直接读取即可
1.file_get_contents
header("Content-type: image/png");
$url = $_GET["url"];
$filename = $_GET['url'];
echo file_get_contents($url);
exit;
http://localhost/qq/showimg.php?url=http://app.qlogo.cn/mbloghead/41c62e6cdde14055f484/50
速度很慢
2.fopen fpassthru
header("Content-type: image/png");
$url = $_GET["url"];
$filename = $_GET['url'];
$fp = fopen($filename, 'r');
fpassthru($fp);
fclose($fp);
exit;
采用fpassthru 还是很慢啊
http://localhost/qq/showimg.php?url=http://www.baidu.com/img/baidu_jgylogo3.gif
速度很快。说明如果下载的时候不知道文件结尾，php就下载的很慢。估计有一大块时间在计算文件到底是说明结尾的。
3.使用socket的fsockopen
$host = "app.qlogo.cn";
$f = "/mbloghead/41c62e6cdde14055f484/50";
$fp = fsockopen($host, 80, $errno, $errstr, 30);
if (!$fp) {
echo "ERR:$errstr ($errno)<br />\n";
} else {
$out = "GET $f HTTP/1.1\r\n";
//$out = "GET / HTTP/1.1\r\n";
$out .= "Accept:*/*\r\n";
$out .= "Host: $host\r\n";
//$out .= "Referer: $url\r\n";
$out .= "Connection: Close\r\n\r\n";
$str = "";
fwrite($fp, $out);
while (!feof($fp)) {
$str.=fgets($fp, 128);
}
//echo $str;
$str = trimHeader($str);
echo $str;
fclose($fp);
}
function getHeader($content){
$array=explode("\r\n\r\n",$content);
return $array[0]."\r\n\r\n";
}
function trimHeader($content){
$content = str_replace(getHeader($content),"",$content);
return $content;
}
读取腾讯微博的没有文件结尾的图片速度还是很慢，而读取百度的gif 速度很快。
socket的最大好处当然是伪造cookie，reffer等信息。