Discuz! 里的函数 dfopen 确实很强大, 不过会遇到一点点小麻烦, 就是并不能完全按照 timeout 设置的时间中断连接.
原函数中只有一次判断, 也就是说当连接成功后, 数据未发送完毕之前连接中断了, 并不能中断该连接, 将造成程序锁死.
所以对原函数做了一些改动, 以避免该情况的发生.
- /*
- 改进后的 dfopen
- */
- function dfopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE) {
- $return = '';
- $matches = parse_url($url);
- $host = $matches['host'];
- $path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
- $port = !empty($matches['port']) ? $matches['port'] : 80;
- if($post) {
- $out = "POST $path HTTP/1.0\r\n";
- $out .= "Accept: */*\r\n";
- //$out .= "Referer: $boardurl\r\n";
- $out .= "Accept-Language: zh-cn\r\n";
- $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
- $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
- $out .= "Host: $host\r\n";
- $out .= 'Content-Length: '.strlen($post)."\r\n";
- $out .= "Connection: Close\r\n";
- $out .= "Cache-Control: no-cache\r\n";
- $out .= "Cookie: $cookie\r\n\r\n";
- $out .= $post;
- } else {
- $out = "GET $path HTTP/1.0\r\n";
- $out .= "Accept: */*\r\n";
- //$out .= "Referer: $boardurl\r\n";
- $out .= "Accept-Language: zh-cn\r\n";
- $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
- $out .= "Host: $host\r\n";
- $out .= "Connection: Close\r\n";
- $out .= "Cookie: $cookie\r\n\r\n";
- }
- $fp = @fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
- if(!$fp) {
- return '';//note $errstr : $errno \r\n
- } else {
- stream_set_blocking($fp, $block);
- stream_set_timeout($fp, $timeout);
- @fwrite($fp, $out);
- while (!feof($fp)) {
- $status = stream_get_meta_data($fp);
- if(!empty($status['timed_out'])) {
- return '';
- }
- if(($header = @fgets($fp)) && ($header == "\r\n" || $header == "\n")) {
- break;
- }
- }
- $stop = false;
- while(!feof($fp) && !$stop) {
- $status = stream_get_meta_data($fp);
- if(!empty($status['timed_out'])) {
- return '';
- }
- $data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
- $return .= $data;
- if($limit) {
- $limit -= strlen($data);
- $stop = $limit <= 0;
- }
- }
- @fclose($fp);
- return $return;
- }
- }
复制代码 原函数
- /*
- Discuz! 原 dfopen 函数
- */
- function dfopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE) {
- $return = '';
- $matches = parse_url($url);
- $host = $matches['host'];
- $path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
- $port = !empty($matches['port']) ? $matches['port'] : 80;
- if($post) {
- $out = "POST $path HTTP/1.0\r\n";
- $out .= "Accept: */*\r\n";
- //$out .= "Referer: $boardurl\r\n";
- $out .= "Accept-Language: zh-cn\r\n";
- $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
- $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
- $out .= "Host: $host\r\n";
- $out .= 'Content-Length: '.strlen($post)."\r\n";
- $out .= "Connection: Close\r\n";
- $out .= "Cache-Control: no-cache\r\n";
- $out .= "Cookie: $cookie\r\n\r\n";
- $out .= $post;
- } else {
- $out = "GET $path HTTP/1.0\r\n";
- $out .= "Accept: */*\r\n";
- //$out .= "Referer: $boardurl\r\n";
- $out .= "Accept-Language: zh-cn\r\n";
- $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
- $out .= "Host: $host\r\n";
- $out .= "Connection: Close\r\n";
- $out .= "Cookie: $cookie\r\n\r\n";
- }
- $fp = @fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
- if(!$fp) {
- return '';
- } else {
- stream_set_blocking($fp, $block);
- stream_set_timeout($fp, $timeout);
- @fwrite($fp, $out);
- $status = stream_get_meta_data($fp);
- if(!$status['timed_out']) {
- while (!feof($fp)) {
- if(($header = @fgets($fp)) && ($header == "\r\n" || $header == "\n")) {
- break;
- }
- }
- $stop = false;
- while(!feof($fp) && !$stop) {
- $data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
- $return .= $data;
- if($limit) {
- $limit -= strlen($data);
- $stop = $limit <= 0;
- }
- }
- }
- @fclose($fp);
- return $return;
- }
- }
复制代码 |