关于PHP 如何用 curl 读取 HTTP chunked 数据

<?php 
$url = "http://127.0.0.1:8100/stream";
$ch = curl_init($url);
curl_set($ch, CURLOPT_WRITEFUNCTION, 'myfunc');
$result = curl_exec($ch);
curl_close($ch);
function myfunc($ch, $data){
$bytes = strlen($data);
// 处理 data
return $bytes;
}

function myfunc($ch, $data){
$bytes = strlen($data);
static $buf = '';
$buf .= $data;
while(1){
$pos = strpos($buf, "\n");
if($pos === false){
break;
}
$data = substr($buf, 0, $pos+1);
$buf = substr($buf, $pos+1);
// 处理 data
}
}

<?php
$fp = fsockopen("blog.maxthon.", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
$out = "GET /?feed=rss2 HTTP/1.1\r\n";
$out .= "Host: blog.maxthon.\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
?>

Date: Mon, 29 Mar 2010 10:16:13 GMT
Server: Apache/2.2.8 (Unix) mod_ssl/2.2.8 OpenSSL/0.9.8b PHP/5.2.6
X-Powered-By: PHP/5.2.6
X-Pingback: http://blog.maxthon./xmlrpc.php
Last-Modified: Wed, 03 Mar 2010 03:13:41 GMT
ETag: "8f16b619f32188bde3bc008a60c211"
Keep-Alive: timeout=15, max=120
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/xml; charset=UTF-8
22de
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
<description><![CDATA[2009年12月31日
1711
.......
1fe8
]]></description>
<content:encoded><![CDATA[<p>2009年12月31日<br />
1711</p>

Chunked Transfer Encoding is a mechanism that allows HTTP messages to be split in several parts. This can be applied to both HTTP requests (from client to server) and HTTP responses (from server to client)

<?php
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
);
}

function unchunkHttp11($data) {
$fp = 0;
$outData = "";
while ($fp < strlen($data)) {
$rawnum = substr($data, $fp, strpos(substr($data, $fp), "\r\n") + 2);
$num = hexdec(trim($rawnum));
$fp += strlen($rawnum);
$chunk = substr($data, $fp, $num);
$outData .= $chunk;
$fp += strlen($chunk);
}
return $outData;
}