一些尝试，关于Rss
时间：2010-08-23 来源：那天
/**
* 解析出所有rss文件中的节点，包括元素节点，文本节点等
* 当然可以用正则表达式匹配。但是用字符串函数更能体现其性能。
* 实现很乱，也花了不少时间。主要是一些鸡毛蒜皮的事儿，导致
* 时间无法保证。
*/
public function _token_parse()
{
$str = $this->rss_str;
$str_len = strlen(trim($str));
/**
* $depth 记录节点的深度, <xx> or </xx> 有相同的深度
*/
$depth = 0;
//$_LEFT_ANGLE_BRACKET_ASCII = ord('<');
/**
* $state 状态使<xx></xx>配对
*/
$state = 0;
/**
* $token 保存每一个节点（包含属性)
*/
$token = '';
$_L_A = ord('<');
$_R_A = ord('>');
$_SLASH = ord('/');
for ($i = 0; $i < $str_len; $i++) {
while (trim($str[$i]) == '') $i++;
if (ord($str[$i]) == $_L_A) {
if (ord($str[$i+1]) == $_SLASH) {
$depth--;
while ($i < $str_len && ord($str[$i]) != $_R_A) {
$token .= $str[$i];
$i++;
}
$state = 1;
} else if (ord($str[$i+1]) == ord('?')) {
/**
* XML 版本信息 <?xml ... ?>
*/
while ($i < $str_len && substr($str, $i, 2) != '?>') {
$token .= $str[$i];
$i++;
}
$token .= '?';
$i = $i + 1;
/**
* xml版本信息深度为0
*/
$depth = 0;
} else if (substr($str, $i, 4) == '<rss') {
while ($i < $str_len && $str[$i] != '>') {
$token .= $str[$i];
$i++;
}
/**
* rss版本信息深度为0
*/
$depth = 0;
} else if (substr($str, $i, 9) == '<![CDATA[') {
/**
* 处理名字空间content 相关内容 <![CDATA[ ........ ]]>
*/
$depth++;
while ($i < $str_len && substr($str, $i, 3) != ']]>') {
$token .= $str[$i];
$i++;
}
$token .= ']]';
$i = $i + 2;
} else if (substr($str, $i, 4) == '<!--'){
/**
* 处理注释<!--......-->
*/
while ($i < $str_len && substr($str, $i, 3) != '-->') {
$i++;
}
$i = $i + 2;
} else {
if ($state == 0)
$depth++;
while ($i < $str_len && ord($str[$i]) != $_R_A) {
$token .= $str[$i];
$i++;
}
$state = 0;
}
if ($state == 0 && ord($str[$i-1]) == $_SLASH) {
$state = 1;
}
if (trim($token) != '')
$token .= $str[$i];
} else {
$depth++;
while ($i < $str_len && ord($str[$i]) != $_L_A) {
$token .= $str[$i];
$i++;
}
$i = $i - 1;
}
if (trim($token) != '') {
$this->_tokens[] = array($depth, $token);
$token = '';
}
//echo $state . '>' . $depth . "\n";
}
return $this->_tokens;
}
对于以上这段代码，没有任何意义。作用只是扫除所有Rss文档中的节点。比如一个个形如<xx> or </xx>的，或者是文本。其实它主要是处理标准文档，也就是说，已经处理成标准xml文档且符合rss结构能产生结构。其中数字是节点深度。没有特殊意义，就直闲暇玩乐，当然代码写的很乱。
对于如何处理把不标准的文档处理成标准rss文档，是有很多人已经实现过了的。也贴出来，分享下。
<?php /************************************************* Snoopy - the PHP net client Author: Monte Ohrt <[email protected]> Copyright (c): 1999-2000 ispi, all rights reserved Version: 1.0 * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA You may contact the author of Snoopy by e-mail at: [email protected] Or, write to: Monte Ohrt CTO, ispi 237 S. 70th suite 220 Lincoln, NE 68510 The latest version of Snoopy can be obtained from: http://snoopy.sourceforge.com *************************************************/ class Snoopy { /**** Public variables ****/ /* user definable vars */ var $host = "www.php.net"; // host name we are connecting to var $port = 80; // port we are connecting to var $proxy_host = ""; // proxy host to use var $proxy_port = ""; // proxy port to use var $agent = "Snoopy v1.0"; // agent we masquerade as var $referer = ""; // referer info to pass var $cookies = array(); // array of cookies to pass // $cookies["username"]="joe"; var $rawheaders = array(); // array of raw headers to send // $rawheaders["Content-type"]="text/html"; var $maxredirs = 5; // http redirection depth maximum. 0 = disallow var $lastredirectaddr = ""; // contains address of last redirected address var $offsiteok = true; // allows redirection off-site var $maxframes = 0; // frame content depth maximum. 0 = disallow var $expandlinks = true; // expand links to fully qualified URLs. // this only applies to fetchlinks() // or submitlinks() var $passcookies = true; // pass set cookies back through redirects // NOTE: this currently does not respect // dates, domains or paths. var $user = ""; // user for http authentication var $pass = ""; // password for http authentication // http accept types var $accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*"; var $results = ""; // where the content is put var $error = ""; // error messages sent here var $response_code = ""; // response code returned from server var $headers = array(); // headers returned from server sent here var $maxlength = 500000; // max return data length (body) var $read_timeout = 0; // timeout on read operations, in seconds // supported only since PHP 4 Beta 4 // set to 0 to disallow timeouts var $timed_out = false; // if a read operation timed out var $status = 0; // http request status var $curl_path = "/usr/bin/curl"; // Snoopy will use cURL for fetching // SSL content if a full system path to // the cURL binary is supplied here. // set to false if you do not have // cURL installed. See http://curl.haxx.se // for details on installing cURL. // Snoopy does *not* use the cURL // library functions built into php, // as these functions are not stable // as of this Snoopy release. // send Accept-encoding: gzip? var $use_gzip = true; /**** Private variables ****/ var $_maxlinelen = 4096; // max line length (headers) var $_httpmethod = "GET"; // default http request method var $_httpversion = "HTTP/1.0"; // default http request version var $_submit_method = "POST"; // default submit method var $_submit_type = "application/x-www-form-urlencoded"; // default submit type var $_mime_boundary = ""; // MIME boundary for multipart/form-data submit type var $_redirectaddr = false; // will be set if page fetched is a redirect var $_redirectdepth = 0; // increments on an http redirect var $_frameurls = array(); // frame src urls var $_framedepth = 0; // increments on frame depth var $_isproxy = false; // set if using a proxy server var $_fp_timeout = 30; // timeout for socket connection /*======================================================================*\ Function: fetch Purpose: fetch the contents of a web page (and possibly other protocols in the future like ftp, nntp, gopher, etc.) Input: $URI the location of the page to fetch Output: $this->results the output text from the fetch \*======================================================================*/ function fetch($URI) { //preg_match("|^([^:]+)://([^:/]+)(:[\d]+)*(.*)|",$URI,$URI_PARTS); $URI_PARTS = parse_url($URI); if (!empty($URI_PARTS["user"])) $this->user = $URI_PARTS["user"]; if (!empty($URI_PARTS["pass"])) $this->pass = $URI_PARTS["pass"]; switch($URI_PARTS["scheme"]) { case "http": $this->host = $URI_PARTS["host"]; if(!empty($URI_PARTS["port"])) $this->port = $URI_PARTS["port"]; if($this->_connect($fp)) { if($this->_isproxy) { // using proxy, send entire URI $this->_httprequest($URI,$fp,$URI,$this->_httpmethod); } else { $path = $URI_PARTS["path"].(isset($URI_PARTS["query"]) ? "?".$URI_PARTS["query"] : ""); // no proxy, send only the path $this->_httprequest($path, $fp, $URI, $this->_httpmethod); } $this->_disconnect($fp); if($this->_redirectaddr) { /* url was redirected, check if we've hit the max depth */ if($this->maxredirs > $this->_redirectdepth) { // only follow redirect if it's on this site, or offsiteok is true if(preg_match("|^http://".preg_quote($this->host)."|i",$this->_redirectaddr) || $this->offsiteok) { /* follow the redirect */ $this->_redirectdepth++; $this->lastredirectaddr=$this->_redirectaddr; $this->fetch($this->_redirectaddr); } } } if($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) { $frameurls = $this->_frameurls; $this->_frameurls = array(); while(list(,$frameurl) = each($frameurls)) { if($this->_framedepth < $this->maxframes) { $this->fetch($frameurl); $this->_framedepth++; } else break; } } } else { return false; } return true; break; case "https": if(!$this->curl_path || (!is_executable($this->curl_path))) { $this->error = "Bad curl ($this->curl_path), can't fetch HTTPS \n"; return false; } $this->host = $URI_PARTS["host"]; if(!empty($URI_PARTS["port"])) $this->port = $URI_PARTS["port"]; if($this->_isproxy) { // using proxy, send entire URI $this->_httpsrequest($URI,$URI,$this->_httpmethod); } else { $path = $URI_PARTS["path"].($URI_PARTS["query"] ? "?".$URI_PARTS["query"] : ""); // no proxy, send only the path $this->_httpsrequest($path, $URI, $this->_httpmethod); } if($this->_redirectaddr) { /* url was redirected, check if we've hit the max depth */ if($this->maxredirs > $this->_redirectdepth) { // only follow redirect if it's on this site, or offsiteok is true if(preg_match("|^http://".preg_quote($this->host)."|i",$this->_redirectaddr) || $this->offsiteok) { /* follow the redirect */ $this->_redirectdepth++; $this->lastredirectaddr=$this->_redirectaddr; $this->fetch($this->_redirectaddr); } } } if($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) { $frameurls = $this->_frameurls; $this->_frameurls = array(); while(list(,$frameurl) = each($frameurls)) { if($this->_framedepth < $this->maxframes) { $this->fetch($frameurl); $this->_framedepth++; } else break; } } return true; break; default: // not a valid protocol $this->error = 'Invalid protocol "'.$URI_PARTS["scheme"].'"\n'; return false; break; } return true; } /*======================================================================*\ Private functions \*======================================================================*/ /*======================================================================*\ Function: _striplinks Purpose: strip the hyperlinks from an html document Input: $document document to strip. Output: $match an array of the links \*======================================================================*/ function _striplinks($document) { preg_match_all("'<\s*a\s+.*href\s*=\s* # find <a href= ([\"\'])? # find single or double quote (?(1) (.*?)\\1 | ([^\s\>]+)) # if quote found, match up to next matching # quote, otherwise match up to next space 'isx",$document,$links); // catenate the non-empty matches from the conditional subpattern while(list($key,$val) = each($links[2])) { if(!empty($val)) $match[] = $val; } while(list($key,$val) = each($links[3])) { if(!empty($val)) $match[] = $val; } // return the links return $match; } /*======================================================================*\ Function: _stripform Purpose: strip the form elements from an html document Input: $document document to strip. Output: $match an array of the links \*======================================================================*/ function _stripform($document) { preg_match_all("'<\/?(FORM|INPUT|SELECT|TEXTAREA|(OPTION))[^<>]*>(?(2)(.*(?=<\/?(option|select)[^<>]*>[\r\n]*)|(?=[\r\n]*))|(?=[\r\n]*))'Usi",$document,$elements); // catenate the matches $match = implode("\r\n",$elements[0]); // return the links return $match; } /*======================================================================*\ Function: _striptext Purpose: strip the text from an html document Input: $document document to strip. Output: $text the resulting text \*======================================================================*/ function _striptext($document) { // I didn't use preg eval (//e) since that is only available in PHP 4.0. // so, list your entities one by one here. I included some of the // more common ones. $search = array("'<script[^>]*?>.*?</script>'si", // strip out javascript "'<[\/\!]*?[^<>]*?>'si", // strip out html tags "'([\r\n])[\s]+'", // strip out white space "'&(quote|#34);'i", // replace html entities "'&(amp|#38);'i", "'&(lt|#60);'i", "'&(gt|#62);'i", "'&(nbsp|#160);'i", "'&(iexcl|#161);'i", "'&(cent|#162);'i", "'&(pound|#163);'i", "'&(copy|#169);'i" ); $replace = array( "", "", "\\1", "\"", "&", "<", ">", " ", chr(161), chr(162), chr(163), chr(169)); $text = preg_replace($search,$replace,$document); return $text; } /*======================================================================*\ Function: _expandlinks Purpose: expand each link into a fully qualified URL Input: $links the links to qualify $URI the full URI to get the base from Output: $expandedLinks the expanded links \*======================================================================*/ function _expandlinks($links,$URI) { preg_match("/^[^\?]+/",$URI,$match); $match = preg_replace("|/[^\/\.]+\.[^\/\.]+$|","",$match[0]); $search = array( "|^http://".preg_quote($this->host)."|i", "|^(?!http://)(\/)?(?!mailto:)|i", "|/\./|", "|/[^\/]+/\.\./|" ); $replace = array( "", $match."/", "/", "/" ); $expandedLinks = preg_replace($search,$replace,$links); return $expandedLinks; } /*======================================================================*\ Function: _httprequest Purpose: go get the http data from the server Input: $url the url to fetch $fp the current open file pointer $URI the full URI $body body contents to send if any (POST) Output: \*======================================================================*/ function _httprequest($url,$fp,$URI,$http_method,$content_type="",$body="") { if($this->passcookies && $this->_redirectaddr) $this->setcookies(); $URI_PARTS = parse_url($URI); if(empty($url)) $url = "/"; $headers = $http_method." ".$url." ".$this->_httpversion."\r\n"; if(!empty($this->agent)) $headers .= "User-Agent: ".$this->agent."\r\n"; if(!empty($this->host) && !isset($this->rawheaders['Host'])) $headers .= "Host: ".$this->host."\r\n"; if(!empty($this->accept)) $headers .= "Accept: ".$this->accept."\r\n"; if($this->use_gzip) { // make sure PHP was built with --with-zlib // and we can handle gzipp'ed data if ( function_exists(gzinflate) ) { $headers .= "Accept-encoding: gzip\r\n"; } else { trigger_error( "use_gzip is on, but PHP was built without zlib support.". " Requesting file(s) without gzip encoding.", E_USER_NOTICE); } } if(!empty($this->referer)) $headers .= "Referer: ".$this->referer."\r\n"; if(!empty($this->cookies)) { if(!is_array($this->cookies)) $this->cookies = (array)$this->cookies; reset($this->cookies); if ( count($this->cookies) > 0 ) { $cookie_headers .= 'Cookie: '; foreach ( $this->cookies as $cookieKey => $cookieVal ) { $cookie_headers .= $cookieKey."=".urlencode($cookieVal)."; "; } $headers .= substr($cookie_headers,0,-2) . "\r\n"; } } if(!empty($this->rawheaders)) { if(!is_array($this->rawheaders)) $this->rawheaders = (array)$this->rawheaders; while(list($headerKey,$headerVal) = each($this->rawheaders)) $headers .= $headerKey.": ".$headerVal."\r\n"; } if(!empty($content_type)) { $headers .= "Content-type: $content_type"; if ($content_type == "multipart/form-data") $headers .= "; boundary=".$this->_mime_boundary; $headers .= "\r\n"; } if(!empty($body)) $headers .= "Content-length: ".strlen($body)."\r\n"; if(!empty($this->user) || !empty($this->pass)) $headers .= "Authorization: BASIC ".base64_encode($this->user.":".$this->pass)."\r\n"; $headers .= "\r\n"; // set the read timeout if needed if ($this->read_timeout > 0) socket_set_timeout($fp, $this->read_timeout); $this->timed_out = false; fwrite($fp,$headers.$body,strlen($headers.$body)); $this->_redirectaddr = false; unset($this->headers); // content was returned gzip encoded? $is_gzipped = false; while($currentHeader = fgets($fp,$this->_maxlinelen)) { if ($this->read_timeout > 0 && $this->_check_timeout($fp)) { $this->status=-100; return false; } // if($currentHeader == "\r\n") if(preg_match("/^\r?\n$/", $currentHeader) ) break; // if a header begins with Location: or URI:, set the redirect if(preg_match("/^(Location:|URI:)/i",$currentHeader)) { // get URL portion of the redirect preg_match("/^(Location:|URI:)\s+(.*)/",chop($currentHeader),$matches); // look for :// in the Location header to see if hostname is included if(!preg_match("|\:\/\/|",$matches[2])) { // no host in the path, so prepend $this->_redirectaddr = $URI_PARTS["scheme"]."://".$this->host.":".$this->port; // eliminate double slash if(!preg_match("|^/|",$matches[2])) $this->_redirectaddr .= "/".$matches[2]; else $this->_redirectaddr .= $matches[2]; } else $this->_redirectaddr = $matches[2]; } if(preg_match("|^HTTP/|",$currentHeader)) { if(preg_match("|^HTTP/[^\s]*\s(.*?)\s|",$currentHeader, $status)) { $this->status= $status[1]; } $this->response_code = $currentHeader; } if (preg_match("/Content-Encoding: gzip/", $currentHeader) ) { $is_gzipped = true; } $this->headers[] = $currentHeader; } # $results = fread($fp, $this->maxlength); $results = ""; while ( $data = fread($fp, $this->maxlength) ) { $results .= $data; if ( strlen($results) > $this->maxlength ) { break; } } // gunzip if ( $is_gzipped ) { // per http://www.php.net/manual/en/function.gzencode.php $results = substr($results, 10); $results = gzinflate($results); } if ($this->read_timeout > 0 && $this->_check_timeout($fp)) { $this->status=-100; return false; } // check if there is a a redirect meta tag if(preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]+URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i",$results,$match)) { $this->_redirectaddr = $this->_expandlinks($match[1],$URI); } // have we hit our frame depth and is there frame src to fetch? if(($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i",$results,$match)) { $this->results[] = $results; for($x=0; $x<count($match[1]); $x++) $this->_frameurls[] = $this->_expandlinks($match[1][$x],$URI_PARTS["scheme"]."://".$this->host); } // have we already fetched framed content? elseif(is_array($this->results)) $this->results[] = $results; // no framed content else $this->results = $results; return true; } /*======================================================================*\ Function: _httpsrequest Purpose: go get the https data from the server using curl Input: $url the url to fetch $URI the full URI $body body contents to send if any (POST) Output: \*======================================================================*/ function _httpsrequest($url,$URI,$http_method,$content_type="",$body="") { if($this->passcookies && $this->_redirectaddr) $this->setcookies(); $headers = array(); $URI_PARTS = parse_url($URI); if(empty($url)) $url = "/"; // GET ... header not needed for curl //$headers[] = $http_method." ".$url." ".$this->_httpversion; if(!empty($this->agent)) $headers[] = "User-Agent: ".$this->agent; if(!empty($this->host)) $headers[] = "Host: ".$this->host; if(!empty($this->accept)) $headers[] = "Accept: ".$this->accept; if(!empty($this->referer)) $headers[] = "Referer: ".$this->referer; if(!empty($this->cookies)) { if(!is_array($this->cookies)) $this->cookies = (array)$this->cookies; reset($this->cookies); if ( count($this->cookies) > 0 ) { $cookie_str = 'Cookie: '; foreach ( $this->cookies as $cookieKey => $cookieVal ) { $cookie_str .= $cookieKey."=".urlencode($cookieVal)."; "; } $headers[] = substr($cookie_str,0,-2); } } if(!empty($this->rawheaders)) { if(!is_array($this->rawheaders)) $this->rawheaders = (array)$this->rawheaders; while(list($headerKey,$headerVal) = each($this->rawheaders)) $headers[] = $headerKey.": ".$headerVal; } if(!empty($content_type)) { if ($content_type == "multipart/form-data") $headers[] = "Content-type: $content_type; boundary=".$this->_mime_boundary; else $headers[] = "Content-type: $content_type"; } if(!empty($body)) $headers[] = "Content-length: ".strlen($body); if(!empty($this->user) || !empty($this->pass)) $headers[] = "Authorization: BASIC ".base64_encode($this->user.":".$this->pass); for($curr_header = 0; $curr_header < count($headers); $curr_header++) { $cmdline_params .= " -H \"".$headers[$curr_header]."\""; } if(!empty($body)) $cmdline_params .= " -d \"$body\""; if($this->read_timeout > 0) $cmdline_params .= " -m ".$this->read_timeout; $headerfile = uniqid(time()); # accept self-signed certs $cmdline_params .= " -k"; exec($this->curl_path." -D \"/tmp/$headerfile\"".escapeshellcmd($cmdline_params)." ".escapeshellcmd($URI),$results,$return); if($return) { $this->error = "Error: cURL could not retrieve the document, error $return."; return false; } $results = implode("\r\n",$results); $result_headers = file("/tmp/$headerfile"); $this->_redirectaddr = false; unset($this->headers); for($currentHeader = 0; $currentHeader < count($result_headers); $currentHeader++) { // if a header begins with Location: or URI:, set the redirect if(preg_match("/^(Location: |URI: )/i",$result_headers[$currentHeader])) { // get URL portion of the redirect preg_match("/^(Location: |URI:)(.*)/",chop($result_headers[$currentHeader]),$matches); // look for :// in the Location header to see if hostname is included if(!preg_match("|\:\/\/|",$matches[2])) { // no host in the path, so prepend $this->_redirectaddr = $URI_PARTS["scheme"]."://".$this->host.":".$this->port; // eliminate double slash if(!preg_match("|^/|",$matches[2])) $this->_redirectaddr .= "/".$matches[2]; else $this->_redirectaddr .= $matches[2]; } else $this->_redirectaddr = $matches[2]; } if(preg_match("|^HTTP/|",$result_headers[$currentHeader])) { $this->response_code = $result_headers[$currentHeader]; if(preg_match("|^HTTP/[^\s]*\s(.*?)\s|",$this->response_code, $match)) { $this->status= $match[1]; } } $this->headers[] = $result_headers[$currentHeader]; } // check if there is a a redirect meta tag if(preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]+URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i",$results,$match)) { $this->_redirectaddr = $this->_expandlinks($match[1],$URI); } // have we hit our frame depth and is there frame src to fetch? if(($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i",$results,$match)) { $this->results[] = $results; for($x=0; $x<count($match[1]); $x++) $this->_frameurls[] = $this->_expandlinks($match[1][$x],$URI_PARTS["scheme"]."://".$this->host); } // have we already fetched framed content? elseif(is_array($this->results)) $this->results[] = $results; // no framed content else $this->results = $results; unlink("/tmp/$headerfile"); return true; } /*======================================================================*\ Function: setcookies() Purpose: set cookies for a redirection \*======================================================================*/ function setcookies() { for($x=0; $x<count($this->headers); $x++) { if(preg_match("/^set-cookie:[\s]+([^=]+)=([^;]+)/i", $this->headers[$x],$match)) $this->cookies[$match[1]] = $match[2]; } } /*======================================================================*\ Function: _check_timeout Purpose: checks whether timeout has occurred Input: $fp file pointer \*======================================================================*/ function _check_timeout($fp) { if ($this->read_timeout > 0) { $fp_status = socket_get_status($fp); if ($fp_status["timed_out"]) { $this->timed_out = true; return true; } } return false; } /*======================================================================*\ Function: _connect Purpose: make a socket connection Input: $fp file pointer \*======================================================================*/ function _connect(&$fp) { if(!empty($this->proxy_host) && !empty($this->proxy_port)) { $this->_isproxy = true; $host = $this->proxy_host; $port = $this->proxy_port; } else { $host = $this->host; $port = $this->port; } $this->status = 0; if($fp = fsockopen( $host, $port, $errno, $errstr, $this->_fp_timeout )) { // socket connection succeeded return true; } else { // socket connection failed $this->status = $errno; switch($errno) { case -3: $this->error="socket creation failed (-3)"; case -4: $this->error="dns lookup failure (-4)"; case -5: $this->error="connection refused or timed out (-5)"; default: $this->error="connection failed (".$errno.")"; } return false; } } /*======================================================================*\ Function: _disconnect Purpose: disconnect a socket connection Input: $fp file pointer \*======================================================================*/ function _disconnect($fp) { return(fclose($fp)); } /*======================================================================*\ Function: _prepare_post_body Purpose: Prepare post body according to encoding type Input: $formvars - form variables $formfiles - form upload files Output: post body \*======================================================================*/ function _prepare_post_body($formvars, $formfiles) { settype($formvars, "array"); settype($formfiles, "array"); if (count($formvars) == 0 && count($formfiles) == 0) return; switch ($this->_submit_type) { case "application/x-www-form-urlencoded": reset($formvars); while(list($key,$val) = each($formvars)) { if (is_array($val) || is_object($val)) { while (list($cur_key, $cur_val) = each($val)) { $postdata .= urlencode($key)."[]=".urlencode($cur_val)."&"; } } else $postdata .= urlencode($key)."=".urlencode($val)."&"; } break; case "multipart/form-data": $this->_mime_boundary = "Snoopy".md5(uniqid(microtime())); reset($formvars); while(list($key,$val) = each($formvars)) { if (is_array($val) || is_object($val)) { while (list($cur_key, $cur_val) = each($val)) { $postdata .= "--".$this->_mime_boundary."\r\n"; $postdata .= "Content-Disposition: form-data; name=\"$key\[\]\"\r\n\r\n"; $postdata .= "$cur_val\r\n"; } } else { $postdata .= "--".$this->_mime_boundary."\r\n"; $postdata .= "Content-Disposition: form-data; name=\"$key\"\r\n\r\n"; $postdata .= "$val\r\n"; } } reset($formfiles); while (list($field_name, $file_names) = each($formfiles)) { settype($file_names, "array"); while (list(, $file_name) = each($file_names)) { if (!is_readable($file_name)) continue; $fp = fopen($file_name, "r"); $file_content = fread($fp, filesize($file_name)); fclose($fp); $base_name = basename($file_name); $postdata .= "--".$this->_mime_boundary."\r\n"; $postdata .= "Content-Disposition: form-data; name=\"$field_name\"; filename=\"$base_name\"\r\n\r\n"; $postdata .= "$file_content\r\n"; } } $postdata .= "--".$this->_mime_boundary."--\r\n"; break; } return $postdata; } } ?>
如果有时间也是可以看看这段代码的，代码实现比较漂亮。
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