty);
                    //排除空字符串
                    if (string.IsNullOrWhiteSpace(itemcookie)) continue;
                    else if (!itemcookie.Contains("="))
                    {
                        if(itemcookie == "httponly")
                            cookie.HttpOnly = true;
                        else if(itemcookie == "secure")
                            cookie.Secure = true;
                    }
                    else if (itemcookie.Contains("path="))
                    {
                        cookie.Path = itemcookie.Replace("path=", string.Empty);
                    }
                    else if (itemcookie.Contains("expires="))
                    {
                        cookie.Expires = Convert.ToDateTime(itemcookie.Replace("expires=", string.Empty));
                    }
                    else if (itemcookie.Contains("domain="))
                    {
                        cookie.Domain = itemcookie.Replace("domain=", string.Empty);
                    }
                    else
                    {
                        string[] kv = item.ToString().Replace("\r\n", string.Empty).Replace("\n", string.Empty).Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries);
                        if (kv.Length == 2)
                        {
                            cookie.Name = kv[0].Trim();
                            cookie.Value = kv[1].Trim();
                        }
                    }
                }


                if (cookie.Domain.Length == 0)
                {
                    cookie.Domain = baseDomain;
                }


                cc.Add(cookie);
            }


            return cc;
        }

这么处理，就解决了没有Domian的Cookie不能被记录的问题。

紫枫闲人

编辑不了了，上面的HTTP访问处理代码可以优化一下：

[C#] 纯文本查看 复制代码

HttpResult ret = m_hb.GetHtml(itm);

            if (ret.Cookie.Split(',').Length > ret.CookieCollection.Count)
            {
                string host = ret.Header["Host"];
                if (null == host || host.Length == 0)
                {
                    Uri uri = new Uri(itm.URL);
                    host = uri.Host;
                }
                CookieCollection cookielist = BaseTool.StrCookieToCookieCollection(host, ret.Cookie);
                cookie.Add(cookielist);
            }
            else
            {
                cookie.Add(ret.CookieCollection);
            }

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