Fallo al iniciar sesion

[Kaxperday]

No consigo iniciar sesion en esta web:

Código [Seleccionar] Expandir

<form action="http://www.web.com/index.php/users/dologin" method="post" accept-charset="utf-8">    <p align="center"><label>Usuario</label>    <input type="text" name="usuario" value="" id="keyboard"  /></p>

   <p align="center"><label>Contraseña</label>    <input type="password" name="contrasena" value="" id="keyboard_pwd"  /></p>

   <p align="center"><input type="submit" name="submit" value="Login"  /></p>
   </form>

Estoy usando C#uso esto:

Código (csharp) [Seleccionar] Expandir

public void signUp(string usuario, string contraseña)
       {
           string postData = "usuario=" + usuario + "&contrasena=" + contraseña + "&submit=Login";
           byte[] byteData = ASCIIEncoding.ASCII.GetBytes(postData);
           HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://www.web.com/index.php/users/dologin");
           req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";//utf-8;
           req.ContentType = "application/x-www-form-urlencoded";
           req.ContentLength = byteData.Length;
           req.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0";
           req.Host = "www.web.com";
           req.Method = "POST";
           req.Proxy = null;
           using (Stream reqStream = req.GetRequestStream())
               reqStream.Write(byteData, 0, byteData.Length);
           GetResponse(req);
       }

       private static void GetResponse(HttpWebRequest req)
       {
           HttpWebResponse response = (HttpWebResponse)req.GetResponse();
           using (Stream responseStream = response.GetResponseStream())
           {
               using (StreamReader sr = new StreamReader(responseStream))
               {
                   string responseData = sr.ReadToEnd();
                   Console.WriteLine(responseData);
                   if (responseData.Contains("Salir de"))
                       Console.WriteLine("Login successful!");
                   else
                       Console.WriteLine("Login failed!");
               }
           }
       }

¿Que puedo estar pasando por alto?, saludos y gracias.

Edito: Aporto mas informacion, el servidor me devuelve la pagina del index, si no pongo la variable usuario y la escribo mal (PE usaodi) me dice que el campo de usuario no esta rellenado, igual ocurre con la contraseña luego es algo que si que envio, pero apesar de que el nombre y usuario son correctos y consigo iniciar sesion en navegador, con el programa aun no lo he conseguido.

Saludos.

[Eleкtro]

¿Que puedo estar pasando por alto?, saludos y gracias.

1. ¿Te has asegurado de codificar los valores de los parámetros en caso de que contengan caracteres especiales como espacios en blanco, puntos, etc?:

Código (csharp) [Seleccionar] Expandir

HttpUtility.UrlEncode(usuario);
HttpUtility.UrlEncode(contraseña);

2. ¿Has comprobado que le estás pasando las cabeceras correctas?.

3. De todas formas podrías necesitar más que eso, prueba a obtener la Cookie de visitante en la página principal, y luego a loguearte usando dicha cookie,
escribí este snippet al que se le puede dar un uso más o menos genérico que podría servir para tu situación, le hice unas pequeñas modificaciones para adaptarlo a tus necesidades, solo modifica los valores de la propiedades 'UrlMain', 'UrlLogin', 'UrlLoginQueryFormat', comprueba las cabeceras que asigno en 'RequestHeadersPostLogin' sean correctas y no falten más, y por último llama al método 'CheckLogin' para evaluar el login.

VB.Net:

Código (vbnet) [Seleccionar] Expandir



    ''' <summary>
    ''' Gets the main url.
    ''' </summary>
    ''' <value>The main url.</value>
    Public ReadOnly Property UrlMain As String
        Get
            Return "http://www.cgwallpapers.com/"
        End Get
    End Property

    ''' <summary>
    ''' Gets the login url.
    ''' </summary>
    ''' <value>The login url.</value>
    Public ReadOnly Property UrlLogin As String
        Get
            Return "http://www.cgwallpapers.com/login.php"
        End Get
    End Property

    ''' <summary>
    ''' Gets the login query string format.
    ''' </summary>
    ''' <value>The login query string format.</value>
    Public ReadOnly Property UrlLoginQueryFormat As String
        Get
            Return "usuario={0}&contrasena={1}"
        End Get
    End Property

    ''' <summary>
    ''' Gets the headers for a Login POST request.
    ''' </summary>
    ''' <value>The headers for a Login POST request.</value>
    Public ReadOnly Property RequestHeadersPostLogin As WebHeaderCollection
        Get

            Dim headers As New WebHeaderCollection
            With headers
                .Add("Accept-Language", "en-us,en;q=0.5")
                .Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7")
                .Add("Keep-Alive", "99999")
            End With
            Return headers

        End Get
    End Property

    ''' <summary>
    ''' Determines whether the user is logged in the site.
    ''' </summary>
    Private isLogged As Boolean

    ''' <summary>
    ''' Gets the cookie container.
    ''' </summary>
    ''' <value>The cookie container.</value>
    Public ReadOnly Property CookieCollection As CookieCollection
        Get
            Return Me.cookieCollection1
        End Get
    End Property
    ''' <summary>
    ''' The cookie container.
    ''' </summary>
    Private cookieCollection1 As CookieCollection

    ''' <summary>
    ''' Defines the query data for a LoginPost request.
    ''' </summary>
    Private NotInheritable Class LoginQueryData

        ''' <summary>
        ''' Gets the Usuario field.
        ''' </summary>
        ''' <value>The Usuario field.</value>
        Public Property Usuario As String

        ''' <summary>
        ''' Gets or sets the Conteasena field.
        ''' </summary>
        ''' <value>The Conteasena field.</value>
        Public Property Contrasena As String

    End Class

    ''' <summary>
    ''' Gets a formatted <see cref="String"/> representation of a <see cref="LoginQueryData"/> object.
    ''' </summary>
    ''' <param name="loginQueryData">The <see cref="LoginQueryData"/> object that contains the login query fields.</param>
    ''' <returns>A formatted <see cref="String"/> representation of a <see cref="LoginQueryData"/> object.</returns>
    Private Function GetLoginQueryString(ByVal loginQueryData As LoginQueryData) As String

        Return String.Format(Me.UrlLoginQueryFormat,
                             loginQueryData.Usuario,
                             loginQueryData.Contrasena)

    End Function

    ''' <summary>
    ''' Sets the cookie container.
    ''' </summary>
    ''' <param name="url">The url.</param>
    ''' <param name="cookieCollection">The cookie collection.</param>
    ''' <returns>CookieContainer.</returns>
    Private Function SetCookieContainer(ByVal url As String,
                                        ByVal cookieCollection As CookieCollection) As CookieContainer

        Dim cookieContainer As New CookieContainer
        Dim refDate As Date

        For Each oldCookie As Cookie In cookieCollection

            If Not DateTime.TryParse(oldCookie.Value, refDate) Then

                Dim newCookie As New Cookie
                With newCookie
                    .Name = oldCookie.Name
                    .Value = oldCookie.Value
                    .Domain = New Uri(url).Host
                    .Secure = False
                End With

                cookieContainer.Add(newCookie)

            End If

        Next oldCookie

        Return cookieContainer

    End Function

    ''' <summary>
    ''' Converts cookie string to global cookie collection object.
    ''' </summary>
    ''' <param name="cookie">The cookie string.</param>
    ''' <param name="cookieCollection">The cookie collection.</param>
    Private Sub SaveCookies(ByVal cookie As String,
                            ByRef cookieCollection As CookieCollection)

        Dim cookieStrings() As String = cookie.Trim.
                                               Replace("path=/,", String.Empty).
                                               Replace("path=/", String.Empty).
                                               Split({";"c}, StringSplitOptions.RemoveEmptyEntries)

        cookieCollection = New CookieCollection

        For Each cookieString As String In cookieStrings

            If Not String.IsNullOrEmpty(cookieString.Trim) Then

                cookieCollection.Add(New Cookie(name:=cookieString.Trim.Split("="c)(0),
                                                value:=cookieString.Trim.Split("="c)(1)))

            End If

        Next cookieString

    End Sub

    ''' <summary>
    ''' Convert cookie container object to global cookie collection object.
    ''' </summary>
    ''' <param name="cookieContainer">The cookie container.</param>
    ''' <param name="cookieCollection">The cookie collection.</param>
    ''' <param name="url">The url.</param>
    Private Sub SaveCookies(ByVal cookieContainer As CookieContainer,
                            ByRef cookieCollection As CookieCollection,
                            ByVal url As String)

        cookieCollection = New CookieCollection

        For Each cookie As Cookie In cookieContainer.GetCookies(New Uri(url))

            cookieCollection.Add(cookie)

        Next cookie

    End Sub

    ''' <param name="url">The url.</param>
    ''' <param name="cookieCollection">The cookie collection.</param>
    ''' <returns><c>true</c> if successfull, <c>false</c> otherwise.</returns>
    Private Function GetMethod(ByVal url As String,
                               ByRef cookieCollection As CookieCollection) As Boolean

        Debug.WriteLine("[+] GetMethod function started.")

        Dim request As HttpWebRequest = Nothing
        Dim response As HttpWebResponse = Nothing
        Dim sr As StreamReader = Nothing
        Dim result As Boolean = False

        Try
            Debug.WriteLine("[+] Attempting to perform a request with:")
            Debug.WriteLine(String.Format("Method: {0}", "GET"))
            Debug.WriteLine(String.Format("Headers: {0}", String.Join(Environment.NewLine, Me.RequestHeadersPostLogin)))

            request = DirectCast(HttpWebRequest.Create(url), HttpWebRequest)
            With request
                .Method = "GET"
                .Headers = Me.RequestHeadersPostLogin
                .Accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"
                .UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0"
                .AllowAutoRedirect = False
                .KeepAlive = True
            End With
            Debug.WriteLine("[-] Request done.")

            ' Get the server response.
            Debug.WriteLine("[+] Getting server response...")
            response = DirectCast(request.GetResponse, HttpWebResponse)
            Debug.WriteLine("[-] Getting server response done.")

            If request.HaveResponse Then

                ' Save the cookie info.
                Debug.WriteLine("[+] Saving cookies...")
                Me.SaveCookies(response.Headers("Set-Cookie"), cookieCollection)
                Debug.WriteLine("[-] Saving cookies done.")

                ' Get the server response.
                Debug.WriteLine("[+] Getting server response...")
                response = DirectCast(request.GetResponse, HttpWebResponse)
                Debug.WriteLine("[-] Getting server response done.")

                Debug.WriteLine("[+] Reading server response...")
                sr = New StreamReader(response.GetResponseStream)
                Using sr
                    ' Read the response from the server, but we do not save it.
                    sr.ReadToEnd()
                End Using
                result = True
                Debug.WriteLine("[-] Reading server response done.")

            Else ' No response received from server.
                Throw New Exception(String.Format("No response received from server with url: {0}", url))
                result = False

            End If

        Catch ex As Exception
            Throw
            result = False

        Finally
            If sr IsNot Nothing Then
                sr.Dispose()
            End If
            If response IsNot Nothing Then
                response.Close()
            End If

        End Try

        Debug.WriteLine("[-] GetMethod function finished.")
        Debug.WriteLine("[i] Returning result value...")
        Return result

    End Function

    ''' <param name="loginData">The login post data.</param>
    ''' <param name="cookieCollection">The cookie collection.</param>
    ''' <returns><c>true</c> if successfull, <c>false</c> otherwise.</returns>
    Private Function PostLoginMethod(ByVal loginData As LoginQueryData,
                                     ByRef cookieCollection As CookieCollection) As Boolean

        Debug.WriteLine("[+] PostLoginMethod function started.")

        Dim request As HttpWebRequest = Nothing
        Dim response As HttpWebResponse = Nothing
        Dim sw As StreamWriter = Nothing
        Dim initialCookieCount As Integer = 0
        Dim postData As String
        Dim result As Boolean = False

        Try
            Debug.WriteLine("[+] Attempting to perform a login request with:")
            Debug.WriteLine(String.Format("Method: {0}", "POST"))
            Debug.WriteLine(String.Format("Referer: {0}", Me.UrlMain))
            Debug.WriteLine(String.Format("Accept: {0}", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"))
            Debug.WriteLine(String.Format("ContentType: {0}", "application/x-www-form-urlencoded"))
            Debug.WriteLine(String.Format("Headers: {0}", String.Join(Environment.NewLine, Me.RequestHeadersPostLogin)))

            request = DirectCast(HttpWebRequest.Create(Me.UrlLogin), HttpWebRequest)
            With request
                .Method = "POST"
                .Headers = Me.RequestHeadersPostLogin
                .Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
                .ContentType = "application/x-www-form-urlencoded"
                .UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0"
                .Referer = Me.UrlMain
            End With
            Debug.WriteLine("[-] Request done.")

            Debug.WriteLine("[+] Passing request cookie info...")
            If cookieCollection IsNot Nothing Then ' Pass cookie info from the login page.
                request.CookieContainer = Me.SetCookieContainer(Me.UrlLogin, cookieCollection)
            End If
            Debug.WriteLine("[-] Passing request cookie info done.")

            ' Set the post data.
            Debug.WriteLine("[+] Setting post data with:")
            Debug.WriteLine(String.Format("Usuario: {0}", loginData.Usuario))
            Debug.WriteLine(String.Format("Contrasena: {0}", loginData.Contrasena))
            postData = Me.GetLoginQueryString(loginData)

            sw = New StreamWriter(request.GetRequestStream)
            Using sw
                sw.Write(postData) ' Post the data to the server.
            End Using
            Debug.WriteLine("[-] Setting post data done.")

            ' Get the server response.
            Debug.WriteLine("[+] Getting server response...")
            initialCookieCount = request.CookieContainer.Count
            response = DirectCast(request.GetResponse, HttpWebResponse)
            Debug.WriteLine("[-] Getting server response done.")

            If request.CookieContainer.Count > initialCookieCount Then ' Login successful.
                result = True

            Else ' Login unsuccessful.
                result = False

            End If

            Debug.WriteLine(String.Format("[i] Login response result is: {0}",
                                          If(result, "Successful (True)",
                                                     "Unsuccessful (False)")))

            If result Then ' Save new login cookies.
                Debug.WriteLine("[+] Saving new login cookies...")
                Me.SaveCookies(request.CookieContainer, cookieCollection, Me.UrlMain)
                Debug.WriteLine("[-] Saving new login cookies done.")
            End If

        Catch ex As Exception
            Throw

        Finally
            If sw IsNot Nothing Then
                sw.Dispose()
            End If
            If response IsNot Nothing Then
                response.Close()
            End If

        End Try

        Debug.WriteLine("[-] PostLoginMethod function finished.")
        Debug.WriteLine("[i] Returning result value...")
        Me.isLogged = result
        Return result

    End Function

    ''' <summary>
    ''' Determines whether the account can log in CGWallpapers site.
    ''' </summary>
    ''' <returns><c>true</c> if the account can log in CGWallpapers site, <c>false</c> otherwise.</returns>
    Public Function CheckLogin(ByVal username As String,
                               ByVal password As String) As Boolean

        If Me.GetMethod(Me.UrlMain, Me.cookieCollection1) Then

            Dim loginQueryData As New LoginQueryData With
                  {
                      .Usuario = HttpUtility.UrlEncode(username),
                      .Contrasena = HttpUtility.UrlEncode(password)
                  }
            Return Me.PostLoginMethod(loginQueryData, Me.cookieCollection1)

        Else
            Return False

        End If ' Me.GetMethod

    End Function


Traducción online a C# (sin testear):

Código (csharp) [Seleccionar] Expandir


/// <summary>
/// Gets the main url.
/// </summary>
/// <value>The main url.</value>
public string UrlMain {
get { return "http://www.cgwallpapers.com/"; }
}

/// <summary>
/// Gets the login url.
/// </summary>
/// <value>The login url.</value>
public string UrlLogin {
get { return "http://www.cgwallpapers.com/login.php"; }
}

/// <summary>
/// Gets the login query string format.
/// </summary>
/// <value>The login query string format.</value>
public string UrlLoginQueryFormat {
get { return "usuario={0}&contrasena={1}"; }
}

/// <summary>
/// Gets the headers for a Login POST request.
/// </summary>
/// <value>The headers for a Login POST request.</value>
public WebHeaderCollection RequestHeadersPostLogin {

get {
WebHeaderCollection headers = new WebHeaderCollection();
var _with1 = headers;
_with1.Add("Accept-Language", "en-us,en;q=0.5");
_with1.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7");
_with1.Add("Keep-Alive", "99999");
return headers;

}
}

/// <summary>
/// Determines whether the user is logged in the site.
/// </summary>

private bool isLogged;
/// <summary>
/// Gets the cookie container.
/// </summary>
/// <value>The cookie container.</value>
public CookieCollection CookieCollection {
get { return this.cookieCollection1; }
}
/// <summary>
/// The cookie container.
/// </summary>

private CookieCollection cookieCollection1;
/// <summary>
/// Defines the query data for a LoginPost request.
/// </summary>
private sealed class LoginQueryData
{

/// <summary>
/// Gets the Usuario field.
/// </summary>
/// <value>The Usuario field.</value>
public string Usuario { get; set; }

/// <summary>
/// Gets or sets the Conteasena field.
/// </summary>
/// <value>The Conteasena field.</value>
public string Contrasena { get; set; }

}

/// <summary>
/// Gets a formatted <see cref="String"/> representation of a <see cref="LoginQueryData"/> object.
/// </summary>
/// <param name="loginQueryData">The <see cref="LoginQueryData"/> object that contains the login query fields.</param>
/// <returns>A formatted <see cref="String"/> representation of a <see cref="LoginQueryData"/> object.</returns>
private string GetLoginQueryString(LoginQueryData loginQueryData)
{

return string.Format(this.UrlLoginQueryFormat, loginQueryData.Usuario, loginQueryData.Contrasena);

}

/// <summary>
/// Sets the cookie container.
/// </summary>
/// <param name="url">The url.</param>
/// <param name="cookieCollection">The cookie collection.</param>
/// <returns>CookieContainer.</returns>
private CookieContainer SetCookieContainer(string url, CookieCollection cookieCollection)
{

CookieContainer cookieContainer = new CookieContainer();
System.DateTime refDate = default(System.DateTime);


foreach (Cookie oldCookie in cookieCollection) {

if (!DateTime.TryParse(oldCookie.Value, refDate)) {
Cookie newCookie = new Cookie();
var _with2 = newCookie;
_with2.Name = oldCookie.Name;
_with2.Value = oldCookie.Value;
_with2.Domain = new Uri(url).Host;
_with2.Secure = false;

cookieContainer.Add(newCookie);

}

}

return cookieContainer;

}

/// <summary>
/// Converts cookie string to global cookie collection object.
/// </summary>
/// <param name="cookie">The cookie string.</param>
/// <param name="cookieCollection">The cookie collection.</param>

private void SaveCookies(string cookie, ref CookieCollection cookieCollection)
{
string[] cookieStrings = cookie.Trim.Replace("path=/,", string.Empty).Replace("path=/", string.Empty).Split({ ';' }, StringSplitOptions.RemoveEmptyEntries);

cookieCollection = new CookieCollection();


foreach (string cookieString in cookieStrings) {

if (!string.IsNullOrEmpty(cookieString.Trim)) {
cookieCollection.Add(new Cookie(name: cookieString.Trim.Split('=')(0), value: cookieString.Trim.Split('=')(1)));

}

}

}

/// <summary>
/// Convert cookie container object to global cookie collection object.
/// </summary>
/// <param name="cookieContainer">The cookie container.</param>
/// <param name="cookieCollection">The cookie collection.</param>
/// <param name="url">The url.</param>

private void SaveCookies(CookieContainer cookieContainer, ref CookieCollection cookieCollection, string url)
{
cookieCollection = new CookieCollection();


foreach (Cookie cookie in cookieContainer.GetCookies(new Uri(url))) {
cookieCollection.Add(cookie);

}

}

/// <param name="url">The url.</param>
/// <param name="cookieCollection">The cookie collection.</param>
/// <returns><c>true</c> if successfull, <c>false</c> otherwise.</returns>
private bool GetMethod(string url, ref CookieCollection cookieCollection)
{

Debug.WriteLine("[+] GetMethod function started.");

HttpWebRequest request = null;
HttpWebResponse response = null;
StreamReader sr = null;
bool result = false;

try {
Debug.WriteLine("[+] Attempting to perform a request with:");
Debug.WriteLine(string.Format("Method: {0}", "GET"));
Debug.WriteLine(string.Format("Headers: {0}", string.Join(Environment.NewLine, this.RequestHeadersPostLogin)));

request = (HttpWebRequest)HttpWebRequest.Create(url);
var _with3 = request;
_with3.Method = "GET";
_with3.Headers = this.RequestHeadersPostLogin;
_with3.Accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
_with3.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0";
_with3.AllowAutoRedirect = false;
_with3.KeepAlive = true;
Debug.WriteLine("[-] Request done.");

// Get the server response.
Debug.WriteLine("[+] Getting server response...");
response = (HttpWebResponse)request.GetResponse;
Debug.WriteLine("[-] Getting server response done.");


if (request.HaveResponse) {
// Save the cookie info.
Debug.WriteLine("[+] Saving cookies...");
this.SaveCookies(response.Headers("Set-Cookie"), ref cookieCollection);
Debug.WriteLine("[-] Saving cookies done.");

// Get the server response.
Debug.WriteLine("[+] Getting server response...");
response = (HttpWebResponse)request.GetResponse;
Debug.WriteLine("[-] Getting server response done.");

Debug.WriteLine("[+] Reading server response...");
sr = new StreamReader(response.GetResponseStream);
using (sr) {
// Read the response from the server, but we do not save it.
sr.ReadToEnd();
}
result = true;
Debug.WriteLine("[-] Reading server response done.");

// No response received from server.
} else {
throw new Exception(string.Format("No response received from server with url: {0}", url));
result = false;

}

} catch (Exception ex) {
throw;
result = false;

} finally {
if (sr != null) {
sr.Dispose();
}
if (response != null) {
response.Close();
}

}

Debug.WriteLine("[-] GetMethod function finished.");
Debug.WriteLine("[i] Returning result value...");
return result;

}

/// <param name="loginData">The login post data.</param>
/// <param name="cookieCollection">The cookie collection.</param>
/// <returns><c>true</c> if successfull, <c>false</c> otherwise.</returns>
private bool PostLoginMethod(LoginQueryData loginData, ref CookieCollection cookieCollection)
{

Debug.WriteLine("[+] PostLoginMethod function started.");

HttpWebRequest request = null;
HttpWebResponse response = null;
StreamWriter sw = null;
int initialCookieCount = 0;
string postData = null;
bool result = false;

try {
Debug.WriteLine("[+] Attempting to perform a login request with:");
Debug.WriteLine(string.Format("Method: {0}", "POST"));
Debug.WriteLine(string.Format("Referer: {0}", this.UrlMain));
Debug.WriteLine(string.Format("Accept: {0}", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"));
Debug.WriteLine(string.Format("ContentType: {0}", "application/x-www-form-urlencoded"));
Debug.WriteLine(string.Format("Headers: {0}", string.Join(Environment.NewLine, this.RequestHeadersPostLogin)));

request = (HttpWebRequest)HttpWebRequest.Create(this.UrlLogin);
var _with4 = request;
_with4.Method = "POST";
_with4.Headers = this.RequestHeadersPostLogin;
_with4.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
_with4.ContentType = "application/x-www-form-urlencoded";
_with4.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0";
_with4.Referer = this.UrlMain;
Debug.WriteLine("[-] Request done.");

Debug.WriteLine("[+] Passing request cookie info...");
// Pass cookie info from the login page.
if (cookieCollection != null) {
request.CookieContainer = this.SetCookieContainer(this.UrlLogin, cookieCollection);
}
Debug.WriteLine("[-] Passing request cookie info done.");

// Set the post data.
Debug.WriteLine("[+] Setting post data with:");
Debug.WriteLine(string.Format("Usuario: {0}", loginData.Usuario));
Debug.WriteLine(string.Format("Contrasena: {0}", loginData.Contrasena));
postData = this.GetLoginQueryString(loginData);

sw = new StreamWriter(request.GetRequestStream);
using (sw) {
sw.Write(postData);
// Post the data to the server.
}
Debug.WriteLine("[-] Setting post data done.");

// Get the server response.
Debug.WriteLine("[+] Getting server response...");
initialCookieCount = request.CookieContainer.Count;
response = (HttpWebResponse)request.GetResponse;
Debug.WriteLine("[-] Getting server response done.");

// Login successful.
if (request.CookieContainer.Count > initialCookieCount) {
result = true;

// Login unsuccessful.
} else {
result = false;

}

Debug.WriteLine(string.Format("[i] Login response result is: {0}", result ? "Successful (True)" : "Unsuccessful (False)"));

// Save new login cookies.
if (result) {
Debug.WriteLine("[+] Saving new login cookies...");
this.SaveCookies(request.CookieContainer, ref cookieCollection, this.UrlMain);
Debug.WriteLine("[-] Saving new login cookies done.");
}

} catch (Exception ex) {
throw;

} finally {
if (sw != null) {
sw.Dispose();
}
if (response != null) {
response.Close();
}

}

Debug.WriteLine("[-] PostLoginMethod function finished.");
Debug.WriteLine("[i] Returning result value...");
this.isLogged = result;
return result;

}


/// <summary>
/// Determines whether the account can log in CGWallpapers site.
/// </summary>
/// <returns><c>true</c> if the account can log in CGWallpapers site, <c>false</c> otherwise.</returns>
public bool CheckLogin(string username, string password)
{


if (this.GetMethod(this.UrlMain, this.cookieCollection1)) {
LoginQueryData loginQueryData = new LoginQueryData {
Usuario = HttpUtility.UrlEncode(username),
Contrasena = HttpUtility.UrlEncode(password)
};
return this.PostLoginMethod(loginQueryData, this.cookieCollection1);

} else {
return false;

}
// Me.GetMethod

}

//=======================================================
//Service provided by Telerik (www.telerik.com)
//=======================================================

[Kaxperday]

Hola elektro gracias por la respuesta, las variables si que estan codificadas:

Código (csharp) [Seleccionar] Expandir

string postData = "usuario=" + usuario + "&contrasena=" + contraseña + "&submit=Login";
            byte[] byteData = ASCIIEncoding.ASCII.GetBytes(postData);

He mirado con wireshark lo que mando y parece estar todo correcto el tamaño de cadena, todo.

Funciona bien pero sigo sin saber porque no logea, porque no me devuelve esa página una vez iniciada la sesión.

Saludos.

[Eleкtro]

las variables si que estan codificadas:

Código (csharp) [Seleccionar] Expandir

string postData = "usuario=" + usuario + "&contrasena=" + contraseña + "&submit=Login";
           byte[] byteData = ASCIIEncoding.ASCII.GetBytes(postData);

Por codificar me refiero a la codificación html, no a codificar el string en una secuencia de bytes cómo estás haciendo.

Si el usuario/contraseña contiene por ejemplo un espacio entonces vas a codificar 1 byte " " en lugar de codificar los caracteres "%20", ¿me entiendes?.

Porfavor, aclara si el usuario/contraseña contienen espacios u otros caracteres ilegales para descartar que ese sea el problema,
si tienes dudas vuelve a leer la pregunta nº1 que hice en el comentario anterior donde mostré un ejemplo de cómo codificar el string (primero codificas el usuario/contraseña a html, y luego generas los bytes cómo estabas haciendo, pero con el usuario/contraseña codificados a html).

Saludos!

[Kaxperday]

Hola socio no creo que sea problema, la cadena que mando en el POST detectada por el wireshark es la siguiente:

usuario=ASJDIAJI&contrasena=AKJDFIAJIFJ&submit=Login

Son solo mayúsculas ni espacios ni carácteres extraños, no creo que radique ahí el problema, pero se puede investigar más.

Gracias y un saludo.

[kub0x]

Muy buenas he visto que estabas en apuros y esto ya lo discutimos hace un tiempo. Ese code en C# me suena jejej

Edito: Aporto mas informacion, el servidor me devuelve la pagina del index.

¿Quieres decir que cuando introduces el user/passwd correcto te lleva al index? Yo lo que suelo hacer para construir peticiones HTTP es analizarlas primero con un FireBug en Firefox para determinar las cabeceras de la solicitud y POST (en este caso, pero lo mismo con GET). Dale una oportunidad y nos cuentas. Cuanta mas info nos des mejor.

Fíjate que el header "Host" no lo tienes seteado a la web que lanzas el POST. Quizá lo quisiste poner así en este post, pero lo remarco por si acaso.

Código (C#) [Seleccionar] Expandir

req.Host = "www.web.com"

Saludos.

[Kaxperday]

Claro! Es correcto en vez de web pone el nombre de dominio de la página. Precioso code por cierto en el FORM pone que es método POST, no sé el problema es ese que me vuelve al index como si no he hecho nada, cuando los datos son correctos y no se usar firebug a ese nivel xP, soy mas de live HTTP HEADERS y copiar la cabecera de inicio de sesión que en este caso no funciona para mi programa xp.

Haber como va gracias.