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(Xojo Plugin) Xero API through an SSH Tunnel

This example demonstrates connecting through an SSH Tunnel w/ 2-legged OAuth for a Xero private application.

This example requires Chilkat v9.5.0.64 or later

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Xojo Plugin for Windows, Linux, Mac OS X, and ARM

// This example requires Chilkat v9.5.0.64 or later

Dim tunnel As New Chilkat.Socket

Dim sshHostname As String
sshHostname = "www.my-ssh-server.com"
Dim sshPort As Int32
sshPort = 22

// Connect to an SSH server and establish the SSH tunnel:
Dim success As Boolean
success = tunnel.SshOpenTunnel(sshHostname,sshPort)
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Authenticate with the SSH server via a login/password
// or with a public key.
// This example demonstrates SSH password authentication.
success = tunnel.SshAuthenticatePw("mySshLogin","mySshPassword")
If (success <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

//  OK, the SSH tunnel is setup.  Now open a channel within the tunnel.
//  (Any number of channels may be created from the same SSH tunnel.
//  Multiple channels may coexist at the same time.)

// 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.
Dim rest As New Chilkat.Rest
Dim channel As Chilkat.Socket

Dim bTls As Boolean
bTls = True
Dim port As Int32
port = 443
Dim maxWaitMs As Int32
maxWaitMs = 7000

// This returns a socket object that is a single channel within the SSH tunnel.
channel = tunnel.SshOpenChannel("api.xero.com",port,bTls,maxWaitMs)
If (tunnel.LastMethodSuccess <> True) Then
    System.DebugLog(tunnel.LastErrorText)
    Return
End If

// Use the connection.  (This connection is a TLS running on an SSH channel through an SSH tunnel.
// In other words, TLS is wrapped within the SSH tunnel.)
success = rest.UseConnection(channel,True)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)

    Return
End If

// OK, we're connected.  
// -----------------------------------------------------------------
// Now setup the OAuth1 authenticator..

Dim consumerKey As String
consumerKey = "XERO_PRIVATE_APP_KEY"
Dim consumerSecret As String
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.
Dim pfx As New Chilkat.Pfx
success = pfx.LoadPfxFile("qa_data/certs/xero_private_app/public_privatekey.pfx","PFX_PASSWORD")
If (success <> True) Then
    System.DebugLog(pfx.LastErrorText)
    Return
End If

Dim privKeyFromPfx As Chilkat.PrivateKey
privKeyFromPfx = pfx.GetPrivateKey(0)
If (pfx.LastMethodSuccess <> True) Then
    System.DebugLog(pfx.LastErrorText)
    Return
End If

// Or we can load from a PEM..
Dim privKeyFromPem As New Chilkat.PrivateKey
success = privKeyFromPem.LoadPemFile("qa_data/certs/xero_private_app/privatekey.pem")
If (success <> True) Then
    System.DebugLog(privKeyFromPem.LastErrorText)
    Return
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).

Dim oauth1 As New Chilkat.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,False)

System.DebugLog("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.
Dim sbXml As New Chilkat.StringBuilder
success = rest.FullRequestNoBodySb("GET","/api.xro/2.0/Contacts",sbXml)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// A 200 response is expected for actual success.
If (rest.ResponseStatusCode <> 200) Then
    System.DebugLog(sbXml.GetAsString())
    Return
End If

// Iterate over the contacts..
Dim bAutoTrim As Boolean
bAutoTrim = False
Dim xml As New Chilkat.Xml
success = xml.LoadSb(sbXml,bAutoTrim)
success = xml.SaveXml("qa_cache/xero_contacts.xml")

// How many records exist?
Dim recordCount As Int32
recordCount = xml.NumChildrenAt("Contacts")
System.DebugLog("numRecords = " + Str(recordCount))

Dim i As Int32
i = 0
While i < recordCount
    xml.I = i
    System.DebugLog("ContactID: " + xml.GetChildContent("Contacts|Contact[i]|ContactID"))
    i = i + 1
Wend

 

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