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(PowerShell) Xero API through an SOCKS Proxy

This example demonstrates connecting through a SOCKS proxy w/ 2-legged OAuth for a Xero private application.

This example requires Chilkat v9.5.0.64 or later

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Chilkat for Mono

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet47.dll")

# 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 = New-Object Chilkat.Rest

# Connect to the Xero server through an HTTP proxy, and then tell the REST object
# to use the socket connection.
$socket = New-Object Chilkat.Socket

# Set the SOCKS proxy domain or IP address, port, and SOCKS version number (4 or 5)
$socket.SocksHostname = "192.168.1.100"
$socket.SocksPort = 1080
$socket.SocksVersion = 5
# Other properties exist for specifying a SOCKS proxy login and password,
# but these are not used in this example.

# Connect through the SOCKS proxy..
$bTls = $true
$port = 443
$maxWaitMs = 5000
$success = $socket.Connect("api.xero.com",$port,$bTls,$maxWaitMs)
if ($success -ne $true) {
    $("Connect Failure Error Code: " + $socket.ConnectFailReason)
    $($socket.LastErrorText)
    exit
}

# Use the SOCKS proxied TLS connection:
$success = $rest.UseConnection($socket,$true)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

# 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 = New-Object Chilkat.Pfx
$success = $pfx.LoadPfxFile("qa_data/certs/xero_private_app/public_privatekey.pfx","PFX_PASSWORD")
if ($success -ne $true) {
    $($pfx.LastErrorText)
    exit
}

$privKeyFromPfx = $pfx.GetPrivateKey(0)
if ($pfx.LastMethodSuccess -ne $true) {
    $($pfx.LastErrorText)
    exit
}

# Or we can load from a PEM..
$privKeyFromPem = New-Object Chilkat.PrivateKey
$success = $privKeyFromPem.LoadPemFile("qa_data/certs/xero_private_app/privatekey.pem")
if ($success -ne $true) {
    $($privKeyFromPem.LastErrorText)
    exit
}

# 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 = New-Object 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)

$("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.
$sbXml = New-Object Chilkat.StringBuilder
$success = $rest.FullRequestNoBodySb("GET","/api.xro/2.0/Contacts",$sbXml)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

# A 200 response is expected for actual success.
if ($rest.ResponseStatusCode -ne 200) {
    $($sbXml.GetAsString())
    exit
}

# Iterate over the contacts..
$bAutoTrim = $false
$xml = New-Object Chilkat.Xml
$xml.LoadSb($sbXml,$bAutoTrim)
$xml.SaveXml("qa_cache/xero_contacts.xml")

# How many records exist?
$recordCount = $xml.NumChildrenAt("Contacts")
$("numRecords = " + $recordCount)

$i = 0
while ($i -lt $recordCount) {
    $xml.I = $i
    $("ContactID: " + $xml.GetChildContent("Contacts|Contact[i]|ContactID"))
    $i = $i + 1
}


 

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