/
gdalogcapidataset.cpp
2639 lines (2375 loc) · 102 KB
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gdalogcapidataset.cpp
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/******************************************************************************
*
* Project: GDAL
* Purpose: OGC API interface
* Author: Even Rouault, <even.rouault at spatialys.com>
*
******************************************************************************
* Copyright (c) 2020, Even Rouault, <even.rouault at spatialys.com>
*
* 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 or substantial portions of the 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 "cpl_error.h"
#include "cpl_json.h"
#include "cpl_http.h"
#include "gdal_priv.h"
#include "tilematrixset.hpp"
#include "gdal_utils.h"
#include "ogrsf_frmts.h"
#ifdef OGR_ENABLE_DRIVER_GML
#include "parsexsd.h"
#endif
#include <algorithm>
#include <memory>
#include <vector>
// g++ -Wall -Wextra -std=c++11 -Wall -g -fPIC frmts/ogcapi/gdalogcapidataset.cpp -shared -o gdal_OGCAPI.so -Iport -Igcore -Iogr -Iogr/ogrsf_frmts -Iogr/ogrsf_frmts/gml -Iapps -L. -lgdal
extern "C" void GDALRegister_OGCAPI();
#define MEDIA_TYPE_OAPI_3_0 "application/vnd.oai.openapi+json;version=3.0"
#define MEDIA_TYPE_OAPI_3_0_ALT "application/openapi+json;version=3.0"
#define MEDIA_TYPE_JSON "application/json"
#define MEDIA_TYPE_GEOJSON "application/geo+json"
#define MEDIA_TYPE_TEXT_XML "text/xml"
#define MEDIA_TYPE_APPLICATION_XML "application/xml"
#define MEDIA_TYPE_JSON_SCHEMA "application/schema+json"
/************************************************************************/
/* ==================================================================== */
/* OGCAPIDataset */
/* ==================================================================== */
/************************************************************************/
class OGCAPIDataset final: public GDALDataset
{
friend class OGCAPIMapWrapperBand;
friend class OGCAPITilesWrapperBand;
friend class OGCAPITiledLayer;
bool m_bMustCleanPersistent = false;
CPLString m_osRootURL{};
CPLString m_osUserPwd{};
CPLString m_osUserQueryParams{};
double m_adfGeoTransform[6];
OGRSpatialReference m_oSRS{};
// Classic OGC API features /items access
std::unique_ptr<GDALDataset> m_poOAPIFDS{};
// Map API
std::unique_ptr<GDALDataset> m_poWMSDS{};
// Tiles API
std::vector<std::unique_ptr<GDALDataset>> m_apoDatasetsElementary{};
std::vector<std::unique_ptr<GDALDataset>> m_apoDatasetsAssembled{};
std::vector<std::unique_ptr<GDALDataset>> m_apoDatasetsCropped{};
std::vector<std::unique_ptr<OGRLayer>> m_apoLayers{};
CPLString BuildURL(const std::string& href) const;
void SetRootURLFromURL(const std::string& osURL);
bool InitFromFile(GDALOpenInfo* poOpenInfo);
bool InitFromURL(GDALOpenInfo* poOpenInfo);
bool InitFromCollection(GDALOpenInfo* poOpenInfo,
CPLJSONDocument& oDoc);
bool Download(
const CPLString& osURL,
const char* pszPostContent,
const char* pszAccept,
CPLString& osResult,
CPLString& osContentType,
bool bEmptyContentOK,
CPLStringList* paosHeaders );
bool DownloadJSon(
const CPLString& osURL,
CPLJSONDocument& oDoc,
const char* pszPostContent = nullptr,
const char* pszAccept = MEDIA_TYPE_GEOJSON ", " MEDIA_TYPE_JSON,
CPLStringList* paosHeaders = nullptr);
bool InitWithMapAPI(GDALOpenInfo* poOpenInfo,
const CPLString& osMapURL,
double dfXMin, double dfYMin,
double dfXMax, double dfYMax);
bool InitWithTilesAPI(GDALOpenInfo* poOpenInfo,
const CPLString& osTilesURL,
double dfXMin, double dfYMin,
double dfXMax, double dfYMax,
const CPLJSONObject& oJsonCollection);
bool InitWithCoverageAPI(GDALOpenInfo* poOpenInfo,
const CPLString& osTilesURL,
double dfXMin, double dfYMin,
double dfXMax, double dfYMax,
const CPLJSONObject& oJsonCollection);
protected:
CPLErr IRasterIO( GDALRWFlag eRWFlag,
int nXOff, int nYOff, int nXSize, int nYSize,
void * pData, int nBufXSize, int nBufYSize,
GDALDataType eBufType,
int nBandCount, int *panBandMap,
GSpacing nPixelSpace, GSpacing nLineSpace,
GSpacing nBandSpace,
GDALRasterIOExtraArg* psExtraArg) override;
int CloseDependentDatasets() override;
public:
OGCAPIDataset();
~OGCAPIDataset();
CPLErr GetGeoTransform(double* padfGeoTransform) override;
const OGRSpatialReference* GetSpatialRef() const override;
int GetLayerCount() override {
return m_poOAPIFDS ? m_poOAPIFDS->GetLayerCount() : static_cast<int>(m_apoLayers.size()); }
OGRLayer* GetLayer(int idx) override {
return m_poOAPIFDS ? m_poOAPIFDS->GetLayer(idx) :
idx >= 0 && idx < GetLayerCount() ? m_apoLayers[idx].get() : nullptr; }
static int Identify(GDALOpenInfo* poOpenInfo);
static GDALDataset* Open(GDALOpenInfo* poOpenInfo);
};
/************************************************************************/
/* ==================================================================== */
/* OGCAPIMapWrapperBand */
/* ==================================================================== */
/************************************************************************/
class OGCAPIMapWrapperBand final: public GDALRasterBand
{
public:
OGCAPIMapWrapperBand(OGCAPIDataset* poDS, int nBand);
virtual GDALRasterBand* GetOverview(int nLevel) override;
virtual int GetOverviewCount() override;
virtual GDALColorInterp GetColorInterpretation() override;
protected:
virtual CPLErr IReadBlock( int nBlockXOff, int nBlockYOff, void * pImage) override;
virtual CPLErr IRasterIO( GDALRWFlag, int, int, int, int,
void *, int, int, GDALDataType,
GSpacing, GSpacing,
GDALRasterIOExtraArg* psExtraArg ) override;
};
/************************************************************************/
/* ==================================================================== */
/* OGCAPITilesWrapperBand */
/* ==================================================================== */
/************************************************************************/
class OGCAPITilesWrapperBand final: public GDALRasterBand
{
public:
OGCAPITilesWrapperBand(OGCAPIDataset* poDS, int nBand);
virtual GDALRasterBand* GetOverview(int nLevel) override;
virtual int GetOverviewCount() override;
virtual GDALColorInterp GetColorInterpretation() override;
protected:
virtual CPLErr IReadBlock( int nBlockXOff, int nBlockYOff, void * pImage) override;
virtual CPLErr IRasterIO( GDALRWFlag, int, int, int, int,
void *, int, int, GDALDataType,
GSpacing, GSpacing,
GDALRasterIOExtraArg* psExtraArg ) override;
};
/************************************************************************/
/* ==================================================================== */
/* OGCAPITiledLayer */
/* ==================================================================== */
/************************************************************************/
class OGCAPITiledLayer;
class OGCAPITiledLayerFeatureDefn final: public OGRFeatureDefn
{
OGCAPITiledLayer* m_poLayer = nullptr;
public:
OGCAPITiledLayerFeatureDefn(OGCAPITiledLayer* poLayer, const char* pszName):
OGRFeatureDefn(pszName), m_poLayer(poLayer) {}
int GetFieldCount() const override;
void InvalidateLayer() { m_poLayer = nullptr; }
};
class OGCAPITiledLayer final: public OGRLayer,
public OGRGetNextFeatureThroughRaw<OGCAPITiledLayer>
{
OGCAPIDataset* m_poDS = nullptr;
bool m_bFeatureDefnEstablished = false;
OGCAPITiledLayerFeatureDefn* m_poFeatureDefn = nullptr;
OGREnvelope m_sEnvelope{};
CPLString m_osTileData{};
std::unique_ptr<GDALDataset> m_poUnderlyingDS{};
OGRLayer* m_poUnderlyingLayer = nullptr;
int m_nCurY = 0;
int m_nCurX = 0;
CPLString m_osTileURL{};
bool m_bIsMVT = false;
const gdal::TileMatrixSet::TileMatrix m_oTileMatrix{};
bool m_bInvertAxis = false;
// absolute bounds
int m_nMinX = 0;
int m_nMaxX = 0;
int m_nMinY = 0;
int m_nMaxY = 0;
// depends on spatial filter
int m_nCurMinX = 0;
int m_nCurMaxX = 0;
int m_nCurMinY = 0;
int m_nCurMaxY = 0;
int GetCoalesceFactorForRow(int nRow) const;
bool IncrementTileIndices();
OGRFeature* GetNextRawFeature();
GDALDataset* OpenTile(int nX, int nY, bool& bEmptyContent);
void FinalizeFeatureDefnWithLayer(OGRLayer* poUnderlyingLayer);
OGRFeature* BuildFeature(OGRFeature* poSrcFeature, int nX, int nY);
protected:
friend class OGCAPITiledLayerFeatureDefn;
void EstablishFields();
public:
OGCAPITiledLayer(OGCAPIDataset* poDS,
bool bInvertAxis,
const CPLString& osTileURL,
bool bIsMVT,
const gdal::TileMatrixSet::TileMatrix& tileMatrix,
OGRwkbGeometryType eGeomType);
~OGCAPITiledLayer();
void SetExtent(double dfXMin, double dfYMin, double dfXMax, double dfYMax);
void SetFields(const std::vector<std::unique_ptr<OGRFieldDefn>>& apoFields);
void SetMinMaxXY(int minCol, int minRow, int maxCol, int maxRow);
void ResetReading() override;
OGRFeatureDefn* GetLayerDefn() override { return m_poFeatureDefn; }
const char* GetName() override { return m_poFeatureDefn->GetName(); }
OGRwkbGeometryType GetGeomType() override { return m_poFeatureDefn->GetGeomType(); }
DEFINE_GET_NEXT_FEATURE_THROUGH_RAW(OGCAPITiledLayer)
GIntBig GetFeatureCount( int /* bForce */ ) override { return -1; }
OGRErr GetExtent( OGREnvelope *psExtent, int bForce ) override;
OGRErr GetExtent( int iGeomField, OGREnvelope *psExtent, int bForce ) override
{ return OGRLayer::GetExtent(iGeomField, psExtent, bForce); }
void SetSpatialFilter( OGRGeometry * ) override;
void SetSpatialFilter( int iGeomField, OGRGeometry *poGeom ) override
{ OGRLayer::SetSpatialFilter(iGeomField, poGeom); }
OGRFeature *GetFeature(GIntBig nFID) override;
int TestCapability(const char*) override;
};
/************************************************************************/
/* GetFieldCount() */
/************************************************************************/
int OGCAPITiledLayerFeatureDefn::GetFieldCount() const
{
if( m_poLayer )
{
m_poLayer->EstablishFields();
}
return OGRFeatureDefn::GetFieldCount();
}
/************************************************************************/
/* OGCAPIDataset() */
/************************************************************************/
OGCAPIDataset::OGCAPIDataset()
{
m_adfGeoTransform[0] = 0;
m_adfGeoTransform[1] = 1;
m_adfGeoTransform[2] = 0;
m_adfGeoTransform[3] = 0;
m_adfGeoTransform[4] = 0;
m_adfGeoTransform[5] = 1;
}
/************************************************************************/
/* ~OGCAPIDataset() */
/************************************************************************/
OGCAPIDataset::~OGCAPIDataset()
{
if( m_bMustCleanPersistent )
{
char **papszOptions =
CSLSetNameValue(
nullptr, "CLOSE_PERSISTENT", CPLSPrintf("OGCAPI:%p", this));
CPLHTTPDestroyResult(CPLHTTPFetch(m_osRootURL, papszOptions));
CSLDestroy(papszOptions);
}
OGCAPIDataset::CloseDependentDatasets();
}
/************************************************************************/
/* CloseDependentDatasets() */
/************************************************************************/
int OGCAPIDataset::CloseDependentDatasets()
{
if( m_apoDatasetsElementary.empty() )
return false;
// in this order
m_apoDatasetsCropped.clear();
m_apoDatasetsAssembled.clear();
m_apoDatasetsElementary.clear();
return true;
}
/************************************************************************/
/* GetGeoTransform() */
/************************************************************************/
CPLErr OGCAPIDataset::GetGeoTransform(double* padfGeoTransform)
{
memcpy(padfGeoTransform, m_adfGeoTransform, 6 * sizeof(double));
return CE_None;
}
/************************************************************************/
/* GetSpatialRef() */
/************************************************************************/
const OGRSpatialReference* OGCAPIDataset::GetSpatialRef() const
{
return !m_oSRS.IsEmpty() ? &m_oSRS : nullptr;
}
/************************************************************************/
/* CheckContentType() */
/************************************************************************/
// We may ask for "application/openapi+json;version=3.0"
// and the server returns "application/openapi+json; charset=utf-8; version=3.0"
static bool CheckContentType(const char* pszGotContentType,
const char* pszExpectedContentType)
{
CPLStringList aosGotTokens(CSLTokenizeString2(pszGotContentType, "; ", 0));
CPLStringList aosExpectedTokens(CSLTokenizeString2(pszExpectedContentType, "; ", 0));
for( int i = 0; i < aosExpectedTokens.size(); i++ )
{
bool bFound = false;
for( int j = 0; j < aosGotTokens.size(); j++ )
{
if( EQUAL(aosExpectedTokens[i], aosGotTokens[j]) )
{
bFound = true;
break;
}
}
if( !bFound )
return false;
}
return true;
}
/************************************************************************/
/* Download() */
/************************************************************************/
bool OGCAPIDataset::Download(
const CPLString& osURL,
const char* pszPostContent,
const char* pszAccept,
CPLString& osResult,
CPLString& osContentType,
bool bEmptyContentOK,
CPLStringList* paosHeaders )
{
char** papszOptions = nullptr;
CPLString osHeaders;
if( pszAccept )
{
osHeaders += "Accept: ";
osHeaders += pszAccept;
}
if( pszPostContent )
{
if( !osHeaders.empty() )
{
osHeaders += "\r\n";
}
osHeaders += "Content-Type: application/json";
}
if( !osHeaders.empty() )
{
papszOptions = CSLSetNameValue(papszOptions, "HEADERS", osHeaders.c_str());
}
if( !m_osUserPwd.empty() )
{
papszOptions = CSLSetNameValue(papszOptions,
"USERPWD", m_osUserPwd.c_str());
}
m_bMustCleanPersistent = true;
papszOptions =
CSLAddString(papszOptions, CPLSPrintf("PERSISTENT=OGCAPI:%p", this));
CPLString osURLWithQueryParameters(osURL);
if( !m_osUserQueryParams.empty() &&
osURL.find('?' + m_osUserQueryParams) == std::string::npos &&
osURL.find('&' + m_osUserQueryParams) == std::string::npos )
{
if( osURL.find('?') == std::string::npos )
{
osURLWithQueryParameters += '?';
}
else
{
osURLWithQueryParameters += '&';
}
osURLWithQueryParameters += m_osUserQueryParams;
}
if( pszPostContent )
{
papszOptions = CSLSetNameValue(papszOptions, "POSTFIELDS", pszPostContent);
}
CPLHTTPResult* psResult = CPLHTTPFetch(osURLWithQueryParameters, papszOptions);
CSLDestroy(papszOptions);
if( !psResult )
return false;
if( paosHeaders )
{
*paosHeaders = CSLDuplicate(psResult->papszHeaders);
}
if( psResult->pszErrBuf != nullptr )
{
CPLError(CE_Failure, CPLE_AppDefined, "%s",
psResult->pabyData ?
reinterpret_cast<const char*>(psResult->pabyData) :
psResult->pszErrBuf);
CPLHTTPDestroyResult(psResult);
return false;
}
if( psResult->pszContentType )
osContentType = psResult->pszContentType;
if( pszAccept != nullptr )
{
bool bFoundExpectedContentType = false;
if( strstr(pszAccept, "xml") &&
psResult->pszContentType != nullptr &&
(CheckContentType(psResult->pszContentType, MEDIA_TYPE_TEXT_XML) ||
CheckContentType(psResult->pszContentType, MEDIA_TYPE_APPLICATION_XML)) )
{
bFoundExpectedContentType = true;
}
if( strstr(pszAccept, MEDIA_TYPE_JSON_SCHEMA) &&
psResult->pszContentType != nullptr &&
(CheckContentType(psResult->pszContentType, MEDIA_TYPE_JSON) ||
CheckContentType(psResult->pszContentType, MEDIA_TYPE_JSON_SCHEMA)) )
{
bFoundExpectedContentType = true;
}
for( const char* pszMediaType : { MEDIA_TYPE_JSON,
MEDIA_TYPE_GEOJSON,
MEDIA_TYPE_OAPI_3_0,
})
{
if( strstr(pszAccept, pszMediaType) &&
psResult->pszContentType != nullptr &&
CheckContentType(psResult->pszContentType, pszMediaType) )
{
bFoundExpectedContentType = true;
break;
}
}
if( !bFoundExpectedContentType )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Unexpected Content-Type: %s",
psResult->pszContentType ?
psResult->pszContentType : "(null)" );
CPLHTTPDestroyResult(psResult);
return false;
}
}
if( psResult->pabyData == nullptr )
{
osResult.clear();
if( !bEmptyContentOK )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Empty content returned by server");
CPLHTTPDestroyResult(psResult);
return false;
}
}
else
{
osResult.assign(reinterpret_cast<const char*>(psResult->pabyData), psResult->nDataLen);
#ifdef DEBUG_VERBOSE
CPLDebug("OGCAPI", "%s", osResult.c_str());
#endif
}
CPLHTTPDestroyResult(psResult);
return true;
}
/************************************************************************/
/* DownloadJSon() */
/************************************************************************/
bool OGCAPIDataset::DownloadJSon(const CPLString& osURL,
CPLJSONDocument& oDoc,
const char* pszPostContent,
const char* pszAccept,
CPLStringList* paosHeaders)
{
CPLString osResult;
CPLString osContentType;
if( !Download(osURL, pszPostContent, pszAccept, osResult, osContentType, false, paosHeaders) )
return false;
return oDoc.LoadMemory( osResult );
}
/************************************************************************/
/* Identify() */
/************************************************************************/
int OGCAPIDataset::Identify(GDALOpenInfo* poOpenInfo)
{
if( STARTS_WITH_CI(poOpenInfo->pszFilename, "OGCAPI:") )
return TRUE;
if( EQUAL(CPLGetExtension(poOpenInfo->pszFilename), "moaw") )
return TRUE;
return FALSE;
}
/************************************************************************/
/* BuildURL() */
/************************************************************************/
CPLString OGCAPIDataset::BuildURL(const std::string& href) const
{
if( !href.empty() && href[0] == '/' )
return m_osRootURL + href;
return href;
}
/************************************************************************/
/* SetRootURLFromURL() */
/************************************************************************/
void OGCAPIDataset::SetRootURLFromURL(const std::string& osURL)
{
const char* pszStr = osURL.c_str();
const char* pszPtr = pszStr;
if( STARTS_WITH(pszPtr, "http://") )
pszPtr += strlen("http://");
else if( STARTS_WITH(pszPtr, "https://") )
pszPtr += strlen("https://");
pszPtr = strchr(pszPtr, '/');
if( pszPtr )
m_osRootURL.assign(pszStr, pszPtr - pszStr);
}
/************************************************************************/
/* InitFromFile() */
/************************************************************************/
bool OGCAPIDataset::InitFromFile(GDALOpenInfo* poOpenInfo)
{
CPLJSONDocument oDoc;
if( !oDoc.Load(poOpenInfo->pszFilename) )
return false;
auto oProcess = oDoc.GetRoot()["process"];
if( oProcess.GetType() != CPLJSONObject::Type::String )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find 'process' key in .moaw file");
return false;
}
const CPLString osURLProcess(oProcess.ToString());
SetRootURLFromURL(osURLProcess);
GByte* pabyContent = nullptr;
vsi_l_offset nSize = 0;
if( !VSIIngestFile(poOpenInfo->fpL, nullptr, &pabyContent, &nSize, 1024 * 1024) )
return false;
CPLString osPostContent( reinterpret_cast<const char*>(pabyContent) );
CPLFree(pabyContent);
if( !DownloadJSon(osURLProcess.c_str(), oDoc, osPostContent.c_str()) )
return false;
return InitFromCollection(poOpenInfo, oDoc);
}
/************************************************************************/
/* InitFromCollection() */
/************************************************************************/
bool OGCAPIDataset::InitFromCollection(GDALOpenInfo* poOpenInfo,
CPLJSONDocument& oDoc)
{
auto osTitle = oDoc.GetRoot().GetString("title");
if( !osTitle.empty() )
{
SetMetadataItem("TITLE", osTitle.c_str());
}
auto oLinks = oDoc.GetRoot().GetArray("links");
if( !oLinks.IsValid() )
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing links");
return false;
}
auto oBboxes = oDoc.GetRoot()["extent"]["spatial"]["bbox"].ToArray();
if( oBboxes.Size() != 1 )
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing bbox");
return false;
}
auto oBbox = oBboxes[0].ToArray();
if( oBbox.Size() != 4 )
{
CPLError(CE_Failure, CPLE_AppDefined, "Invalid bbox");
return false;
}
const double dfXMin = CPLAtof(CSLFetchNameValueDef(
poOpenInfo->papszOpenOptions, "MINX", CPLSPrintf("%.18g", oBbox[0].ToDouble())));
const double dfYMin = CPLAtof(CSLFetchNameValueDef(
poOpenInfo->papszOpenOptions, "MINY", CPLSPrintf("%.18g", oBbox[1].ToDouble())));
const double dfXMax = CPLAtof(CSLFetchNameValueDef(
poOpenInfo->papszOpenOptions, "MAXX", CPLSPrintf("%.18g", oBbox[2].ToDouble())));
const double dfYMax = CPLAtof(CSLFetchNameValueDef(
poOpenInfo->papszOpenOptions, "MAXY", CPLSPrintf("%.18g", oBbox[3].ToDouble())));
auto oScaleDenominator = oDoc.GetRoot()["scaleDenominator"];
double dfRes = 1e-8; // arbitrary
if( oScaleDenominator.IsValid() )
{
const double dfScaleDenominator = oScaleDenominator.ToDouble();
constexpr double HALF_CIRCUMFERENCE = 6378137 * M_PI;
dfRes = dfScaleDenominator / ((HALF_CIRCUMFERENCE / 180) / 0.28e-3);
}
double dfXSize = (dfXMax - dfXMin) / dfRes;
double dfYSize = (dfYMax - dfYMin) / dfRes;
while( dfXSize > INT_MAX || dfYSize > INT_MAX )
{
dfXSize /= 2;
dfYSize /= 2;
}
nRasterXSize = std::max(1, static_cast<int>(0+5 + dfXSize));
nRasterYSize = std::max(1, static_cast<int>(0.5 + dfYSize));
m_adfGeoTransform[0] = dfXMin;
m_adfGeoTransform[1] = (dfXMax - dfXMin) / nRasterXSize;
m_adfGeoTransform[3] = dfYMax;
m_adfGeoTransform[5] = -(dfYMax - dfYMin) / nRasterYSize;
CPLString osMapURL;
CPLString osTilesURL;
CPLString osCoverageURL;
bool bCoverageGeotiff = false;
CPLString osItemsJsonURL;
CPLString osSelfURL;
for( const auto& oLink: oLinks )
{
const auto osRel = oLink.GetString("rel");
const auto osType = oLink.GetString("type");
if( osRel == "http://www.opengis.net/def/rel/ogc/1.0/map" &&
osType == "application/json" )
{
osMapURL = BuildURL(oLink["href"].ToString());
}
else if( osRel == "http://www.opengis.net/def/rel/ogc/1.0/tilesets" &&
osType == "application/json" )
{
osTilesURL = BuildURL(oLink["href"].ToString());
}
else if( osRel == "http://www.opengis.net/def/rel/ogc/1.0/coverage" &&
(osType == "image/tiff; application=geotiff" ||
osType == "application/x-geotiff") )
{
if( !bCoverageGeotiff )
{
osCoverageURL = BuildURL(oLink["href"].ToString());
bCoverageGeotiff = true;
}
}
else if( osRel == "http://www.opengis.net/def/rel/ogc/1.0/coverage" &&
osType.empty() )
{
osCoverageURL = BuildURL(oLink["href"].ToString());
}
else if( osRel == "items" &&
(osType == "application/geo+json" ||
osType == "application/json") )
{
osItemsJsonURL = BuildURL(oLink["href"].ToString());
}
else if( osRel == "self" && osType == "application/json" )
{
osSelfURL = BuildURL(oLink["href"].ToString());
}
}
if( osMapURL.empty() && osTilesURL.empty() && osCoverageURL.empty() &&
osSelfURL.empty() && osItemsJsonURL.empty() )
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing map, tilesets, coverage or items relation in links");
return false;
}
const char* pszAPI = CSLFetchNameValueDef(
poOpenInfo->papszOpenOptions, "API", "AUTO");
if( (EQUAL(pszAPI, "AUTO") || EQUAL(pszAPI, "COVERAGE")) && !osCoverageURL.empty() )
{
return InitWithCoverageAPI(poOpenInfo, osCoverageURL, dfXMin, dfYMin, dfXMax, dfYMax, oDoc.GetRoot());
}
else if( (EQUAL(pszAPI, "AUTO") || EQUAL(pszAPI, "TILES")) && !osTilesURL.empty() )
{
return InitWithTilesAPI(poOpenInfo, osTilesURL, dfXMin, dfYMin, dfXMax, dfYMax, oDoc.GetRoot());
}
else if( (EQUAL(pszAPI, "AUTO") || EQUAL(pszAPI, "MAP")) && !osMapURL.empty() )
{
return InitWithMapAPI(poOpenInfo, osMapURL, dfXMin, dfYMin, dfXMax, dfYMax);
}
else if( (EQUAL(pszAPI, "AUTO") || EQUAL(pszAPI, "ITEMS")) &&
!osSelfURL.empty() && !osItemsJsonURL.empty() &&
(poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 )
{
m_poOAPIFDS = std::unique_ptr<GDALDataset>(
GDALDataset::Open(("OAPIF_COLLECTION:" + osSelfURL).c_str(), GDAL_OF_VECTOR));
if( m_poOAPIFDS )
return true;
}
CPLError(CE_Failure, CPLE_AppDefined, "API %s requested, but not available",
pszAPI);
return false;
}
/************************************************************************/
/* InitFromURL() */
/************************************************************************/
bool OGCAPIDataset::InitFromURL(GDALOpenInfo* poOpenInfo)
{
CPLAssert( STARTS_WITH_CI(poOpenInfo->pszFilename, "OGCAPI:") );
CPLJSONDocument oDoc;
CPLString osURL(poOpenInfo->pszFilename + strlen("OGCAPI:"));
if( !DownloadJSon(osURL, oDoc) )
return false;
SetRootURLFromURL(osURL);
auto oCollections = oDoc.GetRoot().GetArray("collections");
if( !oCollections.IsValid() )
{
if( !oDoc.GetRoot().GetArray("extent").IsValid() )
{
// If there is no "colletions" or "extent" member, then it is
// perhaps a landing page
const auto oLinks = oDoc.GetRoot().GetArray("links");
osURL.clear();
for( const auto& oLink: oLinks )
{
if( oLink["rel"].ToString() == "data" &&
oLink["type"].ToString() == "application/json" )
{
osURL = BuildURL(oLink["href"].ToString());
break;
}
}
if( !osURL.empty() )
{
if( !DownloadJSon(osURL, oDoc) )
return false;
oCollections = oDoc.GetRoot().GetArray("collections");
}
}
if( !oCollections.IsValid() )
{
// This is hopefully a /collections/{id} response
return InitFromCollection(poOpenInfo, oDoc);
}
}
// This is a /collections response
CPLStringList aosSubdatasets;
for( const auto& oCollection: oCollections )
{
const auto osTitle = oCollection.GetString("title");
const auto osLayerDataType = oCollection.GetString("layerDataType");
// CPLDebug("OGCAPI", "%s: %s", osTitle.c_str(), osLayerDataType.c_str());
if( !osLayerDataType.empty() &&
(EQUAL(osLayerDataType.c_str(), "Raster") ||
EQUAL(osLayerDataType.c_str(), "Coverage")) &&
(poOpenInfo->nOpenFlags & GDAL_OF_RASTER) == 0 )
{
continue;
}
if( !osLayerDataType.empty() &&
EQUAL(osLayerDataType.c_str(), "Vector") &&
(poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) == 0 )
{
continue;
}
osURL.clear();
const auto oLinks = oCollection.GetArray("links");
for( const auto& oLink: oLinks )
{
if( oLink["rel"].ToString() == "self" &&
oLink["type"].ToString() == "application/json" )
{
osURL = BuildURL(oLink["href"].ToString());
break;
}
else if( oLink["rel"].ToString() == "self" &&
oLink.GetString("type").empty() )
{
osURL = BuildURL(oLink["href"].ToString());
}
}
if( osURL.empty() )
{
continue;
}
const int nIdx = 1 + aosSubdatasets.size() / 2;
aosSubdatasets.AddNameValue(
CPLSPrintf("SUBDATASET_%d_NAME", nIdx),
CPLSPrintf("OGCAPI:%s", osURL.c_str()));
aosSubdatasets.AddNameValue(
CPLSPrintf("SUBDATASET_%d_DESC", nIdx),
CPLSPrintf("Collection %s", osTitle.c_str()));
}
SetMetadata(aosSubdatasets.List(), "SUBDATASETS");
return true;
}
/************************************************************************/
/* SelectImageURL() */
/************************************************************************/
static const CPLString SelectImageURL(const char* const* papszOptionOptions,
const CPLString& osPNG_URL,
const CPLString& osJPEG_URL)
{
const char* pszFormat = CSLFetchNameValueDef(papszOptionOptions,
"IMAGE_FORMAT",
"AUTO");
if( EQUAL(pszFormat, "AUTO") || EQUAL(pszFormat, "PNG_PREFERRED") )
return !osPNG_URL.empty() ? osPNG_URL : osJPEG_URL;
else if( EQUAL(pszFormat, "PNG") )
return osPNG_URL;
else if( EQUAL(pszFormat, "JPEG") )
return osJPEG_URL;
else if ( EQUAL(pszFormat, "JPEG_PREFERRED") )
return !osJPEG_URL.empty() ? osJPEG_URL : osPNG_URL;
return CPLString();
}
/************************************************************************/
/* SelectVectorFormatURL() */
/************************************************************************/
static const CPLString SelectVectorFormatURL(const char* const* papszOptionOptions,
const CPLString& osMVT_URL,
const CPLString& osGEOJSON_URL)
{
const char* pszFormat = CSLFetchNameValueDef(papszOptionOptions,
"VECTOR_FORMAT",
"AUTO");
if( EQUAL(pszFormat, "AUTO") || EQUAL(pszFormat, "MVT_PREFERRED") )
return !osMVT_URL.empty() ? osMVT_URL : osGEOJSON_URL;
else if( EQUAL(pszFormat, "MVT") )
return osMVT_URL;
else if( EQUAL(pszFormat, "GEOJSON") )
return osGEOJSON_URL;
else if ( EQUAL(pszFormat, "GEOJSON_PREFERRED") )
return !osGEOJSON_URL.empty() ? osGEOJSON_URL : osMVT_URL;
return CPLString();
}
/************************************************************************/
/* InitWithMapAPI() */
/************************************************************************/
bool OGCAPIDataset::InitWithMapAPI(GDALOpenInfo* poOpenInfo,
const CPLString& osMapURL,
double dfXMin, double dfYMin,
double dfXMax, double dfYMax)
{
CPLJSONDocument oDoc;
if( !DownloadJSon(osMapURL.c_str(), oDoc) )
return false;
auto oStyles = oDoc.GetRoot()["styles"].ToArray();
if( oStyles.Size() == 0 )
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot find styles");
return false;
}
CPLString osStyleId;
CPLString osPNG_URL;
CPLString osJPEG_URL;
for( const auto& oStyle: oStyles )
{
const auto osId = oStyle["id"].ToString();
if (osId.empty() )
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing style id");
return false;
}
if( osId == "default" || osStyleId.empty() )
{
osStyleId = osId;
auto oLinks = oStyle["links"].ToArray();
if( oLinks.Size() == 0 )
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing links in style");
return false;
}
for( const auto& oLink: oLinks )
{
if( oLink["rel"].ToString() == "http://www.opengis.net/def/rel/ogc/1.0/map" &&
oLink["type"].ToString() == "image/png" )
{
osPNG_URL = BuildURL(oLink["href"].ToString());
}
else if( oLink["rel"].ToString() == "http://www.opengis.net/def/rel/ogc/1.0/map" &&
oLink["type"].ToString() == "image/jpeg" )
{
osJPEG_URL = BuildURL(oLink["href"].ToString());
}
}
}
}
if( osStyleId.empty() )
{
CPLError(CE_Failure, CPLE_AppDefined, "Cannot find a style");
return false;
}
CPLString osImageURL = SelectImageURL(poOpenInfo->papszOpenOptions,
osPNG_URL,
osJPEG_URL);
if( osImageURL.empty() )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find link to PNG or JPEG images");
return false;
}
const int l_nBands = ((osImageURL == osPNG_URL) ? 4 : 3);
int nOverviewCount = 0;