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(C# UWP/WinRT) 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

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

//  This example requires Chilkat v9.5.0.64 or later

Chilkat.Socket tunnel = new Chilkat.Socket();

string sshHostname = "www.my-ssh-server.com";
int sshPort = 22;

//  Connect to an SSH server and establish the SSH tunnel:
bool success = await tunnel.SshOpenTunnelAsync(sshHostname,sshPort);
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//  Authenticate with the SSH server via a login/password
//  or with a public key.
//  This example demonstrates SSH password authentication.
success = await tunnel.SshAuthenticatePwAsync("mySshLogin","mySshPassword");
if (success != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//   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.
Chilkat.Rest rest = new Chilkat.Rest();
Chilkat.Socket channel = null;

bool bTls = true;
int port = 443;
int maxWaitMs = 7000;

//  This returns a socket object that is a single channel within the SSH tunnel.
channel = await tunnel.SshOpenChannelAsync("api.xero.com",port,bTls,maxWaitMs);
if (tunnel.LastMethodSuccess != true) {
    Debug.WriteLine(tunnel.LastErrorText);
    return;
}

//  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) {
    Debug.WriteLine(rest.LastErrorText);

    return;
}

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

string consumerKey = "XERO_PRIVATE_APP_KEY";
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.
Chilkat.Pfx pfx = new Chilkat.Pfx();
success = pfx.LoadPfxFile("qa_data/certs/xero_private_app/public_privatekey.pfx","PFX_PASSWORD");
if (success != true) {
    Debug.WriteLine(pfx.LastErrorText);
    return;
}

Chilkat.PrivateKey privKeyFromPfx = pfx.GetPrivateKey(0);
if (pfx.LastMethodSuccess != true) {
    Debug.WriteLine(pfx.LastErrorText);
    return;
}

//  Or we can load from a PEM..
Chilkat.PrivateKey privKeyFromPem = new Chilkat.PrivateKey();
success = privKeyFromPem.LoadPemFile("qa_data/certs/xero_private_app/privatekey.pem");
if (success != true) {
    Debug.WriteLine(privKeyFromPem.LastErrorText);
    return;
}

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

Chilkat.OAuth1 oauth1 = 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.
Chilkat.StringBuilder sbXml = new Chilkat.StringBuilder();
success = await rest.FullRequestNoBodySbAsync("GET","/api.xro/2.0/Contacts",sbXml);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

//  A 200 response is expected for actual success.
if (rest.ResponseStatusCode != 200) {
    Debug.WriteLine(sbXml.GetAsString());
    return;
}

//  Iterate over the contacts..
bool bAutoTrim = false;
Chilkat.Xml xml = new Chilkat.Xml();
xml.LoadSb(sbXml,bAutoTrim);
xml.SaveXml("qa_cache/xero_contacts.xml");

//  How many records exist?
int recordCount = xml.NumChildrenAt("Contacts");
Debug.WriteLine("numRecords = " + Convert.ToString(recordCount));

int i = 0;
while (i < recordCount) {
    xml.I = i;
    Debug.WriteLine("ContactID: " + xml.GetChildContent("Contacts|Contact[i]|ContactID"));
    i = i + 1;
}


 

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