Unicode problem in creating style with REST API on GeoServer

Question

I am creating some new style with Postman. The main problem is that the new style was created with Unicode problem. It means I am seeing the new style has some character that are not Unicode.

URL : http://localhost:8090/geoserver/rest/workspaces/webgis/styles

HTTP Post

<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc"
  xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
  <NamedLayer>
<Name>export_output8464daf0723</Name>
<UserStyle>
<Title>export_output8464daf071</Title>
<Name>export_output8464daf0732</Name>
 <FeatureTypeStyle>
   <Rule>
       <Name>export_output8464daf071_site_name_1</Name>
       <Title>export_output8464daf071_site_name_1_تپه قورچی</Title>
       <ogc:Filter>
         <ogc:PropertyIsEqualTo>
           <ogc:PropertyName>site_name</ogc:PropertyName>
           <ogc:Literal>تست</ogc:Literal>
         </ogc:PropertyIsEqualTo>
       </ogc:Filter>
       <PointSymbolizer>
          <Graphic>
         <Mark>
           <WellKnownName>circle</WellKnownName>
           <Fill>
             <CssParameter name="fill">#bd8321</CssParameter>
           </Fill>
         </Mark>
         <Size>2</Size>
       </Graphic>
     </PointSymbolizer>
   </Rule>
 </FeatureTypeStyle>
</UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>

and Content type is :

application/vnd.ogc.sld+xml

Style in GeoServer is :

<?xml version="1.0" encoding="UTF-8"?><sld:StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:sld="http://www.opengis.net/sld" xmlns:gml="http://www.opengis.net/gml" xmlns:ogc="http://www.opengis.net/ogc" version="1.0.0">
  <sld:NamedLayer>
    <sld:Name>export_output8464daf0732</sld:Name>
    <sld:UserStyle>
      <sld:Name>export_output8464daf0732</sld:Name>
      <sld:Title>export_output8464daf071</sld:Title>
      <sld:FeatureTypeStyle>
        <sld:Name>name</sld:Name>
        <sld:Rule>
          <sld:Name>export_output8464daf071_site_name_1</sld:Name>
          <sld:Title>export_output8464daf071_site_name_1_ط·ع¾ط¸آ¾ط¸â€، ط¸â€ڑط¸ث†ط·آ±ط¹â€ ط؛إ’</sld:Title>
          <ogc:Filter>
            <ogc:PropertyIsEqualTo>
              <ogc:PropertyName>site_name</ogc:PropertyName>
              <ogc:Literal>ط·ع¾ط·آ³ط·ع¾</ogc:Literal>
            </ogc:PropertyIsEqualTo>
          </ogc:Filter>
          <sld:PointSymbolizer>
            <sld:Graphic>
              <sld:Mark>
                <sld:WellKnownName>circle</sld:WellKnownName>
                <sld:Fill>
                  <sld:CssParameter name="fill">#bd8321</sld:CssParameter>
                </sld:Fill>
              </sld:Mark>
              <sld:Size>2</sld:Size>
            </sld:Graphic>
          </sld:PointSymbolizer>
        </sld:Rule>
      </sld:FeatureTypeStyle>
    </sld:UserStyle>
  </sld:NamedLayer>
</sld:StyledLayerDescriptor>

Answer 1

After a lot of googling , I understood Java on windows does NOT support Unicode output by default. As we know, GeoServer made by JAVA too, so we have to do some stuff for fixing this issue.

1. Add this variable to your System Environment Variable.

JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF-8 

2. Open CMD (RUN AS Administrator) and run this command

C:\WINDOWS\system32>chcp 65001

and you will see this message : Active code page: 65001

Point 1 : Do not forget to restart your computer or 1 - close your explorer and open it and then 2 - restart you GeoServer service from Services.

Point 2 : Your XML should be start with :

<?xml version="1.0" encoding="UTF-8"?>

Point 3 : You do not need to add charset=UTF-8 in end of Content-Type. So you can set to :

Content-Type=application/vnd.ogc.sld+xml