从 url 读取 Json 无需下载

Question

我想从 URL 读取 Json 字符串，但是当我使用 Chrome 网页时会显示这个字符串：

当我使用 C# WebBrowser 时，它要求我下载文件以阅读我尝试使用 WebClient DownloadString 但此站点使用登录页面中的 cookie，它显示 arlert "Request Invaild":

请帮助我，如果我的英语不好，我很抱歉

更新： 这是我的代码：

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");

更新 2： 我尝试 get/set cookie，但它不起作用。

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

看看这个开源 JSON 框架：http://www.newtonsoft.com/json

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

Answer 2

您尝试通过浏览器控件发送带有 cookie 的查询，但属性 cookie 不包含 httpOnly cookie => 因此您没有会话 cookie。

获取 httpOnly 有点棘手。

将此代码添加到您的 class 以便您可以获得 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();
}

你可以通过下面的代码得到json

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();
        }
    }
}

从 url 读取 Json 无需下载

Read Json from url without download

c#

json

webbrowser-control

winforms