如何解决如何使用HttpWebRequest获取元标记值?
我使用VB.Net WEB API。我想通过使用HttpWebRequest获得WebPage中meta标记的值。如何? 控制器:
<HttpPost>
<Route("api/sWeb/Query")>
Public Function Query(ByVal url As String) As Object
Dim request As System.Net.HttpWebRequest = CType(System.Net.WebRequest.CreateHttp(url),System.Net.HttpWebRequest)
Dim response As System.Net.HttpWebResponse = CType((request.GetResponse()),System.Net.HttpWebResponse)
Dim dataStream = response.GetResponseStream()
Dim reader As System.IO.StreamReader = New System.IO.StreamReader(dataStream)
Dim responseFromServer As String = reader.ReadToEnd()
......
Return
End Function
网页演示:
<meta property="og:title" content="AAAAAAAA">
<meta property="og:url" content="BBBBBBBB">
<meta property="og:description" content="CCCCCCCCCC">
<meta property="og:image" content="DDDDDDDDDDD">
<meta property="og:image:width" content="111111">
<meta property="og:image:height" content="2222222">
我想使用元标记'og:image'的属性通过HttpWebRequest查找内容值'DDDDDDDDDDDDD'。
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