/**
* Parse the xmlrpc response contained in the string $data and return a Response object.
*
* When $this->debug has been set to a value greater than 0, will echo debug messages to screen while decoding.
*
* @param string $data the xmlrpc response, possibly including http headers
* @param bool $headersProcessed when true prevents parsing HTTP headers for interpretation of content-encoding and
* consequent decoding
* @param string $returnType decides return type, i.e. content of response->value(). Either 'xmlrpcvals', 'xml' or
* 'phpvals'
*
* @return Response
*/
public function parseResponse($data = '', $headersProcessed = false, $returnType = 'xmlrpcvals')
{
if ($this->debug) {
Logger::instance()->debugMessage("---GOT---\n{$data}\n---END---");
}
$this->httpResponse = array('raw_data' => $data, 'headers' => array(), 'cookies' => array());
if ($data == '') {
error_log('XML-RPC: ' . __METHOD__ . ': no response received from server.');
return new Response(0, PhpXmlRpc::$xmlrpcerr['no_data'], PhpXmlRpc::$xmlrpcstr['no_data']);
}
// parse the HTTP headers of the response, if present, and separate them from data
if (substr($data, 0, 4) == 'HTTP') {
$httpParser = new Http();
try {
$this->httpResponse = $httpParser->parseResponseHeaders($data, $headersProcessed, $this->debug);
} catch (\Exception $e) {
$r = new Response(0, $e->getCode(), $e->getMessage());
// failed processing of HTTP response headers
// save into response obj the full payload received, for debugging
$r->raw_data = $data;
return $r;
}
}
// be tolerant of extra whitespace in response body
$data = trim($data);
/// @todo return an error msg if $data=='' ?
// be tolerant of junk after methodResponse (e.g. javascript ads automatically inserted by free hosts)
// idea from Luca Mariano <*****@*****.**> originally in PEARified version of the lib
$pos = strrpos($data, '</methodResponse>');
if ($pos !== false) {
$data = substr($data, 0, $pos + 17);
}
// try to 'guestimate' the character encoding of the received response
$respEncoding = XMLParser::guessEncoding(@$this->httpResponse['headers']['content-type'], $data);
if ($this->debug) {
$start = strpos($data, '<!-- SERVER DEBUG INFO (BASE64 ENCODED):');
if ($start) {
$start += strlen('<!-- SERVER DEBUG INFO (BASE64 ENCODED):');
$end = strpos($data, '-->', $start);
$comments = substr($data, $start, $end - $start);
Logger::instance()->debugMessage("---SERVER DEBUG INFO (DECODED) ---\n\t" . str_replace("\n", "\n\t", base64_decode($comments)) . "\n---END---", $respEncoding);
}
}
// if user wants back raw xml, give it to him
if ($returnType == 'xml') {
$r = new Response($data, 0, '', 'xml');
$r->hdrs = $this->httpResponse['headers'];
$r->_cookies = $this->httpResponse['cookies'];
$r->raw_data = $this->httpResponse['raw_data'];
return $r;
}
if ($respEncoding != '') {
// Since parsing will fail if charset is not specified in the xml prologue,
// the encoding is not UTF8 and there are non-ascii chars in the text, we try to work round that...
// The following code might be better for mb_string enabled installs, but
// makes the lib about 200% slower...
//if (!is_valid_charset($respEncoding, array('UTF-8')))
if (!in_array($respEncoding, array('UTF-8', 'US-ASCII')) && !XMLParser::hasEncoding($data)) {
if ($respEncoding == 'ISO-8859-1') {
$data = utf8_encode($data);
} else {
if (extension_loaded('mbstring')) {
$data = mb_convert_encoding($data, 'UTF-8', $respEncoding);
} else {
error_log('XML-RPC: ' . __METHOD__ . ': invalid charset encoding of received response: ' . $respEncoding);
}
}
}
}
$parser = xml_parser_create();
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, true);
// G. Giunta 2005/02/13: PHP internally uses ISO-8859-1, so we have to tell
// the xml parser to give us back data in the expected charset.
// What if internal encoding is not in one of the 3 allowed?
// we use the broadest one, ie. utf8
// This allows to send data which is native in various charset,
// by extending xmlrpc_encode_entities() and setting xmlrpc_internalencoding
if (!in_array(PhpXmlRpc::$xmlrpc_internalencoding, array('UTF-8', 'ISO-8859-1', 'US-ASCII'))) {
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, 'UTF-8');
} else {
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, PhpXmlRpc::$xmlrpc_internalencoding);
}
$xmlRpcParser = new XMLParser();
xml_set_object($parser, $xmlRpcParser);
if ($returnType == 'phpvals') {
xml_set_element_handler($parser, 'xmlrpc_se', 'xmlrpc_ee_fast');
} else {
xml_set_element_handler($parser, 'xmlrpc_se', 'xmlrpc_ee');
}
xml_set_character_data_handler($parser, 'xmlrpc_cd');
xml_set_default_handler($parser, 'xmlrpc_dh');
// first error check: xml not well formed
if (!xml_parse($parser, $data, count($data))) {
// thanks to Peter Kocks <*****@*****.**>
if (xml_get_current_line_number($parser) == 1) {
$errStr = 'XML error at line 1, check URL';
} else {
$errStr = sprintf('XML error: %s at line %d, column %d', xml_error_string(xml_get_error_code($parser)), xml_get_current_line_number($parser), xml_get_current_column_number($parser));
}
error_log($errStr);
$r = new Response(0, PhpXmlRpc::$xmlrpcerr['invalid_return'], PhpXmlRpc::$xmlrpcstr['invalid_return'] . ' (' . $errStr . ')');
xml_parser_free($parser);
if ($this->debug) {
print $errStr;
}
$r->hdrs = $this->httpResponse['headers'];
$r->_cookies = $this->httpResponse['cookies'];
$r->raw_data = $this->httpResponse['raw_data'];
return $r;
}
xml_parser_free($parser);
// second error check: xml well formed but not xml-rpc compliant
if ($xmlRpcParser->_xh['isf'] > 1) {
if ($this->debug) {
/// @todo echo something for user?
}
$r = new Response(0, PhpXmlRpc::$xmlrpcerr['invalid_return'], PhpXmlRpc::$xmlrpcstr['invalid_return'] . ' ' . $xmlRpcParser->_xh['isf_reason']);
} elseif ($returnType == 'xmlrpcvals' && !is_object($xmlRpcParser->_xh['value'])) {
// something odd has happened
// and it's time to generate a client side error
// indicating something odd went on
$r = new Response(0, PhpXmlRpc::$xmlrpcerr['invalid_return'], PhpXmlRpc::$xmlrpcstr['invalid_return']);
} else {
if ($this->debug > 1) {
Logger::instance()->debugMessage("---PARSED---\n" . var_export($xmlRpcParser->_xh['value'], true) . "\n---END---");
}
// note that using =& will raise an error if $xmlRpcParser->_xh['st'] does not generate an object.
$v =& $xmlRpcParser->_xh['value'];
if ($xmlRpcParser->_xh['isf']) {
/// @todo we should test here if server sent an int and a string, and/or coerce them into such...
if ($returnType == 'xmlrpcvals') {
$errNo_v = $v['faultCode'];
$errStr_v = $v['faultString'];
$errNo = $errNo_v->scalarval();
$errStr = $errStr_v->scalarval();
} else {
$errNo = $v['faultCode'];
$errStr = $v['faultString'];
}
if ($errNo == 0) {
// FAULT returned, errno needs to reflect that
$errNo = -1;
}
$r = new Response(0, $errNo, $errStr);
} else {
$r = new Response($v, 0, '', $returnType);
}
}
$r->hdrs = $this->httpResponse['headers'];
$r->_cookies = $this->httpResponse['cookies'];
$r->raw_data = $this->httpResponse['raw_data'];
return $r;
}
/**
* Parses HTTP an http response headers and separates them from the body.
*
* @param string $data the http response,headers and body. It will be stripped of headers
* @param bool $headersProcessed when true, we assume that response inflating and dechunking has been already carried out
*
* @return array with keys 'headers' and 'cookies'
* @throws \Exception
*/
public function parseResponseHeaders(&$data, $headersProcessed = false, $debug = 0)
{
$httpResponse = array('raw_data' => $data, 'headers' => array(), 'cookies' => array());
// Support "web-proxy-tunelling" connections for https through proxies
if (preg_match('/^HTTP\\/1\\.[0-1] 200 Connection established/', $data)) {
// Look for CR/LF or simple LF as line separator,
// (even though it is not valid http)
$pos = strpos($data, "\r\n\r\n");
if ($pos || is_int($pos)) {
$bd = $pos + 4;
} else {
$pos = strpos($data, "\n\n");
if ($pos || is_int($pos)) {
$bd = $pos + 2;
} else {
// No separation between response headers and body: fault?
$bd = 0;
}
}
if ($bd) {
// this filters out all http headers from proxy.
// maybe we could take them into account, too?
$data = substr($data, $bd);
} else {
error_log('XML-RPC: ' . __METHOD__ . ': HTTPS via proxy error, tunnel connection possibly failed');
throw new \Exception(PhpXmlRpc::$xmlrpcstr['http_error'] . ' (HTTPS via proxy error, tunnel connection possibly failed)', PhpXmlRpc::$xmlrpcerr['http_error']);
}
}
// Strip HTTP 1.1 100 Continue header if present
while (preg_match('/^HTTP\\/1\\.1 1[0-9]{2} /', $data)) {
$pos = strpos($data, 'HTTP', 12);
// server sent a Continue header without any (valid) content following...
// give the client a chance to know it
if (!$pos && !is_int($pos)) {
// works fine in php 3, 4 and 5
break;
}
$data = substr($data, $pos);
}
if (!preg_match('/^HTTP\\/[0-9.]+ 200 /', $data)) {
$errstr = substr($data, 0, strpos($data, "\n") - 1);
error_log('XML-RPC: ' . __METHOD__ . ': HTTP error, got response: ' . $errstr);
throw new \Exception(PhpXmlRpc::$xmlrpcstr['http_error'] . ' (' . $errstr . ')', PhpXmlRpc::$xmlrpcerr['http_error']);
}
// be tolerant to usage of \n instead of \r\n to separate headers and data
// (even though it is not valid http)
$pos = strpos($data, "\r\n\r\n");
if ($pos || is_int($pos)) {
$bd = $pos + 4;
} else {
$pos = strpos($data, "\n\n");
if ($pos || is_int($pos)) {
$bd = $pos + 2;
} else {
// No separation between response headers and body: fault?
// we could take some action here instead of going on...
$bd = 0;
}
}
// be tolerant to line endings, and extra empty lines
$ar = preg_split("/\r?\n/", trim(substr($data, 0, $pos)));
while (list(, $line) = @each($ar)) {
// take care of multi-line headers and cookies
$arr = explode(':', $line, 2);
if (count($arr) > 1) {
$headerName = strtolower(trim($arr[0]));
/// @todo some other headers (the ones that allow a CSV list of values)
/// do allow many values to be passed using multiple header lines.
/// We should add content to $xmlrpc->_xh['headers'][$headerName]
/// instead of replacing it for those...
if ($headerName == 'set-cookie' || $headerName == 'set-cookie2') {
if ($headerName == 'set-cookie2') {
// version 2 cookies:
// there could be many cookies on one line, comma separated
$cookies = explode(',', $arr[1]);
} else {
$cookies = array($arr[1]);
}
foreach ($cookies as $cookie) {
// glue together all received cookies, using a comma to separate them
// (same as php does with getallheaders())
if (isset($httpResponse['headers'][$headerName])) {
$httpResponse['headers'][$headerName] .= ', ' . trim($cookie);
} else {
$httpResponse['headers'][$headerName] = trim($cookie);
}
// parse cookie attributes, in case user wants to correctly honour them
// feature creep: only allow rfc-compliant cookie attributes?
// @todo support for server sending multiple time cookie with same name, but using different PATHs
$cookie = explode(';', $cookie);
foreach ($cookie as $pos => $val) {
$val = explode('=', $val, 2);
$tag = trim($val[0]);
$val = trim(@$val[1]);
/// @todo with version 1 cookies, we should strip leading and trailing " chars
if ($pos == 0) {
$cookiename = $tag;
$httpResponse['cookies'][$tag] = array();
$httpResponse['cookies'][$cookiename]['value'] = urldecode($val);
} else {
if ($tag != 'value') {
$httpResponse['cookies'][$cookiename][$tag] = $val;
}
}
}
}
} else {
$httpResponse['headers'][$headerName] = trim($arr[1]);
}
} elseif (isset($headerName)) {
/// @todo version1 cookies might span multiple lines, thus breaking the parsing above
$httpResponse['headers'][$headerName] .= ' ' . trim($line);
}
}
$data = substr($data, $bd);
if ($debug && count($httpResponse['headers'])) {
$msg = '';
foreach ($httpResponse['headers'] as $header => $value) {
$msg .= "HEADER: {$header}: {$value}\n";
}
foreach ($httpResponse['cookies'] as $header => $value) {
$msg .= "COOKIE: {$header}={$value['value']}\n";
}
Logger::instance()->debugMessage($msg);
}
// if CURL was used for the call, http headers have been processed,
// and dechunking + reinflating have been carried out
if (!$headersProcessed) {
// Decode chunked encoding sent by http 1.1 servers
if (isset($httpResponse['headers']['transfer-encoding']) && $httpResponse['headers']['transfer-encoding'] == 'chunked') {
if (!($data = Http::decodeChunked($data))) {
error_log('XML-RPC: ' . __METHOD__ . ': errors occurred when trying to rebuild the chunked data received from server');
throw new \Exception(PhpXmlRpc::$xmlrpcstr['dechunk_fail'], PhpXmlRpc::$xmlrpcerr['dechunk_fail']);
}
}
// Decode gzip-compressed stuff
// code shamelessly inspired from nusoap library by Dietrich Ayala
if (isset($httpResponse['headers']['content-encoding'])) {
$httpResponse['headers']['content-encoding'] = str_replace('x-', '', $httpResponse['headers']['content-encoding']);
if ($httpResponse['headers']['content-encoding'] == 'deflate' || $httpResponse['headers']['content-encoding'] == 'gzip') {
// if decoding works, use it. else assume data wasn't gzencoded
if (function_exists('gzinflate')) {
if ($httpResponse['headers']['content-encoding'] == 'deflate' && ($degzdata = @gzuncompress($data))) {
$data = $degzdata;
if ($debug) {
Logger::instance()->debugMessage("---INFLATED RESPONSE---[" . strlen($data) . " chars]---\n{$data}\n---END---");
}
} elseif ($httpResponse['headers']['content-encoding'] == 'gzip' && ($degzdata = @gzinflate(substr($data, 10)))) {
$data = $degzdata;
if ($debug) {
Logger::instance()->debugMessage("---INFLATED RESPONSE---[" . strlen($data) . " chars]---\n{$data}\n---END---");
}
} else {
error_log('XML-RPC: ' . __METHOD__ . ': errors occurred when trying to decode the deflated data received from server');
throw new \Exception(PhpXmlRpc::$xmlrpcstr['decompress_fail'], PhpXmlRpc::$xmlrpcerr['decompress_fail']);
}
} else {
error_log('XML-RPC: ' . __METHOD__ . ': the server sent deflated data. Your php install must have the Zlib extension compiled in to support this.');
throw new \Exception(PhpXmlRpc::$xmlrpcstr['cannot_decompress'], PhpXmlRpc::$xmlrpcerr['cannot_decompress']);
}
}
}
}
// end of 'if needed, de-chunk, re-inflate response'
return $httpResponse;
}
