php的http协议怎么使用

1、采集远程文件/** * 采集远程文件 * * @access public * @param string $remote * 远程文件名 * @param string $local * 本地保存文件名 * @return mixed */ static public function curlDownload($remote, $local) { $cp = curl_init ( $remote ); $fp = fopen ( $local, "w" ); curl_setopt ( $cp, CURLOPT_FILE, $fp ); curl_setopt ( $cp, CURLOPT_HEADER, 0 ); curl_exec ( $cp ); curl_close ( $cp ); fclose ( $fp ); }

2、/** * 使用 fsockopen 通过 HTTP 协议直接访问(采集)远程文件 * 如果主机或服务器没有开启 CURL 扩展可考虑使用 * fsockopen 比 CURL 稍慢,但性能稳定 * * @static * * @access public * @param string $url * 远程URL * @param array $conf * 其他配置信息 * int limit 分段读取字符个数 * string post post的内容,字符串或数组,key=value&形式 * string cookie 携带cookie访问,该参数是cookie内容 * string ip 如果该参数传入,$url将不被使用,ip访问优先 * int timeout 采集超时时间 * bool block 是否阻塞访问,默认为true * @return mixed */ static public function fsockopenDownload($url, $conf = array()) { $return = ''; if (! is_array ( $conf )) return $return;$matches = parse_url ( $url ); ! isset ( $matches ['host'] ) && $matches ['host'] = ''; ! isset ( $matches ['path'] ) && $matches ['path'] = ''; ! isset ( $matches ['query'] ) && $matches ['query'] = ''; ! isset ( $matches ['port'] ) && $matches ['port'] = ''; $host = $matches ['host']; $path = $matches ['path'] ? $matches ['path'] . ($matches ['query'] ? '?' . $matches ['query'] : '') : '/'; $port = ! empty ( $matches ['port'] ) ? $matches ['port'] : 80; $conf_arr = array ( 'limit' => 0, 'post' => '', 'cookie' => '', 'ip' => '', 'timeout' => 15, 'block' => TRUE ); foreach ( array_merge ( $conf_arr, $conf ) as $k => $v ) ${$k} = $v; if ($post) { if (is_array ( $post )) { $post = http_build_query ( $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; } }

3、/** * 下载文件 * 可以指定下载显示的文件名，并自动发送相应的Header信息 * 如果指定了content参数，则下载该参数的内容 * * @static * * @access public * @param string $filename * 下载文件名 * @param string $showname * 下载显示的文件名 * @param string $content * 下载的内容 * @param integer $expire * 下载内容浏览器缓存时间 * @return void */ static public function download($filename, $showname = '', $content = '', $expire = 180) { if (is_file ( $filename )) { $length = filesize ( $filename ); } elseif (is_file ( UPLOAD_PATH . $filename )) { $filename = UPLOAD_PATH . $filename; $length = filesize ( $filename ); } elseif ($content != '') { $length = strlen ( $content ); } else { E ( $filename . L ( '下载文件不存在！' ) ); } if (empty ( $showname )) { $showname = $filename; } $showname = basename ( $showname ); if (! empty ( $filename )) { $finfo = new \finfo ( FILEINFO_MIME ); $type = $finfo->file ( $filename ); } else { $type = "application/octet-stream"; }

4、// 发送Http Header信息 开始下载 header ( "Pragma: public" ); header ( "Cache-control: max-age=" . $expire ); // header('Cache-Control: no-store, no-cache, must-revalidate'); header ( "Expires: " . gmdate ( "D, d M Y H:i:s", time () + $expire ) . "GMT" ); header ( "Last-Modified: " . gmdate ( "D, d M Y H:i:s", time () ) . "GMT" ); header ( "Content-Disposition: attachment; filename=" . $showname ); header ( "Content-Length: " . $length ); header ( "Content-type: " . $type ); header ( 'Content-Encoding: none' ); header ( "Content-Transfer-Encoding: binary" ); if ($content == '') { readfile ( $filename ); } else { echo ($content); } exit (); }

5、/** * 显示HTTP Header 信息 * * @return string */ static function getHeaderInfo($header = '', $echo = true) { ob_start (); $headers = getallheaders (); if (! empty ( $header )) { $info = $headers [$header]; echo ($header . ':' . $info . "\n"); ; } else { foreach ( $headers as $key => $val ) { echo ("$key:$val\n"); } } $output = ob_get_clean (); if ($echo) { echo (nl2br ( $output )); } else { return $output; } }