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MDL-8018 initial import of curl emulation library and handy HTTPRetriever

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http://code.blitzaffe.com/pages/phpclasses/files/libcurl_emulator_52-7
  http://code.blitzaffe.com/pages/phpclasses/files/http_retriever_52-6
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skodak 2007-01-02 20:38:20 +00:00
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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CURL Extension Emulation Library
Version 1.0.3
Copyright 2004-2005, Steve Blinch
http://code.blitzaffe.com
============================================================================
DESCRIPTION
Provides a pure-PHP implementation of the PHP CURL extension, for use on
systems which do not already have the CURL extension installed. It emulates
all of the curl_* functions normally provided by the CURL extension itself.
This will automatically detect and use the best CURL implementation available
on your server. It will attempt the following, in order:
1) Check for the existence of the "real" CURL PHP Extension. If it is
loaded, the library will do nothing (and it will not interfere with the
"real" extension).
2) Check for the existence of the CURL console binary (usually located in
/usr/bin/curl). If found, the library will emulate the CURL PHP
extension (including all curl_* functions) and use the console binary
to execute all requests.
3) If neither the "real" CURL PHP Extension nor the CURL console binary
are available, the library will emulate the CURL PHP extension (including
all curl_* functions) using a native, pure-PHP HTTP client implementation.
This implementation is somewhat limited, but it provides support for most
of the common CURL options. HTTPS (SSL) support is available in this
mode under PHP 4.3.0 if the OpenSSL Extension is loaded.
Thus, by including this library in your project, you can rely on having some
level of CURL support regardless of the configuration of the server on which
it is being used.
USAGE
Simply copy all of the libcurlemu files into your project directory, then:
require_once("libcurlemu.inc.php");
After this, you can use all of the curl_* functions documented in the PHP
Manual.
EXAMPLE
// CURL Extension Emulation Library Example
//
// Usage should be straightforward; you simply use this script exactly as you
// would normally use the PHP CURL extension functions.
// first, include libcurlemu.inc.php
require_once('libcurlemu.inc.php');
// at this point, libcurlemu has detected the best available CURL solution
// (either the CURL extension, if available, or the CURL commandline binary,
// if available, or as a last resort, HTTPRetriever, our native-PHP HTTP
// client implementation) and has implemented the curl_* functions if
// necessary, so you can use CURL normally and safely assume that all CURL
// functions are available.
// the rest of this example code is copied straight from the PHP manual's
// reference for the curl_init() function, and will work fine with libcurlemu
// create a new CURL resource
$ch = curl_init();
// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch, CURLOPT_HEADER, false);
// grab URL and pass it to the browser
curl_exec($ch);
// close CURL resource, and free up system resources
curl_close($ch);
LICENSE
This script is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This script 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 General Public License for more
details.
You should have received a copy of the GNU General Public License along
with this script; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

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<?php
/* CURL Extension Emulation Library
* Version 1.0.3
* Copyright 2004-2005, Steve Blinch
* http://code.blitzaffe.com
* ============================================================================
*
* DESCRIPTION
*
* Provides a pure-PHP implementation of the PHP CURL extension, for use on
* systems which do not already have the CURL extension installed. It emulates
* all of the curl_* functions normally provided by the CURL extension itself.
*
* This will automatically detect and use the best CURL implementation available
* on your server. It will attempt the following, in order:
*
* 1) Check for the existence of the "real" CURL PHP Extension. If it is
* loaded, the library will do nothing (and it will not interfere with the
* "real" extension).
* 2) Check for the existence of the CURL console binary (usually located in
* /usr/bin/curl). If found, the library will emulate the CURL PHP
* extension (including all curl_* functions) and use the console binary
* to execute all requests.
* 3) If neither the "real" CURL PHP Extension nor the CURL console binary
* are available, the library will emulate the CURL PHP extension (including
* all curl_* functions) using a native, pure-PHP HTTP client implementation.
* This implementation is somewhat limited, but it provides support for most
* of the common CURL options. HTTPS (SSL) support is available in this
* mode under PHP 4.3.0 if the OpenSSL Extension is loaded.
*
* Thus, by including this library in your project, you can rely on having some
* level of CURL support regardless of the configuration of the server on which
* it is being used.
*
*
* USAGE
*
* Simply copy all of the libcurlemu files into your project directory, then:
*
* require_once("libcurlemu.inc.php");
*
* After this, you can use all of the curl_* functions documented in the PHP
* Manual.
*
*
* EXAMPLE
*
* // CURL Extension Emulation Library Example
* //
* // Usage should be straightforward; you simply use this script exactly as you
* // would normally use the PHP CURL extension functions.
*
* // first, include libcurlemu.inc.php
* require_once('libcurlemu.inc.php');
*
* // at this point, libcurlemu has detected the best available CURL solution
* // (either the CURL extension, if available, or the CURL commandline binary,
* // if available, or as a last resort, HTTPRetriever, our native-PHP HTTP
* // client implementation) and has implemented the curl_* functions if
* // necessary, so you can use CURL normally and safely assume that all CURL
* // functions are available.
*
* // the rest of this example code is copied straight from the PHP manual's
* // reference for the curl_init() function, and will work fine with libcurlemu
*
* // create a new CURL resource
* $ch = curl_init();
*
* // set URL and other appropriate options
* curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
* curl_setopt($ch, CURLOPT_HEADER, false);
*
* // grab URL and pass it to the browser
* curl_exec($ch);
*
* // close CURL resource, and free up system resources
* curl_close($ch);
*
*
* LICENSE
*
* This script is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This script 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this script; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
if (!extension_loaded('curl') && !function_exists('curl_init')) {
define('CURLEXT_MISSING_ABORT',true);
require_once(dirname(__FILE__)."/libcurlexternal.inc.php");
if (!function_exists('curl_init')) {
require_once(dirname(__FILE__)."/class_HTTPRetriever.php");
require_once(dirname(__FILE__)."/libcurlnative.inc.php");
}
}
?>

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<?php
/* CURL Extension Emulation Library (Console Binary)
* Copyright 2004-2005, Steve Blinch
* http://code.blitzaffe.com
* ============================================================================
*
* DESCRIPTION
*
* Provides a pure-PHP implementation of the PHP CURL extension, for use on
* systems which do not already have the CURL extension installed. It emulates
* all of the curl_* functions normally provided by the CURL extension itself
* by wrapping the CURL console binary.
*
* This library will automatically detect whether or not the "real" CURL
* extension is installed, and if so, it will not interfere. Thus, it can be
* used to ensure that, one way or another, the CURL functions are available
* for use.
*
* This library is actually a wrapper for the CURL console application (usually
* found in /usr/bin/curl), so you must have the CURL binary installed in order
* to use this script.
*
*
* USAGE
*
* Please see the PHP documentation under the "CURL, Client URL Library
* Functions" section for information about using this library. Almost all of
* the documentation and examples in the PHP manual should work with this
* library.
*
*
* LICENSE
*
* This script is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This script 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this script; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// if the real CURL PHP extension is installed, exit without doing anything
if (!extension_loaded("curl")) {
// if the CURL path was not defined by the calling script, define it
if (!defined("CURL_PATH")) define("CURL_PATH","/usr/bin/curl");
// if the CURL binary was not found, do one of the following:
// - if CURLEXT_MISSING_ABORT was defined, then exit without implementing the CURL functions
// - if CURLEXT_MISSING_IGNORE was defined, then implement the CURL functions anyway (even
// though they won't work without the CURL binary installed)
// - otherwise, raise a fatal error and halt the script
if (!is_executable(CURL_PATH)) {
if (defined("CURLEXT_MISSING_ABORT") && CURLEXT_MISSING_ABORT) {
return;
} elseif (defined("CURLEXT_MISSING_IGNORE") && CURLEXT_MISSING_IGNORE) {
// proceed and implement the CURL functions anyway, even though they won't work
} else {
trigger_error("CURL extension is not loaded, and the commandline version of CURL was not found at ".CURL_PATH,E_USER_ERROR);
}
}
define("CURLEXT_VERSION","1.0.0");
define('CURLOPT_NOTHING',0);
define('CURLOPT_FILE',10001);
define('CURLOPT_URL',10002);
define('CURLOPT_PORT',3);
define('CURLOPT_PROXY',10004);
define('CURLOPT_USERPWD',10005);
define('CURLOPT_PROXYUSERPWD',10006);
define('CURLOPT_RANGE',10007);
define('CURLOPT_INFILE',10009);
define('CURLOPT_ERRORBUFFER',10010);
define('CURLOPT_WRITEFUNCTION',20011);
define('CURLOPT_READFUNCTION',20012);
define('CURLOPT_TIMEOUT',13);
define('CURLOPT_INFILESIZE',14);
define('CURLOPT_POSTFIELDS',10015);
define('CURLOPT_REFERER',10016);
define('CURLOPT_FTPPORT',10017);
define('CURLOPT_USERAGENT',10018);
define('CURLOPT_LOW_SPEED_LIMIT',19);
define('CURLOPT_LOW_SPEED_TIME',20);
define('CURLOPT_RESUME_FROM',21);
define('CURLOPT_COOKIE',10022);
define('CURLOPT_HTTPHEADER',10023);
define('CURLOPT_HTTPPOST',10024);
define('CURLOPT_SSLCERT',10025);
define('CURLOPT_SSLCERTPASSWD',10026);
define('CURLOPT_SSLKEYPASSWD',10026);
define('CURLOPT_CRLF',27);
define('CURLOPT_QUOTE',10028);
define('CURLOPT_WRITEHEADER',10029);
define('CURLOPT_COOKIEFILE',10031);
define('CURLOPT_SSLVERSION',32);
define('CURLOPT_TIMECONDITION',33);
define('CURLOPT_TIMEVALUE',34);
define('CURLOPT_HTTPREQUEST',10035);
define('CURLOPT_CUSTOMREQUEST',10036);
define('CURLOPT_STDERR',10037);
define('CURLOPT_POSTQUOTE',10039);
define('CURLOPT_WRITEINFO',10040);
define('CURLOPT_VERBOSE',41);
define('CURLOPT_HEADER',42);
define('CURLOPT_NOPROGRESS',43);
define('CURLOPT_NOBODY',44);
define('CURLOPT_FAILONERROR',45);
define('CURLOPT_UPLOAD',46);
define('CURLOPT_POST',47);
define('CURLOPT_FTPLISTONLY',48);
define('CURLOPT_FTPAPPEND',50);
define('CURLOPT_NETRC',51);
define('CURLOPT_FOLLOWLOCATION',52);
define('CURLOPT_FTPASCII',53);
define('CURLOPT_TRANSFERTEXT',53);
define('CURLOPT_PUT',54);
define('CURLOPT_MUTE',55);
define('CURLOPT_PROGRESSFUNCTION',20056);
define('CURLOPT_PROGRESSDATA',10057);
define('CURLOPT_AUTOREFERER',58);
define('CURLOPT_PROXYPORT',59);
define('CURLOPT_POSTFIELDSIZE',60);
define('CURLOPT_HTTPPROXYTUNNEL',61);
define('CURLOPT_INTERFACE',10062);
define('CURLOPT_KRB4LEVEL',10063);
define('CURLOPT_SSL_VERIFYPEER',64);
define('CURLOPT_CAINFO',10065);
define('CURLOPT_PASSWDFUNCTION',20066);
define('CURLOPT_PASSWDDATA',10067);
define('CURLOPT_MAXREDIRS',68);
define('CURLOPT_FILETIME',10069);
define('CURLOPT_TELNETOPTIONS',10070);
define('CURLOPT_MAXCONNECTS',71);
define('CURLOPT_CLOSEPOLICY',72);
define('CURLOPT_CLOSEFUNCTION',20073);
define('CURLOPT_FRESH_CONNECT',74);
define('CURLOPT_FORBID_REUSE',75);
define('CURLOPT_RANDOM_FILE',10076);
define('CURLOPT_EGDSOCKET',10077);
define('CURLOPT_CONNECTTIMEOUT',78);
define('CURLOPT_HEADERFUNCTION',20079);
define('CURLOPT_HTTPGET',80);
define('CURLOPT_SSL_VERIFYHOST',81);
define('CURLOPT_COOKIEJAR',10082);
define('CURLOPT_SSL_CIPHER_LIST',10083);
define('CURLOPT_HTTP_VERSION',84);
define('CURLOPT_FTP_USE_EPSV',85);
define('CURLOPT_SSLCERTTYPE',10086);
define('CURLOPT_SSLKEY',10087);
define('CURLOPT_SSLKEYTYPE',10088);
define('CURLOPT_SSLENGINE',10089);
define('CURLOPT_SSLENGINE_DEFAULT',90);
define('CURLOPT_DNS_USE_GLOBAL_CACHE',91);
define('CURLOPT_DNS_CACHE_TIMEOUT',92);
define('CURLOPT_PREQUOTE',10093);
define('CURLINFO_EFFECTIVE_URL',1);
define('CURLINFO_HTTP_CODE',2);
define('CURLINFO_FILETIME',14);
define('CURLINFO_TOTAL_TIME',3);
define('CURLINFO_NAMELOOKUP_TIME',4);
define('CURLINFO_CONNECT_TIME',5);
define('CURLINFO_PRETRANSFER_TIME',6);
define('CURLINFO_STARTTRANSFER_TIME',17);
define('CURLINFO_REDIRECT_TIME',19);
define('CURLINFO_REDIRECT_COUNT',20);
define('CURLINFO_SIZE_UPLOAD',7);
define('CURLINFO_SIZE_DOWNLOAD',8);
define('CURLINFO_SPEED_DOWNLOAD',9);
define('CURLINFO_SPEED_UPLOAD',10);
define('CURLINFO_HEADER_SIZE',11);
define('CURLINFO_REQUEST_SIZE',12);
define('CURLINFO_SSL_VERIFYRESULT',13);
define('CURLINFO_CONTENT_LENGTH_DOWNLOAD',15);
define('CURLINFO_CONTENT_LENGTH_UPLOAD',16);
define('CURLINFO_CONTENT_TYPE',18);
define("TIMECOND_ISUNMODSINCE",1);
define("TIMECOND_IFMODSINCE",2);
function _curlopt_name($curlopt) {
foreach (get_defined_constants() as $k=>$v) {
if ( (substr($k,0,8)=="CURLOPT_") && ($v==$curlopt)) return $k;
}
return false;
}
// Initialize a CURL emulation session
function curl_init($url=false) {
$i = $GLOBALS["_CURLEXT_OPT"]["index"]++;
$GLOBALS["_CURLEXT_OPT"][$i] = array("url"=>$url);
return $i;
}
// Set an option for a CURL emulation transfer
function curl_setopt($ch,$option,$value) {
$opt = &$GLOBALS["_CURLEXT_OPT"][$ch];
if (!$opt["args"]) $opt["args"] = array();
$args = &$opt["args"];
if (!$opt["settings"]) $opt["settings"] = array();
$settings = &$opt["settings"];
switch($option) {
case CURLOPT_URL:
$opt["url"] = $value;
break;
case CURLOPT_VERBOSE:
$opt["verbose"] = $value>0;
break;
case CURLOPT_USERPWD:
if ($value==="") $value = false;
$settings["user"] = $value;
break;
case CURLOPT_PROXYUSERPWD:
if ($value==="") $value = false;
$settings["proxy-user"] = $value;
break;
case CURLOPT_COOKIE:
if ($value==="") $value = false;
if ( is_bool($value) || (strpos($value,"=")!==false) ) $settings["cookie"] = $value;
break;
case CURLOPT_COOKIEFILE:
if ($value==="") $value = false;
$settings["cookie"] = $value;
break;
case CURLOPT_COOKIEJAR:
if ($value==="") $value = false;
$settings["cookie-jar"] = $value;
break;
case CURLOPT_CUSTOMREQUEST:
if ($value==="") $value = false;
$settings["request"] = $value;
break;
case CURLOPT_PROXY:
if ($value==="") $value = false;
$settings["proxy"] = $value;
break;
case CURLOPT_INTERFACE:
if ($value==="") $value = false;
$settings["interface"] = $value;
break;
case CURLOPT_KRB4LEVEL:
if ($value==="") $value = false;
$settings["krb4"] = $value;
break;
case CURLOPT_SSLCERT:
$pass = "";
if (is_string($settings["cert"])) {
list(,$pass) = explode(":",$settings["cert"]);
if (strlen($pass)) $pass = ":$pass";
}
$settings["cert"] = $value.$pass;
break;
case CURLOPT_SSLCERTPASSWD:
$filename = "";
if (is_string($settings["cert"])) {
list($filename,) = explode(":",$settings["cert"]);
}
$settings["cert"] = $filename.":".$value;
break;
case CURLOPT_RANGE:
if ($value==="") $value = false;
$settings["range"] = $value;
break;
case CURLOPT_REFERER:
if ($value==="") $value = false;
$settings["referer"] = $value;
break;
case CURLOPT_NOBODY:
$settings["head"] = $value>0;
break;
case CURLOPT_FAILONERROR:
$opt["fail_on_error"] = $value>0;
break;
case CURLOPT_USERAGENT:
$settings["user-agent"] = $value;
break;
case CURLOPT_HEADER:
$settings["include"] = $value>0;
break;
case CURLOPT_RETURNTRANSFER:
$opt["return_transfer"] = $value>0;
break;
case CURLOPT_TIMEOUT:
$settings["max-time"] = (int) $value;
break;
case CURLOPT_HTTPHEADER:
reset($value);
foreach ($value as $k=>$header) $args[] = "header=".$header;
break;
case CURLOPT_POST:
$settings["data"]["enabled"] = $value>0;
break;
case CURLOPT_POSTFIELDS:
if ($value==="") $value = false;
$settings["data"]["value"] = $value;
break;
case CURLOPT_SSL_VERIFYPEER:
$settings["insecure"] = ($value==0);
break;
case CURLOPT_SSL_VERIFYHOST:
// not supported by the commandline client
break;
case CURLOPT_FOLLOWLOCATION:
$settings["location"] = $value>0;
break;
case CURLOPT_PUT:
$settings["upload-file"]["enabled"] = $value>0;
break;
case CURLOPT_INFILE:
if ($value==="") $value = false;
if (is_resource($value)) {
// Ugh, this is a terrible hack. The CURL extension accepts a file handle, but
// the CURL binary obviously wants a filename. Since you can't derive a filename
// from a file handle, we have to make a copy of the file from the file handle,
// then pass the temporary filename to the CURL binary.
$tmpfilename = tempnam("/tmp","cif");
$fp = @fopen($tmpfilename,"w");
if (!$fp) {
trigger_error("CURL emulation library could not create a temporary file for CURLOPT_INFILE; upload aborted",E_USER_WARNING);
} else {
while (!feof($value)) {
$contents = fread($value,8192);
fwrite($fp,$contents);
}
fclose($fp);
// if a temporary file was previously created, unlink it
if ($settings["upload-file"]["value"] && file_exists($settings["upload-file"]["value"])) unlink($settings["upload-file"]["value"]);
// set the new upload-file filename
$settings["upload-file"]["value"] = $tmpfilename;
}
} else {
trigger_error("CURLOPT_INFILE must specify a valid file resource",E_USER_WARNING);
}
break;
case CURLOPT_MUTE:
// we're already mute, no?
break;
case CURLOPT_LOW_SPEED_LIMIT:
$settings["speed-limit"] = (int) $value;
break;
case CURLOPT_LOW_SPEED_TIME:
$settings["speed-time"] = (int) $value;
break;
case CURLOPT_RESUME_FROM:
$settings["continue-at"] = (int) $value;
break;
case CURLOPT_CAINFO:
if ($value==="") $value = false;
$settings["cacert"] = $value;
break;
case CURLOPT_SSLVERSION:
$value = (int) $value;
switch($value) {
case 2:
case 3:
unset($settings["sslv2"]);
unset($settings["sslv3"]);
$settings["sslv".$value] = true;
break;
}
break;
case CURLOPT_TIMECONDITION:
// untested - I'm lazy :)
if (!isset($settings["time-cond"]["enabled"])) $settings["time-cond"]["enabled"] = false;
if (!$settings["time-cond"]["value"]) $settings["time-cond"]["value"] = 1;
$settings["time-cond"]["value"] = abs($settings["time-cond"]["value"]);
if ($value==TIMECOND_ISUNMODSINCE) {
$settings["time-cond"]["value"] *= -1;
}
break;
case CURLOPT_TIMEVALUE:
// untested - I'm lazy :)
if ($settings["time-cond"]["value"]) {
$sign = $settings["time-cond"]["value"] / abs($settings["time-cond"]["value"]);
} else {
$sign = 1;
}
$settings["time-cond"]["value"] = (int) $value * $sign;
break;
case CURLOPT_FILE:
if (is_resource($value)) {
$opt["output_handle"] = $value;
} else {
trigger_error("CURLOPT_FILE must specify a valid file resource",E_USER_WARNING);
}
break;
case CURLOPT_WRITEHEADER:
if (is_resource($value)) {
$opt["header_handle"] = $value;
} else {
trigger_error("CURLOPT_WRITEHEADER must specify a valid file resource",E_USER_WARNING);
}
break;
case CURLOPT_STDERR:
// not implemented for now - not really relevant
break;
// FTP stuff not implemented
case CURLOPT_QUOTE:
case CURLOPT_POSTQUOTE:
case CURLOPT_UPLOAD:
case CURLOPT_FTPLISTONLY:
case CURLOPT_FTPAPPEND:
case CURLOPT_FTPPORT:
// Other stuff not implemented
case CURLOPT_NETRC:
default:
trigger_error("CURL emulation does not implement CURL option "._curlopt_name($option),E_USER_WARNING);
break;
}
}
// Perform a CURL emulation session
function curl_exec($ch) {
$opt = &$GLOBALS["_CURLEXT_OPT"][$ch];
$url = $opt["url"];
$verbose = $opt["verbose"];
// ask commandline CURL to return its statistics at the end of its output
$opt["settings"]["write-out"] = "%{http_code}|%{time_total}|%{time_namelookup}|%{time_connect}|%{time_pretransfer}|%{time_starttransfer}|%{size_download}|%{size_upload}|%{size_header}|%{size_request}|%{speed_download}|%{speed_upload}|||||||%{content_type}|%{url_effective}";
$writeout_order = array(
CURLINFO_HTTP_CODE,
CURLINFO_TOTAL_TIME,
CURLINFO_NAMELOOKUP_TIME,
CURLINFO_CONNECT_TIME,
CURLINFO_PRETRANSFER_TIME,
CURLINFO_STARTTRANSFER_TIME,
CURLINFO_SIZE_DOWNLOAD,
CURLINFO_SIZE_UPLOAD,
CURLINFO_HEADER_SIZE,
CURLINFO_REQUEST_SIZE,
CURLINFO_SPEED_DOWNLOAD,
CURLINFO_SPEED_UPLOAD,
// the following 5 items are not provided by commandline CURL, and thus are left empty
CURLINFO_FILETIME,
CURLINFO_REDIRECT_TIME,
CURLINFO_SSL_VERIFYRESULT,
CURLINFO_CONTENT_LENGTH_DOWNLOAD,
CURLINFO_CONTENT_LENGTH_UPLOAD,
CURLINFO_REDIRECT_COUNT,
CURLINFO_CONTENT_TYPE,
CURLINFO_EFFECTIVE_URL,
);
// if the CURLOPT_NOBODY option was specified (to remove the body from the output),
// but an output file handle was set, we need to tell CURL to return the body so
// that we can write it to the output handle and strip it from the output
if ($opt["settings"]["head"] && $opt["output_handle"]) {
unset($opt["settings"]["head"]);
$strip_body = true;
}
// if the CURLOPT_HEADER option was NOT specified, but a header file handle was
// specified, we again need to tell CURL to return the headers so we can write
// them, then strip them from the output
if (!isset($opt["settings"]["include"]) && isset($opt["header_handle"])) {
$opt["settings"]["include"] = true;
$strip_headers = true;
}
// build the CURL argument list
$arguments = "";
foreach ($opt["args"] as $k=>$arg) {
list($argname,$argval) = explode('=',$arg,2);
$arguments .= "--$argname ".escapeshellarg($argval)." ";
}
foreach ($opt["settings"] as $argname=>$argval) {
if (is_array($argval)) {
if (isset($argval["enabled"]) && !$argval["enabled"]) continue;
$argval = $argval["value"];
}
if ($argval===false) continue;
if (is_bool($argval)) $argval = "";
$arguments .= "--$argname ".escapeshellarg($argval)." ";
}
// build the CURL commandline and execute it
$cmd = CURL_PATH." ".$arguments." ".escapeshellarg($url);
if ($verbose) echo "libcurlemu: Executing: $cmd\n";
exec($cmd,$output,$ret);
if ($verbose) {
echo "libcurlemu: Result: ";
var_dump($output);
echo "libcurlemu: Exit code: $ret\n";
}
// check for errors
$opt["errno"] = $ret;
if ($ret) $opt["error"] = "CURL error #$ret";
// die if CURLOPT_FAILONERROR is set and the HTTP result code is greater than 300
if ($opt["fail_on_error"]) {
if (preg_match("/^HTTP\/1.[0-9]+ ([0-9]{3}) /",$output[0],$matches)) {
$resultcode = (int) $matches[1];
if ($resultcode>300) die;
} else {
die; // couldn't get result code!
}
}
// pull the statistics out from the output
$stats = explode('|',array_pop($output));
foreach ($writeout_order as $k=>$item) {
$opt["stats"][$item] = $stats[$k];
}
// build the response string
$output = implode("\r\n",$output);
// find the header end position if needed
if ($strip_headers || $strip_body || isset($opt["header_handle"])) {
$headerpos = strpos($output,"\r\n\r\n");
}
// if a file handle was provided for header output, extract the headers
// and write them to the handle
if (isset($opt["header_handle"])) {
$headers = substr($output,0,$headerpos);
fwrite($opt["header_handle"],$headers);
}
// if the caller did not request headers in the output, strip them
if ($strip_headers) {
$output = substr($output,$headerpos+4);
}
// if the caller did not request the response body in the output, strip it
if ($strip_body) {
if ($strip_headers) {
$body = $output;
$output = "";
} else {
$body = substr($output,$headerpos+4);
$output = substr($output,0,$headerpos);
}
}
// if a file handle was provided for output, write the output to it
if (isset($opt["output_handle"])) {
fwrite($opt["output_handle"],$output);
// if the caller requested that the response be returned, return it
} elseif ($opt["return_transfer"]) {
return $output;
// otherwise, just echo the output to stdout
} else {
echo $output;
}
return true;
}
function curl_close($ch) {
$opt = &$GLOBALS["_CURLEXT_OPT"][$ch];
if ($opt["settings"]) {
$settings = &$opt["settings"];
// if the user used CURLOPT_INFILE to specify a file to upload, remove the
// temporary file created for the CURL binary
if ($settings["upload-file"]["value"] && file_exists($settings["upload-file"]["value"])) unlink($settings["upload-file"]["value"]);
}
unset($GLOBALS["_CURLEXT_OPT"][$ch]);
}
function curl_errno($ch) {
return (int) $GLOBALS["_CURLEXT_OPT"][$ch]["errno"];
}
function curl_error($ch) {
return $GLOBALS["_CURLEXT_OPT"][$ch]["error"];
}
function curl_getinfo($ch,$opt=NULL) {
if ($opt) {
return $GLOBALS["_CURLEXT_OPT"][$ch]["stats"][$opt];
} else {
$curlinfo_tags = array(
"url"=>CURLINFO_EFFECTIVE_URL,
"content_type"=>CURLINFO_CONTENT_TYPE,
"http_code"=>CURLINFO_HTTP_CODE,
"header_size"=>CURLINFO_HEADER_SIZE,
"request_size"=>CURLINFO_REQUEST_SIZE,
"filetime"=>CURLINFO_FILETIME,
"ssl_verify_result"=>CURLINFO_SSL_VERIFYRESULT,
"redirect_count"=>CURLINFO_REDIRECT_COUNT,
"total_time"=>CURLINFO_TOTAL_TIME,
"namelookup_time"=>CURLINFO_NAMELOOKUP_TIME,
"connect_time"=>CURLINFO_CONNECT_TIME,
"pretransfer_time"=>CURLINFO_PRETRANSFER_TIME,
"size_upload"=>CURLINFO_SIZE_UPLOAD,
"size_download"=>CURLINFO_SIZE_DOWNLOAD,
"speed_download"=>CURLINFO_SPEED_DOWNLOAD,
"speed_upload"=>CURLINFO_SPEED_UPLOAD,
"download_content_length"=>CURLINFO_CONTENT_LENGTH_DOWNLOAD,
"upload_content_length"=>CURLINFO_CONTENT_LENGTH_UPLOAD,
"starttransfer_time"=>CURLINFO_STARTTRANSFER_TIME,
"redirect_time"=>CURLINFO_REDIRECT_TIME
);
$res = array();
foreach ($curlinfo_tags as $tag=>$opt) {
$res[$tag] = $GLOBALS["_CURLEXT_OPT"][$ch]["stats"][$opt];
}
return $res;
}
}
function curl_version() {
return "libcurlemu/".CURLEXT_VERSION."-ext";
}
}
?>

453
lib/libcurlemu/libcurlnative.inc.php Executable file
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<?php
/* CURL Extension Emulation Library (Native PHP)
* Copyright 2004-2005, Steve Blinch
* http://code.blitzaffe.com
* ============================================================================
*
* DESCRIPTION
*
* Provides a pure-PHP implementation of the PHP CURL extension, for use on
* systems which do not already have the CURL extension installed. It emulates
* all of the curl_* functions normally provided by the CURL extension itself,
* and uses an internal, native-PHP HTTP library to make requests.
*
* This library will automatically detect whether or not the "real" CURL
* extension is installed, and if so, it will not interfere. Thus, it can be
* used to ensure that, one way or another, the CURL functions are available
* for use.
*
* Note that this is only a *rough* emulation of CURL; it is not exact, and
* many of CURL's options are not implemented. For a more precise emulation of
* CURL, you may want to try our other libcurlexternal library which is based on
* the CURL console binary (and is virtually identical to the CURL extension).
*
*
* USAGE
*
* Please see the PHP documentation under the "CURL, Client URL Library
* Functions" section for information about using this library. Almost all of
* the documentation and examples in the PHP manual should work with this
* library.
*
*
* LICENSE
*
* This script is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This script 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this script; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// if the real CURL PHP extension is installed, exit without doing anything;
// if libcurlemu is installed and providing a wrapper for the CURL binary,
// exit without doing anything
if (!extension_loaded("curl") && !function_exists("curl_init")) {
// if the CURL binary was not found, do one of the following:
// - if CURLNAT_MISSING_ABORT was defined, then exit without
// implementing the CURL functions
// - otherwise, raise a fatal error and halt the script
if (!class_exists("HTTPRetriever")) {
if (is_readable(dirname(__FILE__)."/class_HTTPRetriever.php")) {
define("HTTPR_NO_REDECLARE_CURL",true);
require_once(dirname(__FILE__)."/class_HTTPRetriever.php");
} else {
if (defined("CURLNAT_MISSING_ABORT") && CURLNAT_MISSING_ABORT) {
return;
} else {
trigger_error("CURL extension is not loaded, libcurlemu is not loaded, and the HTTPRetriever class is unavailable",E_USER_ERROR);
}
}
}
define("CURLNAT_VERSION","1.0.0");
define('CURLOPT_NOTHING',0);
define('CURLOPT_FILE',10001);
define('CURLOPT_URL',10002);
define('CURLOPT_PORT',3);
define('CURLOPT_PROXY',10004);
define('CURLOPT_USERPWD',10005);
define('CURLOPT_PROXYUSERPWD',10006);
define('CURLOPT_RANGE',10007);
define('CURLOPT_INFILE',10009);
define('CURLOPT_ERRORBUFFER',10010);
define('CURLOPT_WRITEFUNCTION',20011);
define('CURLOPT_READFUNCTION',20012);
define('CURLOPT_TIMEOUT',13);
define('CURLOPT_INFILESIZE',14);
define('CURLOPT_POSTFIELDS',10015);
define('CURLOPT_REFERER',10016);
define('CURLOPT_FTPPORT',10017);
define('CURLOPT_USERAGENT',10018);
define('CURLOPT_LOW_SPEED_LIMIT',19);
define('CURLOPT_LOW_SPEED_TIME',20);
define('CURLOPT_RESUME_FROM',21);
define('CURLOPT_COOKIE',10022);
define('CURLOPT_HTTPHEADER',10023);
define('CURLOPT_HTTPPOST',10024);
define('CURLOPT_SSLCERT',10025);
define('CURLOPT_SSLCERTPASSWD',10026);
define('CURLOPT_SSLKEYPASSWD',10026);
define('CURLOPT_CRLF',27);
define('CURLOPT_QUOTE',10028);
define('CURLOPT_WRITEHEADER',10029);
define('CURLOPT_COOKIEFILE',10031);
define('CURLOPT_SSLVERSION',32);
define('CURLOPT_TIMECONDITION',33);
define('CURLOPT_TIMEVALUE',34);
define('CURLOPT_HTTPREQUEST',10035);
define('CURLOPT_CUSTOMREQUEST',10036);
define('CURLOPT_STDERR',10037);
define('CURLOPT_POSTQUOTE',10039);
define('CURLOPT_WRITEINFO',10040);
define('CURLOPT_VERBOSE',41);
define('CURLOPT_HEADER',42);
define('CURLOPT_NOPROGRESS',43);
define('CURLOPT_NOBODY',44);
define('CURLOPT_FAILONERROR',45);
define('CURLOPT_UPLOAD',46);
define('CURLOPT_POST',47);
define('CURLOPT_FTPLISTONLY',48);
define('CURLOPT_FTPAPPEND',50);
define('CURLOPT_NETRC',51);
define('CURLOPT_FOLLOWLOCATION',52);
define('CURLOPT_FTPASCII',53);
define('CURLOPT_TRANSFERTEXT',53);
define('CURLOPT_PUT',54);
define('CURLOPT_MUTE',55);
define('CURLOPT_PROGRESSFUNCTION',20056);
define('CURLOPT_PROGRESSDATA',10057);
define('CURLOPT_AUTOREFERER',58);
define('CURLOPT_PROXYPORT',59);
define('CURLOPT_POSTFIELDSIZE',60);
define('CURLOPT_HTTPPROXYTUNNEL',61);
define('CURLOPT_INTERFACE',10062);
define('CURLOPT_KRB4LEVEL',10063);
define('CURLOPT_SSL_VERIFYPEER',64);
define('CURLOPT_CAINFO',10065);
define('CURLOPT_PASSWDFUNCTION',20066);
define('CURLOPT_PASSWDDATA',10067);
define('CURLOPT_MAXREDIRS',68);
define('CURLOPT_FILETIME',10069);
define('CURLOPT_TELNETOPTIONS',10070);
define('CURLOPT_MAXCONNECTS',71);
define('CURLOPT_CLOSEPOLICY',72);
define('CURLOPT_CLOSEFUNCTION',20073);
define('CURLOPT_FRESH_CONNECT',74);
define('CURLOPT_FORBID_REUSE',75);
define('CURLOPT_RANDOM_FILE',10076);
define('CURLOPT_EGDSOCKET',10077);
define('CURLOPT_CONNECTTIMEOUT',78);
define('CURLOPT_HEADERFUNCTION',20079);
define('CURLOPT_HTTPGET',80);
define('CURLOPT_SSL_VERIFYHOST',81);
define('CURLOPT_COOKIEJAR',10082);
define('CURLOPT_SSL_CIPHER_LIST',10083);
define('CURLOPT_HTTP_VERSION',84);
define('CURLOPT_FTP_USE_EPSV',85);
define('CURLOPT_SSLCERTTYPE',10086);
define('CURLOPT_SSLKEY',10087);
define('CURLOPT_SSLKEYTYPE',10088);
define('CURLOPT_SSLENGINE',10089);
define('CURLOPT_SSLENGINE_DEFAULT',90);
define('CURLOPT_DNS_USE_GLOBAL_CACHE',91);
define('CURLOPT_DNS_CACHE_TIMEOUT',92);
define('CURLOPT_PREQUOTE',10093);
define('CURLINFO_EFFECTIVE_URL',1);
define('CURLINFO_HTTP_CODE',2);
define('CURLINFO_FILETIME',14);
define('CURLINFO_TOTAL_TIME',3);
define('CURLINFO_NAMELOOKUP_TIME',4);
define('CURLINFO_CONNECT_TIME',5);
define('CURLINFO_PRETRANSFER_TIME',6);
define('CURLINFO_STARTTRANSFER_TIME',17);
define('CURLINFO_REDIRECT_TIME',19);
define('CURLINFO_REDIRECT_COUNT',20);
define('CURLINFO_SIZE_UPLOAD',7);
define('CURLINFO_SIZE_DOWNLOAD',8);
define('CURLINFO_SPEED_DOWNLOAD',9);
define('CURLINFO_SPEED_UPLOAD',10);
define('CURLINFO_HEADER_SIZE',11);
define('CURLINFO_REQUEST_SIZE',12);
define('CURLINFO_SSL_VERIFYRESULT',13);
define('CURLINFO_CONTENT_LENGTH_DOWNLOAD',15);
define('CURLINFO_CONTENT_LENGTH_UPLOAD',16);
define('CURLINFO_CONTENT_TYPE',18);
define("TIMECOND_ISUNMODSINCE",1);
define("TIMECOND_IFMODSINCE",2);
function _curlopt_name($curlopt) {
foreach (get_defined_constants() as $k=>$v) {
if ( (substr($k,0,8)=="CURLOPT_") && ($v==$curlopt)) return $k;
}
return false;
}
// Initialize a CURL emulation session
function curl_init() {
$i = $GLOBALS["_CURLNAT_OPT"]["index"]++;
$GLOBALS["_CURLNAT_OPT"][$i] = array();
$GLOBALS["_CURLNAT_OPT"][$i]["http"] = &new HTTPRetriever();
$GLOBALS["_CURLNAT_OPT"][$i]["include_body"] = true;
return $i;
}
// Set an option for a CURL emulation transfer
function curl_setopt($ch,$option,$value) {
$opt = &$GLOBALS["_CURLNAT_OPT"][$ch];
if (!$opt["args"]) $opt["args"] = array();
$args = &$opt["args"];
if (!$opt["settings"]) $opt["settings"] = array();
$settings = &$opt["settings"];
$http = &$opt["http"];
switch($option) {
case CURLOPT_URL:
$opt["url"] = $value;
break;
case CURLOPT_CUSTOMREQUEST:
$opt["method"] = $value;
break;
case CURLOPT_REFERER:
$http->headers["Referer"] = $value;
break;
case CURLOPT_NOBODY:
$opt["include_body"] = $value==0;
break;
case CURLOPT_FAILONERROR:
$opt["fail_on_error"] = $value>0;
break;
case CURLOPT_USERAGENT:
$http->headers["User-Agent"] = $value;
break;
case CURLOPT_HEADER:
$opt["include_headers"] = $value>0;
break;
case CURLOPT_RETURNTRANSFER:
$opt["return_transfer"] = $value>0;
break;
case CURLOPT_TIMEOUT:
$opt["max-time"] = (int) $value;
break;
case CURLOPT_HTTPHEADER:
reset($value);
foreach ($value as $k=>$header) {
list($headername,$headervalue) = explode(":",$header);
$http->headers[$headername] = ltrim($headervalue);
}
break;
case CURLOPT_POST:
$opt["post"] = $value>0;
break;
case CURLOPT_POSTFIELDS:
$opt["postdata"] = $value;
break;
case CURLOPT_MUTE:
// we're already mute, no?
break;
case CURLOPT_FILE:
if (is_resource($value)) {
$opt["output_handle"] = $value;
} else {
trigger_error("CURLOPT_FILE must specify a valid file resource",E_USER_WARNING);
}
break;
case CURLOPT_WRITEHEADER:
if (is_resource($value)) {
$opt["header_handle"] = $value;
} else {
trigger_error("CURLOPT_WRITEHEADER must specify a valid file resource",E_USER_WARNING);
}
break;
case CURLOPT_STDERR:
// not implemented for now - not really relevant
break;
case CURLOPT_SSL_VERIFYPEER:
case CURLOPT_SSL_VERIFYHOST:
// these are automatically disabled using ssl:// anyway
break;
case CURLOPT_USERPWD:
list($curl_user,$curl_pass) = explode(':',$value,2);
$http->auth_username = $curl_user;
$http->auth_password = $curl_pass;
break;
// Important stuff not implemented (as it's not yet supported by HTTPRetriever)
case CURLOPT_PUT:
case CURLOPT_INFILE:
case CURLOPT_FOLLOWLOCATION:
case CURLOPT_PROXYUSERPWD:
case CURLOPT_COOKIE:
case CURLOPT_COOKIEFILE:
case CURLOPT_PROXY:
case CURLOPT_RANGE:
case CURLOPT_RESUME_FROM:
// Things that cannot (reasonably) be implemented here
case CURLOPT_LOW_SPEED_LIMIT:
case CURLOPT_LOW_SPEED_TIME:
case CURLOPT_KRB4LEVEL:
case CURLOPT_SSLCERT:
case CURLOPT_SSLCERTPASSWD:
case CURLOPT_SSLVERSION:
case CURLOPT_INTERFACE:
case CURLOPT_CAINFO:
case CURLOPT_TIMECONDITION:
case CURLOPT_TIMEVALUE:
// FTP stuff not implemented
case CURLOPT_QUOTE:
case CURLOPT_POSTQUOTE:
case CURLOPT_UPLOAD:
case CURLOPT_FTPLISTONLY:
case CURLOPT_FTPAPPEND:
case CURLOPT_FTPPORT:
// Other stuff not implemented
case CURLOPT_VERBOSE:
case CURLOPT_NETRC:
default:
trigger_error("CURL emulation does not implement CURL option "._curlopt_name($option),E_USER_WARNING);
break;
}
}
// Perform a CURL emulation session
function curl_exec($ch) {
$opt = &$GLOBALS["_CURLNAT_OPT"][$ch];
$url = $opt["url"];
$http = &$opt["http"];
$http->disable_curl = true; // avoid problems with recursion, since we *ARE* CURL
// set time limits if requested
if ($opt["max-time"]) {
$http->connect_timeout = $opt["max-time"];
$http->max_time = $opt["max-time"];
}
if ($opt["post"]) {
$res = $http->post($url,$opt["postdata"]);
} elseif ($opt["method"]) {
$res = $http->custom($opt["method"],$url,$opt["postdata"]);
} else {
$res = $http->get($url);
}
// check for errors
$opt["errno"] = (!$res && $http->error) ? 1 : 0;
if ($opt["errno"]) $opt["error"] = $http->error;
// die if CURLOPT_FAILONERROR is set and the HTTP result code is greater than 300
if ($opt["fail_on_error"]) {
if ($http->result_code>300) die;
}
$opt["stats"] = $http->stats;
$headers = "";
foreach ($http->response_headers as $k=>$v) {
$headers .= "$k: $v\r\n";
}
// if a file handle was provided for header output, extract the headers
// and write them to the handle
if (isset($opt["header_handle"])) {
fwrite($opt["header_handle"],$headers);
}
$output = ($opt["include_headers"] ? $headers."\r\n" : "") . ($opt["include_body"] ? $http->response : "");
// if a file handle was provided for output, write the output to it
if (isset($opt["output_handle"])) {
fwrite($opt["output_handle"],$output);
// if the caller requested that the response be returned, return it
} elseif ($opt["return_transfer"]) {
return $output;
// otherwise, just echo the output to stdout
} else {
echo $output;
}
return true;
}
function curl_close($ch) {
$opt = &$GLOBALS["_CURLNAT_OPT"][$ch];
if ($opt["settings"]) {
$settings = &$opt["settings"];
// if the user used CURLOPT_INFILE to specify a file to upload, remove the
// temporary file created for the CURL binary
if ($settings["upload-file"]["value"] && file_exists($settings["upload-file"]["value"])) unlink($settings["upload-file"]["value"]);
}
unset($GLOBALS["_CURLNAT_OPT"][$ch]);
}
function curl_errno($ch) {
return (int) $GLOBALS["_CURLNAT_OPT"][$ch]["errno"];
}
function curl_error($ch) {
return $GLOBALS["_CURLNAT_OPT"][$ch]["error"];
}
function curl_getinfo($ch,$opt=NULL) {
if ($opt) {
$curlinfo_tags = array(
CURLINFO_EFFECTIVE_URL=>"url",
CURLINFO_CONTENT_TYPE=>"content_type",
CURLINFO_HTTP_CODE=>"http_code",
CURLINFO_HEADER_SIZE=>"header_size",
CURLINFO_REQUEST_SIZE=>"request_size",
CURLINFO_FILETIME=>"filetime",
CURLINFO_SSL_VERIFYRESULT=>"ssl_verify_result",
CURLINFO_REDIRECT_COUNT=>"redirect_count",
CURLINFO_TOTAL_TIME=>"total_time",
CURLINFO_NAMELOOKUP_TIME=>"namelookup_time",
CURLINFO_CONNECT_TIME=>"connect_time",
CURLINFO_PRETRANSFER_TIME=>"pretransfer_time",
CURLINFO_SIZE_UPLOAD=>"size_upload",
CURLINFO_SIZE_DOWNLOAD=>"size_download",
CURLINFO_SPEED_DOWNLOAD=>"speed_download",
CURLINFO_SPEED_UPLOAD=>"speed_upload",
CURLINFO_CONTENT_LENGTH_DOWNLOAD=>"download_content_length",
CURLINFO_CONTENT_LENGTH_UPLOAD=>"upload_content_length",
CURLINFO_STARTTRANSFER_TIME=>"starttransfer_time",
CURLINFO_REDIRECT_TIME=>"redirect_time"
);
$key = $curlinfo_tags[$opt];
return $GLOBALS["_CURLNAT_OPT"][$ch]["stats"][$key];
} else {
return $GLOBALS["_CURLNAT_OPT"][$ch]["stats"];
}
}
function curl_version() {
return "libcurlemu/".CURLNAT_VERSION."-nat";
}
}
?>

7
lib/libcurlemu/readme_moodle.txt Normal file
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@ -0,0 +1,7 @@
Description of libcurlemu v1.0.3 import into Moodle
Changes:
* example.php - removed
* original HTTPRetriever v1.1.5 replaced by standalone package v1.1.9
$Id$