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Add Support for WCS Probe - WcsGetCoverage (#422)
* Create wcs.py Hello, I would like to support this project and I made a sample for checking (OGC) Web Coverage Service. I hope it can be included in the project. Kind regards. * add plugins/probe/wcs.py to config_main.py, add resource (PDOK AHN WCS) & probe_vars (DOK AHN WCS - GetCaps and PDOK AHN WCS - GetCoverage v2.0.1) to tests/data/resources.json and update wcs.py * update wcs.py
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| from GeoHealthCheck.probe import Probe | ||
| from owslib.wcs import WebCoverageService | ||
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| class WcsGetCoverage(Probe): | ||
| """ | ||
| Get WCS coverage image using the OGC WCS GetCoverage v2.0.1 Operation. | ||
| """ | ||
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| NAME = 'WCS GetCoverage v2.0.1' | ||
| DESCRIPTION = """ | ||
| Do WCS GetCoverage v2.0.1 request with user-specified parameters | ||
| for single Layer. | ||
| """ | ||
| RESOURCE_TYPE = 'OGC:WCS' | ||
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| REQUEST_METHOD = 'GET' | ||
| REQUEST_TEMPLATE = '?SERVICE=WCS&VERSION=2.0.1' + \ | ||
| '&REQUEST=GetCoverage&COVERAGEID={layers}' + \ | ||
| '&FORMAT={format}' + \ | ||
| '&SUBSET=x({subset[0]},{subset[2]})' + \ | ||
| '&SUBSET=y({subset[1]},{subset[3]})' + \ | ||
| '&SUBSETTINGCRS={subsetting_crs}' + \ | ||
| '&WIDTH={width}&HEIGHT={height}' | ||
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| PARAM_DEFS = { | ||
| 'layers': { | ||
| 'type': 'stringlist', | ||
| 'description': 'The WCS Layer ID, select one', | ||
| 'default': [], | ||
| 'required': True, | ||
| 'range': None | ||
| }, | ||
| 'format': { | ||
| 'type': 'string', | ||
| 'description': 'Image outputformat', | ||
| 'default': [], | ||
| 'required': True, | ||
| 'range': None | ||
| }, | ||
| 'subset': { | ||
| 'type': 'bbox', | ||
| 'description': 'The WCS subset of x and y axis', | ||
| 'default': ['-180', '-90', '180', '90'], | ||
| 'required': True, | ||
| 'range': None | ||
| }, | ||
| 'subsetting_crs': { | ||
| 'type': 'string', | ||
| 'description': 'The crs of SUBSET and also OUTPUTCRS', | ||
| 'default': '', | ||
| 'required': True, | ||
| 'range': None | ||
| }, | ||
| 'width': { | ||
| 'type': 'string', | ||
| 'description': 'The image width', | ||
| 'default': '10', | ||
| 'required': True | ||
| }, | ||
| 'height': { | ||
| 'type': 'string', | ||
| 'description': 'The image height', | ||
| 'default': '10', | ||
| 'required': True | ||
| } | ||
| } | ||
| """Param defs""" | ||
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| CHECKS_AVAIL = { | ||
| 'GeoHealthCheck.plugins.check.checks.HttpStatusNoError': { | ||
| 'default': True | ||
| }, | ||
| 'GeoHealthCheck.plugins.check.checks.NotContainsOwsException': { | ||
| 'default': True | ||
| }, | ||
| 'GeoHealthCheck.plugins.check.checks.HttpHasImageContentType': { | ||
| 'default': True | ||
| } | ||
| } | ||
| """ | ||
| Checks for WCS GetCoverage Response available. | ||
| Optionally override Check PARAM_DEFS using set_params | ||
| e.g. with specific `value` or even `name`. | ||
| """ | ||
| def __init__(self): | ||
| Probe.__init__(self) | ||
| self.layer_count = 0 | ||
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| def get_metadata(self, resource, version='2.0.1'): | ||
| """ | ||
| Get metadata, specific per Resource type. | ||
| :param resource: | ||
| :param version: | ||
| :return: Metadata object | ||
| """ | ||
| return WebCoverageService(resource.url, version=version) | ||
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| # Overridden: expand param-ranges from WCS metadata | ||
| def expand_params(self, resource): | ||
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| # Use WCS Capabilities doc to get metadata for | ||
| # PARAM_DEFS ranges/defaults | ||
| try: | ||
| wcs = self.get_metadata_cached(resource, version='2.0.1') | ||
| layers = wcs.contents | ||
| self.layer_count = len(layers) | ||
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| # Layers to select | ||
| self.PARAM_DEFS['layers']['range'] = list(layers.keys()) | ||
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| # Take random layer to determine generic attrs | ||
| for layer_name in layers: | ||
| layer_entry = layers[layer_name] | ||
| break | ||
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| # Image Format | ||
| self.PARAM_DEFS['format']['range'] = layer_entry.supportedFormats | ||
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| # SRS | ||
| bbox = layer_entry.boundingboxes | ||
| subsetting_crs = bbox[0]['nativeSrs'] | ||
| self.PARAM_DEFS['subsetting_crs']['default'] = subsetting_crs | ||
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| # BBOX | ||
| self.log('bbox: %s' % str(bbox[0]['bbox'])) | ||
| self.PARAM_DEFS['subset']['default'] = bbox[0]['bbox'] | ||
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| except Exception as err: | ||
| raise err |
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