Adaguc-server configuration: Validate allowed characters in style and legend names during scanning

[maartenplieger]

Style and legend names are identifiers used in urls. We have seen style names in configurations with invalid tokens.

Validate stylenames, e.g. The stylename should not contain escapable characters like <, \ , /, >, (, ), etc.

The following style should be considered invalid:

  <Style name="dBZ>0(3D)">
    <Legend fixedclasses="true" tickinterval="10">dBZ>0(3D)</Legend>
    <Min>0</Min>
    <Max>80</Max>
    <ValueRange min="-50" max="80" />
    <RenderMethod>nearest,bilinear</RenderMethod>
    <NameMapping name="nearest" title="dBZ>0, nearest" abstract="Nearest neighbour interpolation"/>
    <NameMapping name="bilinear" title="dBZ>0, bilinear" abstract="Bilinear interpolation"/>
  </Style>

Instead it should be:

  <Style name="dBZ_more_than_0_3D">
    <Legend fixedclasses="true" tickinterval="10">dBZ_more_than_0_3D</Legend>
    <Min>0</Min>
    <Max>80</Max>
    <ValueRange min="-50" max="80" />
    <RenderMethod>nearest,bilinear</RenderMethod>
    <NameMapping name="nearest" title="dBZ>0, nearest" abstract="Nearest neighbour interpolation"/>
    <NameMapping name="bilinear" title="dBZ>0, bilinear" abstract="Bilinear interpolation"/>
  </Style>