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| <?php
//Disable Errors Warning
// error_reporting(0);
Class SteamAPI
{
//- Time out in seconds
public $timeout = 3;
//- API hostname
private $hostname = "steamcommunity.com";
private $socket, $ip_address, $service_port;
/*
-- Function: constructor
-- Purpose: Called when class is created. Used to set some default values.
-- Arguments: none
-- Returns: void
*/
public function __construct()
{
//- Get the IP address for steamcommunity.com
$this->ip_address = gethostbyname($this->hostname);
//- Get the port for the WWW service
$this->service_port = getservbyname('www', 'tcp');
}
/*
-- Function: get_profile_data
-- Purpose: Retrieves profile data from the Steam API for the specified steam ID.
-- Arguments: $steam_id - A steam ID to perform the API call for
-- Returns: An array filled with the profile data, or null if the profile does not exist
*/
public function get_profile_data($steam_id)
{
//- Calculate the 64 bit steam ID
$steam_id64 = $this->get_steamid64($steam_id);
if (!$steam_id64)
{
throw New Exception('Invalid steam ID provided');
}
//- Construct HTTP request
$request = "GET /profiles/" . $steam_id64 . "?xml=1 HTTP/1.1\r\n";
$request .= "Host: " . $this->hostname . "\r\n";
$request .= "Connection: Close\r\n\r\n";
//- Do HTTP request
$this->steam_connect();
$response = $this->steam_request($request);
$this->steam_disconnect();
//- Check if a 302 response is given. This happens if the user has a 'Custom URL' set in their profile.
//- If this is the case, make another request to the custom URL
if (substr($response,0,12) == "HTTP/1.1 302")
{
//- Get the custom URL from the response
if (preg_match( '@Location: http://steamcommunity.com/id/([a-zA-Z0-9_-]+)/@', $response, $location))
{
$custom_url = $location[1];
}
else
{
throw New Exception('Custom URL redirection, but no location found.');
}
//- Construct HTTP request
$request = "GET /id/" . $custom_url . "?xml=1 HTTP/1.1\r\n";
$request .= "Host: " . $this->hostname . "\r\n";
$request .= "Connection: Close\r\n\r\n";
//- Do HTTP request
$this->steam_connect();
$response = $this->steam_request($request);
$this->steam_disconnect();
}
$this->steam_validate($response);
//- If there is no profile XML element, something is not right
if (!preg_match( '@<profile>(.+)</profile>@s', $response, $xmlArray))
{
throw New Exception('Could not parse returned steam community data. XML Root node missing.');
}
//- Store XML without headers
$xml_data = $xmlArray[0];
//- Parse XML. An array of data is returned
$data_array = $this->parse_xml($xml_data);
//- Return the data
return $data_array;
}
/*
-- Function: parse_xml
-- Purpose: Populate an array with the data found in the supplied XML
-- Arguments: $xml_data - The XML data to parse
-- Returns: An array of data from the XML
*/
private function parse_xml($xml_data)
{
//- Create an XMLReader object to parse the XML with
$reader = new XMLReader();
//- Load the XML into it
try {
$reader->XML($xml_data);
}
catch (Exception $e)
{
throw New Exception('Could not parse returned XML: ' . $e->getMessage());
}
//- Initialize an array for the profile data
$data_array = array();
//- Start reading through the XML
while ($reader->read())
{
//- First encounter the root element
if ($reader->nodeType == XMLReader::ELEMENT)
{
$rootnode_name = $reader->name;
//- Read through its subnodes
while ($reader->read())
{
if ($reader->nodeType == XMLReader::ELEMENT)
{
//- Store the name of the subnode
$elementName = $reader->name;
//- Check for sections that will result in a recursive multi dimensional array
if ( $elementName == "friends" || $elementName == "weblinks" ||
$elementName == "groups" || $elementName == "mostPlayedGames" )
{
//- Initialize an array for the data
$sub_array = null;
$sub_array = array();
$sub_counter = 0;
while ($reader->read())
{
//- Check for subnodes
if ($reader->nodeType == XMLReader::ELEMENT &&
($reader->name == "friend" ||
$reader->name == "weblink" ||
$reader->name == "group" ||
$reader->name == "mostPlayedGame"))
{
while ($reader->read())
{
//- Get the elements from the subnodes
if ($reader->nodeType == XMLReader::ELEMENT)
{
$subElementName = $reader->name;
//- The node is not empty so an end node is required
//- Consider the data invalid until it is found
$validDatafield = false;
while ($reader->read())
{
//- Check for the subnode value
if ($reader->nodeType == XMLReader::TEXT
|| $reader->nodeType == XMLReader::CDATA
|| $reader->nodeType == XMLReader::WHITESPACE
|| $reader->nodeType ==
XMLReader::SIGNIFICANT_WHITESPACE)
{
//- Store the value
$elementValue = $reader->value;
}
//- Check if this is the subnode end element
else if ($reader->nodeType == XMLReader::END_ELEMENT
&& $reader->name == $subElementName)
{
//- If so the subnode is complete
$validDatafield = true;
break;
}
}
//- If this is a valid subnode, store it in the data array
if ($validDatafield)
{
$sub_array[$sub_counter][$subElementName] =
$elementValue;
$elementValue = '';
}
}
else if ($reader->nodeType == XMLReader::END_ELEMENT &&
($reader->name == "friend" ||
$reader->name == "weblink" ||
$reader->name == "group" ||
$reader->name == "mostPlayedGame" ))
{
$sub_counter++;
break;
}
}
}
else if ($reader->nodeType == XMLReader::END_ELEMENT
&& $reader->name == $elementName)
{
$validDatafield = false;
$data_array[$elementName] = $sub_array;
break;
}
}
}
//- Check for sections that will result in a recursive single dimensional array
else if ( $elementName == "inGameInfo" || $elementName == "favoriteGame" )
{
//- Initialize an array for the data
$sub_array = null;
$sub_array = array();
while ($reader->read())
{
//- Get the elements from the subnodes
if ($reader->nodeType == XMLReader::ELEMENT)
{
$subElementName = $reader->name;
//- The node is not empty so an end node is required
//- Consider the data invalid until it is found
$validDatafield = false;
while ($reader->read())
{
//- Check for the subnode value
if ($reader->nodeType == XMLReader::TEXT
|| $reader->nodeType == XMLReader::CDATA
|| $reader->nodeType == XMLReader::WHITESPACE
|| $reader->nodeType ==
XMLReader::SIGNIFICANT_WHITESPACE)
{
//- Store the value
$elementValue = $reader->value;
}
//- Check if this is the subnode end element
else if ($reader->nodeType == XMLReader::END_ELEMENT
&& $reader->name == $subElementName)
{
//- If so the subnode is complete
$validDatafield = true;
break;
}
}
//- If this is a valid subnode, store it in the data array
if ($validDatafield)
{
$sub_array[$subElementName] = $elementValue;
$elementValue = '';
}
}
else if ($reader->nodeType == XMLReader::END_ELEMENT &&
( $reader->name == "inGameInfo" ||
$reader->name == "favoriteGame" ))
{
$validDatafield = false;
$data_array[$elementName] = $sub_array;
break;
}
}
}
//- Check for single nodes that do not require a recursive array to be used
else
{
//- An end node is required
//- Consider the data invalid until it is found
$validDatafield = false;
while ($reader->read())
{
//- Check for the subnode value
if ($reader->nodeType == XMLReader::TEXT
|| $reader->nodeType == XMLReader::CDATA
|| $reader->nodeType == XMLReader::WHITESPACE
|| $reader->nodeType == XMLReader::SIGNIFICANT_WHITESPACE)
{
//- Store the value
$elementValue = $reader->value;
}
//- Check if this is the subnode end element
else if ($reader->nodeType == XMLReader::END_ELEMENT
&& $reader->name == $elementName)
{
//- If so the subnode is complete
$validDatafield = true;
break;
}
}
//- If this is a valid subnode, store it in the data array
if ($validDatafield)
{
$data_array[$elementName] = $elementValue;
$elementValue = '';
}
}
}
//- Check for the final rootnode end element
else if ($reader->nodeType == XMLReader::END_ELEMENT && $reader->name == $rootnode_name)
{
break;
}
}
}
}
//- Close the XMLReader
$reader->close();
//- Add the regular steam ID to the array as well
$data_array['steamID32'] = $this->calculate_steamid($data_array['steamID64']);
return $data_array;
}
/*
-- Function: get_steamid64
-- Purpose: Check whether we have a regular steam ID, or a 64 bit steam ID and return a 64 bit steam ID either way
-- Arguments: $steam_arg - Either a regular, or a 64 bit steam ID
-- Returns: The 64 bit steam ID, or false if an invalid argument is provided
*/
private function get_steamid64($steam_arg)
{
if (preg_match('/^STEAM_[0-9]:[0-9]:[0-9]{1,}/i', $steam_arg))
{
return $this->calculate_steamid64($steam_arg);
}
else if (preg_match('/^76561197960[0-9]{6}$/i', $steam_arg))
{
return $steam_arg;
}
else
{
return false;
}
}
/*
-- Function: calculate_steamid64
-- Purpose: Translate a steam ID to a 64 bit steam id as used by Valve
-- Arguments: $steam_id - The steam ID to translate
-- Returns: The 64 bit steam ID, or false if an invalid steam ID is provided
*/
public function calculate_steamid64($steam_id)
{
if (preg_match('/^STEAM_[0-9]:[0-9]:[0-9]{1,}/i', $steam_id))
{
$steam_id = str_replace("_", ":", $steam_id);
list($part_one, $part_two, $part_three, $part_four) = explode(':', $steam_id);
$result = bcadd('76561197960265728', $part_four * 2);
$result = bcadd($result, $part_two);
return bcadd($result, $part_three);
}
else
{
return false;
}
}
/*
-- Function: calculate_steamid
-- Purpose: Translate a 64 bit steam ID to a steam id as used by Valve
-- Arguments: $steam_id64 - The 64 bit steam ID to translate
-- Returns: The steam ID, or false if an invalid 64 bit steam ID is provided
*/
public function calculate_steamid($steam_id64)
{
if (preg_match('/^76561197960[0-9]{6}$/i', $steam_id64))
{
$part_one = substr( $steam_id64, -1) % 2 == 0 ? 0 : 1;
$part_two = bcsub( $steam_id64, '76561197960265728' );
$part_two = bcsub( $part_two, $part_one );
$part_two = bcdiv( $part_two, 2 );
return "STEAM_0:" . $part_one . ':' . $part_two;
}
else
{
return false;
}
}
/*
-- Function: steam_connect
-- Purpose: Initialize a connection to the Steam API
-- Arguments: none
-- Returns: void
*/
private function steam_connect()
{
//Disable Errors Warning
//error_reporting(0);
//- Get the TCP protocol (can also use SOL_TCP instead)
$protocol = getprotobyname('tcp');
//- Create a socket
$this->socket = socket_create(AF_INET, SOCK_STREAM, $protocol);
if ($this->socket === false)
throw New Exception('Could not create socket. Reason: ' . socket_strerror(socket_last_error()));
//- The socket should time out after 3 seconds, so make it non blocking for now
socket_set_nonblock($this->socket);
$error = NULL;
$attempts = 0;
//- The time out value has to be in milliseconds
$timeout_ms = $this->timeout * 1000;
$connected;
//- Connect the socket to the steam server
while (!($connected = @socket_connect($this->socket, $this->ip_address, $this->service_port)) && $attempts++ < $timeout_ms)
{
$error = socket_last_error();
//- If the error is different from the below, there is a problem
if ($error != SOCKET_EINPROGRESS && $error != SOCKET_EALREADY)
{
socket_close($this->socket);
throw New Exception('Could not connect to steam community: ' . socket_strerror($error));
exit;
}
//- Wait 1 second between attempts
usleep(1000);
}
//- If it's still not connected then consider the connection timed out
if (!$connected)
{
socket_close($this->socket);
throw New Exception('Connection to steam community timed out.');
exit;
}
//- Make the socket blocking again
socket_set_block($this->socket);
}
/*
-- Function: steam_request
-- Purpose: Sends a HTTP request to the Steam API
-- Arguments: $request_date - The HTTP request to be sent
-- Returns: The 'raw' response data received from the Steam API
*/
private function steam_request($request_data)
{
//- Write the request to the socket
socket_write($this->socket, $request_data, strlen($request_data));
//- Store the response
$buffer = '';
$response = '';
while ($buffer = socket_read($this->socket, 2048))
{
$response .= $buffer;
}
return $response;
}
/*
-- Function: steam_validate
-- Purpose: Checks the HTTP response code to see if the API request was succesful
-- Arguments: $response_data - The response to be validated
-- Returns: void
*/
private function steam_validate($response_data)
{
//- Check if the HTTP response code is 2xx. If so the request was a success
if (!preg_match('@^HTTP/1.1 2[0-9]{2}@s', $response_data))
{
throw New Exception('Request made to steam community failed (HTTP response code ' .
substr($this->response, 9, 3) . ')');
}
}
/*
-- Function: steam_disconnect
-- Purpose: Disconnect from the Steam API
-- Arguments: none
-- Returns: void
*/
private function steam_disconnect()
{
//- Close the socket
socket_close($this->socket);
}
}
?> |
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