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<?php |
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/* |
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The Malete project - the Z39.2/Z39.50 database framework of OpenIsis. |
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Version 0.9.x (patchlevel see file Version) |
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Copyright (C) 2001-2004 by Erik Grziwotz, erik@openisis.org |
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|
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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|
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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|
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see README for more information |
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EOH */ |
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|
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// $Id: Http.php,v 1.2 2004/11/03 13:56:57 kripke Exp $ |
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|
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|
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/** |
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This class represents the connection to a HTTP server. |
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This is not for general purpose, but to transfer Isis records over HTTP. |
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|
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@version $Revision: 1.2 $ |
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@license LGPL |
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@package Isis |
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*/ |
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class Isis_Http extends Isis_Server { |
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var $head; |
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/** |
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whether we need PHP's nutty v%d[] on parameters |
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*/ |
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var $nuts = 0; |
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|
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|
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/** static |
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convert Isis_Rec to urlencoded parameters. |
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should be a method of Isis_Rec, |
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however, since feeble PHP has to parse all the cruft |
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on every single request, better limit the code to where it's needed. |
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*/ |
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function toUrl ( $rec, $nuts = 0 ) |
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{ |
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$res = ''; |
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if ($i = $rec->len()) |
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for ( $res = '', $t = reset($rec->tag), $v = reset($rec->val); ; |
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$t = next($rec->tag), $v = next($rec->val) |
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) { |
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if ( $nuts ) |
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// use v42[]: the [] so we can send multiple values, |
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// and the v cause numerical named params as [] |
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// tend to crash PHP; GET always, POST sometimes works ... |
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// (it's such a feeble ugly pile of shirt) |
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$res .= 'v' . $t . '%5B%5D=' . urlencode($v); |
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else |
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$res .= $t . '=' . urlencode($v); |
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if ( !--$i ) break; |
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$res .= '&'; |
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} |
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return $res; |
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} |
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|
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|
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/** static |
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we ARE on the nutty side -- try to turn http request into something usable |
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see toUrl nuts above for the format |
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UNFORTUNATELY we have no way to tell the original order of parameters. |
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hmm ... for get we could resort to parse QUERY_STRING manually |
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@param mixed $db_or_fdt a Isis_Db object or just it's fdt array |
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to look up names. |
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*/ |
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function fromReq ( $db_or_fdt = null, $server_map = null ) |
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{ |
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if ( is_object($db_or_fdt) ) { |
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$req = new Isis_Rec( '-db', $db_or_fdt ); |
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$fdt = $db_or_fdt->fdt; |
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} else { |
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$req = new Isis_Rec; |
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$fdt = $db_or_fdt; // array or null |
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} |
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if ( $server_map ) |
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foreach ($server_map as $k => $v) |
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if (isset($_SERVER[$k])) |
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$req->append( $v, $_SERVER[$k] ); |
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foreach (array($_GET,$_POST) as $in) |
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foreach ($in as $k => $v) { |
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if ( $fdt ) { |
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if ( !is_int($k = $fdt[$k]) ) |
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continue; |
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} elseif ( is_numeric($k) ) |
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$k = (int)$k; |
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elseif ( sscanf( $k, 'v%d', &$i ) ) |
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$k = (int)$i; |
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else |
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continue; |
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if (is_string($v)) |
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$req->append($k, $v); |
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else foreach ($v as $w) // Wolfsburg |
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$req->append($k, $w); |
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} |
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return $req; |
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} |
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|
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|
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/** |
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pers 1: use pfsockopen and keep-alive |
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pers -1: only keep-alive (for multiple requests within one run) |
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pers 0: neither |
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*/ |
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function Isis_Http ( $host, $url, $php = 0, $port = 80, $pers = 0 ) |
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{ |
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$this->host = $host; |
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$this->port = $port; |
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$this->pers = 0 < $pers; |
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$this->head = 'POST '.$url." HTTP/1.1\r\n" |
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. 'Host: '.$host."\r\n" |
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. "User-Agent: Isis\r\n" |
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// try keep-alive. fnord does not support that with cgi |
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. ($pers ? "Connection: keep-alive\r\n" : '') |
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. "Content-Type: application/x-www-form-urlencoded\r\n" |
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. 'Content-Length: '; |
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$this->nuts = $php; |
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$this->open(); |
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} |
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|
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|
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|
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function request ( $req ) |
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{ |
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if ( !$this->sock && !$this->open() ) |
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return null; |
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$url = Isis_Http::toUrl( $req, $this->nuts ); |
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fwrite($this->sock, $this->head . strlen($url) ."\r\n\r\n" . $url ); |
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// as opposed to folklore (http://www.php.net/manual/en/ref.stream.php), |
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// there is NO trailing CRLF in 1.1 (RTFM err ... RFC 2068 4.1 Page 30) |
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fflush($this->sock); |
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$ka = 0; // keepalive -- default for 1.1, explicit for 1.0 |
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$ok = ($line = fgets($this->sock)) |
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&& sscanf( $line, "HTTP/1.%d 200 OK", &$ka ); |
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$chunk = 0; |
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while ( ($line = fgets($this->sock)) && trim($line) ) { |
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// echo "---$line---"; |
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if ( !strncasecmp('connection: keep-alive', $line, 22) ) |
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$ka = $ok; |
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elseif ( !strncasecmp('connection: close', $line, 17) ) |
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$ka = 0; |
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elseif ( !strncasecmp('transfer-encoding: chunked', $line, 26) ) |
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$chunk = 1; |
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} |
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if ( !$ok ) |
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$res = null; |
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else { |
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$txt = ''; |
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if ($chunk) { |
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// RFC 2068 3.6 Page 25, 19.4.6 Page 154 |
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while ( ($line = fgets($this->sock)) && trim($line) |
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&& sscanf( $line, "%x", &$chunk ) && $chunk |
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) { |
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// error_log( "///chunk size $chunk///\n" ); |
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$data = fread( $this->sock, $chunk ); |
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$txt .= $data; |
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fread( $this->sock, 2 ); // a CRLF |
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} |
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while ( ($line = fgets($this->sock)) && trim($line) ) // eat footer |
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; // echo "???$line???\n"; |
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} else |
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// HERE we rely on our other end being cooperative, |
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// nicely ending response with blank line |
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while ( ($line = fgets($this->sock)) && trim($line) ) { |
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// echo "+++$line+++"; |
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$txt .= $line; |
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} |
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$res = new Isis_Rec; |
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$res->parse($txt, ISIS_REC_TEXT); |
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} |
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if ( !$ka ) { |
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fclose( $this->sock ); |
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$this->sock = 0; |
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} |
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return $res; |
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} |
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|
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} // class Isis_Http |
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?> |
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