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(VBScript) Xero API through an SOCKS Proxy

This example demonstrates connecting through a SOCKS proxy w/ 2-legged OAuth for a Xero private application.

This example requires Chilkat v9.5.0.64 or later

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

'  This example requires Chilkat v9.5.0.64 or later

'  This sample code would typically be placed in a subroutine or function
'  where the rest object is passed by reference.
'  It does the OAuth1 setup and makes the initial connection.
set rest = CreateObject("Chilkat_9_5_0.Rest")

'  Connect to the Xero server through an HTTP proxy, and then tell the REST object
'  to use the socket connection.
set socket = CreateObject("Chilkat_9_5_0.Socket")

'  Set the SOCKS proxy domain or IP address, port, and SOCKS version number (4 or 5)
socket.SocksHostname = "192.168.1.100"
socket.SocksPort = 1080
socket.SocksVersion = 5
'  Other properties exist for specifying a SOCKS proxy login and password,
'  but these are not used in this example.

'  Connect through the SOCKS proxy..
bTls = 1
port = 443
maxWaitMs = 5000
success = socket.Connect("api.xero.com",port,bTls,maxWaitMs)
If (success <> 1) Then
    outFile.WriteLine("Connect Failure Error Code: " & socket.ConnectFailReason)
    outFile.WriteLine(socket.LastErrorText)
    WScript.Quit
End If

'  Use the SOCKS proxied TLS connection:
success = rest.UseConnection(socket,1)
If (success <> 1) Then
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

'  OK, we're connected.
'  The UseConnection method has an internal reference to the underlying/internal socket.
'  The application can does not need to keep its socket object in existence.
'  -----------------------------------------------------------------
'  Now setup the OAuth1 authenticator..

consumerKey = "XERO_PRIVATE_APP_KEY"
consumerSecret = "XERO_PRIVATE_APP_SECRET"

'  Let's get our private key from our PFX (password protected), or the PEM (unprotected).
'  You can decide which to use.  Either is OK, although I would recommend keeping your
'  private keys in a PFX and not in an unprotected PEM.
set pfx = CreateObject("Chilkat_9_5_0.Pfx")
success = pfx.LoadPfxFile("qa_data/certs/xero_private_app/public_privatekey.pfx","PFX_PASSWORD")
If (success <> 1) Then
    outFile.WriteLine(pfx.LastErrorText)
    WScript.Quit
End If

' privKeyFromPfx is a Chilkat_9_5_0.PrivateKey
Set privKeyFromPfx = pfx.GetPrivateKey(0)
If (pfx.LastMethodSuccess <> 1) Then
    outFile.WriteLine(pfx.LastErrorText)
    WScript.Quit
End If

'  Or we can load from a PEM..
set privKeyFromPem = CreateObject("Chilkat_9_5_0.PrivateKey")
success = privKeyFromPem.LoadPemFile("qa_data/certs/xero_private_app/privatekey.pem")
If (success <> 1) Then
    outFile.WriteLine(privKeyFromPem.LastErrorText)
    WScript.Quit
End If

'  Note: There are many other means for loading a private key, including
'  from other formats and directly from memory (i.e. not file-based).

set oauth1 = CreateObject("Chilkat_9_5_0.OAuth1")
oauth1.ConsumerKey = consumerKey
oauth1.ConsumerSecret = consumerSecret
oauth1.Token = consumerKey
oauth1.TokenSecret = consumerSecret
oauth1.SignatureMethod = "RSA-SHA1"
success = oauth1.SetRsaKey(privKeyFromPfx)

'  Install the OAuth1 authenticator.
success = rest.SetAuthOAuth1(oauth1,0)

outFile.WriteLine("OK, the Xero OAuth1 is initialized and the REST object is ready to make REST API calls..")

'  -----------------------------------------------------------------
'  Make a call to verify that OAuth1 through an HTTP proxy works..

'  Get the full list of contacts.
set sbXml = CreateObject("Chilkat_9_5_0.StringBuilder")
success = rest.FullRequestNoBodySb("GET","/api.xro/2.0/Contacts",sbXml)
If (success <> 1) Then
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

'  A 200 response is expected for actual success.
If (rest.ResponseStatusCode <> 200) Then
    outFile.WriteLine(sbXml.GetAsString())
    WScript.Quit
End If

'  Iterate over the contacts..
bAutoTrim = 0
set xml = CreateObject("Chilkat_9_5_0.Xml")
success = xml.LoadSb(sbXml,bAutoTrim)
success = xml.SaveXml("qa_cache/xero_contacts.xml")

'  How many records exist?
recordCount = xml.NumChildrenAt("Contacts")
outFile.WriteLine("numRecords = " & recordCount)

i = 0
Do While i < recordCount
    xml.I = i
    outFile.WriteLine("ContactID: " & xml.GetChildContent("Contacts|Contact[i]|ContactID"))
    i = i + 1
Loop

outFile.Close

 

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