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|
/*@@
@file Server.c
@date Wed Sep 13 20:10:24 2000
@author Tom Goodale
@desc
Web serving and utility routines.
@enddesc
@version $Header$
@@*/
#include <stdlib.h>
#include <string.h>
#include "cctk.h"
#include "cctk_Parameters.h"
#include "httpd_Map.h"
#include "util_String.h"
#include "httpd.h"
#include "Steer.h"
#include "Expression.h"
#include "SString_Namespace.h"
static const char *rcsid = "$Header$";
CCTK_FILEVERSION(CactusConnect_HTTPD_Server_c)
/********************************************************************
********************* Local Data Types ***********************
********************************************************************/
typedef struct
{
int (*function)(const cGH *, httpRequest *, void *);
void *data;
} httpPage;
/********************************************************************
********************* Local Routine Prototypes *********************
********************************************************************/
static httpPage *CreatePageData(int (*function)(const cGH *,httpRequest *, void *), void *data);
static httpPage *FindPage(const char *path, const char **residual);
static int StatusUntilIt (const cGH *cctkGH);
static int StatusUntilTime (const cGH *cctkGH);
static int StatusUntilExpression (cGH *cctkGH);
static double evaluator(const char *name, void *data);
/********************************************************************
********************* Other Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Local Data *****************************
********************************************************************/
static uMap pages = NULL;
static const char *notfound_page =
"<html>\n<head>\n<title>Error 404: Not Found</title>\n</head>\n"
"<body>\nThe URI you requested could not be found\n</body>\n</html>\n";
static const char *notimplemented_page =
"<html>\n<head>\n<title>Error 501: Not Implemented</title>\n</head>\n"
"<body>\nThe requested method is not implemented\n</body>\n<html>\n";
#define INITIAL_SIZE 16
/********************************************************************
********************* External Routines **********************
********************************************************************/
/*@@
@routine HTTP_RequestGet
@date Wed Sep 13 20:10:24 2000
@author Tom Goodale
@desc
Routine to deal with a GET request.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_RequestGET(cGH *cctkGH, httpRequest *request)
{
int retval = -1;
const char *residual = NULL;
httpPage *pagedata = FindPage(HTTP_URI( request ), &residual );
HTTP_SetResidual( request, residual );
if( pagedata )
{
retval = pagedata->function(cctkGH, request, pagedata->data);
}
if(retval < 0)
{
HTTP_Send(request,"HTTP/1.0 404 Not Found\r\n");
HTTP_Send(request,"Content-Type: text/html\r\n\r\n");
HTTP_Send(request, notfound_page);
}
return retval;
}
/*@@
@routine HTTP_RequestUnsupported
@date Thu Sep 14 12:18:56 2000
@author Tom Goodale
@desc
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_RequestUnsupported(cGH *cctkGH, httpRequest *request)
{
cctkGH = cctkGH; /* avoid compiler warning about unused parameter */
HTTP_Send(request,"HTTP/1.0 501 Not Implemented\r\n");
HTTP_Send(request,"Content-Type: text/html\r\n\r\n");
HTTP_Send(request, notimplemented_page );
return 0;
}
/*@@
@routine HTTP_RegisterPage
@date Wed Sep 13 20:10:24 2000
@author Tom Goodale
@desc
Routine to register a web page.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_RegisterPage(const char *path, int (*function)(const cGH *, httpRequest *, void *), void *data)
{
int retval = -1;
/* Create the hash table if it's not already been created */
if(! pages)
{
pages = Httpd_MapCreate();
}
if(Httpd_MapData(pages, strlen(path), path))
{
CCTK_VWarn(1, __LINE__,__FILE__,CCTK_THORNSTRING,
"Page exists already:\n\"%s\"", path);
}
else
{
httpPage *pagedata = CreatePageData(function, data);
if(pagedata)
{
retval = Httpd_MapStore(pages, strlen(path), path, (void *)pagedata);
}
else
{
retval = -2;
}
}
return retval;
}
/*@@
@routine HTTP_UpdateState
@date Sat Sep 16 21:12:23 2000
@author Tom Goodale
@desc
Updates the state of the server from the latest parameter values.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_UpdateState(cGH *cctkGH, httpState *state)
{
DECLARE_CCTK_PARAMETERS
int stepping = single_step;
static int steering = 1;
static int last_steered = -1;
state->paused = (! stepping) &&
(pause || (cctkGH &&
((until_it_active && StatusUntilIt(cctkGH)) ||
(until_time_active && StatusUntilTime(cctkGH)) ||
(until_expression_active && StatusUntilExpression(cctkGH)))));
/* If single step is selected, need to reset the parameter to force a pause
* next time.
*/
if(stepping)
{
HTTP_SteerQueue(CCTK_THORNSTRING, "single_step", "no");
}
if(cctkGH && ! state->paused)
{
if(steering)
{
if(steering_frequency > 0 &&
steering_frequency+last_steered <= cctkGH->cctk_iteration)
{
/* Time to steer */
state->steer = 1;
last_steered = cctkGH->cctk_iteration;
}
else
{
state->steer = 0;
}
if(steering_frequency <= 0)
{
/* Once steering is switched off, can't restart it ! */
steering = 0;
}
}
}
else
{
state->steer = 1;
}
state->terminate = terminate;
if(!state->paused)
{
state->timeout_seconds = timeout_seconds;
state->timeout_useconds = timeout_useconds;
}
else
{
state->timeout_seconds = -1;
state->timeout_useconds = -1;
}
return 0;
}
/*@@
@routine HTTP_Terminate
@date Sat Sep 16 21:40:27 2000
@author Tom Goodale
@desc
Terminate the simulation.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int HTTP_Terminate(cGH *cctkGH)
{
HTTP_SteerQueue("Cactus","terminate_next","yes");
return 0;
}
/********************************************************************
********************* Local Routines *************************
********************************************************************/
/*@@
@routine CreatePageData
@date Wed Sep 13 20:10:24 2000
@author Tom Goodale
@desc
Creates a httpPage structure.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
static httpPage *CreatePageData(int (*function)(const cGH *, httpRequest *, void *), void *data)
{
httpPage *pagedata = (httpPage *)malloc(sizeof(httpPage));
if(pagedata)
{
pagedata->function = function;
pagedata->data = data;
}
return pagedata;
}
/*@@
@routine FindPage
@date Wed Sep 13 20:10:24 2000
@author Tom Goodale
@desc
Finds a page, if it exists.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
static httpPage *FindPage(const char *path, const char **residual)
{
httpPage *pagedata = NULL;
#ifdef HTTP_DEBUG
printf ("Searching for '%s'\n", path);
#endif
if(pages && path)
{
String *temp = String_New();
/* Check for index.html */
if(strlen(path) == 0 || strcmp( path, "/") == 0 )
{
#ifdef HTTP_DEBUG
printf("Looking for '%sindex.html'\n", path);
#endif
SetToCString( temp, path);
ConcatCString( temp,"index.html");
pagedata = Httpd_MapData(pages, Length(temp), GetBuffer(temp));
}
else if((pagedata = Httpd_MapData(pages, strlen(path), path)))
{
/* Or exact path */
}
else
{
#ifdef HTTP_DEBUG
printf("Looking for '%s/index.html'\n", path);
#endif
SetToCString( temp, path);
ConcatCString( temp,"/index.html");
pagedata = Httpd_MapData(pages, Length(temp), GetBuffer(temp));
}
*residual = NULL;
if(!pagedata && strlen( path ) > 0)
{
const char *position;
/* Ok, now cycle through. Know it doesn't end with a slash */
for(position = path+strlen(path)-1; position >= path; position--)
{
if(*position == '/')
{
#ifdef HTTP_DEBUG
printf("Looking for '%s' less '%s' \n", path, position);
#endif
if((pagedata = Httpd_MapData(pages, position-path, path)))
{
*residual = position+1;
break;
}
}
}
}
String_Delete( temp );
temp = NULL;
}
return pagedata;
}
/*@@
@routine StatusUntilIt
@date Tue Sep 19 22:59:34 2000
@author Tom Goodale
@desc
Is the iteration greater than the desired stop value ?
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
static int StatusUntilIt (const cGH *cctkGH)
{
DECLARE_CCTK_PARAMETERS
return (cctkGH && until_it <= cctkGH->cctk_iteration);
}
/*@@
@routine StatusUntilTime
@date Tue Sep 19 23:00:16 2000
@author Tom Goodale
@desc
Is the simulation time greater than the stop value ?
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
static int StatusUntilTime (const cGH *cctkGH)
{
DECLARE_CCTK_PARAMETERS
return (cctkGH && until_time <= cctkGH->cctk_time);
}
/*@@
@routine StatusUntilExpression
@date Tue Sep 19 23:00:47 2000
@author Tom Goodale
@desc
Is the stop expression true ?
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
static int StatusUntilExpression (cGH *cctkGH)
{
DECLARE_CCTK_PARAMETERS
static char *parsed_expression = NULL;
static int times_set = -1;
int retval = 0;
/* See if we need to parse the expression again. */
int new_times_set = CCTK_ParameterQueryTimesSet("until_expression",
CCTK_THORNSTRING);
if(new_times_set > times_set)
{
times_set = new_times_set;
if(parsed_expression)
{
free(parsed_expression);
}
parsed_expression = HTTP_ExpressionParse(until_expression);
}
if(parsed_expression && strlen(parsed_expression) > 0 && cctkGH)
{
/* Make a copy */
char *copy = Util_Strdup(parsed_expression);
/* Evaluate the expression */
retval = HTTP_ExpressionEvaluate(copy, evaluator, cctkGH);
/* Free the copy */
free(copy);
}
return retval;
}
/*@@
@routine evaluator
@date Tue Sep 19 23:07:20 2000
@author Tom Goodale
@desc
Takes the name of a gridscalar and returns its value.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
static double evaluator(const char *expression, void *data)
{
double retval = 0.0;
cGH *cctkGH = (cGH *)data;
int varindex = CCTK_VarIndex(expression);
if(varindex > -1)
{
int vartype = CCTK_VarTypeI(varindex);
int *pointer = CCTK_VarDataPtrI(cctkGH, 0, varindex);
switch(vartype)
{
case CCTK_VARIABLE_BYTE :
retval = *((CCTK_BYTE *)pointer);
break;
case CCTK_VARIABLE_INT :
retval = *((CCTK_INT *)pointer);
break;
case CCTK_VARIABLE_REAL :
retval = *((CCTK_REAL *)pointer);
break;
default :
CCTK_WARN( 0, "Unsupported variable type" );
retval = 0.0;
}
}
else if(CCTK_Equals(expression,"time"))
{
retval = cctkGH->cctk_time;
}
else if(CCTK_Equals(expression,"iteration"))
{
retval = cctkGH->cctk_iteration;
}
else
{
retval = strtod(expression,NULL);
}
return retval;
}
|
