453 lines
14 KiB
PHP
453 lines
14 KiB
PHP
<?php
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/* CURL Extension Emulation Library (Native PHP)
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* Copyright 2004-2007, Steve Blinch
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* http://code.blitzaffe.com
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* ============================================================================
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*
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* DESCRIPTION
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*
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* Provides a pure-PHP implementation of the PHP CURL extension, for use on
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* systems which do not already have the CURL extension installed. It emulates
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* all of the curl_* functions normally provided by the CURL extension itself,
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* and uses an internal, native-PHP HTTP library to make requests.
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*
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* This library will automatically detect whether or not the "real" CURL
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* extension is installed, and if so, it will not interfere. Thus, it can be
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* used to ensure that, one way or another, the CURL functions are available
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* for use.
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*
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* Note that this is only a *rough* emulation of CURL; it is not exact, and
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* many of CURL's options are not implemented. For a more precise emulation of
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* CURL, you may want to try our other libcurlexternal library which is based on
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* the CURL console binary (and is virtually identical to the CURL extension).
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*
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*
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* USAGE
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*
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* Please see the PHP documentation under the "CURL, Client URL Library
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* Functions" section for information about using this library. Almost all of
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* the documentation and examples in the PHP manual should work with this
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* library.
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*
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*
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* LICENSE
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*
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* This script is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This script is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this script; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// if the real CURL PHP extension is installed, exit without doing anything;
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// if libcurlemu is installed and providing a wrapper for the CURL binary,
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// exit without doing anything
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if (!extension_loaded("curl") && !function_exists("curl_init")) {
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// if the CURL binary was not found, do one of the following:
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// - if CURLNAT_MISSING_ABORT was defined, then exit without
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// implementing the CURL functions
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// - otherwise, raise a fatal error and halt the script
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if (!class_exists("HTTPRetriever")) {
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if (is_readable(dirname(__FILE__)."/class_HTTPRetriever.php")) {
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define("HTTPR_NO_REDECLARE_CURL",true);
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require_once(dirname(__FILE__)."/class_HTTPRetriever.php");
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} else {
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if (defined("CURLNAT_MISSING_ABORT") && CURLNAT_MISSING_ABORT) {
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return;
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} else {
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trigger_error("CURL extension is not loaded, libcurlemu is not loaded, and the HTTPRetriever class is unavailable",E_USER_ERROR);
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}
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}
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}
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define("CURLNAT_VERSION","1.0.0");
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define('CURLOPT_NOTHING',0);
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define('CURLOPT_FILE',10001);
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define('CURLOPT_URL',10002);
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define('CURLOPT_PORT',3);
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define('CURLOPT_PROXY',10004);
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define('CURLOPT_USERPWD',10005);
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define('CURLOPT_PROXYUSERPWD',10006);
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define('CURLOPT_RANGE',10007);
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define('CURLOPT_INFILE',10009);
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define('CURLOPT_ERRORBUFFER',10010);
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define('CURLOPT_WRITEFUNCTION',20011);
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define('CURLOPT_READFUNCTION',20012);
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define('CURLOPT_TIMEOUT',13);
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define('CURLOPT_INFILESIZE',14);
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define('CURLOPT_POSTFIELDS',10015);
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define('CURLOPT_REFERER',10016);
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define('CURLOPT_FTPPORT',10017);
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define('CURLOPT_USERAGENT',10018);
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define('CURLOPT_LOW_SPEED_LIMIT',19);
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define('CURLOPT_LOW_SPEED_TIME',20);
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define('CURLOPT_RESUME_FROM',21);
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define('CURLOPT_COOKIE',10022);
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define('CURLOPT_HTTPHEADER',10023);
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define('CURLOPT_HTTPPOST',10024);
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define('CURLOPT_SSLCERT',10025);
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define('CURLOPT_SSLCERTPASSWD',10026);
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define('CURLOPT_SSLKEYPASSWD',10026);
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define('CURLOPT_CRLF',27);
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define('CURLOPT_QUOTE',10028);
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define('CURLOPT_WRITEHEADER',10029);
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define('CURLOPT_COOKIEFILE',10031);
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define('CURLOPT_SSLVERSION',32);
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define('CURLOPT_TIMECONDITION',33);
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define('CURLOPT_TIMEVALUE',34);
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define('CURLOPT_HTTPREQUEST',10035);
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define('CURLOPT_CUSTOMREQUEST',10036);
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define('CURLOPT_STDERR',10037);
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define('CURLOPT_POSTQUOTE',10039);
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define('CURLOPT_WRITEINFO',10040);
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define('CURLOPT_VERBOSE',41);
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define('CURLOPT_HEADER',42);
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define('CURLOPT_NOPROGRESS',43);
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define('CURLOPT_NOBODY',44);
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define('CURLOPT_FAILONERROR',45);
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define('CURLOPT_UPLOAD',46);
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define('CURLOPT_POST',47);
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define('CURLOPT_FTPLISTONLY',48);
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define('CURLOPT_FTPAPPEND',50);
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define('CURLOPT_NETRC',51);
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define('CURLOPT_FOLLOWLOCATION',52);
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define('CURLOPT_FTPASCII',53);
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define('CURLOPT_TRANSFERTEXT',53);
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define('CURLOPT_PUT',54);
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define('CURLOPT_MUTE',55);
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define('CURLOPT_PROGRESSFUNCTION',20056);
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define('CURLOPT_PROGRESSDATA',10057);
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define('CURLOPT_AUTOREFERER',58);
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define('CURLOPT_PROXYPORT',59);
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define('CURLOPT_POSTFIELDSIZE',60);
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define('CURLOPT_HTTPPROXYTUNNEL',61);
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define('CURLOPT_INTERFACE',10062);
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define('CURLOPT_KRB4LEVEL',10063);
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define('CURLOPT_SSL_VERIFYPEER',64);
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define('CURLOPT_CAINFO',10065);
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define('CURLOPT_PASSWDFUNCTION',20066);
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define('CURLOPT_PASSWDDATA',10067);
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define('CURLOPT_MAXREDIRS',68);
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define('CURLOPT_FILETIME',10069);
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define('CURLOPT_TELNETOPTIONS',10070);
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define('CURLOPT_MAXCONNECTS',71);
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define('CURLOPT_CLOSEPOLICY',72);
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define('CURLOPT_CLOSEFUNCTION',20073);
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define('CURLOPT_FRESH_CONNECT',74);
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define('CURLOPT_FORBID_REUSE',75);
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define('CURLOPT_RANDOM_FILE',10076);
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define('CURLOPT_EGDSOCKET',10077);
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define('CURLOPT_CONNECTTIMEOUT',78);
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define('CURLOPT_HEADERFUNCTION',20079);
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define('CURLOPT_HTTPGET',80);
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define('CURLOPT_SSL_VERIFYHOST',81);
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define('CURLOPT_COOKIEJAR',10082);
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define('CURLOPT_SSL_CIPHER_LIST',10083);
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define('CURLOPT_HTTP_VERSION',84);
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define('CURLOPT_FTP_USE_EPSV',85);
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define('CURLOPT_SSLCERTTYPE',10086);
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define('CURLOPT_SSLKEY',10087);
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define('CURLOPT_SSLKEYTYPE',10088);
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define('CURLOPT_SSLENGINE',10089);
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define('CURLOPT_SSLENGINE_DEFAULT',90);
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define('CURLOPT_DNS_USE_GLOBAL_CACHE',91);
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define('CURLOPT_DNS_CACHE_TIMEOUT',92);
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define('CURLOPT_PREQUOTE',10093);
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define('CURLINFO_EFFECTIVE_URL',1);
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define('CURLINFO_HTTP_CODE',2);
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define('CURLINFO_FILETIME',14);
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define('CURLINFO_TOTAL_TIME',3);
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define('CURLINFO_NAMELOOKUP_TIME',4);
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define('CURLINFO_CONNECT_TIME',5);
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define('CURLINFO_PRETRANSFER_TIME',6);
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define('CURLINFO_STARTTRANSFER_TIME',17);
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define('CURLINFO_REDIRECT_TIME',19);
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define('CURLINFO_REDIRECT_COUNT',20);
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define('CURLINFO_SIZE_UPLOAD',7);
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define('CURLINFO_SIZE_DOWNLOAD',8);
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define('CURLINFO_SPEED_DOWNLOAD',9);
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define('CURLINFO_SPEED_UPLOAD',10);
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define('CURLINFO_HEADER_SIZE',11);
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define('CURLINFO_REQUEST_SIZE',12);
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define('CURLINFO_SSL_VERIFYRESULT',13);
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define('CURLINFO_CONTENT_LENGTH_DOWNLOAD',15);
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define('CURLINFO_CONTENT_LENGTH_UPLOAD',16);
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define('CURLINFO_CONTENT_TYPE',18);
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define("TIMECOND_ISUNMODSINCE",1);
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define("TIMECOND_IFMODSINCE",2);
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function _curlopt_name($curlopt) {
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foreach (get_defined_constants() as $k=>$v) {
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if ( (substr($k,0,8)=="CURLOPT_") && ($v==$curlopt)) return $k;
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}
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return false;
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}
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// Initialize a CURL emulation session
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function curl_init() {
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$i = $GLOBALS["_CURLNAT_OPT"]["index"]++;
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$GLOBALS["_CURLNAT_OPT"][$i] = array();
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$GLOBALS["_CURLNAT_OPT"][$i]["http"] = &new HTTPRetriever();
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$GLOBALS["_CURLNAT_OPT"][$i]["include_body"] = true;
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return $i;
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}
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// Set an option for a CURL emulation transfer
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function curl_setopt($ch,$option,$value) {
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$opt = &$GLOBALS["_CURLNAT_OPT"][$ch];
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if (!$opt["args"]) $opt["args"] = array();
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$args = &$opt["args"];
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if (!$opt["settings"]) $opt["settings"] = array();
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$settings = &$opt["settings"];
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$http = &$opt["http"];
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switch($option) {
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case CURLOPT_URL:
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$opt["url"] = $value;
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break;
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case CURLOPT_CUSTOMREQUEST:
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$opt["method"] = $value;
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break;
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case CURLOPT_REFERER:
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$http->headers["Referer"] = $value;
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break;
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case CURLOPT_NOBODY:
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$opt["include_body"] = $value==0;
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break;
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case CURLOPT_FAILONERROR:
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$opt["fail_on_error"] = $value>0;
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break;
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case CURLOPT_USERAGENT:
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$http->headers["User-Agent"] = $value;
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break;
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case CURLOPT_HEADER:
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$opt["include_headers"] = $value>0;
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break;
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case CURLOPT_RETURNTRANSFER:
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$opt["return_transfer"] = $value>0;
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break;
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case CURLOPT_TIMEOUT:
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$opt["max-time"] = (int) $value;
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break;
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case CURLOPT_HTTPHEADER:
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reset($value);
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foreach ($value as $k=>$header) {
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list($headername,$headervalue) = explode(":",$header);
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$http->headers[$headername] = ltrim($headervalue);
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}
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break;
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case CURLOPT_POST:
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$opt["post"] = $value>0;
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break;
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case CURLOPT_POSTFIELDS:
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$opt["postdata"] = $value;
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break;
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case CURLOPT_MUTE:
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// we're already mute, no?
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break;
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case CURLOPT_FILE:
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if (is_resource($value)) {
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$opt["output_handle"] = $value;
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} else {
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trigger_error("CURLOPT_FILE must specify a valid file resource",E_USER_WARNING);
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}
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break;
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case CURLOPT_WRITEHEADER:
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if (is_resource($value)) {
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$opt["header_handle"] = $value;
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} else {
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trigger_error("CURLOPT_WRITEHEADER must specify a valid file resource",E_USER_WARNING);
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}
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break;
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case CURLOPT_STDERR:
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// not implemented for now - not really relevant
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break;
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case CURLOPT_SSL_VERIFYPEER:
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case CURLOPT_SSL_VERIFYHOST:
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// these are automatically disabled using ssl:// anyway
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break;
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case CURLOPT_USERPWD:
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list($curl_user,$curl_pass) = explode(':',$value,2);
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$http->auth_username = $curl_user;
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$http->auth_password = $curl_pass;
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break;
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// Important stuff not implemented (as it's not yet supported by HTTPRetriever)
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case CURLOPT_PUT:
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case CURLOPT_INFILE:
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case CURLOPT_FOLLOWLOCATION:
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case CURLOPT_PROXYUSERPWD:
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case CURLOPT_COOKIE:
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case CURLOPT_COOKIEFILE:
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case CURLOPT_PROXY:
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case CURLOPT_RANGE:
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case CURLOPT_RESUME_FROM:
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// Things that cannot (reasonably) be implemented here
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case CURLOPT_LOW_SPEED_LIMIT:
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case CURLOPT_LOW_SPEED_TIME:
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case CURLOPT_KRB4LEVEL:
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case CURLOPT_SSLCERT:
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case CURLOPT_SSLCERTPASSWD:
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case CURLOPT_SSLVERSION:
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case CURLOPT_INTERFACE:
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case CURLOPT_CAINFO:
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case CURLOPT_TIMECONDITION:
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case CURLOPT_TIMEVALUE:
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// FTP stuff not implemented
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case CURLOPT_QUOTE:
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case CURLOPT_POSTQUOTE:
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case CURLOPT_UPLOAD:
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case CURLOPT_FTPLISTONLY:
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case CURLOPT_FTPAPPEND:
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case CURLOPT_FTPPORT:
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// Other stuff not implemented
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case CURLOPT_VERBOSE:
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case CURLOPT_NETRC:
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default:
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trigger_error("CURL emulation does not implement CURL option "._curlopt_name($option),E_USER_WARNING);
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break;
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}
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}
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// Perform a CURL emulation session
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function curl_exec($ch) {
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$opt = &$GLOBALS["_CURLNAT_OPT"][$ch];
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$url = $opt["url"];
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$http = &$opt["http"];
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$http->disable_curl = true; // avoid problems with recursion, since we *ARE* CURL
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// set time limits if requested
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if ($opt["max-time"]) {
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$http->connect_timeout = $opt["max-time"];
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$http->max_time = $opt["max-time"];
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}
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if ($opt["post"]) {
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$res = $http->post($url,$opt["postdata"]);
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} elseif ($opt["method"]) {
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$res = $http->custom($opt["method"],$url,$opt["postdata"]);
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} else {
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$res = $http->get($url);
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}
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// check for errors
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$opt["errno"] = (!$res && $http->error) ? 1 : 0;
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if ($opt["errno"]) $opt["error"] = $http->error;
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// die if CURLOPT_FAILONERROR is set and the HTTP result code is greater than 300
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if ($opt["fail_on_error"]) {
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if ($http->result_code>300) die;
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}
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$opt["stats"] = $http->stats;
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$headers = "";
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foreach ($http->response_headers as $k=>$v) {
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$headers .= "$k: $v\r\n";
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}
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// if a file handle was provided for header output, extract the headers
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// and write them to the handle
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if (isset($opt["header_handle"])) {
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fwrite($opt["header_handle"],$headers);
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}
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$output = ($opt["include_headers"] ? $headers."\r\n" : "") . ($opt["include_body"] ? $http->response : "");
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// if a file handle was provided for output, write the output to it
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if (isset($opt["output_handle"])) {
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fwrite($opt["output_handle"],$output);
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// if the caller requested that the response be returned, return it
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} elseif ($opt["return_transfer"]) {
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return $output;
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// otherwise, just echo the output to stdout
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} else {
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echo $output;
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}
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return true;
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}
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function curl_close($ch) {
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$opt = &$GLOBALS["_CURLNAT_OPT"][$ch];
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if ($opt["settings"]) {
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$settings = &$opt["settings"];
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// if the user used CURLOPT_INFILE to specify a file to upload, remove the
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// temporary file created for the CURL binary
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if ($settings["upload-file"]["value"] && file_exists($settings["upload-file"]["value"])) unlink($settings["upload-file"]["value"]);
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}
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unset($GLOBALS["_CURLNAT_OPT"][$ch]);
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}
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function curl_errno($ch) {
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return (int) $GLOBALS["_CURLNAT_OPT"][$ch]["errno"];
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}
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function curl_error($ch) {
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return $GLOBALS["_CURLNAT_OPT"][$ch]["error"];
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}
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function curl_getinfo($ch,$opt=NULL) {
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if ($opt) {
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$curlinfo_tags = array(
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CURLINFO_EFFECTIVE_URL=>"url",
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CURLINFO_CONTENT_TYPE=>"content_type",
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CURLINFO_HTTP_CODE=>"http_code",
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CURLINFO_HEADER_SIZE=>"header_size",
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CURLINFO_REQUEST_SIZE=>"request_size",
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CURLINFO_FILETIME=>"filetime",
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CURLINFO_SSL_VERIFYRESULT=>"ssl_verify_result",
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CURLINFO_REDIRECT_COUNT=>"redirect_count",
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CURLINFO_TOTAL_TIME=>"total_time",
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CURLINFO_NAMELOOKUP_TIME=>"namelookup_time",
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CURLINFO_CONNECT_TIME=>"connect_time",
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CURLINFO_PRETRANSFER_TIME=>"pretransfer_time",
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CURLINFO_SIZE_UPLOAD=>"size_upload",
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CURLINFO_SIZE_DOWNLOAD=>"size_download",
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CURLINFO_SPEED_DOWNLOAD=>"speed_download",
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CURLINFO_SPEED_UPLOAD=>"speed_upload",
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CURLINFO_CONTENT_LENGTH_DOWNLOAD=>"download_content_length",
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CURLINFO_CONTENT_LENGTH_UPLOAD=>"upload_content_length",
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CURLINFO_STARTTRANSFER_TIME=>"starttransfer_time",
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CURLINFO_REDIRECT_TIME=>"redirect_time"
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);
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$key = $curlinfo_tags[$opt];
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return $GLOBALS["_CURLNAT_OPT"][$ch]["stats"][$key];
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} else {
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return $GLOBALS["_CURLNAT_OPT"][$ch]["stats"];
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}
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}
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function curl_version() {
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return "libcurlemu/".CURLNAT_VERSION."-nat";
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}
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}
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?>
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