function GetTile()
{
$wmsRequest = new lizmapWMTSRequest($this->project, $this->params);
$result = $wmsRequest->process();
$rep = $this->getResponse('binary');
$rep->mimeType = $result->mime;
$rep->content = $result->data;
$rep->doDownload = false;
$rep->outputFileName = 'qgis_server_wmts_tile_' . $this->repository->getKey() . '_' . $this->project->getKey();
$rep->setHttpStatus($result->code, '');
if (!preg_match('/^image/', $result->mime)) {
return $rep;
}
// HTTP browser cache expiration time
$layername = $this->params["layer"];
$lproj = $this->project;
$configLayers = $lproj->getLayers();
if (property_exists($configLayers, $layername)) {
$configLayer = $configLayers->{$layername};
if (property_exists($configLayer, 'clientCacheExpiration')) {
$clientCacheExpiration = (int) $configLayer->clientCacheExpiration;
$rep->setExpires("+" . $clientCacheExpiration . " seconds");
}
}
lizmap::logMetric('LIZMAP_SERVICE_GETMAP');
return $rep;
}
/**
* Get data from map service or from the cache.
* @param lizmapProject $project The project.
* @param array $params Array of parameters.
* @return array $data Normalized and filtered array.
*/
public static function getMap($project, $params, $forced = False)
{
// Get cache if exists
$keyParams = array();
foreach ($params as $pk => $value) {
if (in_array($pk, array("bbox", "format", "height", "layers", "transparent"))) {
$keyParams[$pk] = $value;
}
}
ksort($keyParams);
$layers = str_replace(',', '_', $params['layers']);
$crs = preg_replace('#[^a-zA-Z0-9_]#', '_', $params['crs']);
// Get repository data
$ser = lizmap::getServices();
$lrep = $project->getRepository();
$lproj = $project;
$project = $lproj->getKey();
$repository = $lrep->getKey();
// Change to true to put some information in debug files
$debug = $ser->debugMode;
// Read config file for the current project
$layername = $params["layers"];
$configLayers = $lproj->getLayers();
$configLayer = null;
if (property_exists($configLayers, $layername)) {
$configLayer = $configLayers->{$layername};
}
// Set or get tile from the parent project in case of embedded layers
if ($configLayer and property_exists($configLayer, 'sourceRepository') and property_exists($configLayer, 'sourceProject')) {
$newRepository = (string) $configLayer->sourceRepository;
$newProject = (string) $configLayer->sourceProject;
$repository = $newRepository;
$project = $newProject;
$lrep = lizmap::getRepository($repository);
if (!$lrep) {
jMessage::add('The repository ' . strtoupper($repository) . ' does not exist !', 'RepositoryNotDefined');
return array('error', 'text/plain', '404');
}
try {
$lproj = lizmap::getProject($repository . '~' . $project);
if (!$lproj) {
jMessage::add('The lizmapProject ' . strtoupper($project) . ' does not exist !', 'ProjectNotDefined');
return array('error', 'text/plain', '404');
}
} catch (UnknownLizmapProjectException $e) {
jLog::logEx($e, 'error');
jMessage::add('The lizmapProject ' . strtoupper($project) . ' does not exist !', 'ProjectNotDefined');
return array('error', 'text/plain', '404');
}
}
$key = md5(serialize($keyParams));
// Get tile cache virtual profile (tile storage)
// And get tile if already in cache
// --> must be done after checking that parent project is involved
$profile = lizmapProxy::createVirtualProfile($repository, $project, $layers, $crs);
if ($debug) {
lizmap::logMetric('LIZMAP_PROXY_READ_LAYER_CONFIG');
}
// Has the user asked for cache for this layer ?
$useCache = False;
if ($configLayer) {
$useCache = strtolower($configLayer->cached) == 'true';
}
// Avoid using cache for requests concerning not square tiles or too big
// Focus on real web square tiles
$wmsClient = 'web';
if ($useCache and $params['width'] != $params['height'] and ($params['width'] > 300 or $params['height'] > 300)) {
$wmsClient = 'gis';
$useCache = False;
}
if ($useCache and !$forced) {
$tile = jCache::get($key, $profile);
if ($tile) {
$_SESSION['LIZMAP_GETMAP_CACHE_STATUS'] = 'read';
$mime = 'image/jpeg';
if (preg_match('#png#', $params['format'])) {
$mime = 'image/png';
}
if ($debug) {
lizmap::logMetric('LIZMAP_PROXY_HIT_CACHE');
}
return array($tile, $mime, 200);
}
}
// ***************************
// No cache hit : need to ask the tile from QGIS Server
// ***************************
// Construction of the WMS url : base url + parameters
$url = $ser->wmsServerURL . '?';
// Add project path into map parameter
$params["map"] = realpath($lproj->getQgisPath());
// Metatile : if needed, change the bbox
// Avoid metatiling when the cache is not active for the layer
$metatileSize = '1,1';
if ($configLayer and property_exists($configLayer, 'metatileSize')) {
if (preg_match('#^[3579],[3579]$#', $configLayer->metatileSize)) {
$metatileSize = $configLayer->metatileSize;
}
}
# Metatile buffer
$metatileBuffer = 5;
// Also checks if gd is installed
if ($metatileSize and $useCache and $wmsClient == 'web' and extension_loaded('gd') && function_exists('gd_info')) {
# Metatile Size
$metatileSizeExp = explode(',', $metatileSize);
$metatileSizeX = (int) $metatileSizeExp[0];
$metatileSizeY = (int) $metatileSizeExp[1];
# Get requested bbox
$bboxExp = explode(',', $params['bbox']);
$width = $bboxExp[2] - $bboxExp[0];
$height = $bboxExp[3] - $bboxExp[1];
# Calculate factors
$xFactor = (int) ($metatileSizeX / 2);
$yFactor = (int) ($metatileSizeY / 2);
# Calculate the new bbox
$xmin = $bboxExp[0] - $xFactor * $width - $metatileBuffer * $width / $params["width"];
$ymin = $bboxExp[1] - $yFactor * $height - $metatileBuffer * $height / $params["height"];
$xmax = $bboxExp[2] + $xFactor * $width + $metatileBuffer * $width / $params["width"];
$ymax = $bboxExp[3] + $yFactor * $height + $metatileBuffer * $height / $params["height"];
# Replace request bbox by metatile bbox
$params["bbox"] = "{$xmin},{$ymin},{$xmax},{$ymax}";
# Keep original param value
$originalParams = array("width" => $params["width"], "height" => $params["height"]);
# Replace width and height before requesting the image from qgis
$params["width"] = $metatileSizeX * $params["width"] + 2 * $metatileBuffer;
$params["height"] = $metatileSizeY * $params["height"] + 2 * $metatileBuffer;
}
// Build params before send the request to Qgis
$builtParams = http_build_query($params);
// Replace needed characters (not needed for php >= 5.4, just use the 4th parameter of the method http_build_query)
$a = array('+', '_', '.', '-');
$b = array('%20', '%5F', '%2E', '%2D');
$builtParams = str_replace($a, $b, $builtParams);
// Get data from the map server
$proxyMethod = $ser->proxyMethod;
$getRemoteData = lizmapProxy::getRemoteData($url . $builtParams, $proxyMethod, $debug);
$data = $getRemoteData[0];
$mime = $getRemoteData[1];
$code = $getRemoteData[2];
if ($debug) {
lizmap::logMetric('LIZMAP_PROXY_REQUEST_QGIS_MAP');
}
if ($useCache && !preg_match('/^image/', $mime)) {
$useCache = False;
}
// Metatile : if needed, crop the metatile into a single tile
// Also checks if gd is installed
if ($metatileSize and $useCache and $wmsClient == 'web' and extension_loaded('gd') && function_exists('gd_info')) {
# Save original content into an image var
$original = imagecreatefromstring($data);
# crop parameters
$newWidth = (int) $originalParams["width"];
// px
$newHeight = (int) $originalParams["height"];
// px
$positionX = (int) ($xFactor * $originalParams["width"]) + $metatileBuffer;
// left translation of 30px
$positionY = (int) ($yFactor * $originalParams["height"]) + $metatileBuffer;
// top translation of 20px
# create new gd image
$image = imageCreateTrueColor($newWidth, $newHeight);
# save transparency if needed
if (preg_match('#png#', $params['format'])) {
imagesavealpha($original, true);
imagealphablending($image, false);
$color = imagecolortransparent($image, imagecolorallocatealpha($image, 0, 0, 0, 127));
imagefill($image, 0, 0, $color);
imagesavealpha($image, true);
}
# crop image
imagecopyresampled($image, $original, 0, 0, $positionX, $positionY, $newWidth, $newHeight, $newWidth, $newHeight);
# Output the image as a string (use PHP buffering)
ob_start();
if (preg_match('#png#', $params['format'])) {
imagepng($image, null, 9);
} else {
imagejpeg($image, null, 90);
}
$data = ob_get_contents();
// read from buffer
ob_end_clean();
// delete buffer
// Destroy image handlers
imagedestroy($original);
imagedestroy($image);
if ($debug) {
lizmap::logMetric('LIZMAP_PROXY_CROP_METATILE');
}
}
$_SESSION['LIZMAP_GETMAP_CACHE_STATUS'] = 'off';
// Store into cache if needed
if ($useCache) {
//~ jLog::log( ' Store into cache');
$cacheExpiration = (int) $ser->cacheExpiration;
if (property_exists($configLayer, 'cacheExpiration')) {
$cacheExpiration = (int) $configLayer->cacheExpiration;
}
jCache::set($key, $data, $cacheExpiration, $profile);
$_SESSION['LIZMAP_GETMAP_CACHE_STATUS'] = 'write';
if ($debug) {
lizmap::logMetric('LIZMAP_PROXY_WRITE_CACHE');
}
}
return array($data, $mime, $code);
}