[MapProxy] Any clue - could not retrieve WMS map: No response from URL

[fisensmosse at gmail.com]

Hi
I can´t have the wms source from 
https://daim.lfv.se/geoserver/mais/wms?SERVICE=WMS&REQUEST=GetCapabilities 
working. My config results in mapproxy.source.wms:get_map - could not 
retrieve WMS map: No response from URL - every time.
I can fetch wms images though curl / web reader without any problems, 
but not with mapproxy.

Anyone with a idea whats wrong?

I did see the header - Transfer-Encoding: chunked
in the response, do mapproxy support that?

layers:
   - name: lfv
     title: LFV
     sources: [lfv_cache]

caches:
   lfv_cache:
     grids: [webmercator_hq]
     sources: [lfv_source]
     cache:
       type: mbtiles
     link_single_color_images: true

sources:
   lfv_source:
     type: wms
     req:
       url: https://daim.lfv.se/geoserver/wms?
       layers: RSTA
       transparent: True
     wms_opts:
       version: '1.3.0'
     supported_srs: ['EPSG:4326', 'EPSG:900913', 'EPSG:3857']
     coverage:
       bbox: [7.697500, 54.789969, 25.491981, 69.149749]
       srs: 'EPSG:4326'
     http:
       headers:
         Host: daim.lfv.se
         Referer: https://daim.lfv.se

grids:
   webmercator_hq:
     base: GLOBAL_WEBMERCATOR
     tile_size: [512, 512]
     origin: nw