skylarmt/postserve
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added support buffer-size

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Taro Matsuzawa 2019-03-22 14:30:09 +09:00
parent 5ec1b6f107
commit 841932e0f4
2 changed files with 5 additions and 3 deletions
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3
Dockerfile
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@ -4,7 +4,8 @@ WORKDIR /usr/src/app
VOLUME /mapping
COPY . /usr/src/app/
COPY requirements.txt /usr/src/app/
RUN pip install --no-cache-dir -r requirements.txt
COPY server.py /usr/src/app/
CMD ["python", "-u","/usr/src/app/server.py"]

5
server.py
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@ -26,10 +26,11 @@ def GeneratePrepared(layers):
queries = []
prepared = "PREPARE gettile(geometry, numeric, numeric, numeric) AS "
for layer in layers['Layer']:
buffer_size = str(layer['properties']['buffer-size'])
layer_query = layer['Datasource']['table'].lstrip().rstrip() # Remove lead and trailing whitespace
layer_query = layer_query[1:len(layer_query)-6] # Remove enough characters to remove first and last () and "AS t"
layer_query = layer_query.replace("geometry", "ST_AsMVTGeom(geometry,!bbox!,4096,0,true) AS mvtgeometry")
base_query = "SELECT ST_ASMVT(tile, '"+layer['id']+"', 4096, 'mvtgeometry') FROM ("+layer_query+" WHERE ST_AsMVTGeom(geometry, !bbox!,4096,0,true) IS NOT NULL) AS tile"
layer_query = layer_query.replace("geometry", f"ST_AsMVTGeom(geometry,!bbox!,4096,{buffer_size},true) AS mvtgeometry")
base_query = f"SELECT ST_ASMVT(tile, '{layer['id']}', 4096, 'mvtgeometry') FROM ({layer_query} WHERE ST_AsMVTGeom(geometry, !bbox!,4096,{buffer_size},true) IS NOT NULL) AS tile"
queries.append(base_query.replace("!bbox!","$1").replace("!scale_denominator!","$2").replace("!pixel_width!","$3").replace("!pixel_height!","$4"))
prepared = prepared + " UNION ALL ".join(queries) + ";"
print(prepared)