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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.
****************************************************************************/
#define NEED_IGNORE_RET_VAL
#include "maptemplate.h"
#include "maphash.h"
#include "mapserver.h"
#include "maptile.h"
#include "mapows.h"
#include "cpl_conv.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <assert.h>
#include <ctype.h>
static inline void IGUR_sizet(size_t ignored) {
(void)ignored;
} /* Ignore GCC Unused Result */
static inline void IGUR_voidp(void *ignored) {
(void)ignored;
} /* Ignore GCC Unused Result */
static const char *const olUrl = "//www.mapserver.org/lib/OpenLayers-ms60.js";
static const char *const olTemplate =
"<html>\n"
"<head>\n"
"<meta content=\"text/html;charset=utf-8\" http-equiv=\"Content-Type\">\n"
" <title>MapServer Simple Viewer</title>\n"
" <script type=\"text/javascript\" "
"src=\"[openlayers_js_url]\"></script>\n"
" <link rel=\"shortcut icon\" type=\"image/x-icon\" "
"href=\"//www.mapserver.org/_static/mapserver.ico\"/>\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 const char *const olLayerMapServerTag =
"var mslayer = new OpenLayers.Layer.MapServer( \"MapServer Layer\",\n"
" "
"\"[mapserv_onlineresource]\",\n"
" {layers: '[layers]'},\n"
" {singleTile: \"true\", "
"ratio:1} )";
static const char *const 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, const 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(const char *url) {
msIO_setHeader("Status", "302 Found");
msIO_setHeader("Uri", "%s", url);
msIO_setHeader("Location", "%s", 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 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)) {
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 */
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->sendheaders) {
msIO_setHeader("Content-Type", "%s", 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) {
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->sendheaders) {
const char *attachment =
msGetOutputFormatOption(outputFormat, "ATTACHMENT", NULL);
if (attachment)
msIO_setHeader("Content-disposition", "attachment; filename=%s",
attachment);
msIO_setHeader("Content-Type", "%s", 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, const char *pszOrder) {
int *panCurrentOrder = NULL;
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 (int i = 0; i < map->numlayers; i++)
panCurrentOrder[i] = map->layerorder[i];
if (strcasecmp(pszOrder, "DESCENDING") == 0) {
for (int 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 column name
*/
static int sortLayerByMetadata(mapObj *map, const char *pszMetadata) {
int nLegendOrder1;
int nLegendOrder2;
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
* algo instead
*/
for (i = 0; i < map->numlayers - 1; i++) {
for (j = 0; j < map->numlayers - 1 - i; j++) {
const char *pszLegendOrder1 = msLookupHashTable(
&(GET_LAYER(map, map->layerorder[j + 1])->metadata), pszMetadata);
const char *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 beginning of the first occurrence
** of pszTag in pszInstr.
**
** Tag can be [TAG] or [TAG something]
*/
static const char *findTag(const char *pszInstr, const char *pszTag) {
const char *pszStart = NULL;
int done = MS_FALSE;
if (!pszInstr || !pszTag) {
msSetError(MS_WEBERR, "Invalid pointer.", "findTag()");
return NULL;
}
const int length =
strlen(pszTag) + 1; /* adding [ character to the beginning */
char *pszTag1 = (char *)msSmallMalloc(length + 1);
strcpy(pszTag1, "[");
strcat(pszTag1, pszTag);
const char *pszTemp = pszInstr;
do {
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 */
} while (!done);
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.
*/
static int getTagArgs(const char *pszTag, const char *pszInstr,
hashTableObj **ppoHashTable) {
const char *pszStart, *pszEnd;
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 beginning 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 ? */
char *pszArgs = (char *)msSmallMalloc(nLength + 1);
strlcpy(pszArgs, pszStart, nLength + 1);
if (!(*ppoHashTable))
*ppoHashTable = msCreateHashTable();
/* put all arguments separate 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 occurrence found.
*/
static int getInlineTag(const char *pszTag, const char *pszInstr,
char **pszResult) {
const char *pszEnd = NULL;
int nInst = 0;
int nLength;
*pszResult = NULL;
if (!pszInstr || !pszTag) {
msSetError(MS_WEBERR, "Invalid pointer.", "getInlineTag()");
return MS_FAILURE;
}
char *pszEndTag = (char *)msSmallMalloc(strlen(pszTag) + 3);
strcpy(pszEndTag, "[/");
strcat(pszEndTag, pszTag);
/* find start tag */
const char *pszPatIn = findTag(pszInstr, pszTag);
const char *pszPatOut = strstr(pszInstr, pszEndTag);
const char *pszStart = pszPatIn;
const char *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 between 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; */
const char *pszEnd = NULL;
if (!*pszInstr) {
msSetError(MS_WEBERR, "Invalid pointer.", "processIfTag()");
return MS_FAILURE;
}
/* find the if start tag */
const char *pszStart = findTag(*pszInstr, "if");
while (pszStart) {
const char *pszPatIn = findTag(pszStart, "if");
const char *pszPatOut = strstr(pszStart, "[/if]");
const char *pszTmp = pszPatIn;
int nInst = 0;
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 (nInst > 0);
/* get the then string (if expression is true) */
char *pszThen = NULL;
if (getInlineTag("if", pszStart, &pszThen) != MS_SUCCESS) {
msSetError(MS_WEBERR, "Malformed then if tag.", "processIfTag()");
return MS_FAILURE;
}
/* retrieve if tag args */
hashTableObj *ifArgs = NULL;
if (getTagArgs("if", pszStart, &ifArgs) != MS_SUCCESS) {
msSetError(MS_WEBERR, "Malformed args if tag.", "processIfTag()");
return MS_FAILURE;
}
const char *pszName = msLookupHashTable(ifArgs, "name");
const char *pszValue = msLookupHashTable(ifArgs, "value");
const char *pszOperator = msLookupHashTable(ifArgs, "oper");
if (pszOperator == NULL) /* Default operator if not set is "eq" */
pszOperator = "eq";
int 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. */
const int nLength = pszEnd - pszStart;
char *pszIfTag = (char *)msSmallMalloc(nLength + 6);
strlcpy(pszIfTag, pszStart, nLength + 1);
pszIfTag[nLength] = '\0';
strcat(pszIfTag, "[/if]");
const char *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);
free(pszIfTag);
free(pszThen);
msFreeHashTable(ifArgs);
return MS_FAILURE;
}
free(pszIfTag);
}
free(pszThen);
msFreeHashTable(ifArgs);
/* 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 return 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 */
const char *argValue;
char *tag, *tagInstance;
hashTableObj *tagArgs = NULL;
int limit = -1;
const char *trimLast = NULL;
int i, j, status;
if (!*line) {
msSetError(MS_WEBERR, "Invalid line pointer.", "processFeatureTag()");
return (MS_FAILURE);
}
const char *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++) {