标签:tar power div send handler .net 2.2.3 tail url
在前面的例子中,HTTP请求信息头有些指定了 HTTP 1.1,有些指定了 HTTP/1.0,有些又没有指定,那么他们之间有什么区别呢?
关于HTTP 1.1与HTTP 1.0的一些基本情况,可以参考下 HTTP 1.1的详细介绍 。
我们先来看一下 fsockopen 不指定 HTTP 的情况:
function asyn_sendmail() { $ip = ‘121.199.24.143‘; $url = ‘/php/sock.php‘; $fp = fsockopen($ip, 80, $errno, $errstr, 5); if (!$fp) { echo "$errstr ($errno)<br />\n"; } $end = "\r\n"; $input = "GET $url$end"; $input.="$end"; fputs($fp, $input); $html = ‘‘; while (!feof($fp)) { $html.=fgets($fp); } fclose($fp); writelog($html); echo $html; } function writelog($message) { $path = ‘F:\log2.txt‘; $handler = fopen($path, ‘w+b‘); if ($handler) { $success = fwrite($handler, $message); fclose($handler); } } asyn_sendmail();
sock.php:
<?php echo "Welcome to NowaMagic"; ?>
程序输出:
Welcome to NowaMagic
log2.txt 内容也是:
Welcome to NowaMagic
那些接下来再看看在标头加上 HTTP 1.1 的程序:
function asyn_sendmail() { $ip = ‘121.199.24.143‘; $url = ‘/php/sock.php‘; $fp = fsockopen($ip, 80, $errno, $errstr, 5); if (!$fp) { echo "$errstr ($errno)<br />\n"; } $end = "\r\n"; $input = "GET $url HTTP/1.1$end"; //如果不加下面这一句,会返回一个http400错误 $input.="Host: $ip$end"; //如果不加下面这一句,请求会阻塞很久 $input.="Connection: Close$end"; $input.="$end"; fputs($fp, $input); $html = ‘‘; while (!feof($fp)) { $html.=fgets($fp); } fclose($fp); writelog($html); echo $html; } function writelog($message) { $path = ‘F:\log.txt‘; $handler = fopen($path, ‘w+b‘); if ($handler) { $success = fwrite($handler, $message); fclose($handler); } } asyn_sendmail();
程序输出:
HTTP/1.1 200 OK Date: Fri, 07 Feb 2014 13:50:14 GMT Server: Apache/2.2.3 (CentOS) X-Powered-By: PHP/5.3.3 Vary: Accept-Encoding Content-Length: 21 Connection: close Content-Type: text/html; charset=UTF-8 Welcome to NowaMagic
留意到注释:
//如果不加下面这一句,请求会阻塞很久 $input.="Connection: Close$end"; $input.="$end";
原因是什么呢? 可以参考 fsockopen用feof读取http响应内容的一些问题。
//如果不加下面这一句,会返回一个http400错误 $input.="Host: $ip$end";
报400错误:
HTTP/1.1 400 Bad Request Date: Fri, 07 Feb 2014 13:54:57 GMT Server: Apache/2.2.3 (CentOS) Content-Length: 305 Connection: close Content-Type: text/html; charset=iso-8859-1
使用http1.1连接,要加上Host请求表头。
小结:
标签:tar power div send handler .net 2.2.3 tail url
原文地址:http://www.cnblogs.com/phpfensi/p/6927133.html