Https: with VB

[Guest]

I'm looking for guidance to show developers information about implementing
https using VB so that an application which needs to transfer files securely
from within a VB client app can do so using https:

I'm aware the capability is available but need some guidance about where to
find the detailed information so I can help a developer learn something they
do not already know how to do.

Any help appreciated.

 

[vbnetdev]

Hi David,

Play with this....

Dim crdential As New System.Net.NetworkCredential("UserName", "Password")
UploadFile("c:\mylocalfolder\mylocalfile.txt",
"https://thewebsite.com/thedirectory/mylocalfile.txt", crdential)

----------------------------------
Friend Function UploadFile(ByVal SourceLocation As String, ByVal
DestinationLocation As String, ByVal Credential As
System.Net.NetworkCredential) As Boolean
Dim Response As String = Nothing, FileSize As Double = 0
Try
UploadFile = False
If SourceLocation.ToString.Trim <> "" And
DestinationLocation.ToString.Trim <> "" Then
'To set Upload settings
Dim UploadRequest As System.Net.HttpWebRequest =
CType(System.Net.WebRequest.Create(New
Uri(DestinationLocation.ToString.Trim)), System.Net.HttpWebRequest)
UploadRequest.Credentials = Credential
UploadRequest.Timeout = 60000000
UploadRequest.Method = "PUT"
UploadRequest.ContentLength = New
System.IO.FileInfo(SourceLocation.ToString.Trim).Length
FileSize = UploadRequest.ContentLength.ToString.Trim


'To set Upload Stream settings
Dim SourceStream As New
System.IO.FileStream(SourceLocation.ToString.Trim, System.IO.FileMode.Open,
System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite)
Dim RequestStream As System.IO.Stream =
UploadRequest.GetRequestStream()
Dim Buffer(4095) As Byte
Dim Position As Integer = 0, ivlLoop As Integer = 0,
CurLocation As Integer = 0
Position = SourceStream.Read(Buffer, 0, Buffer.Length)

While Position <> 0
RequestStream.Write(Buffer, 0, Position)
Position = SourceStream.Read(Buffer, 0, Buffer.Length)
CurLocation += Position
End While

'To upload Stream on Remote system
Dim WebResponse As System.Net.HttpWebResponse =
CType(UploadRequest.GetResponse(), System.Net.HttpWebResponse)
Dim ResponseReader As New
System.IO.StreamReader(WebResponse.GetResponseStream())
Response = ResponseReader.ReadToEnd()
UploadFile = True

RequestStream.Close()
UploadRequest = Nothing
SourceStream = Nothing
RequestStream = Nothing
WebResponse = Nothing
ResponseReader = Nothing
ElseIf SourceLocation.ToString.Trim = "" Then
Call MsgBox("Source Location is missing")
ElseIf DestinationLocation.ToString.Trim = "" Then
Call MsgBox("Destination Location is missing")
End If
Catch ex As Exception
Call MsgBox(ex.ToString)
End Try
End Function

 

[Guest]

Hi. Thanks for this response.

I presume with just a little effort we could reverse the direction of this
example and have this work for downloading a file TO a client with this
function in the client-side app? (The PUT becomes a GET, etc?).

Again, trying to provide guidance to the developers for them to work this out.

 

[vbnetdev]

Are you asking me to come up with a sample to do this? I don't imagine it
would be difficult. The reason I gave you what I did was if you are trying
to get your developers a starting point this should do it.

If you are asking for someone to build it for them you need to email me off
list ([email protected] (remove no spam)) to discuss this
situation further.