CPLErr GDALWMSMiniDriver_WMS::Initialize(CPLXMLNode *config) {
CPLErr ret = CE_None;
if (ret == CE_None) {
const char *version = CPLGetXMLValue(config, "Version", "1.1.0");
if (version[0] != '\0') {
m_version = version;
m_iversion = VersionStringToInt(version);
if (m_iversion == -1) {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: Invalid version.");
ret = CE_Failure;
}
} else {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: Version missing.");
ret = CE_Failure;
}
}
if (ret == CE_None) {
const char *base_url = CPLGetXMLValue(config, "ServerURL", "");
if (base_url[0] != '\0') {
/* Try the old name */
base_url = CPLGetXMLValue(config, "ServerUrl", "");
}
if (base_url[0] != '\0') {
m_base_url = base_url;
} else {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: ServerURL missing.");
ret = CE_Failure;
}
}
if (ret == CE_None) {
/* SRS is WMS version 1.1 and earlier, if SRS is not set use default unless CRS is set
CRS is WMS version 1.3, if CRS is not set use default unless SRS is set */
const char *crs = CPLGetXMLValue(config, "CRS", "");
const char *srs = CPLGetXMLValue(config, "SRS", "");
if (m_iversion >= VersionStringToInt("1.3")) {
/* Version 1.3 and above */
if ((srs[0] != '\0') && (crs[0] == '\0')) {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: WMS version 1.3 and above expects CRS however SRS was set instead.");
ret = CE_Failure;
} else if (crs[0] != '\0') {
m_crs = crs;
} else {
m_crs = "EPSG:4326";
}
} else {
/* Version 1.1.1 and below */
if ((srs[0] == '\0') && (crs[0] != '\0')) {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: WMS version 1.1.1 and below expects SRS however CRS was set instead.");
ret = CE_Failure;
} else if (srs[0] != '\0') {
m_srs = srs;
} else {
m_srs = "EPSG:4326";
}
}
}
if (ret == CE_None) {
if (m_srs.size()) {
m_projection_wkt = ProjToWKT(m_srs);
} else if (m_crs.size()) {
m_projection_wkt = ProjToWKT(m_crs);
}
}
if (ret == CE_None) {
m_image_format = CPLGetXMLValue(config, "ImageFormat", "image/jpeg");
m_layers = CPLGetXMLValue(config, "Layers", "");
m_styles = CPLGetXMLValue(config, "Styles", "");
m_transparent = CPLGetXMLValue(config, "Transparent","");
// the transparent flag needs to be "TRUE" or "FALSE" in upper case according to the WMS spec so force upper case
int i=0;
while (m_transparent[i] != '\0')
{
m_transparent[i] = toupper(m_transparent[i]);
i ++;
}
}
if (ret == CE_None) {
const char *bbox_order = CPLGetXMLValue(config, "BBoxOrder", "xyXY");
if (bbox_order[0] != '\0') {
int i;
for (i = 0; i < 4; ++i) {
if ((bbox_order[i] != 'x') && (bbox_order[i] != 'y') && (bbox_order[i] != 'X') && (bbox_order[i] != 'Y')) break;
}
if (i == 4) {
m_bbox_order = bbox_order;
} else {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: Incorrect BBoxOrder.");
ret = CE_Failure;
}
} else {
CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, WMS mini-driver: BBoxOrder missing.");
ret = CE_Failure;
}
}
return ret;
}
static
CPLXMLNode * GDALWMSDatasetGetConfigFromURL(GDALOpenInfo *poOpenInfo)
{
const char* pszBaseURL = poOpenInfo->pszFilename;
if (EQUALN(pszBaseURL, "WMS:", 4))
pszBaseURL += 4;
CPLString osLayer = CPLURLGetValue(pszBaseURL, "LAYERS");
CPLString osVersion = CPLURLGetValue(pszBaseURL, "VERSION");
CPLString osSRS = CPLURLGetValue(pszBaseURL, "SRS");
CPLString osCRS = CPLURLGetValue(pszBaseURL, "CRS");
CPLString osBBOX = CPLURLGetValue(pszBaseURL, "BBOX");
CPLString osFormat = CPLURLGetValue(pszBaseURL, "FORMAT");
CPLString osTransparent = CPLURLGetValue(pszBaseURL, "TRANSPARENT");
/* GDAL specific extensions to alter the default settings */
CPLString osOverviewCount = CPLURLGetValue(pszBaseURL, "OVERVIEWCOUNT");
CPLString osTileSize = CPLURLGetValue(pszBaseURL, "TILESIZE");
CPLString osMinResolution = CPLURLGetValue(pszBaseURL, "MINRESOLUTION");
CPLString osBBOXOrder = CPLURLGetValue(pszBaseURL, "BBOXORDER");
CPLString osBaseURL = pszBaseURL;
/* Remove all keywords to get base URL */
osBaseURL = CPLURLAddKVP(osBaseURL, "VERSION", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "REQUEST", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "LAYERS", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "SRS", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "CRS", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "BBOX", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "FORMAT", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "TRANSPARENT", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "STYLES", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "WIDTH", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "HEIGHT", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "OVERVIEWCOUNT", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "TILESIZE", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "MINRESOLUTION", NULL);
osBaseURL = CPLURLAddKVP(osBaseURL, "BBOXORDER", NULL);
if (osBaseURL.size() > 0 && osBaseURL[osBaseURL.size() - 1] == '&')
osBaseURL.resize(osBaseURL.size() - 1);
if (osVersion.size() == 0)
osVersion = "1.1.1";
CPLString osSRSTag;
CPLString osSRSValue;
if(VersionStringToInt(osVersion.c_str())>= VersionStringToInt("1.3.0"))
{
if (osSRS.size())
{
CPLError(CE_Warning, CPLE_AppDefined,
"WMS version 1.3 and above expects CRS however SRS was set instead.");
}
osSRSValue = osCRS;
osSRSTag = "CRS";
}
else
{
if (osCRS.size())
{
CPLError(CE_Warning, CPLE_AppDefined,
"WMS version 1.1.1 and below expects SRS however CRS was set instead.");
}
osSRSValue = osSRS;
osSRSTag = "SRS";
}
if (osSRSValue.size() == 0)
osSRSValue = "EPSG:4326";
if (osBBOX.size() == 0)
{
if (osBBOXOrder.compare("yxYX") == 0)
osBBOX = "-90,-180,90,180";
else
osBBOX = "-180,-90,180,90";
}
char** papszTokens = CSLTokenizeStringComplex(osBBOX, ",", 0, 0);
if (CSLCount(papszTokens) != 4)
{
CSLDestroy(papszTokens);
return NULL;
}
const char* pszMinX = papszTokens[0];
const char* pszMinY = papszTokens[1];
const char* pszMaxX = papszTokens[2];
const char* pszMaxY = papszTokens[3];
if (osBBOXOrder.compare("yxYX") == 0)
{
std::swap(pszMinX, pszMinY);
std::swap(pszMaxX, pszMaxY);
}
double dfMinX = CPLAtofM(pszMinX);
double dfMinY = CPLAtofM(pszMinY);
double dfMaxX = CPLAtofM(pszMaxX);
double dfMaxY = CPLAtofM(pszMaxY);
if (dfMaxY <= dfMinY || dfMaxX <= dfMinX)
{
CSLDestroy(papszTokens);
return NULL;
}
int nTileSize = atoi(osTileSize);
if (nTileSize <= 128 || nTileSize > 2048)
nTileSize = 1024;
int nXSize, nYSize;
int nOverviewCount = (osOverviewCount.size()) ? atoi(osOverviewCount) : 20;
if (osMinResolution.size() != 0)
{
double dfMinResolution = CPLAtofM(osMinResolution);
while (nOverviewCount > 20)
{
nOverviewCount --;
dfMinResolution *= 2;
}
nXSize = (int) ((dfMaxX - dfMinX) / dfMinResolution + 0.5);
nYSize = (int) ((dfMaxY - dfMinY) / dfMinResolution + 0.5);
}
else
{
double dfRatio = (dfMaxX - dfMinX) / (dfMaxY - dfMinY);
if (dfRatio > 1)
{
nXSize = nTileSize;
nYSize = (int) (nXSize / dfRatio);
}
else
{
nYSize = nTileSize;
nXSize = (int) (nYSize * dfRatio);
}
if (nOverviewCount < 0 || nOverviewCount > 20)
nOverviewCount = 20;
nXSize = nXSize * (1 << nOverviewCount);
nYSize = nYSize * (1 << nOverviewCount);
}
int bTransparent = osTransparent.size() ? CSLTestBoolean(osTransparent) : FALSE;
if (osFormat.size() == 0)
{
if (!bTransparent)
{
osFormat = "image/jpeg";
}
else
{
osFormat = "image/png";
}
}
char* pszEscapedURL = CPLEscapeString(osBaseURL.c_str(), -1, CPLES_XML);
char* pszEscapedLayerURL = CPLEscapeString(osLayer.c_str(), -1, CPLES_URL);
char* pszEscapedLayerXML = CPLEscapeString(pszEscapedLayerURL, -1, CPLES_XML);
CPLString osXML = CPLSPrintf(
"<GDAL_WMS>\n"
" <Service name=\"WMS\">\n"
" <Version>%s</Version>\n"
" <ServerUrl>%s</ServerUrl>\n"
" <Layers>%s</Layers>\n"
" <%s>%s</%s>\n"
" <ImageFormat>%s</ImageFormat>\n"
" <Transparent>%s</Transparent>\n"
" <BBoxOrder>%s</BBoxOrder>\n"
" </Service>\n"
" <DataWindow>\n"
" <UpperLeftX>%s</UpperLeftX>\n"
" <UpperLeftY>%s</UpperLeftY>\n"
" <LowerRightX>%s</LowerRightX>\n"
" <LowerRightY>%s</LowerRightY>\n"
" <SizeX>%d</SizeX>\n"
" <SizeY>%d</SizeY>\n"
" </DataWindow>\n"
" <BandsCount>%d</BandsCount>\n"
" <BlockSizeX>%d</BlockSizeX>\n"
" <BlockSizeY>%d</BlockSizeY>\n"
" <OverviewCount>%d</OverviewCount>\n"
"</GDAL_WMS>\n",
osVersion.c_str(),
pszEscapedURL,
pszEscapedLayerXML,
osSRSTag.c_str(),
osSRSValue.c_str(),
osSRSTag.c_str(),
osFormat.c_str(),
(bTransparent) ? "TRUE" : "FALSE",
(osBBOXOrder.size()) ? osBBOXOrder.c_str() : "xyXY",
pszMinX, pszMaxY, pszMaxX, pszMinY,
nXSize, nYSize,
(bTransparent) ? 4 : 3,
nTileSize, nTileSize,
nOverviewCount);
CPLFree(pszEscapedURL);
CPLFree(pszEscapedLayerURL);
CPLFree(pszEscapedLayerXML);
CSLDestroy(papszTokens);
CPLDebug("WMS", "Opening WMS :\n%s", osXML.c_str());
return CPLParseXMLString(osXML);
}
