vb.net httpwebrequest登录到EmpireAvenue.com

Question

这让我疯狂。我知道我必须关注这个。据我所知，我的请求与真实的请求相匹配，除了Cookie有点不同之外。我似乎错过了谷歌分析的。不知道这是否是问题。我被重定向，就像我应该，但在重定向页面，它要求我再次登录。任何帮助表示赞赏。这里是我的代码：

Private Function eaLogin(ByVal ticker As String, ByVal password As String) 

    Try 

     ServicePointManager.Expect100Continue = False 
     Dim request As HttpWebRequest = httpWebRequest.Create("http://www.empireavenue.com") 
     request.Credentials = CredentialCache.DefaultCredentials 
     request.CookieContainer = cookieJar 
     Dim response As HttpWebResponse = request.GetResponse() 
     Dim dataStream As Stream = response.GetResponseStream() 
     Dim reader As New StreamReader(dataStream) 
     Dim responseFromServer As String = reader.ReadToEnd() 
     reader.Close() 
     response.Close() 

     Dim session As String = "" 

     ServicePointManager.Expect100Continue = False 
     'Set the initial parameters 
     Dim UserID As String = ticker ' Username 
     Dim PWord As String = HttpUtility.UrlEncode(password) ' Password 
     Dim domain As String = "https://www.empireavenue.com/user/login/do" 
     Dim encoding As New System.Text.ASCIIEncoding 

     ' Use the appropriate HTML field names to stuff into the post header 
     Dim PostData As String = _ 
      "login_username=" & ticker & _ 
      "&login_password=" & PWord 

     Dim Data() As Byte = encoding.GetBytes(PostData) 

     ' Initialise the request 
     Dim LoginReq As Net.HttpWebRequest = Net.WebRequest.Create(domain) ' Login location taken from the form action 
     With LoginReq 
      .KeepAlive = True 
      .Method = "POST" 
      ' Note: if the page uses a redirect if will fail 
      .AllowAutoRedirect = False 
      .ContentType = "application/x-www-form-urlencoded" 
      .ContentLength = Data.Length 
      ' Set empty container 
      .CookieContainer = cookieJar 
      .Referer = "http://www.empireavenue.com/" 
      .UserAgent = userAgent 
      .Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" 
      .Host = "www.empireavenue.com" 
     End With 


     ' Add the POST data 
     Dim SendReq As IO.Stream = LoginReq.GetRequestStream 
     LoginReq.Headers.Add("Accept-Language", "en-US,en;q=0.5") 
     LoginReq.Headers.Add("Accept-Encoding", "gzip, deflate") 

     SendReq.Write(Data, 0, Data.Length) 
     SendReq.Close() 

     ' Obtain the response 
     Dim LoginRes As Net.HttpWebResponse = LoginReq.GetResponse() 

     ' Retreive the headers from the request (e.g. the location header) 

     Dim Redirect As String = LoginRes.Headers("Location") 
     ' Add any returned cookies to the cookie collection 
     cookieJar.Add(LoginRes.Cookies) 

     ' Move to the redirected page as a GET request... 
     Dim newUrl As String = "" 
     If Not (Redirect Is Nothing) Then 
      If Redirect.StartsWith("http://") Then 
       newUrl = Redirect 
      Else 
       newUrl = "https://www.empireavenue.com" & Redirect 
      End If 

      LoginReq = Net.WebRequest.Create(newUrl) 
      With LoginReq 
       .KeepAlive = False 
       .Method = "GET" 
       .ContentType = "application/x-www-form-urlencoded" 
       .AllowAutoRedirect = True 
       .CookieContainer = cookieJar 
      End With 

      ' Perform the navigate and output the HTML 
      LoginRes = LoginReq.GetResponse() 
      Dim sReader As IO.StreamReader = New IO.StreamReader(LoginRes.GetResponseStream) 
      Dim HTML As String = sReader.ReadToEnd 


      If HTML.Contains(ticker) Then 
       MessageBox.Show("yay!") 
       Return True 
      Else 
       MessageBox.Show("no!") 
       Return False 
      End If 
     Else 
      MessageBox.Show("no too!") 
      Return False 
     End If 

    Catch ex As Exception 

     MessageBox.Show(ex.Message.ToString) 
     Return False 

    End Try 

End Function 

Answer 1

我不能尝试在empirevenue因为工作的限制，但试试这个：

Dim tempCookies As CookieContainer 

ServicePointManager.Expect100Continue = False 
Dim postReq As HttpWebRequest = DirectCast(WebRequest.Create("https://www.empireavenue.com/user/login/do"), HttpWebRequest) 
Dim postData As String = "login_username=" & ticker & "&login_password=" & PWord 
Dim encoding As New UTF8Encoding 
Dim byteData As Byte() = encoding.GetBytes(postData) 
postReq.Method = "POST" 
postReq.KeepAlive = True 
postReq.CookieContainer = tempCookies 
postReq.ContentType = "application/x-www-form-urlencoded" 
postReq.Referer = "http://www.empireavenue.com/" 
postReq.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20120427 Firefox/15.0a1" 
postReq.ContentLength = byteData.Length 
Dim postreqstream As Stream = postReq.GetRequestStream() 
postreqstream.Write(byteData, 0, byteData.Length) 
postreqstream.Close() 
Dim postresponse As HttpWebResponse 
postresponse = DirectCast(postReq.GetResponse(), HttpWebResponse) 
tempCookies.Add(postresponse.Cookies) 
logincookie = tempCookies 
Dim postreqreader As New StreamReader(postresponse.GetResponseStream()) 
Dim thepage As String = postreqreader.ReadToEnd 

希望它会为你工作