I'm having trouble hitting a WMS referenced from within my .map file. Instead
of the image from the WMS being drawn as a layer in my map, I instead get an
error logged of "request failed with curl error code 60 (SSL certificate
problem: unable to get local issuer certificate) for
https://basemap.nationalmap.gov/arcgis/services/USGSTopo/MapServer/WmsServer?LAYERS=0&REQUEST=GetMap&SERVICE=WMS&;...<remainder
omitted for brevity>"
The confusing thing to me is that the exact same .map file works just fine to
produce a map image containing the referenced layer when I run mapserver -nh at
a command prompt. i.e. mapserv -nh "QUERY_STRING=map=test.map&...<remainder
omitted for brevity>" > test.png
I've configured a CURL_CA_BUNDLE environment variable pointing to a
curl-ca-bundle.crt file and I think the fact that I can reach that external WMS
when running the mapserv command at a command prompt would indicate it's
configured correctly. Any thoughts on what could cause the failure I'm seeing
though MapServer running on Windows though IIS as a FastCGI app while
succeeding when running the same .map file at a command prompt? Or any
thoughts on what I might try to troubleshoot further?
.map file contents are below
MAP
NAME "MAP"
CONFIG "MS_ERRORFILE" "e:/LogFiles/ms_error3.txt"
CONFIG "PROJ_LIB" "E:/ms/projlib/"
DEBUG 5
EXTENT -20037508.342789244 -20037508.342789244 20037508.342789244
20037508.342789244
SIZE 256 256
SYMBOLSET "E:\ms\basedata\symbols.txt"
FONTSET "E:\ms\basedata\fonts.txt"
IMAGECOLOR 255 255 255
TRANSPARENT ON
DEFRESOLUTION 72
RESOLUTION 72
UNITS meters
PROJECTION "init=epsg:3857" END
WEB
METADATA
"wms_enable_request" "*"
END
END
LAYER
STATUS DEFAULT TYPE RASTER NAME "WMS_DRG"
DEBUG 5
CONNECTIONTYPE WMS CONNECTION
"https://basemap.nationalmap.gov/arcgis/services/USGSTopo/MapServer/WmsServer?";
PROJECTION "init=epsg:3857" END
METADATA
"wms_srs" "EPSG:3857"
"wms_name" "0"
"wms_server_version" "1.1.1"
"wms_format" "image/png"
END
END
END
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