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| <?php
<?php
// proxy http
// auteur: Marc Gauthier
// 02/09/2009
// les erreurs dans les log du serveur
// http://www.papygeek.com/download/53/
// Transfer-Encoding: chunked
//
// Didier Richard - IGN - dérivation pour publication
// (c) IGN 2010
// License : http://creativecommons.org/licenses/by-nc-sa/2.0/fr/
// ----------------------------------------------------------
// global variables :
$debug= 1;
$debug_html= 0;
$sUrl= '';
$sReponse= '';
$chunked= -1;
// via un proxy d'entreprise/IP
$proxy_host= '';
$proxy_port= 80;
$content_types= array(
'application/vnd.google-earth.kml+xml',
'application/vnd.google-earth.kml',
//'application/vnd.google-earth.kmz', # TODO needs to unzip response ...
'application/vnd.ogc.se_xml',
'application/vnd.ogc.wms_xml',
'application/vnd.ogc.wfs_xml',
'application/vnd.ogc.gml',
'application/soap+xml',
'application/xml',
'text/xml',
'text/plain',
'text/html');
// ----------------------------------------------------------
//
// écriture d'un message de log
function carp($msg) {
global $debug;
global $debug_html;
if ($debug) {
if ($debug_html) {
print "__FILE__.:$msg.<br>\n";
}
error_log(__FILE__.": $msg", 0);
}
}
//
// écriture d'un message de log et erreur http
function confess($msg) {
carp($msg);
header("HTTP/1.0 500 $msg");
exit;
}
//
// mode chunk
function unchunk($result) {
return preg_replace_callback(
'/(?:(?:\r\n|\n)|^)([0-9A-F]+)(?:\r\n|\n){1,2}(.*?)'.
'((?:\r\n|\n)(?:[0-9A-F]+(?:\r\n|\n))|$)/si',
create_function(
'$matches',
'return hexdec($matches[1]) == strlen($matches[2]) ? $matches[2] : $matches[0];'
),
$result
);
}
//
// la fonction proxy
// 2 grandes étapes:
// - émission de la requête
// - réception de la réponse
function proxy($sUrl) {
global $proxy_host, $proxy_port, $chunked, $content_types;
//
// analyse de l'url et construction de la requête
$sUrl= urldecode($sUrl);
$referrer= $_SERVER["HTTP_REFERER"];
$userAgent= $_SERVER["HTTP_USER_AGENT"];
$aUrl= @parse_url($sUrl);
if (!isset($aUrl['scheme'])) {
//try absolute and relative path:
confess("proxy scheme missing");
}
// construction de la requete
$acceptH= $_SERVER['HTTP_ACCEPT'];
$pragmaH= $_SERVER['HTTP_PRAGMA'];
$cacheControlH= $_SERVER['HTTP_CACHE_CONTROL'];
$acceptLanguageH= $_SERVER['HTTP_ACCEPT_CHARSET'];
$keepAliveH= $_SERVER['HTTP_KEEP_ALIVE'];
$acceptEncodingH= $_SERVER['HTTP_ACCEPT_ENCODING'];
$connectionH= $_SERVER['HTTP_CONNECTION'];
$SOAPActionH= $_SERVER['HTTP_SOAPACTION'];
$acceptCharsetH= $_SERVER['HTTP_ACCEPT_CHARSET'];
$gppKeyH= $_SERVER['HTTP_GPPKEY'];#if gppKey in HTTP Header
$Hs= "Host: ".$aUrl['host'].($aUrl['port']? ":".$aUrl['port'] : "")."\r\n"
. (strlen($acceptH)>0? "Accept: ".$acceptH : join(",", $content_types))."\r\n"
. (strlen($pragmaH)>0? "Pragma: ".$pragmaH."\r\n" : "")
. (strlen($cacheControlH)>0? "Cache-Control: ".$cacheControlH."\r\n" : "")
. (strlen($acceptLanguageH)>0? "Accept-Language: ".$acceptLanguageH."\r\n" : "")
. (strlen($keepAliveH)>0? "Keep-Alive: ".$keepAliveH."\r\n" : "")
. (strlen($acceptEncodingH)>0? "Accept-Encoding: ".$acceptEncodingH."\r\n" : "")
. (strlen($connectionH)>0? "Connection: ".$connectionH."\r\n" : "")
. (strlen($SOAPActionH)>0? "SOAPAction: ".$SOAPActionH."\r\n" : "")
. (strlen($acceptCharsetH)>0? "Accept-Charset: ".$acceptCharsetH."\r\n" : "")
. (strlen($gppKeyH)>0? "gppkey: ".$gppKeyH."\r\n" : "")
. (strlen($referrer)>0? "Referer: ".$referrer."\r\n" : "")
. (strlen($userAgent)>0? "User-Agent: ".$userAgent."\r\n" : "")
;
carp($Hs);
if ($_SERVER["REQUEST_METHOD"]==='GET') {
$sReq= "GET $sUrl HTTP/1.0\r\n"
. $Hs
;
} else {
if ($_SERVER["REQUEST_METHOD"]==='POST') {
$data= '';
if (count($_POST)){
while (list($key, $val)= each($_POST)){
$data.="$key : $val\n";
}
} else {
$data= trim(file_get_contents('php://input'));
}
$sReq= "POST $sUrl HTTP/1.0\r\n"
. $Hs
. "Content-Type: text/xml\r\n"
. "Content-length: ".strlen($data)."\r\n"
. "\r\n"
. $data
;
}
}
$sReq.= "\r\n";
if (empty($proxy_host)) {
$host= $aUrl["host"];
$port= $aUrl["port"] ? $aUrl["port"] : 80;
} else {
$host= $proxy_host;
$port= $proxy_port;
}
// envoi de la requête
carp("host:$host port:$port url:$sUrl");
$fp= @fsockopen($host, $port, $errno, $errstr, 5);
if (!$fp) {
confess("fsockopen failed: $errstr ($errno)");
}
carp("sReq:$sReq");
fwrite($fp, $sReq);
// attente de la réponse
$headers= '';
$sReponse= '';
ob_start();
while (!feof($fp)) {
$sReponse.= fread($fp, 4096);
}
fclose ($fp);
$eoh= strpos($sReponse, "\r\n\r\n");
$headers= substr($sReponse, 0, $eoh);
$sReponse= substr($sReponse, $eoh+4);
$Hs= preg_split('/(?:\r\n|\n)/', $headers);
carp("Hs=[".count($hs)."]");
for ($i= 0, $l= count($hs); $i<$l; $i++) {
if (preg_match('/^Content-Length/i', $hs[$i])) {
continue;
}
if (preg_match('/^Transfer-Encoding: chunked/i', $hs[$i])) {
// Transfer-Encoding: chunked
carp("chunked response");
$sReponse= unchunck($sReponse);
continue;
}
#carp("header=[$hs[$i]]");
header($hs[$i]);
}
header("Content-Length: ".strlen($sReponse));
print $sReponse;
}
// ----------------------------------------------------------
// programme principal:
// on accept que GET/POST (pour l'instant)
if (($_SERVER["REQUEST_METHOD"]==='GET' or $_SERVER["REQUEST_METHOD"]==='POST') &&
(isset($_REQUEST["url"]) && strlen($_REQUEST["url"])>0)) {
$sUrl= substr($_SERVER["QUERY_STRING"],4);
carp("GET url:$sUrl");
proxy($sUrl);
exit;
}
// on ne traite pas la demande :
carp("REQUEST_METHOD:".$_SERVER["REQUEST_METHOD"]." QUERY_STRING:".$_SERVER["QUERY_STRING"] );
if ($debug) {
phpinfo(INFO_VARIABLES);
}
exit;
// ----------------------------------------------------------
?> |
