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(Objective-C) Xero API through an SSH TunnelThis 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
#import <CkoSocket.h> #import <NSString.h> #import <CkoRest.h> #import <CkoPfx.h> #import <CkoPrivateKey.h> #import <CkoOAuth1.h> #import <CkoStringBuilder.h> #import <CkoXml.h> // This example requires Chilkat v9.5.0.64 or later CkoSocket *tunnel = [[CkoSocket alloc] init]; NSString *sshHostname = @"sftp.example.com"; int sshPort = 22; // Connect to an SSH server and establish the SSH tunnel: BOOL success = [tunnel SshOpenTunnel: sshHostname sshPort: [NSNumber numberWithInt: sshPort]]; if (success != YES) { NSLog(@"%@",tunnel.LastErrorText); return; } // Authenticate with the SSH server via a login/password // or with a public key. // This example demonstrates SSH password authentication. success = [tunnel SshAuthenticatePw: @"mySshLogin" sshPassword: @"mySshPassword"]; if (success != YES) { NSLog(@"%@",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. CkoRest *rest = [[CkoRest alloc] init]; CkoSocket *channel = 0; BOOL bTls = YES; int port = 443; int maxWaitMs = 7000; // This returns a socket object that is a single channel within the SSH tunnel. channel = [tunnel SshOpenChannel: @"api.xero.com" port: [NSNumber numberWithInt: port] ssl: bTls maxWaitMs: [NSNumber numberWithInt: maxWaitMs]]; if (tunnel.LastMethodSuccess != YES) { NSLog(@"%@",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 autoReconnect: YES]; if (success != YES) { NSLog(@"%@",rest.LastErrorText); return; } // OK, we're connected. // ----------------------------------------------------------------- // Now setup the OAuth1 authenticator.. NSString *consumerKey = @"XERO_PRIVATE_APP_KEY"; NSString *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. CkoPfx *pfx = [[CkoPfx alloc] init]; success = [pfx LoadPfxFile: @"qa_data/certs/xero_private_app/public_privatekey.pfx" password: @"PFX_PASSWORD"]; if (success != YES) { NSLog(@"%@",pfx.LastErrorText); return; } CkoPrivateKey *privKeyFromPfx = [pfx GetPrivateKey: [NSNumber numberWithInt: 0]]; if (pfx.LastMethodSuccess != YES) { NSLog(@"%@",pfx.LastErrorText); return; } // Or we can load from a PEM.. CkoPrivateKey *privKeyFromPem = [[CkoPrivateKey alloc] init]; success = [privKeyFromPem LoadPemFile: @"qa_data/certs/xero_private_app/privatekey.pem"]; if (success != YES) { NSLog(@"%@",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). CkoOAuth1 *oauth1 = [[CkoOAuth1 alloc] init]; 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 useQueryParams: NO]; NSLog(@"%@",@"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. CkoStringBuilder *sbXml = [[CkoStringBuilder alloc] init]; success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/api.xro/2.0/Contacts" sb: sbXml]; if (success != YES) { NSLog(@"%@",rest.LastErrorText); return; } // A 200 response is expected for actual success. if ([rest.ResponseStatusCode intValue] != 200) { NSLog(@"%@",[sbXml GetAsString]); return; } // Iterate over the contacts.. BOOL bAutoTrim = NO; CkoXml *xml = [[CkoXml alloc] init]; [xml LoadSb: sbXml autoTrim: bAutoTrim]; [xml SaveXml: @"qa_cache/xero_contacts.xml"]; // How many records exist? int recordCount = [[xml NumChildrenAt: @"Contacts"] intValue]; NSLog(@"%@%d",@"numRecords = ",recordCount); int i = 0; while (i < recordCount) { xml.I = [NSNumber numberWithInt: i]; NSLog(@"%@%@",@"ContactID: ",[xml GetChildContent: @"Contacts|Contact[i]|ContactID"]); i = i + 1; } |
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