如果您“获取”链接的标题:
Status:200
Raw:
HTTP/1.1 200 OK
Cache-Control: public, max-age=9999
Content-Length: 33183
Content-Type: text/csv; charset=utf-8
Content-Encoding: gzip
Expires: Sat, 23 Jul 2016 02:32:58 GMT
Last-Modified: Fri, 22 Jul 2016 23:46:19 GMT
Vary: *
Set-Cookie: ASP.NET_SessionId=vsxyok45zvtgsbvp4iqxdh45; path=/; HttpOnly
X-Powered-By: ASP.NET
Date: Fri, 22 Jul 2016 23:46:19 GMT
Request:
GET /tsev2/chart/data/IndexFinancial.aspx?i=32097828799138957&t=ph HTTP/1.1
您会发现数据是 gzip 压缩的(请参阅“Content-Encoding:”行)。要解决这个问题,请使用以下代码:
Dim myUrl As String = "http://www.tsetmc.com/tsev2/chart/data/IndexFinancial.aspx?i=32097828799138957&t=ph"
Dim result as string
Using client As New WebClient
client.Headers(HttpRequestHeader.AcceptEncoding) = "gzip"
Using rs As New GZipStream(client.OpenRead(myUrl), CompressionMode.Decompress)
result = New StreamReader(rs).ReadToEnd()
End Using
End Using
结果是未压缩的文本,正如您已指示为正确的数字集:
20081206,9249,9168,9249,9178,8539624,9178;20081207,9178,9130,9178,9130,11752353,9130;
这是我找到解压缩 gzip 的信息的地方(那里有更多信息):
通过 WebClient.DownloadData 自动解压 gzip 响应
注意:您可能需要在项目中为“System.IO.Compression”添加引用