Question

我正在尝试访问我需要登录网站并传递参数列表的页面。我似乎能够登录到该站点（如果我更改登录详细信息，我得到401未经授权的错误），但后来我收到400错误的请求错误。代码有点哈希，所以我知道有些不对劲但不知道在哪里。

编辑代码

        Public Sub TestConn()


    Dim customeremailaddress As String = HttpUtility.UrlEncode("r.test@test.com")
    Dim customername As String = HttpUtility.UrlEncode("Ryan")
    Dim referenceid As String = HttpUtility.UrlEncode("ordertest123")
    Dim languagecode As String = HttpUtility.UrlEncode("1043")
    Dim expirydays As String = HttpUtility.UrlEncode("30")

    Dim UserName As String = "testusername"
    Dim password As String = "testpassword"
    Dim siteCredentials As New NetworkCredential(UserName, password)

    Dim URLAuth As String = "http://service.someurl.com/process.xml"
    Dim postString As String = String.Format("customeremailaddress={0}&customername={1}&referenceid={2}&languagecode={3}&expirydays={4}", customeremailaddress, customername, referenceid, languagecode, expirydays)

    Dim postBytes As Byte() = Encoding.UTF8.GetBytes(postString)

    Const contentType As String = "application/x-www-form-urlencoded"
    System.Net.ServicePointManager.Expect100Continue = False

    Dim cookies As New CookieContainer()
    Dim webRequest__1 As HttpWebRequest = TryCast(WebRequest.Create(URLAuth), HttpWebRequest)
    webRequest__1.Method = "POST"
    webRequest__1.ContentType = contentType
    webRequest__1.CookieContainer = cookies
    webRequest__1.ContentLength = postBytes.Length
    webRequest__1.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1"
    webRequest__1.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
    webRequest__1.Referer = "http://service.someurl.com/process.xml"
    webRequest__1.Credentials = siteCredentials

    Try
        Dim requestStream As Stream = webRequest__1.GetRequestStream()
        requestStream.Write(postBytes, 0, postBytes.Length)
        Dim responseReader As New StreamReader(webRequest__1.GetResponse().GetResponseStream())
        Dim responseData As String = responseReader.ReadToEnd()
        responseReader.Close()
        webRequest__1.GetResponse().Close()

    Catch ex As Exception
        Lbl_ConnTest_error.Text = ex.Message
    End Try

End Sub

Answer 1

您需要发送postString的字节而不是字符串本身：

Dim postBytes As Byte() = Encoding.UTF8.GetBytes(postString)
...
webRequest__1.ContentLength = postBytes.Length
...
Dim requestStream As Stream = webRequest__1.GetRequestStream()
requestStream.Write(postBytes, 0, postBytes.Length)

更多信息here。

使用ASP.net将参数传递给外部网站

1 个答案: