/*
*
* (c) COPYRIGHT MIT and INRIA, 1996.
* Please first read the full copyright statement in file COPYRIGHT.
*
*/
/*
* AHTBridge.c : This module implements the callback setup and
* handlers between the Xt, libwww, and Amaya procedures. It's responsible
* for assigning, modifying, and supressing Xt events to the active
* requests.
*
* Author: J Kahan
* J. K./R. Guetari. Windows NT/95 routines
*
*/
#ifndef AMAYA_JAVA
#define THOT_EXPORT extern
#include "amaya.h"
#include "AHTBridge_f.h"
#include "AHTFWrite_f.h"
#include "query_f.h"
#include "answer_f.h"
#include "HTEvtLst.h"
#if 0
#define DEBUG_LIBWWW
#define THD_TRACE 1
#endif
#ifndef _WINDOWS
/* Amaya's X appcontext */
extern ThotAppContext app_cont;
/* Private functions */
#ifdef __STDC__
static void RequestRegisterReadXtevent (SOCKET);
static void RequestKillReadXtevent (SOCKET);
static void RequestRegisterWriteXtevent ( SOCKET);
static void RequestKillWriteXtevent (SOCKET);
static void RequestRegisterExceptXtevent ( SOCKET);
static void RequestKillExceptXtevent (SOCKET);
#else /* __STDC__ */
static void RequesAddReadXtevent ();
static void RequestKillReadXtevent ();
static void RequesAddWriteXtevent ();
static void RequestKillWriteXtevent ();
static void RequestRegisterExceptXtevent ();
static void RequestKillExceptXtevent ();
#endif /* __STDC__ */
#endif /* !_WINDOWS */
/* Private variables */
/*
* this set of HTEventType map our WinSock "socket event HTEventType" into
* our read and write sets. Note that under the canonical Unix model,
* a non-blocking socket passed to an accept() call will appear as readable,
* whilst a non-blocking call to connect() will appear as writeable. In add.
* if the connection has been closed, the socket will appear readable under
* BSD Unix semantics
*/
static const HTEventType ReadBits = HTEvent_READ | HTEvent_ACCEPT | HTEvent_CLOSE;
static const HTEventType WriteBits = HTEvent_WRITE | HTEvent_CONNECT;
static const HTEventType ExceptBits = HTEvent_OOB;
typedef struct sStatus {
XtInputId read; /* the different XtId's */
XtInputId write;
XtInputId except;
} SocketStatus;
#define SOCK_TABLE_SIZE 67
#define HASH(s) ((s) % SOCK_TABLE_SIZE)
static SocketStatus persSockets[SOCK_TABLE_SIZE];
/*--------------------------------------------------------------------
AHTCallback_bridge
this function acts as a bridge between Xt and libwww. From the Xt
point of view, this function is the callback handler whenever there's
any activity on the sockets associated with the active requests. From
the libwww point of view, this is the function that takes the initiative
to invoke the callback function associated with an active request,
whenever there's an activity in the socket associated to it.
In this latter aspect, this function is similar to the library's
own __DoCallback() function.
Upon activation, the function looks up the request associated with the
active socket and then looks up the cbf associated with that request.
Upon completion of the execution of the request's cbf, it verifies
the state of the request and, if it's an asynchronous request, deletes
the memory allocated to it.
-------------------------------------------------------------------*/
#ifndef _WINDOWS
#ifdef __STDC__
void *AHTCallback_bridge (caddr_t cd, int *s, XtInputId * id)
#else /* __STDC__ */
void *AHTCallback_bridge (cd, s, id)
caddr_t cd;
int *s;
XtInputId *id;
#endif /* __STDC__ */
{
int status; /* the status result of the libwwww call */
HTEventType type = HTEvent_ALL;
int v;
int socket = *s;
ms_t now = HTGetTimeInMillis();
v = HASH (socket);
/* convert the FD into an HTEventType which will allow us to find the
request associated with the socket */
/* I could send some other data here, like the event itself, right */
switch ((XtInputId) cd)
{
case XtInputReadMask:
type = HTEvent_READ;
break;
case XtInputWriteMask:
type = HTEvent_WRITE;
break;
case XtInputExceptMask:
type = HTEvent_OOB;
break;
default:
type = HTEvent_ALL;
break;
} /* switch */
/* Invokes the callback associated to the requests */
/** CanDoStop_set (FALSE); **/
if ((status = HTEventList_dispatch (socket, type, now)) != HT_OK)
{
#ifdef DEBUG_LIBWWW
HTTrace ("Callback.... returned a value != HT_OK");
#endif
}
/*** CanDoStop_set (TRUE); **/
return (0);
}
#endif /* !_WINDOWS */
/*--------------------------------------------------------------------
ProcessTerminateRequest
This function is called whenever a request has ended. If the requested
ended normally, the function will call any callback associated to the
request. Otherwise, it will just mark the request as over.
-------------------------------------------------------------------*/
#ifdef __STDC__
void ProcessTerminateRequest (HTRequest * request, HTResponse * response, void *param, int status)
#else
void ProcessTerminateRequest (request, response, param, status)
HTRequest *request;
HTResponse *response;
void *param;
int status;
#endif
{
AHTReqContext *me = HTRequest_context (request);
/* choose a correct treatment in function of the request's
being associated with an error, with an interruption, or with a
succesful completion */
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr,"ProcessTerminateRequest: processing req %p, url %s, status %d\n", me, me->urlName, me->reqStatus);
#endif /* DEBUG_LIBWWW */
if (me->reqStatus == HT_END)
{
if (AmayaIsAlive () && me->terminate_cbf)
(*me->terminate_cbf) (me->docid, 0, ISO2WideChar(me->urlName), ISO2WideChar(me->outputfile),
ISO2WideChar(me->content_type), me->context_tcbf);
}
else if (me->reqStatus == HT_ABORT)
/* either the application ended or the user pressed the stop
button. We erase the incoming file, if it exists */
{
if (AmayaIsAlive () && me->terminate_cbf)
(*me->terminate_cbf) (me->docid, -1, ISO2WideChar(me->urlName), ISO2WideChar(me->outputfile),
ISO2WideChar(me->content_type), me->context_tcbf);
if (me->outputfile && me->outputfile[0] != EOS)
{
TtaFileUnlink (ISO2WideChar (me->outputfile));
me->outputfile[0] = EOS;
}
}
else if (me->reqStatus == HT_ERR)
{
/* there was an error */
if (AmayaIsAlive && me->terminate_cbf)
(*me->terminate_cbf) (me->docid, -1, ISO2WideChar(me->urlName), ISO2WideChar(me->outputfile),
ISO2WideChar(me->content_type), me->context_tcbf);
if (me->outputfile && me->outputfile[0] != EOS)
{
TtaFileUnlink (ISO2WideChar (me->outputfile));
me->outputfile[0] = EOS;
}
}
/* we erase the context if we're dealing with an asynchronous request */
if ((me->mode & AMAYA_ASYNC)
|| (me->mode & AMAYA_IASYNC))
{
Document doc = me->docid;
me->reqStatus = HT_END;
/*** @@@ do we need this? yes!! **/
AHTLoadTerminate_handler (request, response, param, status);
AHTReqContext_delete (me);
AHTPrintPendingRequestStatus (doc, YES);
}
}
#ifdef _WINDOWS
/*----------------------------------------------------------------
WIN_Activate_Request
when there are more open requests than available sockets, the
requests are put in a "pending state." When a socket becomes
available, libwww associates it with a pending request and then
calls this callback function. This function is responsible for
opening the temporary file where the GET and POST results
will be stored. The function is also responsible for
registering the socket with the Xt event loop.
Consult the libwww manual for more details on the signature
of this function.
----------------------------------------------------------------*/
#ifdef __STDC__
int WIN_Activate_Request (HTRequest * request, HTAlertOpcode op, int msgnum, const char *dfault, void *input, HTAlertPar * reply)
#else
int WIN_Activate_Request (request, op, msgnum, dfault, input, reply)
HTRequest *request;
HTAlertOpcode op;
int msgnum;
const char *dfault;
void *input;
HTAlertPar *reply;
#endif /* __STDC__ */
{
AHTReqContext *me = HTRequest_context (request);
if (me->reqStatus == HT_NEW)
{
if (!(me->output)
&& (me->output != stdout)
&& me->outputfile
&& (me->output = ufopen (ISO2WideChar (me->outputfile), _WBinaryMODE_)) == NULL) {
/* the request is associated with a file */
me->outputfile[0] = EOS; /* file could not be opened */
TtaSetStatus (me->docid, 1,
TtaGetMessage (AMAYA, AM_CANNOT_CREATE_FILE),
ISO2WideChar(me->outputfile));
me->reqStatus = HT_ERR;
if (me->error_html)
DocNetworkStatus[me->docid] |= AMAYA_NET_ERROR; /* so we can show the error message */
}
else
{
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "WIN_Activate_Request: Activating pending %s. "
"Open fd %d\n", me->urlName, (int) me->output);
#endif /* DEBUG_LIBWWW */
HTRequest_setOutputStream (me->request, AHTFWriter_new (me->request, me->output, YES));
/*change the status of the request */
me->reqStatus = HT_WAITING;
}
}
else if (me->reqStatus == HT_WAITING)
{
/*change the status of the request */
rewind (me->output);
if (HTRequest_outputStream (me->request) == NULL)
HTRequest_setOutputStream (me->request, AHTFWriter_new (me->request, me->output, YES));
}
else {
me->reqStatus = HT_ERR;
}
return ((me->reqStatus != HT_ERR) ? HT_OK : HT_ERROR);
}
#endif /* WINDOWS but should be an else */
/* #else */ /* _WINDOWS */
#ifndef _WINDOWS
/*----------------------------------------------------------------------
AHTEvent_register
callback called by libwww whenever a socket is open and associated
to a request. It sets the pertinent Xt events so that the Xt Event
loops gets an interruption whenever there's action of the socket.
In addition, it registers the request with libwww.
----------------------------------------------------------------------*/
#ifdef __STDC__
int AHTEvent_register (SOCKET sock, HTEventType type, HTEvent *event)
#else
int AHTEvent_register (sock, type, event)
SOCKET sock;
HTEventType type;
HTEvent *event;
#endif /* __STDC__ */
{
int status;
if (sock == INVSOC)
{
#ifdef DEBUG_LIBWWW
fprintf(stderr, "AHTEvent_register: sock = INVSOC\n");
#endif /* DEBUG_LIBWWW */
return (0);
}
#ifndef _WINDOWS
/* need something special for HTEvent_CLOSE */
if (type & ReadBits)
RequestRegisterReadXtevent (sock);
if (type & WriteBits)
RequestRegisterWriteXtevent (sock);
if (type & ExceptBits)
RequestRegisterExceptXtevent (sock);
#endif /* !_WINDOWS */
#ifdef _WINDOWS
/* under windows, libwww requires an explicit FD_CLOSE registration
to detect HTTP responses not having a Content-Length header */
status = HTEventList_register (sock, type | HTEvent_CLOSE , event);
#else
status = HTEventList_register (sock, type, event);
#endif /* _WINDOWS */
return (status);
}
#endif /* _WINDOWS */
/*----------------------------------------------------------------------
AHTEvent_unregister
callback called by libwww each time a request is unregistered. This
function takes care of unregistering the pertinent Xt events
associated with the request's socket. In addition, it unregisters
the request from libwww.
----------------------------------------------------------------------*/
#ifdef __STDC__
int AHTEvent_unregister (SOCKET sock, HTEventType type)
#else
int AHTEvent_unregister (sock, type)
SOCKET sock;
HTEventType type;
#endif /* __STDC__ */
{
int status;
#ifndef _WINDOWS
/* remove the Xt event hooks */
if (type & ReadBits)
RequestKillReadXtevent (sock);
if (type & WriteBits)
RequestKillWriteXtevent (sock);
if (type & ExceptBits)
RequestKillExceptXtevent (sock);
#endif /* !_WINDOWS */
/* @@@ if this is the default for windows, no need to have AHTEvent_..
in windows!! */
/* call libwww's default routine */
status = HTEventList_unregister (sock, type);
return (status);
}
#ifndef _WINDOWS
/* Private functions */
/*----------------------------------------------------------------------
RequestKillAllXtevents
front-end for kill all Xt events associated with the request pointed
to by "me".
----------------------------------------------------------------------*/
#ifdef __STDC__
void RequestKillAllXtevents (AHTReqContext * me)
#else
void RequestKillAllXtevents (me)
AHTReqContext *me;
#endif /* __STDC__ */
{
int sock = INVSOC;
return;
/* @@@ what to do with this one? @@@ */
if (me->read_sock != INVSOC)
sock = me->read_sock;
else
if (me->write_sock != INVSOC)
sock = me->write_sock;
else
if (me->except_sock != INVSOC)
sock = me->except_sock;
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "RequestKillAllXtEvents: Clearing XtInputs\n");
#endif /* DEBUG_LIBWWW */
RequestKillReadXtevent (sock);
RequestKillWriteXtevent (sock);
RequestKillExceptXtevent (sock);
}
/*----------------------------------------------------------------------
RequestRegisterReadXtevent
Registers with Xt the read events associated with socket sock
----------------------------------------------------------------------*/
#ifdef __STDC__
static void RequestRegisterReadXtevent (SOCKET sock)
#else
static void RequestRegisterReadXtevent (sock)
SOCKET sock;
#endif /* __STDC__ */
{
int v;
v = HASH (sock);
if (!persSockets[v].read)
{
persSockets[v].read =
XtAppAddInput (app_cont,
sock,
(XtPointer) XtInputReadMask,
(XtInputCallbackProc) AHTCallback_bridge,
(XtPointer) XtInputReadMask);
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "RegisterReadXtEvent: adding XtInput %lu Socket %d\n",
persSockets[v].read, sock);
#endif /* DEBUG_LIBWWW */
}
}
/*----------------------------------------------------------------------
RequestKillReadXtevent
kills any read Xt event associated with the request pointed to by "me".
----------------------------------------------------------------------*/
#ifdef __STDC__
static void RequestKillReadXtevent (SOCKET sock)
#else
static void RequestKillReadXtevent (sock)
SOCKET sock;
#endif /* __STDC__ */
{
int v;
v = HASH (sock);
if (persSockets[v].read)
{
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "UnregisterReadXtEvent: Clearing XtInput %lu\n",
persSockets[v].read);
#endif /* DEBUG_LIBWWW */
XtRemoveInput (persSockets[v].read);
persSockets[v].read = (XtInputId) NULL;
}
}
/*----------------------------------------------------------------------
RequestRegisterWriteXtevent
Registers with Xt the write events associated with socket sock
----------------------------------------------------------------------*/
#ifdef __STDC__
static void RequestRegisterWriteXtevent (SOCKET sock)
#else
static void RequestRegisterWriteXtevent (sock)
SOCKET sock;
#endif /* __STDC__ */
{
int v;
v = HASH (sock);
if (!persSockets[v].write)
{
persSockets[v].write =
XtAppAddInput (app_cont,
sock,
(XtPointer) XtInputWriteMask,
(XtInputCallbackProc) AHTCallback_bridge,
(XtPointer) XtInputWriteMask);
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "RegisterWriteXtEvent: Adding XtInput %lu Socket %d\n",
persSockets[v].write, sock);
#endif /* DEBUG_LIBWWW */
}
}
/*----------------------------------------------------------------------
RequestKillWriteXtevent
kills any write Xt event associated with the request pointed to
by "me".
----------------------------------------------------------------------*/
#ifdef __STDC__
static void RequestKillWriteXtevent (SOCKET sock)
#else
static void RequestKillWriteXtevent (sock)
SOCKET sock;
#endif /* __STDC__ */
{
int v;
v = HASH (sock);
if (persSockets[v].write)
{
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "UnRegisterWriteXtEvent: Clearing Write XtInputs "
"%lu\n",
persSockets[v].write);
#endif /* DEBUG_LIBWWW */
XtRemoveInput (persSockets[v].write);
persSockets[v].write = (XtInputId) NULL;
}
}
/*----------------------------------------------------------------------
RequestRegisterExceptXtevent
Registers with Xt the except events associated with socket sock
----------------------------------------------------------------------*/
#ifdef __STDC__
static void RequestRegisterExceptXtevent (SOCKET sock)
#else
static void RequestRegisterExceptXtevent (sock)
SOCKET sock;
#endif /* __STDC__ */
{
int v;
v = HASH (sock);
if (!persSockets[v].except)
{
persSockets[v].except =
XtAppAddInput (app_cont,
sock,
(XtPointer) XtInputExceptMask,
(XtInputCallbackProc) AHTCallback_bridge,
(XtPointer) XtInputExceptMask);
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "RegisterExceptXtEvent: adding XtInput %lu Socket %d\n",
persSockets[v].except, sock);
#endif /* DEBUG_LIBWWW */
}
}
/*----------------------------------------------------------------------
RequestKillExceptXtevent
kills any exception Xt event associated with the request pointed to
by "me".
----------------------------------------------------------------------*/
#ifdef __STDC__
static void RequestKillExceptXtevent (SOCKET sock)
#else
static void RequestKillExceptXtevent (sock)
SOCKET sock;
#endif /* __STDC__ */
{
int v;
v = HASH (sock);
if (persSockets[v].except)
{
#ifdef DEBUG_LIBWWW
if (THD_TRACE)
fprintf (stderr, "UnregisterExceptXtEvent: Clearing Except XtInputs "
"%lu\n", persSockets[v].except);
#endif /* DEBUG_LIBWWW */
XtRemoveInput (persSockets[v].except);
persSockets[v].except = (XtInputId) NULL;
}
}
/*----------------------------------------------------------------------
Xt Timer functions
----------------------------------------------------------------------*/
struct _HTTimer {
ms_t millis; /* Relative value in millis */
ms_t expires; /* Absolute value in millis */
BOOL relative;
BOOL repetitive;
void * param; /* Client supplied context */
HTTimerCallback * cbf;
};
struct _AmayaTimer {
HTTimer *libwww_timer;
XtIntervalId xt_timer;
};
typedef struct _AmayaTimer AmayaTimer;
static HTList *Timers = NULL;
/*----------------------------------------------------------------------
----------------------------------------------------------------------*/
void *TimerCallback (XtPointer cdata, XtIntervalId *id)
{
HTList *cur, *last;
AmayaTimer *me;
HTTimer *libwww_timer;
if (!AmayaIsAlive ()
|| Timers == NULL)
return (0);
/* find the timer from the uid */
last = cur = Timers;
while ((me = (AmayaTimer * ) HTList_nextObject (cur)))
{
if (me->xt_timer == *id)
break;
last = cur;
}
if (me)
{
libwww_timer = me->libwww_timer;
/* remove the element from the list @@@ can be optimized later */
HTList_quickRemoveElement(cur, last);
TtaFreeMemory (me);
HTTimer_dispatch (libwww_timer);
}
return (0);
}
/*----------------------------------------------------------------------
KillAllTimers
----------------------------------------------------------------------*/
#ifdef __STDC__
void KillAllTimers (void)
#else
void KillAllTimers ()
#endif /* __STDC__ */
{
/* @@@ maybe add something else to kill the Xt things */
if (Timers)
HTList_delete (Timers);
Timers = NULL;
}
/*----------------------------------------------------------------------
AMAYA_SetTimer
----------------------------------------------------------------------*/
#ifdef __STDC__
void AMAYA_SetTimer (HTTimer *libwww_timer)
#else
void AMAYA_SetTimer (libwww_timer)
HTTimer *libwww_timer;
#endif /* __STDC__ */
{
HTList *cur, *last;
AmayaTimer *me;
if (!AmayaIsAlive
|| libwww_timer == NULL
|| libwww_timer->expires == 0)
return;
if (Timers == NULL)
Timers = HTList_new ();
/* see if this timer existed already */
last = cur = Timers;
while ((me = (AmayaTimer * ) HTList_nextObject (cur)))
{
if (me->libwww_timer == libwww_timer)
break;
last = cur;
}
if (me)
{
/* remove the old timer */
if (me->xt_timer)
{
XtRemoveTimeOut (me->xt_timer);
me->xt_timer = (XtIntervalId) NULL;
}
}
else
{
/* create a new element */
me = TtaGetMemory (sizeof (AmayaTimer));
/* and add it to the list */
HTList_addObject(last, (void *) me);
me->libwww_timer = libwww_timer;
}
/* add a new time out */
me->xt_timer = XtAppAddTimeOut (app_cont,
me->libwww_timer->millis,
(XtTimerCallbackProc) TimerCallback,
(XtPointer *) (void *) me);
}
/*----------------------------------------------------------------------
AMAYA_DeleteTimer
----------------------------------------------------------------------*/
#ifdef __STDC__
void AMAYA_DeleteTimer (HTTimer *libwww_timer)
#else
void AMAYA_DeleteTimer (libwww_timer)
HTTimer *libwww_timer;
#endif /* __STDC__ */
{
HTList *cur, *last;
AmayaTimer *me;
if (Timers == NULL || libwww_timer == NULL)
return;
/* find the id */
last = cur = Timers;
while ((me = (AmayaTimer * ) HTList_nextObject (cur)))
{
if (me->libwww_timer == libwww_timer)
break;
last = cur;
}
if (me)
{
/* remove the Xt timer */
XtRemoveTimeOut (me->xt_timer);
/* and the element from the list */
HTList_removeObject (Timers, me);
TtaFreeMemory (me);
}
}
#endif /* !_WINDOWS */
#endif /* !AMAYA_JAVA */
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