(VB.NET) Persist Cookies to XML Files and Auto Re-Send

Demonstrates how to persist incoming cookies to XML files and automatically re-send in subsesquent HTTP requests.

Download: Chilkat .NET Assemblies

Dim http As New Chilkat.Http()

Dim success As Boolean

'  Any string unlocks the component for the 1st 30-days.
success = http.UnlockComponent("Anything for 30-day trial")
If (success <> true) Then
    TextBox1.Text = TextBox1.Text & http.LastErrorText & vbCrLf
    Exit Sub
End If


'  To save cookies to XML files (per domain) in a specific
'  directory, set the CookieDir property (the directory must
'  already exist and be writeable by the caller).  Also,
'  set the SaveCookies property:
http.CookieDir = "/cookieDir"
http.SaveCookies = true

'  Any methods that do a GET, POST, etc. will save cookies
'  to the CookieDir:
Dim html As String
html = http.QuickGetStr("https://www.paypal.com/")

'  After running this code, a "paypal_com.xml" file should appear
'  in /cookieDir.

'  It's content will look something like this:

'  

<cookies>
    <cookie key=".paypal.com,/" v="0" secure="yes">
        <navcmd>_home-general</navcmd>
        <HttpOnly />
        <cwrClyrK4LoCV1fydGbAxiNL6iG>9cz...</cwrClyrK4LoCV1fydGbAxiNL6iG>
    </cookie>
</cookies>



'  To cause cached cookies to be sent with
'  subsequent HTTP requests, set the SendCookies
' property = True.
http.SendCookies = true

'  If another HTTP request is sent, the cookies should
'  be added:
html = http.QuickGetStr("https://www.paypal.com/")

'  Check the LastHeader property to see the MIME header
'  of the last HTTP request sent.
'  The "Cookie" header field should be present.
TextBox1.Text = TextBox1.Text & "--- LastHeader ---" & vbCrLf
TextBox1.Text = TextBox1.Text & http.LastHeader & vbCrLf