http.cxx

mgcp协议源代码。支持多种编码：g711

/*
 * http.cxx
 *
 * HTTP ancestor class and common classes.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-1998 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.
 *
 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
 * All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: http.cxx,v $
 * 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>
#include <ptlib/sockets.h>
#include <ptclib/http.h>
#include <ptclib/url.h>

#include <ctype.h>


// 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
#define DEFAULT_TELNET_PORT	23
#define DEFAULT_GOPHER_PORT	70
#define DEFAULT_HTTP_PORT	80
#define DEFAULT_NNTP_PORT	119
#define DEFAULT_WAIS_PORT	210
#define DEFAULT_HTTPS_PORT	443
#define DEFAULT_RTSP_PORT	554
#define DEFAULT_RTSPU_PORT	554
#define DEFAULT_PROSPERO_PORT	1525

enum SchemeFormat {
  HostPort = 1,
  UserPasswordHostPort = 2,
  HostOnly = 3,
  Other = 4
};

class schemeStruct {
  public:
    const char * name;
    int  type;
    BOOL hasDoubleSlash;
    WORD defaultPort;
};

static schemeStruct const schemeInfo[] = {
  { "http",      UserPasswordHostPort, TRUE, DEFAULT_HTTP_PORT },
  { "https",     HostPort, TRUE, DEFAULT_HTTPS_PORT },
  { "gopher",    HostPort, TRUE, DEFAULT_GOPHER_PORT },
  { "wais",      HostPort, TRUE, DEFAULT_WAIS_PORT },
  { "nntp",      HostPort, TRUE, DEFAULT_NNTP_PORT },
  { "prospero",  HostPort, TRUE, DEFAULT_PROSPERO_PORT },
  { "rtsp",      HostPort, TRUE, DEFAULT_RTSP_PORT },
  { "rtspu",     HostPort, TRUE, DEFAULT_RTSPU_PORT },

  { "ftp",       UserPasswordHostPort, TRUE, DEFAULT_FTP_PORT },
  { "telnet",    UserPasswordHostPort, TRUE, DEFAULT_TELNET_PORT },
  { "file",      HostOnly,             TRUE },
  { "mailto",    Other, FALSE},
  { "news",      Other, FALSE},
  { NULL }
};

static schemeStruct const defaultSchemeInfo = { "other", Other, FALSE};

static const schemeStruct & GetSchemeInfo(const PString & scheme)
{
  PINDEX i;
  for (i = 0; schemeInfo[i].name != NULL; i++)
    if (scheme *= schemeInfo[i].name)
      return schemeInfo[i];
  return defaultSchemeInfo;
}

//////////////////////////////////////////////////////////////////////////////
// PURL

PURL::PURL()
{
  scheme = "http";
  port   = 0;
}


PURL::PURL(const char * str)
{
  Parse(str);
}


PURL::PURL(const PString & str)
{
  Parse(str);
}


PObject::Comparison PURL::Compare(const PObject & obj) const
{
  PAssert(obj.IsDescendant(PURL::Class()), PInvalidCast);
  const PURL & other = (const PURL &)obj;
  Comparison c = scheme.Compare(other.scheme);
  if (c == EqualTo) {
    c = username.Compare(other.username);
    if (c == EqualTo) {
      c = password.Compare(other.password);
      if (c == EqualTo) {
        c = hostname.Compare(other.hostname);
        if (c == EqualTo) {
          c = pathStr.Compare(other.pathStr);
          if (c == EqualTo) {
            c = parameters.Compare(other.parameters);
            if (c == EqualTo) {
              c = fragment.Compare(other.fragment);
              if (c == EqualTo)
                c = queryStr.Compare(other.queryStr);
            }
          }
        }
      }
    }
  }
  return c;
}


PINDEX PURL::HashFunction() const
{
  return ((BYTE)toupper(scheme[0]) +
          (BYTE)toupper(username[0]) +
          (BYTE)toupper(password[0]) +
          (BYTE)toupper(hostname[0]) +
          (BYTE)toupper(pathStr[0]) +
          (BYTE)toupper(parameters[0]) +
          (BYTE)toupper(fragment[0]) +
          (BYTE)toupper(queryStr[0]))%41;
}


void PURL::PrintOn(ostream & stream) const
{
  stream << AsString(FullURL);
}


void PURL::ReadFrom(istream & stream)
{