I wrote a little function for Visual Basic.Net to accomplish this, and found it so darn handy that I thought I would post it here for you. Here it is:
Public Function GetFileSize(ByVal url As String) As Long
Dim request As System.Net.HttpWebRequest
Dim response As System.Net.HttpWebResponse
Dim fileSize As Long
request = System.Net.WebRequest.Create(url)
response = request.GetResponse()
fileSize = response.ContentLength
Catch ex As Exception
Some related properties that you can get from an HttpWebResponse object are:
- CharacterSet - Gets the character set of the response.
- ContentEncoding - Gets the method used to encode the body of the response.
- ContentType - Gets the content type of the response.
- Cookies - Gets or set cookies associated with the response.
- LastModified - Gets the last date and time the contents of the response was modified.
- Method - Gets the method used to return the response.
- ProtocolVersion - Gets the version of the HTTP protocol used in the response.
- Server - Gets the name of the server that sent the response.
All of the above information can be extracted from the response without actually having to pull down the entire file.