无法使用HttpWebRequests登录 [英] Can't login with HttpWebRequests

问题描述

我正在尝试使用httpwerequests登录一个论坛，但到目前为止我还没有成功，这是我的代码:

i am trying to login to a forum with httpwerequests but i had no success so far, this is my code:

string url = "http://www.warriorforum.com/";

var bytes = Encoding.Default.GetBytes(@"vb_login_username=MyUsername&cookieuser=1&vb_login_password=&s=&securitytoken=guest&do=login&vb_login_md5password=d9350bad28eee253951d7c5211e50179&vb_login_md5password_utf=d9350bad28eee253951d7c5211e50179");
var container = new CookieContainer();

var request = (HttpWebRequest)(WebRequest.Create(url));
request.CookieContainer = container;
request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/535.2";
request.ContentLength = bytes.Length;
request.Method = "POST";
request.KeepAlive = true;
request.AllowAutoRedirect = true;
request.AllowWriteStreamBuffering = true;
request.CookieContainer = container;
using (var requestStream = request.GetRequestStream())
    requestStream.Write(bytes, 0, bytes.Length);

var requestResponse = request.GetResponse();
using (var responsStream = requestResponse.GetResponseStream())
{
    if (responsStream != null)
    {
        using (var responseReader = new StreamReader(responsStream))
        {
            var responseStreamReader = responseReader.ReadToEnd();
            richTextBox1.Text = responseStreamReader; //this is to read the page source after the request
        }
    }
}

在请求之后，响应是相同的页面，没有任何更改，没有消息告诉我我输入了错误的密码或类似的内容.

After the request the response is just the same page, nothing changed, no message telling me that i input wrong password or something like that.

推荐答案

我刚刚使用通用的VBulletin登录功能进行了测试，它似乎运行良好:

I just tested using my generic VBulletin login function and it seemed to work fine:

private static bool VBulletinLogin(Uri loginUrl, string user, string password)
{
    var postParams = new[] {
        new HttpParam("vb_login_username", user),
        new HttpParam("cookieuser", "1"),
        new HttpParam("vb_login_password", password),
        new HttpParam("securitytoken", "guest"),
        new HttpParam("do", "login"),
    };

    var http = new HttpContext();
    var src = http.GetEncodedPageData(loginUrl, HttpRequestType.POST, postParams);
    return src.ResponseData.Contains("Thank you for logging in");
}

不幸的是，这使用了我的HttpContext类，该类是我一直在编写的库的一部分，并且功能相互交织.但是，希望它至少会让您对后置参数有所了解.我还从我自己的班级中提供了一些有用的结构/函数，应该会有所帮助. (请注意，需要引用.NET 3.5 System.Web命名空间.

Unfortunately, this uses my HttpContext class, which is part of a library I've been writing and the features are fairly intertwined. Hopefully, however, it will at least give you an idea of the post params. I've also included a few helpful structs/functions from my own class which should help. (note, requires a reference to the .NET 3.5 System.Web namespace.

第一个有用的结构HttpParam:

First helpful struct, HttpParam:

public struct HttpParam
{
    private string _key;
    private string _value;

    public string Key { get { return HttpUtilty.UrlEncode(_key); } set { _key = value; } }
    public string Value { get { return HttpUtility.UrlEncode(_value); } set { _value = value; } }

    public HttpParam(string key, string value)
    {
        _key = key;
        _value = value;
    }

    public override string ToString()
    {
        return string.Format("{0}={1}", Key, Value);
    }
};

与之配套的功能:

private static string GetQueryString(HttpParam[] args)
{
    return args != null
            ? string.Join("&", Array.ConvertAll(args, arg => arg.ToString()))
            : string.Empty;
}

这些的组合将帮助您生成一致，安全的查询字符串.因此，在上述情况下:

The combination of these will help you to generate consistent, safe query strings. So in the above case:

var postParams = new[] {
    new HttpParam("vb_login_username", user),
    new HttpParam("cookieuser", "1"),
    new HttpParam("vb_login_password", password),
    new HttpParam("securitytoken", "guest"),
    new HttpParam("do", "login"),
};

var queryString = GetQueryString(postParams);

将为您提供类似的东西:

Would get you something like:

vb_login_username=<user>&cookieuser=1&vb_login_password=<password>&securitytoken=guest&do=login

然后可以使用类似于您已经发布的内容的方式，只需确保您具有正确的URL.获取查询字符串字节时，我还将使用UTF8编码.例如(使用您的原始代码，稍作修改)

Then something similar to what you already have for posting could be used, just ensure you have the correct URL. I'd also use UTF8 encoding when getting the query string bytes. For example (using your original code, slightly modified)

var postParams = new[] {
    new HttpParam("vb_login_username", "yourusername"),
    new HttpParam("cookieuser", "1"),
    new HttpParam("vb_login_password", "yourpassword"),
    new HttpParam("securitytoken", "guest"),
    new HttpParam("do", "login"),
};

string url = "http://warriorforum.com/login.php?do=login";
var container = new CookieContainer();
var buffer = Encoding.UTF8.GetBytes(GetQueryString(postParams));

var request = (HttpWebRequest)HttpWebRequest.Create(url);
request.CookieContainer = container;
request.UserAgent = "Mozilla/5.0";
request.Method = "POST";
request.KeepAlive = true;
request.AllowAutoRedirect = true;
request.CookieContainer = container;
request.ContentLength = buffer.Length;
request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";

using (var requestStream = request.GetRequestStream())
    requestStream.Write(buffer, 0, buffer.Length);

using (var response = request.GetResponse())
{
    if (response.StatusCode == HttpStatusCode.OK || response.StatusCode == HttpStatusCode.NotModified)
    {
        using (var reader = new StreamReader(response.GetResponseStream()))
        {
            var result = reader.ReadToEnd();
            richTextBox1.Text = result; //this is to read the page source after the request
        }
    }
}

也请注意ContentType的更改.

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