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(Ruby) Xero API through an HTTP Proxy

This 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

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Ruby Library for Linux and MAC OS X

require 'chilkat'

# 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.
rest = Chilkat::CkRest.new()

# Connect to the Xero server through an HTTP proxy, and then tell the REST object
# to use the socket connection.
socket = Chilkat::CkSocket.new()

# Set the HTTP proxy domain or IP address, and port.
socket.put_HttpProxyHostname("192.168.1.100")
socket.put_HttpProxyPort(8088)

# Connect through the HTTP proxy..
bTls = true
port = 443
maxWaitMs = 5000
success = socket.Connect("api.xero.com",port,bTls,maxWaitMs)
if (success != true)
    print "Connect Failure Error Code: " + socket.get_ConnectFailReason().to_s() + "\n";
    print socket.lastErrorText() + "\n";
    exit
end

# Use the HTTP proxied TLS connection:
success = rest.UseConnection(socket,true)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

# 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.
pfx = Chilkat::CkPfx.new()
success = pfx.LoadPfxFile("qa_data/certs/xero_private_app/public_privatekey.pfx","PFX_PASSWORD")
if (success != true)
    print pfx.lastErrorText() + "\n";
    exit
end

# privKeyFromPfx is a CkPrivateKey
privKeyFromPfx = pfx.GetPrivateKey(0)
if (pfx.get_LastMethodSuccess() != true)
    print pfx.lastErrorText() + "\n";
    exit
end

# Or we can load from a PEM..
privKeyFromPem = Chilkat::CkPrivateKey.new()
success = privKeyFromPem.LoadPemFile("qa_data/certs/xero_private_app/privatekey.pem")
if (success != true)
    print privKeyFromPem.lastErrorText() + "\n";
    exit
end

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

oauth1 = Chilkat::CkOAuth1.new()
oauth1.put_ConsumerKey(consumerKey)
oauth1.put_ConsumerSecret(consumerSecret)
oauth1.put_Token(consumerKey)
oauth1.put_TokenSecret(consumerSecret)
oauth1.put_SignatureMethod("RSA-SHA1")
oauth1.SetRsaKey(privKeyFromPfx)

# Install the OAuth1 authenticator.
rest.SetAuthOAuth1(oauth1,false)

print "OK, the Xero OAuth1 is initialized and the REST object is ready to make REST API calls.." + "\n";

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

# Get the full list of contacts.
sbXml = Chilkat::CkStringBuilder.new()
success = rest.FullRequestNoBodySb("GET","/api.xro/2.0/Contacts",sbXml)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

# A 200 response is expected for actual success.
if (rest.get_ResponseStatusCode() != 200)
    print sbXml.getAsString() + "\n";
    exit
end

# Iterate over the contacts..
bAutoTrim = false
xml = Chilkat::CkXml.new()
xml.LoadSb(sbXml,bAutoTrim)
xml.SaveXml("qa_cache/xero_contacts.xml")

# How many records exist?
recordCount = xml.NumChildrenAt("Contacts")
print "numRecords = " + recordCount.to_s() + "\n";

i = 0
while i < recordCount
    xml.put_I(i)
    print "ContactID: " + xml.getChildContent("Contacts|Contact[i]|ContactID") + "\n";
    i = i + 1
end

 

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