<?php
/*
P_PROXY v0.2
@author:haozigege
@time:2016/3/19
@windows extension=php_curl.dll(php.ini)
@linux cd ext/curl;phpize  ./configure –with-curl;make;
@info url全部通过GET来传递,如果使用POST，则读取POST数据发送请求,可以给中国菜刀提供接口;
cookie和其他http头部信息可以直接从请求中读取。
@update 修改了host不一致的问题,去除了method参数简化了逻辑结构。
*/

function get_result($curlobj){
	$result=curl_exec($curlobj);
	$headerSize=curl_getinfo($curlobj,CURLINFO_HEADER_SIZE);
	$res_header=substr($result, 0, $headerSize);
	$result	=substr($result,$headerSize);
	curl_close($curlobj); 
	set_response_header($res_header);
	echo $result;
}
function getmyheader($curlobj,$headerlines){
	$res_headers=$headerlines;
	return $res_headers;
}
function set_response_header($headers){
	$headarr=explode("\r\n",$headers);
	foreach($headarr as $key=>$value){
		header($value);
	}
}

function init_curl($link,$headers){
	$curlobj = curl_init(); 
    curl_setopt($curlobj,CURLOPT_URL,$link); 
	curl_setopt($curlobj, CURLOPT_RETURNTRANSFER, 1);//raw output
	curl_setopt($curlobj, CURLOPT_HTTPHEADER, $headers);
	curl_setopt($curlobj, CURLOPT_HEADER, 1);
	return	$curlobj;
}


foreach(getallheaders() as $key=>$value){
	if ($key=='Content-Length' and isset($_POST)){
		$post=http_build_query($_POST);
		$value=strlen($post);
	}
	$headers[]=$key.':'.$value;
}

if(isset($_REQUEST['url'])){
	$link=$_REQUEST['url'];
	$url=explode('/',$link)[2];

	/* curl setting */
	$curlobj = init_curl($link,$headers);

	//GET
	if ($_SERVER['REQUEST_METHOD']=='GET'){
		//READ FILE
		if(substr($link, 0,7)=='file://'){
		echo substr($link,7);
		$result="";
		//$result=file_get_contents(substr($link,7));
		echo $result;
		curl_close($curlobj);
		}else{
			curl_setopt($curlobj, CURLOPT_POST, 0); 
			curl_setopt($curlobj, CURLOPT_HTTPHEADER, ["HOST",$url]);
			get_result($curlobj);
			}
		}else {
		//POST
			curl_setopt($curlobj, CURLOPT_POST, 1);
			curl_setopt($curlobj, CURLOPT_POSTFIELDS,$post);
			curl_setopt($curlobj, CURLOPT_HTTPHEADER, ["HOST",$url]);
			get_result($curlobj);
			}
}else{
	echo 'invalid request';
}


?>