Home Page Management

**	(c) COPYRIGHT MIT 1995.
**	Please first read the full copyright statement in the file COPYRIGH.

This module provides some "make life easier" functions in order to get the application going. The functionality of this module was originally in HTAccess, but now it has been moved here as a part of the application interface where the application may use it if desired.

This module is implemented by HTHome.c, and it is a part of the W3C Sample Code Library.

#ifndef HTHOME_H
#define HTHOME_H
#include "WWWLib.h"

The home page is special in that this is is the first page to visit when  a client application starts up. Note that a home page is a generic URL and hence can be any resouce - not only resources on the local file system.

Personal Home Page

#define LOGICAL_DEFAULT 	"WWW_HOME"    /* Defined to be the home page */

#define PERSONAL_DEFAULT 	"WWW/default.html"	/* in home directory */

/* If the home page isn't found, use this file: */
#define LAST_RESORT		"http://www.w3.org/"

Home Page for Remote Access

Some Web applications can also be run remotely - for example as a telnet login shell. The Line Mode Browser is an example of such an application. In that case, the home page is often more generic than a personal home page.

/* If one telnets to an access point it will look in this file for home page */
#define REMOTE_POINTER 		 "/etc/www-remote.url"	    /* can't be file */

/* and if that fails it will use this. */
#define REMOTE_ADDRESS  	"http://www.w3.org/"	    /* can't be file */

#define LOCAL_DEFAULT_FILE 	"/usr/local/lib/WWW/default.html"

Get an Anchor for the Home Page

Getting an anchor for the home page involves looking for the (environment) variables described in the section above. As this is something that almost all client applications must do then we provide some simple methods that do the work for you.

extern HTParentAnchor * HTHomeAnchor (void);

Create a New Anchor for Temporary Local Files

When the user starts writing a new document, the client application should create a new anchor which can contain the document while it is created. This can also be the location for backups and for security "auto-save" functionality. This functions creates a new anchor with a URL pointing to the temporary location defined by this user profile and returns that anchor. Andy Levine: I additionally found that calling HTTmpAnchor repeatedly without freeing the newly allocated anchor will cause the anchor hash table to continue to grow.

extern HTParentAnchor * HTTmpAnchor (HTUserProfile * up);

Get The Current Directory in URL form

Creates a local file URL that can be used as a relative name when calling expanding other URLs relative to the current location in the local file system tree where the application is running. The code for this routine originates from the Line Mode Browser and was moved here by howcome@w3.org in order for all clients to take advantage.

#define HTFindRelatedName	HTGetCurrentDirectoryURL
extern char *  HTGetCurrentDirectoryURL (void);

Handle HTML Form Input fields

Takes a string of the form "a=b" containing HTML form data, escapes it accordingly and puts it into the association list so that it readily can be passed to any of the HTAccess function that handles HTML form data. The string should not be encoded in any way - this function encodes it according to the HTML form encoding rules.

Examples are "foo=bar", "baz=foo and bar", "a= b ", " a = b ", "toto=", "four = two + two", "six three + three", and "a=b=c"

extern BOOL HTParseFormInput (HTAssocList * list, const char * str);

Handle Library Trace Messages

Standard interface to libwww TRACE messages. Pass this function a string of characters. It will set up the appropriate TRACE flags. The following characters are used as follows:

Show BASIC UTILITIES Trace Messages
Show CACHE Trace Messages
Show SGML Trace Messages
Show BIND Trace Messages
Show THREAD Trace Messages
Show STREAM Trace Messages
Show PROTOCOL Trace Messages
Show MEMORY Trace Messages
Show SQL Trace Messages
Show URI Trace Messages
Show AUTH Trace Messages
Show ANCHOR Trace Messages
Show PICS Trace Messages
Show CORE Trace Messages
Show MUX Trace Messages
Show ALL Trace Messages

The string must be null terminated, an example is "sop".

extern int HTSetTraceMessageMask (const char * shortnames);
#endif /* HTHOME_H */

@(#) $Id: HTHome.html,v 2.19 2000/07/04 15:19:45 kahan Exp $