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mapwcs20.c
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mapwcs20.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: OpenGIS Web Coverage Server (WCS) 2.0 implementation.
* Author: Stephan Meissl <stephan.meissl@eox.at>
* Fabian Schindler <fabian.schindler@eox.at>
* and the MapServer team.
*
******************************************************************************
* Copyright (c) 2010, 2011 EOX IT Services GmbH, Austria
*
* 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 "mapserver-config.h"
#if defined(USE_WCS_SVR)
#include <assert.h>
#include "mapserver.h"
#include "maperror.h"
#include "mapthread.h"
#include "mapows.h"
#include "mapwcs.h"
#include <float.h>
#include "gdal.h"
#include "cpl_port.h"
#include "maptime.h"
#include "mapprimitive.h"
#include "cpl_string.h"
#include <proj_api.h>
#include <string.h>
#if defined(USE_LIBXML2)
#include <libxml/tree.h>
#include "maplibxml2.h"
#include <libxml/parser.h>
#endif /* defined(USE_LIBXML2) */
/************************************************************************/
/* msStringParseInteger() */
/* */
/* Tries to parse a string as a integer value. If not possible */
/* the value MS_WCS20_UNBOUNDED is stored as value. */
/* If no characters could be parsed, MS_FAILURE is returned. If at */
/* least some characters could be parsed, MS_DONE is returned and */
/* only if all characters could be parsed, MS_SUCCESS is returned. */
/************************************************************************/
static int msStringParseInteger(const char *string, int *dest)
{
char *parse_check;
*dest = (int)strtol(string, &parse_check, 0);
if(parse_check == string) {
return MS_FAILURE;
} else if(parse_check - strlen(string) != string) {
return MS_DONE;
}
return MS_SUCCESS;
}
/************************************************************************/
/* msStringParseDouble() */
/* */
/* Tries to parse a string as a double value. If not possible */
/* the value 0 is stored as value. */
/* If no characters could be parsed, MS_FAILURE is returned. If at */
/* least some characters could be parsed, MS_DONE is returned and */
/* only if all characters could be parsed, MS_SUCCESS is returned. */
/************************************************************************/
static int msStringParseDouble(const char *string, double *dest)
{
char *parse_check = NULL;
*dest = strtod(string, &parse_check);
if(parse_check == string) {
return MS_FAILURE;
} else if(parse_check - strlen(string) != string) {
return MS_DONE;
}
return MS_SUCCESS;
}
/************************************************************************/
/* msWCSParseTimeOrScalar20() */
/* */
/* Parses a string, either as a time or a scalar value and */
/* writes the output into the timeScalarUnion. */
/************************************************************************/
static int msWCSParseTimeOrScalar20(timeScalarUnion *u, const char *string)
{
struct tm time;
if (string) {
while(*string == ' ')
string ++;
}
if (!string || strlen(string) == 0 || !u) {
msSetError(MS_WCSERR, "Invalid string", "msWCSParseTimeOrScalar20()");
return MS_WCS20_ERROR_VALUE;
}
/* if the string is equal to "*" it means the value
* of the interval is unbounded */
if (EQUAL(string, "*")) {
u->scalar = MS_WCS20_UNBOUNDED;
u->unbounded = 1;
return MS_WCS20_UNDEFINED_VALUE;
}
/* if returned a valid value, use it */
if (msStringParseDouble(string, &(u->scalar)) == MS_SUCCESS) {
return MS_WCS20_SCALAR_VALUE;
}
/* otherwise it might be a time value */
msTimeInit(&time);
if (msParseTime(string, &time) == MS_TRUE) {
u->time = mktime(&time);
return MS_WCS20_TIME_VALUE;
}
/* the value could neither be parsed as a double nor as a time value */
else {
msSetError(MS_WCSERR,
"String %s could not be parsed to a time or scalar value",
"msWCSParseTimeOrScalar20()",string);
return MS_WCS20_ERROR_VALUE;
}
}
/************************************************************************/
/* msWCSCreateSubsetObj20() */
/* */
/* Creates a new wcs20SubsetObj and initializes it to standard */
/* values. */
/************************************************************************/
static wcs20SubsetObjPtr msWCSCreateSubsetObj20()
{
wcs20SubsetObjPtr subset = (wcs20SubsetObjPtr) malloc(sizeof(wcs20SubsetObj));
MS_CHECK_ALLOC(subset, sizeof(wcs20SubsetObj), NULL);
subset->axis = NULL;
subset->crs = NULL;
subset->min.scalar = subset->max.scalar = MS_WCS20_UNBOUNDED;
subset->min.unbounded = subset->max.unbounded = 0;
subset->operation = MS_WCS20_SLICE;
return subset;
}
/************************************************************************/
/* msWCSFreeSubsetObj20() */
/* */
/* Frees a wcs20SubsetObj and releases all linked resources. */
/************************************************************************/
static void msWCSFreeSubsetObj20(wcs20SubsetObjPtr subset)
{
if (NULL == subset) {
return;
}
msFree(subset->axis);
msFree(subset->crs);
msFree(subset);
}
/************************************************************************/
/* msWCSCreateAxisObj20() */
/* */
/* Creates a new wcs20AxisObj and initializes it to standard */
/* values. */
/************************************************************************/
static wcs20AxisObjPtr msWCSCreateAxisObj20()
{
wcs20AxisObj *axis = (wcs20AxisObjPtr)malloc(sizeof(wcs20AxisObj));
MS_CHECK_ALLOC(axis, sizeof(wcs20AxisObj), NULL);
axis->name = NULL;
axis->size = 0;
axis->resolution = MS_WCS20_UNBOUNDED;
axis->scale = MS_WCS20_UNBOUNDED;
axis->resolutionUOM = NULL;
axis->subset = NULL;
return axis;
}
/************************************************************************/
/* msWCSFreeAxisObj20() */
/* */
/* Frees a wcs20AxisObj and releases all linked resources. */
/************************************************************************/
static void msWCSFreeAxisObj20(wcs20AxisObjPtr axis)
{
if(NULL == axis) {
return;
}
msFree(axis->name);
msFree(axis->resolutionUOM);
msWCSFreeSubsetObj20(axis->subset);
msFree(axis);
}
/************************************************************************/
/* msWCSFindAxis20() */
/* */
/* Helper function to retrieve an axis by the name from a params */
/* object. */
/************************************************************************/
static wcs20AxisObjPtr msWCSFindAxis20(wcs20ParamsObjPtr params,
const char *name)
{
int i = 0;
for(i = 0; i < params->numaxes; ++i) {
if(EQUAL(params->axes[i]->name, name)) {
return params->axes[i];
}
}
return NULL;
}
/************************************************************************/
/* msWCSInsertAxisObj20() */
/* */
/* Helper function to insert an axis object into the axes list of */
/* a params object. */
/************************************************************************/
static void msWCSInsertAxisObj20(wcs20ParamsObjPtr params, wcs20AxisObjPtr axis)
{
params->numaxes++;
params->axes = (wcs20AxisObjPtr*) msSmallRealloc(params->axes,
sizeof(wcs20AxisObjPtr) * (params->numaxes));
params->axes[params->numaxes - 1] = axis;
}
/************************************************************************/
/* msWCSCreateParamsObj20() */
/* */
/* Creates a new wcs20ParamsObj and initializes it to standard */
/* values. */
/************************************************************************/
wcs20ParamsObjPtr msWCSCreateParamsObj20()
{
wcs20ParamsObjPtr params
= (wcs20ParamsObjPtr) malloc(sizeof(wcs20ParamsObj));
MS_CHECK_ALLOC(params, sizeof(wcs20ParamsObj), NULL);
params->version = NULL;
params->request = NULL;
params->service = NULL;
params->accept_versions = NULL;
params->sections = NULL;
params->updatesequence = NULL;
params->ids = NULL;
params->width = 0;
params->height = 0;
params->resolutionX = MS_WCS20_UNBOUNDED;
params->resolutionY = MS_WCS20_UNBOUNDED;
params->scale = MS_WCS20_UNBOUNDED;
params->scaleX = MS_WCS20_UNBOUNDED;
params->scaleY = MS_WCS20_UNBOUNDED;
params->resolutionUnits = NULL;
params->numaxes = 0;
params->axes = NULL;
params->format = NULL;
params->multipart = 0;
params->interpolation = NULL;
params->outputcrs = NULL;
params->subsetcrs = NULL;
params->bbox.minx = params->bbox.miny = -DBL_MAX;
params->bbox.maxx = params->bbox.maxy = DBL_MAX;
params->range_subset = NULL;
params->format_options = NULL;
return params;
}
/************************************************************************/
/* msWCSFreeParamsObj20() */
/* */
/* Frees a wcs20ParamsObj and releases all linked resources. */
/************************************************************************/
void msWCSFreeParamsObj20(wcs20ParamsObjPtr params)
{
if (NULL == params) {
return;
}
msFree(params->version);
msFree(params->request);
msFree(params->service);
CSLDestroy(params->accept_versions);
CSLDestroy(params->sections);
msFree(params->updatesequence);
CSLDestroy(params->ids);
msFree(params->resolutionUnits);
msFree(params->format);
msFree(params->interpolation);
msFree(params->outputcrs);
msFree(params->subsetcrs);
while(params->numaxes > 0) {
params->numaxes -= 1;
msWCSFreeAxisObj20(params->axes[params->numaxes]);
}
msFree(params->axes);
CSLDestroy(params->range_subset);
CSLDestroy(params->format_options);
msFree(params);
}
/************************************************************************/
/* msWCSParseSubset20() */
/* */
/* Parses several string parameters and fills them into the */
/* subset object. */
/************************************************************************/
static int msWCSParseSubset20(wcs20SubsetObjPtr subset, const char *axis,
const char *crs, const char *min, const char *max)
{
int ts1, ts2;
ts1 = ts2 = MS_WCS20_UNDEFINED_VALUE;
if (subset == NULL) {
return MS_FAILURE;
}
if (axis == NULL || strlen(axis) == 0) {
msSetError(MS_WCSERR, "Subset axis is not given.",
"msWCSParseSubset20()");
return MS_FAILURE;
}
subset->axis = msStrdup(axis);
if (crs != NULL) {
subset->crs = msStrdup(crs);
}
/* Parse first (probably only) part of interval/point;
* check whether its a time value or a scalar value */
ts1 = msWCSParseTimeOrScalar20(&(subset->min), min);
if (ts1 == MS_WCS20_ERROR_VALUE) {
return MS_FAILURE;
}
/* check if its an interval */
/* if there is a comma, then it is */
if (max != NULL && strlen(max) > 0) {
subset->operation = MS_WCS20_TRIM;
/* Parse the second value of the interval */
ts2 = msWCSParseTimeOrScalar20(&(subset->max), max);
if (ts2 == MS_WCS20_ERROR_VALUE) {
return MS_FAILURE;
}
/* if at least one boundary is defined, use that value */
if ((ts1 == MS_WCS20_UNDEFINED_VALUE) ^ (ts2
== MS_WCS20_UNDEFINED_VALUE)) {
if (ts1 == MS_WCS20_UNDEFINED_VALUE) {
ts1 = ts2;
}
}
/* if time and scalar values do not fit, throw an error */
else if (ts1 != MS_WCS20_UNDEFINED_VALUE && ts2
!= MS_WCS20_UNDEFINED_VALUE && ts1 != ts2) {
msSetError(MS_WCSERR,
"Interval error: minimum is a %s value, maximum is a %s value",
"msWCSParseSubset20()", ts1 ? "time" : "scalar",
ts2 ? "time" : "scalar");
return MS_FAILURE;
}
/* if both min and max are unbounded -> throw an error */
if (subset->min.unbounded && subset->max.unbounded) {
msSetError(MS_WCSERR, "Invalid values: no bounds could be parsed",
"msWCSParseSubset20()");
return MS_FAILURE;
}
}
/* there is no second value, therefore it is a point.
* consequently set the operation to slice */
else {
subset->operation = MS_WCS20_SLICE;
if (ts1 == MS_WCS20_UNDEFINED_VALUE) {
msSetError(MS_WCSERR, "Invalid point value given",
"msWCSParseSubset20()");
return MS_FAILURE;
}
}
subset->timeOrScalar = ts1;
/* check whether the min is smaller than the max */
if (subset->operation == MS_WCS20_TRIM) {
if(subset->timeOrScalar == MS_WCS20_SCALAR_VALUE && subset->min.scalar == MS_WCS20_UNBOUNDED) {
subset->min.scalar = -MS_WCS20_UNBOUNDED;
}
if (subset->timeOrScalar == MS_WCS20_TIME_VALUE && subset->min.time
> subset->max.time) {
msSetError(MS_WCSERR,
"Minimum value of subset axis %s is larger than maximum value",
"msWCSParseSubset20()", subset->axis);
return MS_FAILURE;
}
if (subset->timeOrScalar == MS_WCS20_SCALAR_VALUE && subset->min.scalar > subset->max.scalar) {
msSetError(MS_WCSERR,
"Minimum value (%f) of subset axis '%s' is larger than maximum value (%f).",
"msWCSParseSubset20()", subset->min.scalar, subset->axis, subset->max.scalar);
return MS_FAILURE;
}
}
return MS_SUCCESS;
}
/************************************************************************/
/* msWCSParseSubsetKVPString20() */
/* */
/* Creates a new wcs20SubsetObj, parses a string and fills */
/* the parsed values into the object. Returns NULL on failure. */
/* Subset string: axis [ , crs ] ( intervalOrPoint ) */
/************************************************************************/
static int msWCSParseSubsetKVPString20(wcs20SubsetObjPtr subset, char *string)
{
char *axis, *crs, *min, *max;
axis = string;
crs = NULL;
min = NULL;
max = NULL;
/* find first '(' */
min = strchr(string, '(');
/* if min could not be found, the string is invalid */
if (min == NULL) {
msSetError(MS_WCSERR, "Invalid axis subset string: '%s'",
"msWCSParseSubsetKVPString20()", string);
return MS_FAILURE;
}
/* set min to first letter */
*min = '\0';
++min;
/* cut the trailing ')' */
if (min[strlen(min) - 1] == ')') {
min[strlen(min) - 1] = '\0';
}
/* look if also a max is defined */
max = strchr(min, ',');
if (max != NULL) {
*max = '\0';
++max;
}
/* look if also a crs is defined */
crs = strchr(axis, ',');
if (crs != NULL) {
*crs = '\0';
++crs;
}
return msWCSParseSubset20(subset, axis, crs, min, max);
}
/************************************************************************/
/* msWCSParseSizeString20() */
/* */
/* Parses a string containing the axis and the size as an integer. */
/* Size string: axis ( size ) */
/************************************************************************/
static int msWCSParseSizeString20(char *string, char *outAxis, size_t axisStringLen, int *outSize)
{
char *number = NULL;
char *check = NULL;
/* find first '(', the character before the number */
number = strchr(string, '(');
if(NULL == number) {
msSetError(MS_WCSERR, "Invalid size parameter value.",
"msWCSParseSize20()");
return MS_FAILURE;
}
/* cut trailing ')' */
check = strchr(string, ')');
if(NULL == check) {
msSetError(MS_WCSERR, "Invalid size parameter value.",
"msWCSParseSize20()");
return MS_FAILURE;
}
*number = '\0';
++number;
*check = '\0';
strlcpy(outAxis, string, axisStringLen);
/* parse size value */
if(msStringParseInteger(number, outSize) != MS_SUCCESS) {
msSetError(MS_WCSERR, "Parameter value '%s' is not a valid integer.",
"msWCSParseSize20()", number);
return MS_FAILURE;
}
return MS_SUCCESS;
}
/************************************************************************/
/* msWCSParseResolutionString20() */
/* */
/* Parses a resolution string and returns the axis, the units of */
/* measure and the resolution value. */
/* Subset string: axis ( value ) */
/************************************************************************/
static int msWCSParseResolutionString20(char *string,
char *outAxis, size_t axisStringLen, double *outResolution)
{
char *number = NULL;
char *check = NULL;
/* find brackets */
number = strchr(string, '(');
if(NULL == number) {
msSetError(MS_WCSERR, "Invalid resolution parameter value : %s.",
"msWCSParseSize20()", string);
return MS_FAILURE;
}
/* cut trailing ')' */
check = strchr(string, ')');
if(NULL == check) {
msSetError(MS_WCSERR, "Invalid size parameter value.",
"msWCSParseSize20()");
return MS_FAILURE;
}
*number = '\0';
++number;
*check = '\0';
strlcpy(outAxis, string, axisStringLen);
if(msStringParseDouble(number, outResolution) != MS_SUCCESS) {
*outResolution = MS_WCS20_UNBOUNDED;
msSetError(MS_WCSERR, "Invalid resolution parameter value : %s.",
"msWCSParseSize20()", number);
return MS_FAILURE;
}
return MS_SUCCESS;
}
/************************************************************************/
/* msWCSParseScaleString20() */
/* */
/* Parses a scale string and returns the axis, the and the value. */
/* Subset string: axis ( value ) */
/************************************************************************/
static int msWCSParseScaleString20(char *string,
char *outAxis, size_t axisStringLen, double *outScale)
{
char *number = NULL;
char *check = NULL;
/* find brackets */
number = strchr(string, '(');
if(NULL == number) {
msSetError(MS_WCSERR, "Invalid resolution parameter value : %s.",
"msWCSParseScaleString20()", string);
return MS_FAILURE;
}
/* cut trailing ')' */
check = strchr(string, ')');
if(NULL == check || check < number) {
msSetError(MS_WCSERR, "Invalid scale parameter value.",
"msWCSParseScaleString20()");
return MS_FAILURE;
}
*number = '\0';
++number;
*check = '\0';
strlcpy(outAxis, string, axisStringLen);
if(msStringParseDouble(number, outScale) != MS_SUCCESS || *outScale <= 0.0) {
*outScale = MS_WCS20_UNBOUNDED;
msSetError(MS_WCSERR, "Invalid scale parameter value : %s.",
"msWCSParseScaleString20()", number);
return MS_FAILURE;
}
return MS_SUCCESS;
}
/************************************************************************/
/* msWCSParseResolutionString20() */
/* */
/* Parses a resolution string and returns the axis, the units of */
/* measure and the resolution value. */
/* Subset string: axis ( value ) */
/************************************************************************/
static int msWCSParseScaleExtentString20(char *string, char *outAxis,
size_t axisStringLen,
int *outMin, int *outMax)
{
char *number = NULL;
char *check = NULL;
char *colon = NULL;
/* find brackets */
number = strchr(string, '(');
if(NULL == number) {
msSetError(MS_WCSERR, "Invalid extent parameter value : %s.",
"msWCSParseScaleExtentString20()", string);
return MS_FAILURE;
}
/* find colon */
colon = strchr(string, ':');
if(NULL == colon || colon < number) {
msSetError(MS_WCSERR, "Invalid extent parameter value : %s.",
"msWCSParseScaleExtentString20()", string);
return MS_FAILURE;
}
/* cut trailing ')' */
check = strchr(string, ')');
if(NULL == check || check < colon) {
msSetError(MS_WCSERR, "Invalid extent parameter value.",
"msWCSParseScaleExtentString20()");
return MS_FAILURE;
}
*number = '\0';
++number;
*colon = '\0';
++colon;
*check = '\0';
strlcpy(outAxis, string, axisStringLen);
if(msStringParseInteger(number, outMin) != MS_SUCCESS) {
*outMin = 0;
msSetError(MS_WCSERR, "Invalid min parameter value : %s.",
"msWCSParseScaleExtentString20()", number);
return MS_FAILURE;
}
else if(msStringParseInteger(colon, outMax) != MS_SUCCESS) {
*outMax = 0;
msSetError(MS_WCSERR, "Invalid resolution parameter value : %s.",
"msWCSParseScaleExtentString20()", colon);
return MS_FAILURE;
}
if (*outMin > *outMax) {
msSetError(MS_WCSERR, "Invalid extent: lower part is higher than upper part.",
"msWCSParseScaleExtentString20()");
return MS_FAILURE;
}
return MS_SUCCESS;
}
#if defined(USE_LIBXML2)
/*
Utility function to get the first child of a node with a given node name
*/
xmlNodePtr msLibXml2GetFirstChild(xmlNodePtr parent, const char *name) {
xmlNodePtr node;
if (!parent || !name) {
return NULL;
}
XML_FOREACH_CHILD(parent, node) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(node);
if (EQUAL((char *)node->name, name)) {
return node;
}
}
return NULL;
}
/*
Utility function to get the first child of a node with a given node name and
namespace.
*/
xmlNodePtr msLibXml2GetFirstChildNs(xmlNodePtr parent, const char *name, xmlNsPtr ns) {
xmlNodePtr node;
if (!parent || !name || !ns) {
return NULL;
}
XML_FOREACH_CHILD(parent, node) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(node);
if (EQUAL((char *)node->name, name) && ns == node->ns) {
return node;
}
}
return NULL;
}
#endif /* defined(USE_LIBXML2) */
/************************************************************************/
/* msWCSParseRequest20_XMLGetCapabilities() */
/* */
/* Parses a DOM element, representing a GetCapabilities-request */
/* to a params object. */
/************************************************************************/
#if defined(USE_LIBXML2)
static int msWCSParseRequest20_XMLGetCapabilities(
xmlNodePtr root, wcs20ParamsObjPtr params)
{
xmlNodePtr child;
char *content = NULL;
XML_FOREACH_CHILD(root, child) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(child)
else if (EQUAL((char *)child->name, "AcceptVersions")) {
xmlNodePtr versionNode = NULL;
XML_FOREACH_CHILD(child, versionNode) {
/* for(child = firstChild->children; child != NULL; child = child->next) */
XML_LOOP_IGNORE_COMMENT_OR_TEXT(versionNode);
XML_ASSERT_NODE_NAME(versionNode, "Version");
content = (char *)xmlNodeGetContent(versionNode);
params->accept_versions = CSLAddString(params->accept_versions, content);
xmlFree(content);
}
} else if(EQUAL((char *)child->name, "Sections")) {
xmlNodePtr sectionNode = NULL;
XML_FOREACH_CHILD(child, sectionNode) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(sectionNode)
XML_ASSERT_NODE_NAME(sectionNode, "Section");
content = (char *)xmlNodeGetContent(sectionNode);
params->sections = CSLAddString(params->sections, content);
xmlFree(content);
}
} else if(EQUAL((char *)child->name, "UpdateSequence")) {
params->updatesequence =
(char *)xmlNodeGetContent(child);
} else if(EQUAL((char *)child->name, "AcceptFormats")) {
/* Maybe not necessary, since only format is xml. */
/* At least ignore it, to not generate an error. */
} else if(EQUAL((char *)child->name, "AcceptLanguages")) {
/* ignore */
} else {
XML_UNKNOWN_NODE_ERROR(child);
}
}
return MS_SUCCESS;
}
#endif
/************************************************************************/
/* msWCSParseRequest20_XMLDescribeCoverage() */
/* */
/* Parses a DOM element, representing a DescribeCoverage-request */
/* to a params object. */
/************************************************************************/
#if defined(USE_LIBXML2)
static int msWCSParseRequest20_XMLDescribeCoverage(
xmlNodePtr root, wcs20ParamsObjPtr params)
{
xmlNodePtr child;
int numIds = 0;
char *id;
XML_FOREACH_CHILD(root, child) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(child)
XML_ASSERT_NODE_NAME(child, "CoverageID");
/* Node content is the coverage ID */
id = (char *)xmlNodeGetContent(child);
if (id == NULL || strlen(id) == 0) {
msSetError(MS_WCSERR, "CoverageID could not be parsed.",
"msWCSParseRequest20_XMLDescribeCoverage()");
return MS_FAILURE;
}
/* insert coverage ID into the list */
++numIds;
params->ids = CSLAddString(params->ids, (char *)id);
xmlFree(id);
}
return MS_SUCCESS;
}
#endif
/************************************************************************/
/* msWCSParseRequest20_XMLGetCoverage() */
/* */
/* Parses a DOM element, representing a GetCoverage-request to a */
/* params object. */
/************************************************************************/
#if defined(USE_LIBXML2)
static int msWCSParseRequest20_XMLGetCoverage(
mapObj* map, xmlNodePtr root, wcs20ParamsObjPtr params)
{
xmlNodePtr child;
int numIds = 0;
char *id;
XML_FOREACH_CHILD(root, child) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(child)
else if (EQUAL((char *)child->name, "CoverageID")) {
/* Node content is the coverage ID */
id = (char *)xmlNodeGetContent(child);
if (id == NULL || strlen(id) == 0) {
msSetError(MS_WCSERR, "CoverageID could not be parsed.",
"msWCSParseRequest20_XMLGetCoverage()");
return MS_FAILURE;
}
/* insert coverage ID into the list */
++numIds;
params->ids = CSLAddString(params->ids, (char *)id);
xmlFree(id);
} else if (EQUAL((char *) child->name, "Format")) {
msFree(params->format);
params->format = (char *)xmlNodeGetContent(child);
} else if (EQUAL((char *) child->name, "Mediatype")) {
char *content = (char *)xmlNodeGetContent(child);
if(content != NULL && (EQUAL(content, "multipart/mixed")
|| EQUAL(content, "multipart/related"))) {
params->multipart = MS_TRUE;
}
else {
msSetError(MS_WCSERR, "Invalid value '%s' for parameter 'Mediatype'.",
"msWCSParseRequest20()", content);
xmlFree(content);
return MS_FAILURE;
}
xmlFree(content);
} else if (EQUAL((char *) child->name, "DimensionTrim")) {
wcs20AxisObjPtr axis = NULL;
wcs20SubsetObjPtr subset = NULL;
xmlNodePtr node = NULL;
char *axisName = NULL, *min = NULL, *max = NULL, *crs = NULL;
/* get strings for axis, min and max */
XML_FOREACH_CHILD(child, node) {
XML_LOOP_IGNORE_COMMENT_OR_TEXT(node)
else if (EQUAL((char *)node->name, "Dimension")) {
if (axisName != NULL) {
msSetError(MS_WCSERR,
"Parameter 'Dimension' is already set.",
"msWCSParseRequest20_XMLGetCoverage()");
return MS_FAILURE;
}
axisName = (char *) xmlNodeGetContent(node);
crs = (char *) xmlGetProp(node, BAD_CAST "crs");
} else if (EQUAL((char *)node->name, "trimLow")) {
min = (char *) xmlNodeGetContent(node);
} else if (EQUAL((char *)node->name, "trimHigh")) {
max = (char *) xmlNodeGetContent(node);
} else {
msFree(axisName);
msFree(min);
msFree(max);
msFree(crs);
XML_UNKNOWN_NODE_ERROR(node);
}
}
if(NULL == (subset = msWCSCreateSubsetObj20())) {
msFree(axisName);
msFree(min);
msFree(max);
msFree(crs);
return MS_FAILURE;
}
/* min and max have to have a value */
if(min == NULL ) {
min = msStrdup("*");
}
if(max == NULL) {
max = msStrdup("*");
}
if (msWCSParseSubset20(subset, axisName, crs, min, max)
== MS_FAILURE) {
msWCSFreeSubsetObj20(subset);
msWCSException(map, "InvalidSubsetting", "subset", "2.0.1");
return MS_DONE;
}
if(NULL == (axis = msWCSFindAxis20(params, subset->axis))) {
if(NULL == (axis = msWCSCreateAxisObj20())) {
msFree(axisName);
msFree(min);
msFree(max);
msFree(crs);
return MS_FAILURE;
}
axis->name = msStrdup(subset->axis);
msWCSInsertAxisObj20(params, axis);
}
axis->subset = subset;
/* cleanup */
msFree(axisName);
msFree(min);
msFree(max);
msFree(crs);
} else if(EQUAL((char *) child->name, "DimensionSlice")) {
msSetError(MS_WCSERR, "Operation '%s' is not supported by MapServer.",
"msWCSParseRequest20_XMLGetCoverage()", (char *)child->name);
return MS_FAILURE;
} else if(EQUAL((char *) child->name, "Size")) {
wcs20AxisObjPtr axis;
char *axisName;
char *content;
if(NULL == (axisName = (char *) xmlGetProp(child, BAD_CAST "dimension")) ) {
msSetError(MS_WCSERR, "Attribute 'dimension' is missing in element 'Size'.",
"msWCSParseRequest20_XMLGetCoverage()");
return MS_FAILURE;
}
if(NULL == (axis = msWCSFindAxis20(params, axisName))) {
if(NULL == (axis = msWCSCreateAxisObj20())) {
xmlFree(axisName);
return MS_FAILURE;
}
axis->name = msStrdup(axisName);
msWCSInsertAxisObj20(params, axis);
}
xmlFree(axisName);
content = (char *)xmlNodeGetContent(child);
if(msStringParseInteger(content, &(axis->size)) != MS_SUCCESS) {
xmlFree(content);
msSetError(MS_WCSERR, "Value of element 'Size' could not "
"be parsed to a valid integer.",
"msWCSParseRequest20_XMLGetCoverage()");
return MS_FAILURE;
}
xmlFree(content);
} else if(EQUAL((char *) child->name, "Resolution")) {
wcs20AxisObjPtr axis;
char *axisName;
char *content;
if(NULL == (axisName = (char *) xmlGetProp(child, BAD_CAST "dimension"))) {
msSetError(MS_WCSERR, "Attribute 'dimension' is missing "
"in element 'Resolution'.",
"msWCSParseRequest20_XMLGetCoverage()");
return MS_FAILURE;
}
if(NULL == (axis = msWCSFindAxis20(params, axisName))) {
if(NULL == (axis = msWCSCreateAxisObj20())) {
xmlFree(axisName);
return MS_FAILURE;
}
axis->name = msStrdup(axisName);
msWCSInsertAxisObj20(params, axis);
}