Read Json from url without download

Question

I want to read Json string from URL, but when I using Chrome web page will show this string:

And when I using C# WebBrowser it ask me download file to read I try to use WebClient DownloadString but this site use cookie from login page and it show arlert "Request Invaild":

Please help me, I'm sorry if my English is not good

Update: Here is my code:

wbTest.Navigate("http://authen.dzogame.com:8080/LauncherLogin.aspx?gid=200");
wbTest.Document.GetElementById("tbxUserName").SetAttribute("value", "7honda");
wbTest.Document.GetElementById("tbxPassword").SetAttribute("value", "111111");
wbTest.Document.GetElementById("btnLogin").InvokeMember("click");

Update 2: I try to get/set cookie, but it's not working.

wb.Navigate("http://authen.dzogame.com:8080/LauncherLogin.aspx?gid=200");
Wait();
id = txtID.Text;
pass = txtPassword.Text;
wb.Document.GetElementById("tbxUserName").SetAttribute("value", id);
wb.Document.GetElementById("tbxPassword").SetAttribute("value", pass);
wb.Document.GetElementById("btnLogin").InvokeMember("Click");
Wait();
string cookie = wb.Document.Cookie;
WebClient wc = new WebClient();
wc.Headers.Add(HttpRequestHeader.Cookie, cookie);
string token = wc.DownloadString("http://authen.dzogame.com:8080/ReturnLogin.ashx");

Answer 1

You trying to send the query with cookies from your browser control but the property cookie doesn't contain httpOnly cookie => so you you don't have the session cookie.

Getting the httpOnly is a little bit triky.

1. Add this code to your class so you can get the httpOnly cookie.

   [DllImport("wininet.dll", SetLastError = true)]
   public static extern bool InternetGetCookieEx(
   string url,
   string cookieName,
   StringBuilder cookieData,
   ref int size,
   Int32 dwFlags,
   IntPtr lpReserved);
   
   private const Int32 InternetCookieHttponly = 0x2000;
   
   /// <summary>
   /// Gets the URI cookie container.
   /// </summary>
   /// <param name="uri">The URI.</param>
   /// <returns></returns>
   public static string GetUriCookieContainer(Uri uri)
   {
       // Determine the size of the cookie
       int datasize = 8192 * 16;
       StringBuilder cookieData = new StringBuilder(datasize);
       if (!InternetGetCookieEx(uri.ToString(), null, cookieData, ref datasize, InternetCookieHttponly, IntPtr.Zero))
       {
           if (datasize < 0)
               return null;
           // Allocate stringbuilder large enough to hold the cookie
           cookieData = new StringBuilder(datasize);
           if (!InternetGetCookieEx(
               uri.ToString(),
               null, cookieData,
               ref datasize,
               InternetCookieHttponly,
               IntPtr.Zero))
               return null;
       }
       return cookieData.ToString();
   }
   

2. You can get the json like with the code below

   private void func()
   {
       // your code for login here ....
   
   
   
   
       var urlJson = new Uri("http://authen.dzogame.com:8080/LauncherLogin.aspx?gid=200");
   
       var cookie = GetUriCookieContainer(urlJson);
   
       HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://authen.dzogame.com:8080/ReturnLogin.ashx");
       request.Headers.Add(HttpRequestHeader.Cookie, cookie);
       request.Accept = "*/*";
       string jsonResponse = null;
       using (WebResponse response = request.GetResponse())
       {
           using (StreamReader streamReader = new StreamReader(response.GetResponseStream()))
           {
               jsonResponse = streamReader.ReadToEnd();
           }
       }
   }
   

Answer 2

Take a look at this open source JSON Framework : http://www.newtonsoft.com/json

dynamic responseObject = JsonConvert.DeserializeObject("{\"status\":\"1\"...");