http.cxx

pwlib源码库

/*
 * http.cxx
 *
 * HTTP ancestor class and common classes.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-2002 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: http.cxx,v $
 * Revision 1.115  2005/04/20 05:19:48  csoutheren
 * Patch 1185334. Ensure SIP URLs correctly store status of port
 * Thanks to Ted Szoczei
 *
 * Revision 1.114  2005/01/16 20:36:48  csoutheren
 * Changed URLS to put IP address in [] if contains a ":"
 *
 * Revision 1.113  2005/01/04 08:09:41  csoutheren
 * Fixed Linux configure problems
 *
 * Revision 1.112  2004/12/08 00:51:12  csoutheren
 * Move PURLLegacyScheme to header file to allow external usage
 *
 * Revision 1.111  2004/10/23 11:27:24  ykiryanov
 * Added ifdef _WIN32_WCE for PocketPC 2003 SDK port
 *
 * Revision 1.110  2004/08/31 23:40:51  csoutheren
 * Fixed problem with absolute file paths in URLs
 *
 * Revision 1.109  2004/07/14 13:15:45  rjongbloed
 * Fixed minor bug where a URL is "non-empty" if requires a host but has none.
 *   eg could end up with "sip:" or "http://:80" which are illegal.
 *
 * Revision 1.108  2004/07/12 09:17:20  csoutheren
 * Fixed warnings and errors under Linux
 *
 * Revision 1.107  2004/07/06 10:12:52  csoutheren
 * Added static integer o factory template to assist in ensuring factories are instantiated
 *
 * Revision 1.106  2004/06/30 12:17:05  rjongbloed
 * Rewrite of plug in system to use single global variable for all factories to avoid all sorts
 *   of issues with startup orders and Windows DLL multiple instances.
 *
 * Revision 1.105  2004/06/16 07:48:12  csoutheren
 * Added assert to clarify usage of default scheme
 *
 * Revision 1.104  2004/06/03 13:30:58  csoutheren
 * Renamed INSTANTIATE_FACTORY to avoid potential namespace collisions
 * Added documentaton on new PINSTANTIATE_FACTORY macro
 * Added generic form of PINSTANTIATE_FACTORY
 *
 * Revision 1.103  2004/06/03 12:47:58  csoutheren
 * Decomposed PFactory declarations to hopefully avoid problems with Windows DLLs
 *
 * Revision 1.102  2004/06/01 07:28:45  csoutheren
 * Changed URL parsing to use abstract factory code
 *
 * Revision 1.101  2004/04/04 00:21:47  csoutheren
 * FIxed problem with some URL parsing
 *
 * Revision 1.100  2004/04/03 08:22:20  csoutheren
 * Remove pseudo-RTTI and replaced with real RTTI
 *
 * Revision 1.99  2004/03/23 05:08:21  csoutheren
 * Fixed problem with use of ShellExecuteEx function
 *
 * Revision 1.98  2004/03/13 06:30:52  rjongbloed
 * Virtualised parse function.
 *
 * Revision 1.97  2004/02/24 11:14:44  rjongbloed
 * Fixed correct initialisation of some internal variables in URL if parse fails.
 *
 * Revision 1.96  2004/01/17 17:44:17  csoutheren
 * Changed to use PString::MakeEmpty
 *
 * Revision 1.95  2003/11/18 09:22:17  csoutheren
 * Fixed problems with PURL::OpenBrowser, thanks to David Parr
 *
 * Revision 1.94  2003/08/27 03:37:45  dereksmithies
 * Fix initialization of pathStr so it really is empty. BIG thanks to Diego Tartara.
 *
 * Revision 1.93  2003/07/22 03:26:10  csoutheren
 * Fixed problem with parsing default H323 addresses
 *
 * Revision 1.92  2003/06/23 15:31:40  ykiryanov
 * Slightly changed call to ShellExecuteEx to make compatible with Win32
 *
 * Revision 1.91  2003/06/23 14:31:33  ykiryanov
 * Modified for WinCE - used ShellExecuteEx instead of ShellExecute
 *
 * Revision 1.90  2003/06/05 00:15:54  rjongbloed
 * Fixed callto bug created by previous patch.
 *
 * Revision 1.89  2003/06/04 01:42:05  rjongbloed
 * Fixed h323 scheme, does not have a "password" field.
 *
 * Revision 1.88  2003/06/02 02:46:45  rjongbloed
 * Fixed issue with callto URL parsing incorrect username field.
 * Added automatic removal of illegal (though common) "//" in callto URL.
 *
 * Revision 1.87  2003/05/05 07:30:17  craigs
 * Fixed problem with URLs that do not specify schemes
 *
 * Revision 1.86  2003/05/02 13:50:23  craigs
 * Fixed a problem with callto:localhost
 *
 * Revision 1.85  2003/05/02 13:20:33  craigs
 * Fixed callto problems
 *
 * Revision 1.84  2003/04/28 04:41:22  robertj
 * Changed URL parsing so if a default scheme is present then explicit scheme
 *   must be "known" to avoid ambiguity with host:port parsing.
 *
 * Revision 1.83  2003/04/10 00:13:56  robertj
 * Fixed correct decoding of user/password/host/port field, for non h323 schemes.
 *
 * Revision 1.82  2003/04/08 06:28:14  craigs
 * Fixed introduced problem with HTTP server mistaking relative URLs for proxy requests
 *
 * Revision 1.81  2003/04/04 08:03:55  robertj
 * Fixed special case of h323 URL default port changing depending on
 *   if it the host is an endpoint or gatekeeper.
 *
 * Revision 1.80  2003/04/04 05:18:08  robertj
 * Added "callto", "tel" and fixed "h323" URL types.
 *
 * Revision 1.79  2002/12/02 00:17:03  robertj
 * Fixed URL parsing/display problems with non-path URL type eg mailto
 *
 * Revision 1.78  2002/11/22 06:16:49  robertj
 * Fixed usage of URI (relative http/https URL).
 *
 * Revision 1.77  2002/11/20 02:10:56  robertj
 * Fixed some more realtive/absolute path issues.
 *
 * Revision 1.76  2002/11/20 01:01:49  robertj
 * Fixed GNU compatibility
 *
 * Revision 1.75  2002/11/20 00:49:37  robertj
 * Fixed correct interpretation of url re double slashes as per latest RFC,
 *   including file: mapping and relative paths. Probably still more to do.
 *
 * Revision 1.74  2002/11/19 22:45:03  robertj
 * Fixed support for file: scheme under unix
 *
 * Revision 1.73  2002/11/19 10:36:50  robertj
 * Added functions to set anf get "file:" URL. as PFilePath and do the right
 *   things with platform dependent directory components.
 *
 * Revision 1.72  2002/11/06 22:47:25  robertj
 * Fixed header comment (copyright etc)
 *
 * Revision 1.71  2002/09/23 07:17:24  robertj
 * Changes to allow winsock2 to be included.
 *
 * Revision 1.70  2002/08/28 08:06:11  craigs
 * Fixed problem (again) with file:// URLs
 *
 * Revision 1.69  2002/08/28 05:11:23  craigs
 * Fixed problem with file:// URLs
 *
 * Revision 1.68  2002/05/02 05:11:29  craigs
 * Fixed problem with not translating + chars in URL query parameters
 *
 * Revision 1.67  2002/03/19 23:39:57  robertj
 * Fixed string output to include PathOnly variant, lost in previous mod.
 *
 * Revision 1.66  2002/03/19 23:24:08  robertj
 * Fixed problems with backward compatibility on parameters processing.
 *
 * Revision 1.65  2002/03/18 05:02:27  robertj
 * Added functions to set component parts of URL.
 * Fixed output of parameters when more than one ';' involved.
 *
 * Revision 1.64  2001/11/09 05:46:14  robertj
 * Removed double slash on sip URL.
 * Fixed extra : if have username but no password.
 * Added h323: scheme
 *
 * Revision 1.63  2001/11/08 00:32:49  robertj
 * Added parsing of ';' based parameter fields into string dictionary if there are multiple parameters, with '=' values.
 *
 * Revision 1.62  2001/10/31 01:33:07  robertj
 * Added extra const for constant HTTP tag name strings.
 *
 * Revision 1.61  2001/10/03 00:26:34  robertj
 * Upgraded client to HTTP/1.1 and for chunked mode entity bodies.
 *
 * Revision 1.60  2001/09/28 00:45:42  robertj
 * Broke out internal static function for unstranslating URL strings.
 *
 * Revision 1.59  2001/07/16 00:43:06  craigs
 * Added ability to parse other transport URLs
 *
 * Revision 1.58  2000/05/02 08:29:07  craigs
 * Removed "memory leaks" caused by brain-dead GNU linker
 *
 * Revision 1.57  1999/05/11 12:24:18  robertj
 * Fixed URL parser so leading blanks are ignored.
 *
 * Revision 1.56  1999/05/04 15:26:01  robertj
 * Improved HTTP/1.1 compatibility (pass through user commands).
 * Fixed problems with quicktime installer.
 *
 * Revision 1.55  1999/04/21 01:56:13  robertj
 * Fixed problem with escape codes greater that %80
 *
 * Revision 1.54  1999/01/16 12:45:54  robertj
 * Added RTSP schemes to URL's
 *
 * Revision 1.53  1998/11/30 05:38:15  robertj
 * Moved PURL::Open() code to .cxx file to avoid linking unused code.
 *
 * Revision 1.52  1998/11/30 04:51:53  robertj
 * New directory structure
 *
 * Revision 1.51  1998/09/23 06:22:07  robertj
 * Added open source copyright license.
 *
 * Revision 1.50  1998/02/03 10:02:34  robertj
 * Added ability to get scheme, host and port from URL as a string.
 *
 * Revision 1.49  1998/02/03 06:27:26  robertj
 * Fixed URL encoding to be closer to RFC
 *
 * Revision 1.48  1998/01/26 02:49:16  robertj
 * GNU support.
 *
 * Revision 1.47  1997/11/10 12:40:20  robertj
 * Fixed illegal character set for URL's.
 *
 * Revision 1.46  1997/07/14 11:47:10  robertj
 * Added "const" to numerous variables.
 *
 * Revision 1.45  1997/07/12 09:45:01  robertj
 * Fixed bug when URL has + sign in somthing other than parameters.
 *
 * Revision 1.44  1997/06/06 08:54:47  robertj
 * Allowed username/password on http scheme URL.
 *
 * Revision 1.43  1997/04/06 07:46:09  robertj
 * Fixed bug where URL has more than special character ('?', '#' etc).
 *
 * Revision 1.42  1997/03/28 04:40:24  robertj
 * Added tags for cookies.
 *
 * Revision 1.41  1997/03/18 22:03:44  robertj
 * Fixed bug that incorrectly parses URL with double slashes.
 *
 * Revision 1.40  1997/02/14 13:55:44  robertj
 * Fixed bug in URL for reproducing fields with special characters, must be escaped and weren't.
 *
 * Revision 1.39  1997/01/12 04:15:21  robertj
 * Globalised MIME tag strings.
 *
 * Revision 1.38  1996/09/14 13:09:28  robertj
 * Major upgrade:
 *   rearranged sockets to help support IPX.
 *   added indirect channel class and moved all protocols to descend from it,
 *   separating the protocol from the low level byte transport.
 *
 * Revision 1.37  1996/08/25 09:37:41  robertj
 * Added function to detect "local" host name.
 * Fixed printing of trailing '/' in empty URL, is distinction between with and without.
 *
 * Revision 1.36  1996/08/22 13:22:26  robertj
 * Fixed bug in print of URLs, extra @ signs.
 *
 * Revision 1.35  1996/08/19 13:42:40  robertj
 * Fixed errors in URL parsing and display.
 * Fixed "Forbidden" problem out of HTTP authorisation system.
 * Fixed authorisation so if have no user/password on basic authentication, does not require it.
 *
 * Revision 1.34  1996/07/27 04:13:47  robertj
 * Fixed use of HTTP proxy on non-persistent connections.
 *
 * Revision 1.33  1996/07/15 10:37:20  robertj
 * Improved proxy "self" detection (especially localhost).
 *
 * Revision 1.32  1996/06/28 13:20:24  robertj
 * Modified HTTPAuthority so gets PHTTPReqest (mainly for URL) passed in.
 * Moved HTTP form resource to another compilation module.
 * Fixed memory leak in POST command.
 *
 * Revision 1.31  1996/06/10 10:00:00  robertj
 * Added global function for query parameters parsing.
 *
 * Revision 1.30  1996/06/07 13:52:23  robertj
 * Added PUT to HTTP proxy FTP. Necessitating redisign of entity body processing.
 *
 * Revision 1.29  1996/06/05 12:33:04  robertj
 * Fixed bug in parsing URL with no path, is NOT absolute!
 *
 * Revision 1.28  1996/05/30 10:07:26  robertj
 * Fixed bug in version number checking of return code compatibility.
 *
 * Revision 1.27  1996/05/26 03:46:42  robertj
 * Compatibility to GNU 2.7.x
 *
 * Revision 1.26  1996/05/23 10:02:13  robertj
 * Added common function for GET and HEAD commands.
 * Fixed status codes to be the actual status code instead of sequential enum.
 * This fixed some problems with proxy pass through of status codes.
 * Fixed bug in URL parsing of username and passwords.
 *
 * Revision 1.19.1.1  1996/04/17 11:08:22  craigs
 * New version by craig pending confirmation by robert
 *
 * Revision 1.19  1996/04/05 01:46:30  robertj
 * Assured PSocket::Write always writes the number of bytes specified, no longer need write loops.
 * Added workaraound for NT Netscape Navigator bug with persistent connections.
 *
 * Revision 1.18  1996/03/31 09:05:07  robertj
 * HTTP 1.1 upgrade.
 *
 * Revision 1.17  1996/03/17 05:48:07  robertj
 * Fixed host name print out of URLs.
 * Added hit count to PHTTPResource.
 *
 * Revision 1.16  1996/03/16 05:00:26  robertj
 * Added ParseReponse() for splitting reponse line into code and info.
 * Added client side support for HTTP socket.
 * Added hooks for proxy support in HTTP socket.
 * Added translation type to TranslateString() to accommodate query variables.
 * Defaulted scheme field in URL to "http".
 * Inhibited output of port field on string conversion of URL according to scheme.
 *
 * Revision 1.15  1996/03/11 10:29:50  robertj
 * Fixed bug in help image HTML.
 *
 * Revision 1.14  1996/03/10 13:15:24  robertj
 * Redesign to make resources thread safe.
 *
 * Revision 1.13  1996/03/02 03:27:37  robertj
 * Added function to translate a string to a form suitable for inclusion in a URL.
 * Added radio button and selection boxes to HTTP form resource.
 * Fixed bug in URL parsing, losing first / if hostname specified.
 *
 * Revision 1.12  1996/02/25 11:14:24  robertj
 * Radio button support for forms.
 *
 * Revision 1.11  1996/02/25 03:10:34  robertj
 * Removed pass through HTTP resource.
 * Fixed PHTTPConfig resource to use correct name for config key.
 *
 * Revision 1.10  1996/02/19 13:48:28  robertj
 * Put multiple uses of literal strings into const variables.
 * Fixed URL parsing so that the unmangling of strings occurs correctly.
 * Moved nested classes from PHTTPForm.
 * Added overwrite option to AddResource().
 * Added get/set string to PHTTPString resource.
 *
 * Revision 1.9  1996/02/13 13:09:17  robertj
 * Added extra parameters to callback function in PHTTPResources, required
 *   by descendants to make informed decisions on data being loaded.
 *
 * Revision 1.8  1996/02/08 12:26:29  robertj
 * Redesign of resource callback mechanism.
 * Added new resource types for HTML data entry forms.
 *
 * Revision 1.7  1996/02/03 11:33:19  robertj
 * Changed RadCmd() so can distinguish between I/O error and unknown command.
 *
 * Revision 1.6  1996/02/03 11:11:49  robertj
 * Numerous bug fixes.
 * Added expiry date and ismodifiedsince support.
 *
 * Revision 1.5  1996/01/30 23:32:40  robertj
 * Added single .
 *
 * Revision 1.4  1996/01/28 14:19:09  robertj
 * Split HTML into separate source file.
 * Beginning of pass through resource type.
 * Changed PCharArray in OnLoadData to PString for convenience in mangling data.
 * Made PHTTPSpace return standard page on selection of partial path.
 *
 * Revision 1.3  1996/01/28 02:49:16  robertj
 * Further implementation.
 *
 * Revision 1.2  1996/01/26 02:24:30  robertj
 * Further implemetation.
 *
 * Revision 1.1  1996/01/23 13:04:32  robertj
 * Initial revision
 *
 */

#ifdef __GNUC__
#pragma implementation "http.h"
#pragma implementation "url.h"
#endif

#include <ptlib.h>

#define P_DISABLE_FACTORY_INSTANCES

#include <ptlib/sockets.h>
#include <ptclib/http.h>
#include <ptclib/url.h>

#include <ctype.h>

#ifdef WIN32
#include <shellapi.h>
#endif


// RFC 1738
// http://host:port/path...
// https://host:port/path....
// gopher://host:port
// wais://host:port
// nntp://host:port
// prospero://host:port
// ftp://user:password@host:port/path...
// telnet://user:password@host:port
// file://hostname/path...

// mailto:user@hostname
// news:string

#define DEFAULT_FTP_PORT	21