Question

我正在使用.net中的webclient类，我去了一个网站。

Dim oWebClient As New WebClient()
Dim oDownloadedPage As String = oWebClient.DownloadString(<site>)

经过一番搜索后发现我尝试下载的网站必须禁用TLS1.0

所以我将ServicePointManger更改为此

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 Or 
   SecurityProtocolType.Tls12 Or SecurityProtocolType.Tls11 Or SecurityProtocolType.Tls

我得到了同样的错误..所以我决定把它改成这个..

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 Or 
   SecurityProtocolType.Tls Or SecurityProtocolType.Tls11 Or SecurityProtocolType.Tls12

看看我在那里做了什么？我切换了订单，然后它工作了。

有人可以向我解释一下订购的不同之处是什么？为什么这很重要？我想知道我是否会去下载一个TLS 1.0网站，如果它会失败。

Answer 1

System.Net.ServicePointManager.SecurityProtocol = DirectCast(3072, System.Net.SecurityProtocolType) 'TLS 1.2
Dim inStream As StreamReader
Dim webRequest As WebRequest
Dim webresponse As WebResponse
Dim cResult As String = ""
dim cURL as String="https://your.page.com"
webRequest = WebRequest.Create(cURL)
webresponse = webRequest.GetResponse()
inStream = New StreamReader(webresponse.GetResponseStream())
cResult = inStream.ReadToEnd()

这对我有效！

.NET和ServicePointManager.SecurityProtocol

1 个答案: