Problem with extensional Operator "Get Pages"

Hi,

I have a problem with the Operator "Get Pages" from Web Mining Extension.

It seems like that the operator is having a coding problem with UTF-8 charakters such aus "Ü".

With Mozilla Firefox I get a json-response with results after calling the URL "https://itunes.apple.com/search?term="Google Übersetzer"&entity=software&country=de&media=software&limit=5".

By calling this URL via Operator "Get Pages" I get a json-result but without an search-result.

Thats my test-process:

<?xml version="1.0" encoding="UTF-8"?><process version="7.5.001">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="7.5.001" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <process expanded="true">
      <operator activated="true" class="generate_data" compatibility="7.5.001" expanded="true" height="68" name="Generate Data" width="90" x="45" y="34">
        <parameter key="target_function" value="random"/>
        <parameter key="number_examples" value="1"/>
        <parameter key="number_of_attributes" value="1"/>
        <parameter key="attributes_lower_bound" value="-10.0"/>
        <parameter key="attributes_upper_bound" value="10.0"/>
        <parameter key="gaussian_standard_deviation" value="10.0"/>
        <parameter key="largest_radius" value="10.0"/>
        <parameter key="use_local_random_seed" value="false"/>
        <parameter key="local_random_seed" value="1992"/>
        <parameter key="datamanagement" value="double_array"/>
        <parameter key="data_management" value="auto"/>
      </operator>
      <operator activated="true" class="generate_attributes" compatibility="7.5.001" expanded="true" height="82" name="Generate Attributes" width="90" x="179" y="34">
        <list key="function_descriptions">
          <parameter key="att1" value="&quot;https://itunes.apple.com/search?term=\&quot;Google Übersetzer\&quot;&amp;entity=software&amp;country=de&amp;media=software&amp;limit=5&quot;"/>
        </list>
        <parameter key="keep_all" value="true"/>
      </operator>
      <operator activated="true" class="web:retrieve_webpages" compatibility="7.3.000" expanded="true" height="68" name="getPage" width="90" x="313" y="34">
        <parameter key="link_attribute" value="att1"/>
        <parameter key="page_attribute" value="html"/>
        <parameter key="random_user_agent" value="false"/>
        <parameter key="user_agent" value="Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0"/>
        <parameter key="connection_timeout" value="2000"/>
        <parameter key="read_timeout" value="2000"/>
        <parameter key="follow_redirects" value="true"/>
        <parameter key="accept_cookies" value="none"/>
        <parameter key="cookie_scope" value="global"/>
        <parameter key="request_method" value="POST"/>
        <parameter key="delay" value="random"/>
        <parameter key="delay_amount" value="5000"/>
        <parameter key="min_delay_amount" value="2000"/>
        <parameter key="max_delay_amount" value="5000"/>
      </operator>
      <connect from_op="Generate Data" from_port="output" to_op="Generate Attributes" to_port="example set input"/>
      <connect from_op="Generate Attributes" from_port="example set output" to_op="getPage" to_port="Example Set"/>
      <connect from_op="getPage" from_port="Example Set" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

Can you reproduce the issue and do you think that this is a bug of the operator or do I have to escape the url and if yes in which way?

Regards

Johannes