Question

这让我疯了。我知道我必须接近这一点。据我所知，我的请求与真实的请求相匹配，但cookie有点不同。我似乎错过了谷歌分析。不确定这是不是问题。我被重定向，就像我应该的那样但是在重定向页面上它要求我再次登录。任何帮助表示赞赏。这是我的代码：

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

由于工作上的限制，我无法在帝国大道上尝试，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

希望它对您有用

vb.net httpwebrequest登录EmpireAvenue.com

1 个答案: