Current File : /home/vacivi36/ava/lib/phpxmlrpc/Helper/Http.php
<?php
namespace PhpXmlRpc\Helper;
use PhpXmlRpc\Exception\HttpException;
use PhpXmlRpc\PhpXmlRpc;
class Http
{
/**
* Decode a string that is encoded with "chunked" transfer encoding as defined in rfc2068 par. 19.4.6
* Code shamelessly stolen from nusoap library by Dietrich Ayala.
*
* @param string $buffer the string to be decoded
*
* @return string
* @internal this function will become protected in the future
*/
public static function decodeChunked($buffer)
{
// length := 0
$length = 0;
$new = '';
// read chunk-size, chunk-extension (if any) and crlf
// get the position of the linebreak
$chunkEnd = strpos($buffer, "\r\n") + 2;
$temp = substr($buffer, 0, $chunkEnd);
$chunkSize = hexdec(trim($temp));
$chunkStart = $chunkEnd;
while ($chunkSize > 0) {
$chunkEnd = strpos($buffer, "\r\n", $chunkStart + $chunkSize);
// just in case we got a broken connection
if ($chunkEnd == false) {
$chunk = substr($buffer, $chunkStart);
// append chunk-data to entity-body
$new .= $chunk;
$length += strlen($chunk);
break;
}
// read chunk-data and crlf
$chunk = substr($buffer, $chunkStart, $chunkEnd - $chunkStart);
// append chunk-data to entity-body
$new .= $chunk;
// length := length + chunk-size
$length += strlen($chunk);
// read chunk-size and crlf
$chunkStart = $chunkEnd + 2;
$chunkEnd = strpos($buffer, "\r\n", $chunkStart) + 2;
if ($chunkEnd == false) {
break; //just in case we got a broken connection
}
$temp = substr($buffer, $chunkStart, $chunkEnd - $chunkStart);
$chunkSize = hexdec(trim($temp));
$chunkStart = $chunkEnd;
}
return $new;
}
/**
* 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 $headersProcessed when true, we assume that response inflating and dechunking has been already carried out
*
* @return array with keys 'headers', 'cookies', 'raw_data' and 'status_code'
* @throws HttpException
*/
public function parseResponseHeaders(&$data, $headersProcessed = false, $debug=0)
{
$httpResponse = array('raw_data' => $data, 'headers'=> array(), 'cookies' => array(), 'status_code' => null);
// Support "web-proxy-tunnelling" 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, $bd);
} else {
Logger::instance()->errorLog('XML-RPC: ' . __METHOD__ . ': HTTPS via proxy error, tunnel connection possibly failed');
throw new HttpException(PhpXmlRpc::$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)) {
/// @todo this construct works fine in php 3, 4 and 5 - 8; would it not be enough to have !== false now ?
break;
}
$data = substr($data, $pos);
}
// When using Curl to query servers using Digest Auth, we get back a double set of http headers.
// We strip out the 1st...
if ($headersProcessed && preg_match('/^HTTP\/[0-9](?:\.[0-9])? 401 /', $data)) {
if (preg_match('/(\r?\n){2}HTTP\/[0-9](?:\.[0-9])? 200 /', $data)) {
$data = preg_replace('/^HTTP\/[0-9](?:\.[0-9])? 401 .+?(?:\r?\n){2}(HTTP\/[0-9.]+ 200 )/s', '$1', $data, 1);
}
}
if (preg_match('/^HTTP\/([0-9](?:\.[0-9])?) ([0-9]{3}) /', $data, $matches)) {
$httpResponse['protocol_version'] = $matches[1];
$httpResponse['status_code'] = $matches[2];
}
if ($httpResponse['status_code'] !== '200') {
$errstr = substr($data, 0, strpos($data, "\n") - 1);
Logger::instance()->errorLog('XML-RPC: ' . __METHOD__ . ': HTTP error, got response: ' . $errstr);
throw new HttpException(PhpXmlRpc::$xmlrpcstr['http_error'] . ' (' . $errstr . ')', PhpXmlRpc::$xmlrpcerr['http_error'], null, $httpResponse['status_code'] );
}
// 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, $pos)));
foreach($ar as $line) {
// 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...
/// @todo should we drop support for rfc2965 (set-cookie2) cookies? It has been obsoleted since 2011
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]);
$val = isset($val[1]) ? 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 = static::decodeChunked($data)) {
Logger::instance()->errorLog('XML-RPC: ' . __METHOD__ . ': errors occurred when trying to rebuild the chunked data received from server');
throw new HttpException(PhpXmlRpc::$xmlrpcstr['dechunk_fail'], PhpXmlRpc::$xmlrpcerr['dechunk_fail'], null, $httpResponse['status_code']);
}
}
// Decode gzip-compressed stuff
// code shamelessly inspired from nusoap library by Dietrich Ayala
if (isset($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 {
Logger::instance()->errorLog('XML-RPC: ' . __METHOD__ . ': errors occurred when trying to decode the deflated data received from server');
throw new HttpException(PhpXmlRpc::$xmlrpcstr['decompress_fail'], PhpXmlRpc::$xmlrpcerr['decompress_fail'], null, $httpResponse['status_code']);
}
} else {
Logger::instance()->errorLog('XML-RPC: ' . __METHOD__ . ': the server sent deflated data. Your php install must have the Zlib extension compiled in to support this.');
throw new HttpException(PhpXmlRpc::$xmlrpcstr['cannot_decompress'], PhpXmlRpc::$xmlrpcerr['cannot_decompress'], null, $httpResponse['status_code']);
}
}
}
} // end of 'if needed, de-chunk, re-inflate response'
return $httpResponse;
}
}
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