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Mon Nov 27 03:05:17 1995 UTC (28 years, 6 months ago) by frystyk
Branches: MAIN
CVS tags: v4/0, HEAD
alpha 7

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<TITLE>Request Manager</TITLE>
<!-- Changed by: Henrik Frystyk Nielsen, 24-Nov-1995 -->
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<H1>Request Manager</H1>

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

This module is the private part of the request manager. It has the
functions declarations that are private to the Library and that
shouldn't be used by applications. The module has been separated from
the old HTAccess module. See also the public part of the declarition
in the <A HREF="HTReq.html">HTReq Module</A>.<P>

This module is implemented by <A HREF="HTReqMan.c">HTReqMan.c</A>, and
it is a part of the <A HREF="http://www.w3.org/pub/WWW/Library/"> W3C
Reference Library</A>. <P>

<PRE>
#ifndef HTREQMAN_H
#define HTREQMAN_H

#include "<A HREF="HTReq.html">HTReq.h</A>"
#include "<A HREF="HTList.html">HTList.h</A>"
#include "<A HREF="HTFormat.html">HTFormat.h</A>"
#include "<A HREF="HTAnchor.html">HTAnchor.h</A>"
#include "<A HREF="HTMethod.html">HTMethod.h</A>"
#include "<A HREF="HTAABrow.html">HTAABrow.h</A>"
#include "<A HREF="HTStream.html">HTStream.h</A>"
#include "<A HREF="HTSocket.html">HTSocket.h</A>"
#include "<A HREF="HTNet.html">HTNet.h</A>"
</PRE>

<H2><A NAME="req">The Request structure</A></H2>

When a request is handled, all kinds of things about it need to be
passed along together with a request. It is intended to live as long
as the request is still active, but can be deleted as soon as it has
terminated. Only the anchor object stays around after the request
itself is terminated.

<PRE>
struct _HTRequest {
    HTMethod		method;
    HTReload		reload;

    char *		redirect;			  /* Location or URI */
    char *		boundary;		  /* MIME multipart boundary */
    int			retrys;       	      /* Number of automatic reloads */
    time_t		retry_after;		 /* Absolut time for a retry */
    HTNet *		net;		    /* Information about socket etc. */
    HTPriority		priority;		/* Priority for this request */
</PRE>

<H3>Accept headers</H3>

<PRE>
    HTList *		conversions;
    BOOL		conv_local;

    HTList *		encodings;
    BOOL		enc_local;

    HTList *		languages;
    BOOL		lang_local;

    HTList *		charsets;
    BOOL		char_local;
</PRE>

<H3>Headers and header information</H3>

<PRE>
    HTGnHd		GenMask;
    HTRqHd		RequestMask;
    HTEnHd		EntityMask;

    HTList *		parsers;
    BOOL		pars_local;

    HTList *		generators;
    BOOL		gens_local;
</PRE>

<H3>Anchors</H3>

<PRE>
    char *		access;	       /* The Server access for this request */
    HTParentAnchor *	anchor;	       /* The Client anchor for this request */

    HTChildAnchor *	childAnchor;	    /* For element within the object */
    HTParentAnchor *	parentAnchor;			/* For referer field */
</PRE>

<H3>Streams From Network to Application</H3>

<PRE>
    HTStream *		output_stream; 
    HTFormat		output_format;

    HTStream*		debug_stream;
    HTFormat		debug_format;
</PRE>

<H3>Streams From Application to Network</H3>

<PRE>
    HTStream *		input_stream; 
    HTFormat		input_format;
</PRE>

<H3>Callback Function for getting data down the Input Stream</H3>

<PRE>
    HTPostCallback *	PostCallback;
</PRE>

<H3>Context Swapping</H3>

<PRE>
    HTRequestCallback *	callback;
    void *		context;
</PRE>

<H3>Other Flags</H3>

<PRE>
    BOOL		preemtive;
    BOOL		ContentNegotiation;
    BOOL		using_proxy;
</PRE>

<H3>Error Manager</H3>

<PRE>
    HTList *		error_stack;		           /* List of errors */
</PRE>

<H3>PostWeb Information</H3>

<PRE>
    HTRequest *		source;		     /* Source for request or itself */
    HTRequest *		mainDestination;	     /* For the typical case */
    HTList *		destinations;		 /* List of related requests */
    int			destRequests;	   /* Number of destination requests */
    int			destStreams;	    /* Number of destination streams */
</PRE>

<H3>Access Authentication Information</H3>

This will go into its own structure

<PRE>
    char *	WWWAAScheme;		/* WWW-Authenticate scheme */
    char *	WWWAARealm;		/* WWW-Authenticate realm */
    char *	WWWprotection;		/* WWW-Protection-Template */
    char *	authorization;		/* Authorization: field */
    HTAAScheme	scheme;			/* Authentication scheme used */
    HTList *	valid_schemes;		/* Valid auth.schemes		  */
    HTAssocList **	scheme_specifics;/* Scheme-specific parameters	  */
    char *	authenticate;		/* WWW-authenticate: field */
    char *	prot_template;		/* WWW-Protection-Template: field */
    HTAASetup *	setup;			/* Doc protection info		  */
    HTAARealm *	realm;			/* Password realm		  */
    char *	dialog_msg;		/* Authentication prompt (client) */

#if 0
    HTInputSocket *	isoc;		/* InputSocket object for reading */
#endif
</PRE>

<H3>Windows Specific Information</H3>

<PRE>
#ifdef WWW_WIN_ASYNC
    HWND		hwnd;		/* Windows handle for MSWindows   */
    unsigned long	winMsg;	        /* msg number of Windows eloop    */
#endif /* WWW_WIN_ASYNC */
</PRE>

<PRE>
};
</PRE>

<H2>Post Web Management</H2>

These functions are mainly used internally in the Library but there is
no reason for them not to be public.

<PRE>
extern BOOL HTRequest_addDestination (HTRequest * src, HTRequest * dest);
extern BOOL HTRequest_removeDestination	(HTRequest * dest);

extern BOOL HTRequest_linkDestination (HTRequest * dest);
extern BOOL HTRequest_unlinkDestination (HTRequest * dest);

extern BOOL HTRequest_removePostWeb (HTRequest * me);
extern BOOL HTRequest_killPostWeb (HTRequest * me);

#define	HTRequest_mainDestination(me) \
	((me) &amp;&amp; (me)->source ? (me)->source->mainDestination : NULL)
#define HTRequest_isDestination(me) \
	((me) &amp;&amp; (me)->source &amp;&amp; (me) != (me)->source)
#define HTRequest_isMainDestination(me) \
	((me) &amp;&amp; (me)->source &amp;&amp; \
	(me) == (me)->source->mainDestination)
#define HTRequest_isSource(me) \
	((me) &amp;&amp; (me)->source &amp;&amp; (me) == (me)->source)
#define HTRequest_isPostWeb(me) ((me) &amp;&amp; (me)->source)
#define HTRequest_source(me) ((me) ? (me)->source : NULL)
</PRE>

End of Declaration

<PRE>
#endif /* HTREQMAN_H */
</PRE>
end of HTAccess
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