c#验证码模拟登录

Question

cookie 本来就是会提交上去的

Answer 1

 private CookieContainer cc = new CookieContainer();//实例
    static System.Text.Encoding encoding = System.Text.Encoding.UTF8;
    public string Post(string url, NameValueCollection nvc)//提交数据
    {
        StringBuilder sb = new StringBuilder();
        foreach (string key in nvc.AllKeys)
        {
            sb.Append(key + "=" + HttpUtility.UrlEncode(nvc[key]) + "&");
        }
        HttpWebRequest wc = (HttpWebRequest)HttpWebRequest.Create(url);
        wc.CookieContainer = cc;
        if (!string.IsNullOrEmpty(sb.ToString()))
        {
            wc.Accept = "image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, */*";
            wc.ContentType = "application/x-www-form-urlencoded";
            wc.Referer = "http://oa.plusbe.com/Admin/Login.aspx";
            wc.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; Shuame)";
            wc.Headers.Add("Accept-Language", "zh-cn");
            wc.Headers.Add("UA-CPU", "x86");
            wc.AllowAutoRedirect = true;
            wc.Method = "POST";
            string postData = sb.ToString().TrimEnd('&');
            byte[] postBuffer = encoding.GetBytes(postData);
            wc.ContentLength = postBuffer.Length;
            using (Stream stream = wc.GetRequestStream())
            {
                stream.Write(postBuffer, 0, postBuffer.Length);
                stream.Flush();
                stream.Close();
            }
        }
        
        using (HttpWebResponse res = (HttpWebResponse)wc.GetResponse())//处理接收
        {
            Stream response = res.GetResponseStream();
            if (wc.CookieContainer != null)
            {
                res.Cookies = wc.CookieContainer.GetCookies(wc.RequestUri);
            }
            string responseUrl = res.ResponseUri.ToString();
            StreamReader sr = new StreamReader(response);
            string c = sr.ReadToEnd();
            Console.WriteLine(c);
            return c;
        }
    }    public string GetVerifyCode(string sourceUrl, string saveVirtualAddress)//获取验证码
    {
        
        CookieContainer cc = new CookieContainer();
        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(sourceUrl);
        req.CookieContainer = cc;
        using (WebResponse res = req.GetResponse())
        {            System.Drawing.Image bmp = Bitmap.FromStream(res.GetResponseStream());
            string fn = System.IO.Path.Combine(SysConfig.ApplicationPath + saveVirtualAddress.TrimEnd('/') + "/", Guid.NewGuid().ToString() + ".jpg");
            string address = HttpContext.Current.Server.MapPath(fn);
            bmp.Save(address, ImageFormat.Jpeg);
    
            return fn;
        }
        
    }源码。。cc一直未空

Answer 2

你要自己解析验证码啊？
request.CookieContainer = new CookieContainer();
foreach (string ItemName in Request.Cookies.AllKeys)
{
    request.CookieContainer.Add(new Cookie 
    {
        Name = Request.Cookies[ItemName].Name,
        Value = Request.Cookies[ItemName].Value,
        Domain = Request.Cookies[ItemName].Domain,
        HttpOnly = Request.Cookies[ItemName].HttpOnly,
        Expires = Request.Cookies[ItemName].Expires,
        Path = Request.Cookies[ItemName].Path 
    });
}

Answer 3

没看到你给 cc 添加值
wc.Method = "POST"; 改成 GET  

Answer 4

验证码是手动输入的，  NameValueCollection v = new NameValueCollection();
        v.Add("username", "xingch50");
        v.Add("password", "mygoogle");
        v.Add("checkNum", code);
        string ceshi = Post(url, v);