Plesk api String could not be parsed as XML - php

Question

I want to use the Plesk Api for PHP. I download a sample from the Parallels website and tried to use it for my website. When I open the page on my website I get the following error:
Fatal error: Uncaught exception 'Exception' with message 'String could not be parsed as XML
The code I use:
<?php
error_reporting(E_ALL);
ini_set("display_errors", 1);
/**
* Reports error during API RPC request
*/
class ApiRequestException extends Exception {}
/**
* Returns DOM object representing request for information about all available domains
* #return DOMDocument
*/
function domainsInfoRequest()
{
$xmldoc = new DomDocument('1.0', 'UTF-8');
$xmldoc->formatOutput = true;
// <packet>
$packet = $xmldoc->createElement('packet');
$packet->setAttribute('version', '1.4.1.2');
$xmldoc->appendChild($packet);
// <packet/domain>
$domain = $xmldoc->createElement('domain');
$packet->appendChild($domain);
// <packet/domain/get>
$get = $xmldoc->createElement('get');
$domain->appendChild($get);
// <packet/domain/get/filter>
$filter = $xmldoc->createElement('filter');
$get->appendChild($filter);
// <packet/domain/get/dataset>
$dataset = $xmldoc->createElement('dataset');
$get->appendChild($dataset);
// dataset elements
$dataset->appendChild($xmldoc->createElement('limits'));
$dataset->appendChild($xmldoc->createElement('prefs'));
$dataset->appendChild($xmldoc->createElement('user'));
$dataset->appendChild($xmldoc->createElement('hosting'));
$dataset->appendChild($xmldoc->createElement('stat'));
$dataset->appendChild($xmldoc->createElement('gen_info'));
return $xmldoc;
}
/**
* Prepares CURL to perform Plesk API request
* #return resource
*/
function curlInit($host, $login, $password)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "https://{$host}:8443/enterprise/control/agent.php");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_HTTPHEADER,
array("HTTP_AUTH_LOGIN: {$login}",
"HTTP_AUTH_PASSWD: {$password}",
"HTTP_PRETTY_PRINT: TRUE",
"Content-Type: text/xml")
);
return $curl;
}
/**
* Performs a Plesk API request, returns raw API response text
*
* #return string
* #throws ApiRequestException
*/
function sendRequest($curl, $packet)
{
curl_setopt($curl, CURLOPT_POSTFIELDS, $packet);
$result = curl_exec($curl);
if (curl_errno($curl)) {
$errmsg = curl_error($curl);
$errcode = curl_errno($curl);
curl_close($curl);
throw new ApiRequestException($errmsg, $errcode);
}
curl_close($curl);
return $result;
}
/**
* Looks if API responded with correct data
*
* #return SimpleXMLElement
* #throws ApiRequestException
*/
function parseResponse($response_string)
{
$xml = new SimpleXMLElement($response_string);
if (!is_a($xml, 'SimpleXMLElement'))
throw new ApiRequestException("Can not parse server response: {$response_string}");
return $xml;
}
/**
* Check data in API response
* #return void
* #throws ApiRequestException
*/
function checkResponse(SimpleXMLElement $response)
{
$resultNode = $response->domain->get->result;
// check if request was successful
if ('error' == (string)$resultNode->status)
throw new ApiRequestException("Plesk API returned error: " . (string)$resultNode->result->errtext);
}
//
// int main()
//
$host = '************';
$login = '************';
$password = '************';
$curl = curlInit($host, $login, $password);
try {
$response = sendRequest($curl, domainsInfoRequest()->saveXML());
$responseXml = parseResponse($response);
checkResponse($responseXml);
} catch (ApiRequestException $e) {
echo $e;
die();
}
// Explore the result
foreach ($responseXml->xpath('/packet/domain/get/result') as $resultNode) {
echo "Domain id: " . (string)$resultNode->id . " ";
echo (string)$resultNode->data->gen_info->name . " (" . (string)$resultNode->data->gen_info->dns_ip_address . ")\n";
}
?>
I hope someone can help me to find a solution.

Answer 1

Your script works perfectly with my server (as much as I was able to restore the formatting).
It seems based on the example provided in original Parallels documentation. So I have grabbed an example from `Plesk integration guide and applied to my server - it works as well.
I could assume some misconfiguration of your Plesk server. Perhaps you could troubleshoot it if your print XML request (domainsInfoRequest()->saveXML()) and XML response ($response). For some reason apparently your $response contains something different from a valid XML code. If not sure, you can copy/paste it into a file and run xmllint (XML validation tool) on it.