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maptemplate.c
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maptemplate.c
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/******************************************************************************
* $id: maptemplate.c 7725 2008-06-21 15:56:58Z sdlime $
*
* Project: MapServer
* Purpose: Various template processing functions.
* Author: Steve Lime and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2008 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "maptemplate.h"
#include "maphash.h"
#include "mapserver.h"
#include "maptile.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <ctype.h>
static char *olUrl = "http://www.mapserver.org/lib/OpenLayers-ms60.js";
static char *olTemplate = \
"<html>\n"
"<head>\n"
" <title>MapServer Simple Viewer</title>\n"
" <script type=\"text/javascript\" src=\"[openlayers_js_url]\"></script>\n"
" </head>\n"
" <body>\n"
" <div style=\"width:[mapwidth]; height:[mapheight]\" id=\"map\"></div>\n"
" <script defer=\"defer\" type=\"text/javascript\">\n"
" var map = new OpenLayers.Map('map',\n"
" {maxExtent: new OpenLayers.Bounds([minx],[miny],[maxx],[maxy]),\n"
" maxResolution: [cellsize]});\n"
" [openlayers_layer];\n"
" map.addLayer(mslayer);\n"
" map.zoomToMaxExtent();\n"
" </script>\n"
"</body>\n"
"</html>";
static char *olLayerMapServerTag = \
"var mslayer = new OpenLayers.Layer.MapServer( \"MapServer Layer\",\n"
" \"[mapserv_onlineresource]\",\n"
" {layers: '[layers]'},\n"
" {singleTile: \"true\", ratio:1} )";
static char *olLayerWMSTag = \
"var mslayer = new OpenLayers.Layer.WMS('MapServer Simple Viewer\',\n"
" '[mapserv_onlineresource]',\n"
" {layers: '[LAYERS]',\n"
" bbox: '[minx],[miny],[maxx],[maxy]',\n"
" width: [mapwidth], height: [mapheight], version: '[VERSION]', format:'[openlayers_format]'},"
" {singleTile: \"true\", ratio:1, projection: '[openlayers_projection]'});\n";
static char *processLine(mapservObj *mapserv, char *instr, FILE *stream, int mode);
static int isValidTemplate(FILE *stream, const char *filename)
{
char buffer[MS_BUFFER_LENGTH];
if(fgets(buffer, MS_BUFFER_LENGTH, stream) != NULL) {
if(!strcasestr(buffer, MS_TEMPLATE_MAGIC_STRING)) {
msSetError(MS_WEBERR, "Missing magic string, %s doesn't look like a MapServer template.", "isValidTemplate()", filename);
return MS_FALSE;
}
}
return MS_TRUE;
}
/*
* Redirect to (only use in CGI)
*
*/
int msRedirect(char *url)
{
msIO_setHeader("Status","302 Found");
msIO_setHeader("Uri",url);
msIO_setHeader("Location",url);
msIO_setHeader("Content-type","text/html");
msIO_sendHeaders();
return MS_SUCCESS;
}
/*
** Sets the map extent under a variety of scenarios.
*/
int setExtent(mapservObj *mapserv)
{
double cellx,celly,cellsize;
if(mapserv->Mode == TILE) {
if(MS_SUCCESS != msTileSetExtent(mapserv)) {
return MS_FAILURE;
}
}
switch(mapserv->CoordSource) {
case FROMUSERBOX: /* user passed in a map extent */
break;
case FROMIMGBOX: /* fully interactive web, most likely with java front end */
cellx = MS_CELLSIZE(mapserv->ImgExt.minx, mapserv->ImgExt.maxx, mapserv->ImgCols);
celly = MS_CELLSIZE(mapserv->ImgExt.miny, mapserv->ImgExt.maxy, mapserv->ImgRows);
mapserv->map->extent.minx = MS_IMAGE2MAP_X(mapserv->ImgBox.minx, mapserv->ImgExt.minx, cellx);
mapserv->map->extent.maxx = MS_IMAGE2MAP_X(mapserv->ImgBox.maxx, mapserv->ImgExt.minx, cellx);
mapserv->map->extent.maxy = MS_IMAGE2MAP_Y(mapserv->ImgBox.miny, mapserv->ImgExt.maxy, celly); /* y's are flip flopped because img/map coordinate systems are */
mapserv->map->extent.miny = MS_IMAGE2MAP_Y(mapserv->ImgBox.maxy, mapserv->ImgExt.maxy, celly);
break;
case FROMIMGPNT:
cellx = MS_CELLSIZE(mapserv->ImgExt.minx, mapserv->ImgExt.maxx, mapserv->ImgCols);
celly = MS_CELLSIZE(mapserv->ImgExt.miny, mapserv->ImgExt.maxy, mapserv->ImgRows);
mapserv->mappnt.x = MS_IMAGE2MAP_X(mapserv->ImgPnt.x, mapserv->ImgExt.minx, cellx);
mapserv->mappnt.y = MS_IMAGE2MAP_Y(mapserv->ImgPnt.y, mapserv->ImgExt.maxy, celly);
mapserv->map->extent.minx = mapserv->mappnt.x - .5*((mapserv->ImgExt.maxx - mapserv->ImgExt.minx)/mapserv->fZoom); /* create an extent around that point */
mapserv->map->extent.miny = mapserv->mappnt.y - .5*((mapserv->ImgExt.maxy - mapserv->ImgExt.miny)/mapserv->fZoom);
mapserv->map->extent.maxx = mapserv->mappnt.x + .5*((mapserv->ImgExt.maxx - mapserv->ImgExt.minx)/mapserv->fZoom);
mapserv->map->extent.maxy = mapserv->mappnt.y + .5*((mapserv->ImgExt.maxy - mapserv->ImgExt.miny)/mapserv->fZoom);
break;
case FROMREFPNT:
cellx = MS_CELLSIZE(mapserv->map->reference.extent.minx, mapserv->map->reference.extent.maxx, mapserv->map->reference.width);
celly = MS_CELLSIZE(mapserv->map->reference.extent.miny, mapserv->map->reference.extent.maxy, mapserv->map->reference.height);
mapserv->mappnt.x = MS_IMAGE2MAP_X(mapserv->RefPnt.x, mapserv->map->reference.extent.minx, cellx);
mapserv->mappnt.y = MS_IMAGE2MAP_Y(mapserv->RefPnt.y, mapserv->map->reference.extent.maxy, celly);
mapserv->map->extent.minx = mapserv->mappnt.x - .5*(mapserv->ImgExt.maxx - mapserv->ImgExt.minx); /* create an extent around that point */
mapserv->map->extent.miny = mapserv->mappnt.y - .5*(mapserv->ImgExt.maxy - mapserv->ImgExt.miny);
mapserv->map->extent.maxx = mapserv->mappnt.x + .5*(mapserv->ImgExt.maxx - mapserv->ImgExt.minx);
mapserv->map->extent.maxy = mapserv->mappnt.y + .5*(mapserv->ImgExt.maxy - mapserv->ImgExt.miny);
break;
case FROMBUF:
mapserv->map->extent.minx = mapserv->mappnt.x - mapserv->Buffer; /* create an extent around that point, using the buffer */
mapserv->map->extent.miny = mapserv->mappnt.y - mapserv->Buffer;
mapserv->map->extent.maxx = mapserv->mappnt.x + mapserv->Buffer;
mapserv->map->extent.maxy = mapserv->mappnt.y + mapserv->Buffer;
break;
case FROMSCALE:
cellsize = (mapserv->ScaleDenom/mapserv->map->resolution)/msInchesPerUnit(mapserv->map->units,0); /* user supplied a point and a scale denominator */
mapserv->map->extent.minx = mapserv->mappnt.x - cellsize*(mapserv->map->width-1)/2.0;
mapserv->map->extent.miny = mapserv->mappnt.y - cellsize*(mapserv->map->height-1)/2.0;
mapserv->map->extent.maxx = mapserv->mappnt.x + cellsize*(mapserv->map->width-1)/2.0;
mapserv->map->extent.maxy = mapserv->mappnt.y + cellsize*(mapserv->map->height-1)/2.0;
break;
default: /* use the default in the mapfile if it exists */
if((mapserv->map->extent.minx == mapserv->map->extent.maxx) && (mapserv->map->extent.miny == mapserv->map->extent.maxy)) {
msSetError(MS_WEBERR, "No way to generate map extent.", "mapserv()");
return MS_FAILURE;
}
}
mapserv->RawExt = mapserv->map->extent; /* save unaltered extent */
return MS_SUCCESS;
}
int checkWebExtent(mapservObj *mapserv)
{
return MS_SUCCESS;
}
int checkWebScale(mapservObj *mapserv)
{
int status;
rectObj work_extent = mapserv->map->extent;
mapserv->map->cellsize = msAdjustExtent(&(work_extent), mapserv->map->width, mapserv->map->height); /* we do this cause we need a scale */
if((status = msCalculateScale(work_extent, mapserv->map->units, mapserv->map->width, mapserv->map->height, mapserv->map->resolution, &mapserv->map->scaledenom)) != MS_SUCCESS) return status;
if((mapserv->map->scaledenom < mapserv->map->web.minscaledenom) && (mapserv->map->web.minscaledenom > 0)) {
if(mapserv->map->web.mintemplate) { /* use the template provided */
if(TEMPLATE_TYPE(mapserv->map->web.mintemplate) == MS_FILE) {
if((status = msReturnPage(mapserv, mapserv->map->web.mintemplate, BROWSE, NULL)) != MS_SUCCESS) return status;
} else {
if((status = msReturnURL(mapserv, mapserv->map->web.mintemplate, BROWSE)) != MS_SUCCESS) return status;
}
} else { /* force zoom = 1 (i.e. pan) */
mapserv->fZoom = mapserv->Zoom = 1;
mapserv->ZoomDirection = 0;
mapserv->CoordSource = FROMSCALE;
mapserv->ScaleDenom = mapserv->map->web.minscaledenom;
mapserv->mappnt.x = (mapserv->map->extent.maxx + mapserv->map->extent.minx)/2; /* use center of bad extent */
mapserv->mappnt.y = (mapserv->map->extent.maxy + mapserv->map->extent.miny)/2;
setExtent(mapserv);
mapserv->map->cellsize = msAdjustExtent(&(mapserv->map->extent), mapserv->map->width, mapserv->map->height);
if((status = msCalculateScale(mapserv->map->extent, mapserv->map->units, mapserv->map->width, mapserv->map->height, mapserv->map->resolution, &mapserv->map->scaledenom)) != MS_SUCCESS) return status;
}
} else {
if((mapserv->map->scaledenom > mapserv->map->web.maxscaledenom) && (mapserv->map->web.maxscaledenom > 0)) {
if(mapserv->map->web.maxtemplate) { /* use the template provided */
if(TEMPLATE_TYPE(mapserv->map->web.maxtemplate) == MS_FILE) {
if((status = msReturnPage(mapserv, mapserv->map->web.maxtemplate, BROWSE, NULL)) != MS_SUCCESS) return status;
} else {
if((status = msReturnURL(mapserv, mapserv->map->web.maxtemplate, BROWSE)) != MS_SUCCESS) return status;
}
} else { /* force zoom = 1 (i.e. pan) */
mapserv->fZoom = mapserv->Zoom = 1;
mapserv->ZoomDirection = 0;
mapserv->CoordSource = FROMSCALE;
mapserv->ScaleDenom = mapserv->map->web.maxscaledenom;
mapserv->mappnt.x = (mapserv->map->extent.maxx + mapserv->map->extent.minx)/2; /* use center of bad extent */
mapserv->mappnt.y = (mapserv->map->extent.maxy + mapserv->map->extent.miny)/2;
setExtent(mapserv);
mapserv->map->cellsize = msAdjustExtent(&(mapserv->map->extent), mapserv->map->width, mapserv->map->height);
if((status = msCalculateScale(mapserv->map->extent, mapserv->map->units, mapserv->map->width, mapserv->map->height, mapserv->map->resolution, &mapserv->map->scaledenom)) != MS_SUCCESS) return status;
}
}
}
return MS_SUCCESS;
}
int msReturnTemplateQuery(mapservObj *mapserv, char *queryFormat, char **papszBuffer)
{
imageObj *img = NULL;
int i, status;
outputFormatObj *outputFormat=NULL;
mapObj *map = mapserv->map;
if(!queryFormat) {
msSetError(MS_WEBERR, "Return format/mime-type not specified.", "msReturnTemplateQuery()");
return MS_FAILURE;
}
msApplyDefaultOutputFormats(map);
i = msGetOutputFormatIndex(map, queryFormat); /* queryFormat can be a mime-type or name */
if(i >= 0) outputFormat = map->outputformatlist[i];
if(outputFormat) {
if( MS_RENDERER_PLUGIN(outputFormat) ) {
msInitializeRendererVTable(outputFormat);
}
if( MS_RENDERER_OGR(outputFormat) ) {
if( mapserv != NULL )
checkWebScale(mapserv);
status = msOGRWriteFromQuery(map, outputFormat, mapserv->sendheaders);
return status;
}
if( !MS_RENDERER_TEMPLATE(outputFormat) ) { /* got an image format, return the query results that way */
outputFormatObj *tempOutputFormat = map->outputformat; /* save format */
if( mapserv != NULL )
checkWebScale(mapserv);
map->outputformat = outputFormat; /* override what was given for IMAGETYPE */
img = msDrawMap(map, MS_TRUE);
if(!img) return MS_FAILURE;
map->outputformat = tempOutputFormat; /* restore format */
if(mapserv == NULL || mapserv->sendheaders) {
msIO_setHeader("Content-type", MS_IMAGE_MIME_TYPE(outputFormat));
msIO_sendHeaders();
}
status = msSaveImage(map, img, NULL);
msFreeImage(img);
return status;
}
}
/*
** At this point we know we have a template of some sort, either the new style that references a or the old
** style made up of external files slammed together. Either way we may have to compute a query map and other
** images. We only create support images IF the querymap has status=MS_ON.
*/
if(map->querymap.status && mapserv != NULL ) {
checkWebScale(mapserv);
if(msGenerateImages(mapserv, MS_TRUE, MS_TRUE) != MS_SUCCESS)
return MS_FAILURE;
}
if(outputFormat) {
const char *file = msGetOutputFormatOption( outputFormat, "FILE", NULL );
if(!file) {
msSetError(MS_WEBERR, "Template driver requires \"FILE\" format option be set.", "msReturnTemplateQuery()");
return MS_FAILURE;
}
if(mapserv == NULL || mapserv->sendheaders) {
const char *attachment = msGetOutputFormatOption( outputFormat, "ATTACHMENT", NULL );
if(attachment)
msIO_setHeader("Content-disposition","attachment; filename=%s", attachment);
msIO_setHeader("Content-type", outputFormat->mimetype);
msIO_sendHeaders();
}
if((status = msReturnPage(mapserv, (char *) file, BROWSE, papszBuffer)) != MS_SUCCESS)
return status;
} else {
if((status = msReturnNestedTemplateQuery(mapserv, queryFormat, papszBuffer)) != MS_SUCCESS)
return status;
}
return MS_SUCCESS;
}
/*
** Is a particular layer or group on, that is was it requested explicitly by the user.
*/
int isOn(mapservObj *mapserv, char *name, char *group)
{
int i;
for(i=0; i<mapserv->NumLayers; i++) {
if(name && strcmp(mapserv->Layers[i], name) == 0) return(MS_TRUE);
if(group && strcmp(mapserv->Layers[i], group) == 0) return(MS_TRUE);
}
return(MS_FALSE);
}
/************************************************************************/
/* int sortLayerByOrder(mapObj *map, char* pszOrder) */
/* */
/* sorth the displaying in ascending or descending order. */
/************************************************************************/
int sortLayerByOrder(mapObj *map, char* pszOrder)
{
int *panCurrentOrder = NULL;
int i = 0;
if(!map) {
msSetError(MS_WEBERR, "Invalid pointer.", "sortLayerByOrder()");
return MS_FAILURE;
}
/* ==================================================================== */
/* The flag "ascending" is in fact not useful since the */
/* default ordering is ascending. */
/* ==================================================================== */
/* -------------------------------------------------------------------- */
/* the map->layerorder should be set at this point in the */
/* sortLayerByMetadata. */
/* -------------------------------------------------------------------- */
if(map->layerorder) {
panCurrentOrder = (int*)msSmallMalloc(map->numlayers * sizeof(int));
for (i=0; i<map->numlayers ; i++)
panCurrentOrder[i] = map->layerorder[i];
if(strcasecmp(pszOrder, "DESCENDING") == 0) {
for (i=0; i<map->numlayers; i++)
map->layerorder[i] = panCurrentOrder[map->numlayers-1-i];
}
free(panCurrentOrder);
}
return MS_SUCCESS;
}
/*!
* This function set the map->layerorder
* index order by the metadata collumn name
*/
int sortLayerByMetadata(mapObj *map, char* pszMetadata)
{
int nLegendOrder1;
int nLegendOrder2;
char *pszLegendOrder1;
char *pszLegendOrder2;
int i, j;
int tmp;
if(!map) {
msSetError(MS_WEBERR, "Invalid pointer.", "sortLayerByMetadata()");
return MS_FAILURE;
}
/*
* Initiate to default order (Reverse mapfile order)
*/
if(map->layerorder) {
int *pnLayerOrder;
/* Backup the original layer order to be able to reverse it */
pnLayerOrder = (int*)msSmallMalloc(map->numlayers * sizeof(int));
for (i=0; i<map->numlayers ; i++)
pnLayerOrder[i] = map->layerorder[i];
/* Get a new layerorder array */
free(map->layerorder);
map->layerorder = (int*)msSmallMalloc(map->numlayers * sizeof(int));
/* Reverse the layerorder array */
for (i=0; i<map->numlayers ; i++)
map->layerorder[i] = pnLayerOrder[map->numlayers - i - 1];
free(pnLayerOrder);
} else {
map->layerorder = (int*)msSmallMalloc(map->numlayers * sizeof(int));
for (i=0; i<map->numlayers ; i++)
map->layerorder[i] = map->numlayers - i - 1;
}
if(!pszMetadata)
return MS_SUCCESS;
/*
* Bubble sort algo (not very efficient)
* should implement a kind of quick sort
* alog instead
*/
for (i=0; i<map->numlayers-1; i++) {
for (j=0; j<map->numlayers-1-i; j++) {
pszLegendOrder1 = msLookupHashTable(&(GET_LAYER(map, map->layerorder[j+1])->metadata), pszMetadata);
pszLegendOrder2 = msLookupHashTable(&(GET_LAYER(map, map->layerorder[j])->metadata), pszMetadata);
if(!pszLegendOrder1 || !pszLegendOrder2)
continue;
nLegendOrder1 = atoi(pszLegendOrder1);
nLegendOrder2 = atoi(pszLegendOrder2);
if(nLegendOrder1 < nLegendOrder2) { /* compare the two neighbors */
tmp = map->layerorder[j]; /* swap a[j] and a[j+1] */
map->layerorder[j] = map->layerorder[j+1];
map->layerorder[j+1] = tmp;
}
}
}
return MS_SUCCESS;
}
/*
** This function return a pointer
** at the begining of the first occurence
** of pszTag in pszInstr.
**
** Tag can be [TAG] or [TAG something]
*/
char *findTag(char *pszInstr, char *pszTag)
{
char *pszTag1, *pszStart=NULL;
char *pszTemp;
int done=MS_FALSE;
int length;
if(!pszInstr || !pszTag) {
msSetError(MS_WEBERR, "Invalid pointer.", "findTag()");
return NULL;
}
length = strlen(pszTag) + 1; /* adding [ character to the beginning */
pszTag1 = (char*) msSmallMalloc(length+1);
strcpy(pszTag1, "[");
strcat(pszTag1, pszTag);
pszTemp = pszInstr;
while(!done) {
pszStart = strstr(pszTemp, pszTag1);
if(pszStart == NULL)
done = MS_TRUE; /* tag not found */
else if((*(pszStart+length) == ']' || *(pszStart+length) == ' '))
done = MS_TRUE; /* valid tag */
else
pszTemp += length; /* skip ahead and start over */
}
free(pszTag1);
return pszStart;
}
/*
** This function return a pointer
** to the end of the tag in pszTag
**
** The end of a tag is the next
** non-quoted ']' character.
** Return NULL if not found.
*/
char *findTagEnd(const char *pszTag)
{
char *pszEnd = NULL,
*pszTmp = (char*)pszTag;
while (pszTmp != NULL) {
if (*pszTmp == '"')
pszTmp = strchr(pszTmp+1,'"');
if ((pszTmp == NULL) || (*pszTmp == ']')) {
pszEnd = pszTmp;
pszTmp = NULL;
} else
pszTmp++;
}
return pszEnd;
}
/*
** Return a hashtableobj from instr of all
** arguments. hashtable must be freed by caller.
*/
int getTagArgs(char* pszTag, char* pszInstr, hashTableObj **ppoHashTable)
{
char *pszStart, *pszEnd, *pszArgs;
int nLength;
char **papszArgs, **papszVarVal;
int nArgs, nDummy;
int i;
if(!pszTag || !pszInstr) {
msSetError(MS_WEBERR, "Invalid pointer.", "getTagArgs()");
return MS_FAILURE;
}
/* set position to the begining of tag */
pszStart = findTag(pszInstr, pszTag);
if(pszStart) {
/* find ending position */
pszEnd = findTagEnd(pszStart);
if(pszEnd) {
/* skip the tag name */
pszStart = pszStart + strlen(pszTag) + 1;
/* get length of all args */
nLength = pszEnd - pszStart;
if(nLength > 0) { /* is there arguments ? */
pszArgs = (char*)msSmallMalloc(nLength + 1);
strlcpy(pszArgs, pszStart, nLength+1);
if(!(*ppoHashTable))
*ppoHashTable = msCreateHashTable();
/* put all arguments seperate by space in a hash table */
papszArgs = msStringTokenize(pszArgs, " ", &nArgs, MS_TRUE);
/* msReturnTemplateQuerycheck all argument if they have values */
for (i=0; i<nArgs; i++) {
if(strlen(papszArgs[i]) == 0) {
free(papszArgs[i]);
continue;
}
if(strchr(papszArgs[i], '=')) {
papszVarVal = msStringTokenize(papszArgs[i], "=", &nDummy, MS_FALSE);
msInsertHashTable(*ppoHashTable, papszVarVal[0],
papszVarVal[1]);
free(papszVarVal[0]);
free(papszVarVal[1]);
free(papszVarVal);
} else /* no value specified. set it to 1 */
msInsertHashTable(*ppoHashTable, papszArgs[i], "1");
free(papszArgs[i]);
}
free(papszArgs);
free(pszArgs);
}
}
}
return MS_SUCCESS;
}
/*
** Return a substring from instr between [tag] and [/tag]
** char * returned must be freed by caller.
** pszNextInstr will be a pointer at the end of the
** first occurence found.
*/
int getInlineTag(char *pszTag, char *pszInstr, char **pszResult)
{
char *pszStart, *pszEnd=NULL, *pszEndTag, *pszPatIn, *pszPatOut=NULL, *pszTmp;
int nInst=0;
int nLength;
*pszResult = NULL;
if(!pszInstr || !pszTag) {
msSetError(MS_WEBERR, "Invalid pointer.", "getInlineTag()");
return MS_FAILURE;
}
pszEndTag = (char*)msSmallMalloc(strlen(pszTag) + 3);
strcpy(pszEndTag, "[/");
strcat(pszEndTag, pszTag);
/* find start tag */
pszPatIn = findTag(pszInstr, pszTag);
pszPatOut = strstr(pszInstr, pszEndTag);
pszStart = pszPatIn;
pszTmp = pszInstr;
if(pszPatIn) {
do {
if(pszPatIn && pszPatIn < pszPatOut) {
nInst++;
pszTmp = pszPatIn;
}
if(pszPatOut && ((pszPatIn == NULL) || pszPatOut < pszPatIn)) {
pszEnd = pszPatOut;
nInst--;
pszTmp = pszPatOut;
}
pszPatIn = findTag(pszTmp+1, pszTag);
pszPatOut = strstr(pszTmp+1, pszEndTag);
} while (pszTmp != NULL && nInst > 0);
}
if(pszStart && pszEnd) {
/* find end of start tag */
pszStart = strchr(pszStart, ']');
if(pszStart) {
pszStart++;
nLength = pszEnd - pszStart;
if(nLength > 0) {
*pszResult = (char*)msSmallMalloc(nLength + 1);
/* copy string beetween start and end tag */
strlcpy(*pszResult, pszStart, nLength+1);
(*pszResult)[nLength] = '\0';
}
} else {
msSetError(MS_WEBERR, "Malformed [%s] tag.", "getInlineTag()", pszTag);
return MS_FAILURE;
}
}
msFree(pszEndTag);
return MS_SUCCESS;
}
/*!
* this function process all if tag in pszInstr.
* this function return a modified pszInstr.
* ht mus contain all variables needed by the function
* to interpret if expression.
*
* If bLastPass is true then all tests for 'null' values will be
* considered true if the corresponding value is not set.
*/
int processIfTag(char **pszInstr, hashTableObj *ht, int bLastPass)
{
/* char *pszNextInstr = pszInstr; */
char *pszStart, *pszEnd=NULL;
char *pszName, *pszValue, *pszOperator, *pszThen=NULL, *pszHTValue;
char *pszIfTag;
char *pszPatIn=NULL, *pszPatOut=NULL, *pszTmp;
int nInst = 0;
int bEmpty = 0;
int nLength;
hashTableObj *ifArgs=NULL;
if(!*pszInstr) {
msSetError(MS_WEBERR, "Invalid pointer.", "processIfTag()");
return MS_FAILURE;
}
/* find the if start tag */
pszStart = findTag(*pszInstr, "if");
while (pszStart) {
pszPatIn = findTag(pszStart, "if");
pszPatOut = strstr(pszStart, "[/if]");
pszTmp = pszPatIn;
do {
if(pszPatIn && pszPatIn < pszPatOut) {
nInst++;
pszTmp = pszPatIn;
}
if(pszPatOut && ((pszPatIn == NULL) || pszPatOut < pszPatIn)) {
pszEnd = pszPatOut;
nInst--;
pszTmp = pszPatOut;
}
pszPatIn = findTag(pszTmp+1, "if");
pszPatOut = strstr(pszTmp+1, "[/if]");
} while (pszTmp != NULL && nInst > 0);
/* get the then string (if expression is true) */
if(getInlineTag("if", pszStart, &pszThen) != MS_SUCCESS) {
msSetError(MS_WEBERR, "Malformed then if tag.", "processIfTag()");
return MS_FAILURE;
}
/* retrieve if tag args */
if(getTagArgs("if", pszStart, &ifArgs) != MS_SUCCESS) {
msSetError(MS_WEBERR, "Malformed args if tag.", "processIfTag()");
return MS_FAILURE;
}
pszName = msLookupHashTable(ifArgs, "name");
pszValue = msLookupHashTable(ifArgs, "value");
pszOperator = msLookupHashTable(ifArgs, "oper");
if(pszOperator == NULL) /* Default operator if not set is "eq" */
pszOperator = "eq";
bEmpty = 0;
if(pszName) {
/* build the complete if tag ([if all_args]then string[/if]) */
/* to replace if by then string if expression is true */
/* or by a white space if not. */
nLength = pszEnd - pszStart;
pszIfTag = (char*)msSmallMalloc(nLength + 6);
strlcpy(pszIfTag, pszStart, nLength+1);
pszIfTag[nLength] = '\0';
strcat(pszIfTag, "[/if]");
pszHTValue = msLookupHashTable(ht, pszName);
if(strcmp(pszOperator, "neq") == 0) {
if(pszValue && pszHTValue && strcasecmp(pszValue, pszHTValue) != 0) {
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, pszThen);
} else if(pszHTValue) {
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, "");
bEmpty = 1;
}
} else if(strcmp(pszOperator, "eq") == 0) {
if(pszValue && pszHTValue && strcasecmp(pszValue, pszHTValue) == 0) {
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, pszThen);
} else if(pszHTValue) {
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, "");
bEmpty = 1;
}
} else if(strcmp(pszOperator, "isnull") == 0) {
if(pszHTValue != NULL) {
/* We met a non-null value... condition is false */
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, "");
bEmpty = 1;
} else if(bLastPass) {
/* On last pass, if value is still null then condition is true */
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, pszThen);
}
} else if(strcmp(pszOperator, "isset") == 0) {
if(pszHTValue != NULL) {
/* Found a non-null value... condition is true */
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, pszThen);
} else if(bLastPass) {
/* On last pass, if value still not set then condition is false */
*pszInstr = msReplaceSubstring(*pszInstr, pszIfTag, "");
bEmpty = 1;
}
} else {
msSetError(MS_WEBERR, "Unsupported operator (%s) in if tag.", "processIfTag()", pszOperator);
return MS_FAILURE;
}
if(pszIfTag)
free(pszIfTag);
pszIfTag = NULL;
}
if(pszThen)
free (pszThen);
pszThen=NULL;
msFreeHashTable(ifArgs);
ifArgs=NULL;
/* find the if start tag */
if(bEmpty)
pszStart = findTag(pszStart, "if");
else
pszStart = findTag(pszStart + 1, "if");
}
return MS_SUCCESS;
}
/* Helper function to return the text before the supplied string2 in string1. */
static char *getPreTagText(const char *string1, const char *string2)
{
int n;
char *result, *tmpstr;
if((tmpstr = strstr(string1, string2)) == NULL) return msStrdup(""); /* return an empty string */
n = strlen(string1) - strlen(tmpstr);
result = (char *) msSmallMalloc(n + 1);
strlcpy(result, string1, n+1);
return result;
}
/* Helper function to retunr the text after the supplied string2 in string1. */
static char *getPostTagText(const char *string1, const char *string2)
{
char *tmpstr;
if((tmpstr = strstr(string1, string2)) == NULL) return msStrdup(""); /* return an empty string */
tmpstr += strlen(string2); /* skip string2 */
return msStrdup(tmpstr);
}
/*
** Function to process a [feature ...] tag. This tag can *only* be found within
** a [resultset ...][/resultset] block.
*/
static int processFeatureTag(mapservObj *mapserv, char **line, layerObj *layer)
{
char *preTag, *postTag; /* text before and after the tag */
char *argValue;
char *tag, *tagInstance, *tagStart;
hashTableObj *tagArgs=NULL;
int limit=-1;
char *trimLast=NULL;
int i, j, status;
if(!*line) {
msSetError(MS_WEBERR, "Invalid line pointer.", "processFeatureTag()");
return(MS_FAILURE);
}
tagStart = findTag(*line, "feature");
if(!tagStart) return(MS_SUCCESS); /* OK, just return; */
/* check for any tag arguments */
if(getTagArgs("feature", tagStart, &tagArgs) != MS_SUCCESS) return(MS_FAILURE);
if(tagArgs) {
argValue = msLookupHashTable(tagArgs, "limit");
if(argValue) limit = atoi(argValue);
argValue = msLookupHashTable(tagArgs, "trimlast");
if(argValue) trimLast = argValue;
}
if(strstr(*line, "[/feature]") == NULL) { /* we know the closing tag must be here, if not throw an error */
msSetError(MS_WEBERR, "[feature] tag found without closing [/feature].", "processFeatureTag()");
msFreeHashTable(tagArgs);
return(MS_FAILURE);
}
if(getInlineTag("feature", *line, &tag) != MS_SUCCESS) {
msSetError(MS_WEBERR, "Malformed feature tag.", "processFeatureTag()");
msFreeHashTable(tagArgs);
return MS_FAILURE;
}
preTag = getPreTagText(*line, "[feature");
postTag = getPostTagText(*line, "[/feature]");
/* start rebuilding **line */
free(*line);
*line = preTag;
/* we know the layer has query results or we wouldn't be in this code */
#if 0
status = msLayerOpen(layer); /* open the layer */
if(status != MS_SUCCESS) return status;
status = msLayerGetItems(layer); /* retrieve all the item names */
if(status != MS_SUCCESS) return status;
#endif
if(layer->numjoins > 0) { /* initialize necessary JOINs here */
for(j=0; j<layer->numjoins; j++) {
status = msJoinConnect(layer, &(layer->joins[j]));
if(status != MS_SUCCESS) {
msFreeHashTable(tagArgs);
return status;
}
}
}
mapserv->LRN = 1; /* layer result counter */
mapserv->resultlayer = layer;
msInitShape(&(mapserv->resultshape));
if(limit == -1) /* return all */
limit = layer->resultcache->numresults;
else
limit = MS_MIN(limit, layer->resultcache->numresults);
for(i=0; i<limit; i++) {
status = msLayerGetShape(layer, &(mapserv->resultshape), &(layer->resultcache->results[i]));
if(status != MS_SUCCESS) {
msFreeHashTable(tagArgs);
return status;
}
mapserv->resultshape.classindex = msShapeGetClass(layer, layer->map, &mapserv->resultshape, NULL, -1);
if(mapserv->resultshape.classindex >=0 && layer->class[mapserv->resultshape.classindex]->numlabels > 0)
msShapeGetAnnotation(layer, &mapserv->resultshape); // RFC 77 TODO: check return value
/* prepare any necessary JOINs here (one-to-one only) */
if(layer->numjoins > 0) {
for(j=0; j<layer->numjoins; j++) {
if(layer->joins[j].type == MS_JOIN_ONE_TO_ONE) {
msJoinPrepare(&(layer->joins[j]), &(mapserv->resultshape));
msJoinNext(&(layer->joins[j])); /* fetch the first row */
}
}
}
/*
** if necessary trim a few characters off the end of the tag
*/
if(trimLast && (i == limit-1)) {
char *ptr;
if((ptr = strrstr(tag, trimLast)) != NULL)
*ptr = '\0';
}
/* process the tag */
tagInstance = processLine(mapserv, tag, NULL, QUERY); /* do substitutions */
*line = msStringConcatenate(*line, tagInstance); /* grow the line */
free(tagInstance);
msFreeShape(&(mapserv->resultshape)); /* init too */
mapserv->RN++; /* increment counters */
mapserv->LRN++;
}
/* msLayerClose(layer); */
mapserv->resultlayer = NULL; /* necessary? */
*line = msStringConcatenate(*line, postTag);
/*
** clean up
*/
free(postTag);
free(tag);
msFreeHashTable(tagArgs);
return(MS_SUCCESS);
}
/*
** Function to process a [resultset ...] tag.
*/
static int processResultSetTag(mapservObj *mapserv, char **line, FILE *stream)
{
char lineBuffer[MS_BUFFER_LENGTH];
int foundTagEnd;
char *preTag, *postTag; /* text before and after the tag */
char *tag, *tagStart;
hashTableObj *tagArgs=NULL;
char *layerName=NULL;
char *nodata=NULL;
int layerIndex=-1;
layerObj *lp;