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(VB.NET) Xero API through an HTTP ProxyThis example demonstrates connecting through an HTTP proxy w/ 2-legged OAuth for a Xero private application. This example requires Chilkat v9.5.0.64 or later
' 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. Dim rest As New Chilkat.Rest ' Connect to the Xero server through an HTTP proxy, and then tell the REST object ' to use the socket connection. Dim socket As New Chilkat.Socket ' Set the HTTP proxy domain or IP address, and port. socket.HttpProxyHostname = "192.168.1.100" socket.HttpProxyPort = 8088 ' Connect through the HTTP proxy.. Dim bTls As Boolean = True Dim port As Integer = 443 Dim maxWaitMs As Integer = 5000 Dim success As Boolean = socket.Connect("api.xero.com",port,bTls,maxWaitMs) If (success <> True) Then Debug.WriteLine("Connect Failure Error Code: " & socket.ConnectFailReason) Debug.WriteLine(socket.LastErrorText) Exit Sub End If ' Use the HTTP proxied TLS connection: success = rest.UseConnection(socket,True) If (success <> True) Then Debug.WriteLine(rest.LastErrorText) Exit Sub 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.. Dim consumerKey As String = "XERO_PRIVATE_APP_KEY" Dim consumerSecret As String = "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 Debug.WriteLine(pfx.LastErrorText) Exit Sub End If Dim privKeyFromPfx As Chilkat.PrivateKey = pfx.GetPrivateKey(0) If (pfx.LastMethodSuccess <> True) Then Debug.WriteLine(pfx.LastErrorText) Exit Sub 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 Debug.WriteLine(privKeyFromPem.LastErrorText) Exit Sub 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" oauth1.SetRsaKey(privKeyFromPfx) ' Install the OAuth1 authenticator. rest.SetAuthOAuth1(oauth1,False) Debug.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. Dim sbXml As New Chilkat.StringBuilder success = rest.FullRequestNoBodySb("GET","/api.xro/2.0/Contacts",sbXml) If (success <> True) Then Debug.WriteLine(rest.LastErrorText) Exit Sub End If ' A 200 response is expected for actual success. If (rest.ResponseStatusCode <> 200) Then Debug.WriteLine(sbXml.GetAsString()) Exit Sub End If ' Iterate over the contacts.. Dim bAutoTrim As Boolean = False Dim xml As New Chilkat.Xml xml.LoadSb(sbXml,bAutoTrim) xml.SaveXml("qa_cache/xero_contacts.xml") ' How many records exist? Dim recordCount As Integer = xml.NumChildrenAt("Contacts") Debug.WriteLine("numRecords = " & recordCount) Dim i As Integer = 0 While i < recordCount xml.I = i Debug.WriteLine("ContactID: " & xml.GetChildContent("Contacts|Contact[i]|ContactID")) i = i + 1 End While |
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