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Imports System.Net Imports System.IO Imports System.Text Public Class Form1 Const ConnectURL = "http://www.raineggplant.com/logon.php" Const HomeURL = "http://www.raineggplant.com" Private Function RegularPage(ByVal URL As String, ByVal CookieJar As CookieContainer) As String '携带CookieJar中的Cookie访问URL Dim reader As StreamReader Dim Request As HttpWebRequest = HttpWebRequest.Create(URL) Request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14" Request.AllowAutoRedirect = False Request.CookieContainer = CookieJar Dim Response As HttpWebResponse = Request.GetResponse() reader = New StreamReader(Response.GetResponseStream()) Return reader.ReadToEnd() Response.Close() End Function Private Sub LogonPage(ByVal URL As String, ByRef CookieJar As CookieContainer, ByVal PostData As String) '访问URL获取Cookie Dim reader As StreamReader Dim Request As HttpWebRequest = HttpWebRequest.Create(URL) Request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14" Request.CookieContainer = CookieJar Request.AllowAutoRedirect = False Request.ContentType = "application/x-www-form-urlencoded" PostData = "username=isiria&password=ceciestunmdp" Request.Method = "POST" Request.ContentLength = PostData.Length Dim requestStream As Stream = Request.GetRequestStream() Dim postBytes As Byte() = Encoding.ASCII.GetBytes(PostData) requestStream.Write(postBytes, 0, postBytes.Length) requestStream.Close() Dim Response As HttpWebResponse = Request.GetResponse() For Each tempCookie In Response.Cookies CookieJar.Add(tempCookie) Next reader = New StreamReader(Response.GetResponseStream()) Response.Close() End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim CookieJar As New CookieContainer Dim PostData As String Try 'Logon PostData = "username=admin&password=password" LogonPage(ConnectURL, CookieJar, PostData) 'Homepage RichTextBox1.AppendText(RegularPage(HomeURL, CookieJar)) Catch ex As Exception MessageBox.Show(ex.Message.ToString) End Try End Sub End Class |
至于GB2132网页乱码问题可以这样解决：
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reader = New StreamReader(Response.GetResponseStream()) |
改成：
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reader = New StreamReader(Response.GetResponseStream(), Encoding.GetEncoding("GB2312")) |
如果要输出到文件，请使用Unicode编码！
RainEggplant原创文章，转载请注明来自：VB.net:Post登陆获取Cookie访问指定页面代码
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