Docusign REST call from CodeIgniter - php

Question

I'm trying to call the DocuSign REST login information within a CodeIgniter application. The Docusign sample code shows:
// Input your info here:
$integratorKey = '...';
$email = '...#....com';
$password = '...';
$name = 'John Doe';
// construct the authentication header:
$header = "<DocuSignCredentials><Username>" . $email . "</Username><Password>" . $password . "</Password><IntegratorKey>" . $integratorKey . "</IntegratorKey></DocuSignCredentials>";
/////////////////////////////////////////////////////////////////////////////////////////////////
// STEP 1 - Login (to retrieve baseUrl and accountId)
/////////////////////////////////////////////////////////////////////////////////////////////////
$url = "https://demo.docusign.net/restapi/v2/login_information";
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array("X-DocuSign-Authentication: $header"));
$json_response = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ( $status != 200 ) {
echo "error calling webservice, status is:" . $status;
exit(-1);
}
I keep getting a status response of 0. When I echo out the curl all the xml tags have been converted to lowercase (which won't work with Docusign). Has anyone done this call within CodeIgniter? How did you accomplish it? I know my credentials are good because I can do a command line curl and get a response.

Answer 1

I'm not sure what CodeIgniter is doing and why the tags would be converted to lower case but you're right in that DocuSign expects xml tags to begin with a capital letter so that might not work. What you can do, though, is use JSON headers and request bodies instead.
For instance, instead of an XML formatted authentication header like
<DocuSignCredentials>
<Username>username</Username>
<Password>password</Password>
<IntegratorKey>integrator_key</IntegratorKey>
</DocuSignCredentials>
You could use the corresponding JSON auth header like
{
"Username": "username",
"Password": "password",
"IntegratorKey": "integrator_key"
}
The "nodes" still start with a capital but since it's not xml I'm wondering if CodeIgniter maybe leaves it alone. Examples of this can be found at the DocuSign Developer Center on this page.