[PyWPS-dev] XML parser for Docker container

[Adam Laža]

Hi devs,

I have a problem with xml parsing when using alpine/flask Dockerfile [1]
(the only minor change is upgraded Xerces version to 3.2.1 and added curl
package to apk). After building and starting a container I tried to send
sample POST request using curl from within the running container (I checked
the xml and it's well-formated):

curl -d pywps-flask/static/requests/execute_buffer_post.xml
localhost:5000/wps

but I got ExceptionError:

<?xml version="1.0" encoding="UTF-8"?>
<!-- PyWPS 4.0.0 -->
<ows:ExceptionReport xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
http://www.opengis.net/ows/1.1
http://schemas.opengis.net/ows/1.1.0/owsExceptionReport.xsd"
version="1.0.0">
  <ows:Exception exceptionCode="NoApplicableCode" locator="" >
      <ows:ExceptionText>Start tag expected, '<' not found, line 1,
column 1</ows:ExceptionText>
  </ows:Exception>
</ows:ExceptionReport>



I also tried to use OWSLib to send the request and I get the result code
but the output in response is not well-formated:

        <wps:Output>
            <ows:Identifier>buff_out</ows:Identifier>
            <ows:Title>Buffered file</ows:Title>
            <ows:Abstract></ows:Abstract>
            <wps:Data>
                <wps:ComplexData mimeType="application/gml+xml" encoding=""
schema="">
                    <![CDATA[
                            <ogr:FeatureCollection xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xmlns:ogr="
http://ogr.maptools.org/" xmlns:gml="http://www.opengis.net/gml"
xsi:schemaLocation="
http://schemas.opengis.net/gml/2.1.2/feature.xsd">
  <gml:boundedBy>
    <gml:Box>

<gml:coord><gml:X>-0.9514645979959721</gml:X><gml:Y>-0.986306232731747</gml:Y></gml:coord>

<gml:coord><gml:X>1.048535402004028</gml:X><gml:Y>1.013693767268253</gml:Y></gml:coord>
    </gml:Box>
  </gml:boundedBy>


  <gml:featureMember>
    <ogr:point_buffer fid="point_buffer.0">

<ogr:geometryProperty><gml:Polygon><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>1.04853540200403,0.013693767268253
1.0471649367586,-0.038642188974691 1.0430572973723,-0.0908346959994
11.03622374259917,0.170128232308481 1.0430572973723,0.118222230535904
1.0471649367586,0.066029723511194
1.04853540200403,0.013693767268253</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs></gml:Polygon></ogr:geometryProperty>
    </ogr:point_buffer>
  </gml:featureMember>
</ogr:FeatureCollection>

                    ]]>
                </wps:ComplexData>
            </wps:Data>
        </wps:Output>

Any idea what could be wrong? I hadn't this problem before. It started
after I built a new Docker image (but from the same Dockerfile). I suspect
expat or xerces but not really sure what I should be looking for.

Cheers,
Adam


[1]:
https://github.com/geopython/pywps-flask/blob/master/docker/alpine/flask/Dockerfile
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