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<?php
/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
interface IWebService {
function get ( $entity, $id, $include, $filter, $version = '1' );
function post( $entity, $id, $data, $version = '1' );
}
class mbWebService implements IWebService {
private $host;
private $port;
private $pathPrefix;
private $lastError;
private $fSock;
private $lastResponse = "";
private $lastHeaders = array();
function mbWebService( $host="musicbrainz.org", $port=80, $pathPrefix="/ws" ) {
$this->host = $host;
$this->port = $port;
$this->pathPrefix = $pathPrefix;
$this->fSock = -1;
}
function connect() {
$this->fSock = fsockopen( $this->host, $this->port, $errno, $this->lastError, 30 );
if ( $this->fSock == false ) {
$this->fSock = -1;
return false;
}
return true;
}
function close() {
if ( $this->fSock != -1 ) {
fclose($this->fSock);
$this->fSock = -1;
return true;
}
else {
$this->lastError = "Trying to close closed socket.";
return false;
}
}
function parseHeaders( $string ) {
$lines = explode( "\n", $string );
$this->lastHeaders = array();
foreach ( $lines as $key => $line ) {
// Status line
if ( $key == 0 ) {
if ( !preg_match( "/^HTTP\/(\d+)\.(\d+) (\d+) .+$/", $line, $matches ) ) {
$this->lastHeader = array();
return false;
}
else {
$this->lastHeaders['HTTP_major_version'] = $matches[1];
$this->lastHeaders['HTTP_minor_version'] = $matches[2];
$this->lastHeaders['HTTP_status'] = $matches[3];
}
}
// Empty line
else if ( $line == "\r" ) {
$new_string = "";
for ( $i = $key+1; $i < sizeof($lines); $i++ )
$new_string .= $lines[$i] . "\n";
return $new_string;
}
// Not a header
else if ( !preg_match( "/^([^:]+): (.+)\r$/", $line, $matches ) ) {
$this->lastHeaders = array();
return false;
}
// A header
else
$this->lastHeaders[$matches[1]] = $matches[2];
}
$this->lastHeaders = array();
return false;
}
function getHeaders() {
return $this->lastHeaders;
}
function sendRequest( $string, $post_data='' ) {
if ( $this->fSock == -1 ) {
$this->lastError = "Trying to write to closed socket.";
return false;
}
fwrite( $this->fSock, $string . "\r\n" );
fwrite( $this->fSock, "Host: " . $this->host . "\r\n" );
fwrite( $this->fSock, "Accept: */*\r\n" );
fwrite( $this->fSock, "User-Agent: phpMbQuery\r\n" );
//fwrite( $this->fSock, "Keep-Alive: 60\r\n" );
//fwrite( $this->fSock, "Connection: keep-alive\r\n" );
fwrite( $this->fSock, "Connection: close\r\n\r\n" );
fwrite( $this->fSock, $post_data . "\r\n\r\n" );
return true;
}
function getResponse() {
if ( $this->fSock == -1 ) {
$this->lastError = "Trying to read from closed socket.";
return false;
}
$buffer = "";
while ( !feof($this->fSock) )
$buffer .= fread( $this->fSock, 4096 );
if ( !$this->parseHeaders($buffer) )
return $buffer;
return $this->parseHeaders($buffer);
}
function get( $entity, $uid, $includes, $filters, $version="1" ) {
$params = array();
$params['type'] = "xml";
if ( is_array($includes) ) {
$inc_string = "";
foreach ( $includes as $inc ) {
if ( $inc_string != "" )
$inc_string .= " ";
$inc_string .= $inc;
}
if ( $inc_string != "" )
$params['inc'] = $inc_string;
}
if ( is_array($filters) ) {
foreach ( $filters as $filter => $value )
$params[$filter] = $value;
}
$URI = $this->pathPrefix . "/" . $version . "/" . $entity . "/" . $uid . "?" . $this->build_query( $params );
if ( $this->fSock == -1 && !$this->connect() )
return false;
$this->sendRequest( "GET $URI HTTP/1.1" );
$this->lastResponse = $this->getResponse();
$this->close();
if ( isset($this->lastHeaders['HTTP_status']) && $this->lastHeaders['HTTP_status'] != 200 )
return false;
return $this->lastResponse;
}
function post( $entity, $id, $data, $version = '1' ) {
$URI = $this->pathPrefix . '/' . $version . '/' . $entity . '/' . $id;
if ( $this->fSock == -1 && !$this->connect() )
return false;
$this->sendRequest( "POST $URI HTTP/1.1", $data );
$this->lastResponse = $this->getResponse();
$this->close();
if ( isset($this->lastHeaders['HTTP_status']) && $this->lastHeaders['HTTP_status'] != 200 )
return false;
return $this->lastResponse;
}
function build_query( $array ) {
$first = true;
$query_string = "";
if ( !is_array($array) || sizeof($array) == 0 )
return "";
foreach ( $array as $key => $value ) {
$query_string .= ($first?"":"&") . "$key=" . urlencode($value);
if ( $first )
$first = false;
}
return $query_string;
}
}
?>
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