[mapserver-users] getting corrupted png with WMS request to mapserv CGI on command line

Wed May 27 06:48:59 PDT 2015

What do you see if you view the corrupt PNG file in a text editor?

-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Renzo Kottmann
Sent: Wednesday, May 27, 2015 4:47 AM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] getting corrupted png with WMS request to mapserv CGI on command line

Hi All,

I have installed mapserver 6.4.1 in a docker container based on debian
jessie (see dockerfile below)

If I run:

/usr/lib/cgi-bin/mapserv -nh
"QUERY_STRING=EXCEPTIONS=application/vnd.ogc.se_inimage&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&map=/genes-mapserver/wms_test.map&SRS=EPSG:4326&BBOX=-180,-90,180,90&FORMAT=image/png&WIDTH=1080&HEIGHT=614&STYLES=&LAYERS=satellite_mod"
> /tmp/test.png

The png is corrupt and I can not open it with neither gimp nor firefox.

However, I get valid pngs using the very same map file with shp2img or
mapserv -nh
"QUERY_STRING=map=/genes-mapserver/wms_test.map&mode=map&layers=satellite_mod
.

Find below more details (mapserver version, exact command lines I used and
resulting debug logs, map file, and docker file)

I searched google, the mailing list archives, but nothing seems to be
similar to this problem. Therefore, any help is very much appreciated :)

ciao,
renzo

* Mapserver Version:

MapServer version 6.4.1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML
SUPPORTS=PROJ SUPPORTS=GD SUPPORTS=AGG SUPPORTS=FREETYPE
SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS SUPPORTS=RSVG SUPPORTS=ICONV
SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS
INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

* Command lines

Generates valid png:

/usr/lib/cgi-bin/mapserv -nh
"QUERY_STRING=map=/genes-mapserver/wms_test.map&mode=map&layers=satellite_mod"
> /tmp/test.png

shp2img --all_debug 2 -m /genes-mapserver/wms_test.map -o /tmp/test.png

Generates invalid corrupt png:

/usr/lib/cgi-bin/mapserv -nh
"QUERY_STRING=EXCEPTIONS=application/vnd.ogc.se_inimage&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&map=/genes-mapserver/wms_test.map&SRS=EPSG:4326&BBOX=-180,-90,180,90&FORMAT=image/png&WIDTH=1080&HEIGHT=614&STYLES=&LAYERS=satellite_mod"
> /tmp/test.png

* Log file (for all three runs in that order):

[Wed May 27 08:51:44 2015].475696 CGI Request 1 on process 79
[Wed May 27 08:51:44 2015].476881 msDrawMap(): rendering using outputformat
named png (AGG/PNG).
[Wed May 27 08:51:44 2015].476916 msDrawMap(): WMS/WFS set-up and query,
0.000s
[Wed May 27 08:51:44 2015].478222 msDrawRasterLayerLow(satellite_mod):
entering.
[Wed May 27 08:51:45 2015].16608 msDrawMap(): Layer 0 (satellite_mod),
0.540s
[Wed May 27 08:51:45 2015].16665 msDrawMap(): Drawing Label Cache, 0.000s
[Wed May 27 08:51:45 2015].16677 msDrawMap() total time: 0.541s
[Wed May 27 08:51:45 2015].38545 msSaveImage(stdout) total time: 0.022s
[Wed May 27 08:51:45 2015].38838 mapserv request processing time (msLoadMap
not incl.): 0.563s

[Wed May 27 08:56:29 2015].752703 msDrawMap(): rendering using outputformat
named png (AGG/PNG).
[Wed May 27 08:56:29 2015].752820 msDrawMap(): WMS/WFS set-up and query,
0.000s
[Wed May 27 08:56:29 2015].754465 msDrawRasterLayerLow(satellite_mod):
entering.
[Wed May 27 08:56:30 2015].295590 msDrawMap(): Layer 0 (satellite_mod),
0.543s
[Wed May 27 08:56:30 2015].295664 msDrawMap(): Drawing Label Cache, 0.000s
[Wed May 27 08:56:30 2015].295684 msDrawMap() total time: 0.544s
[Wed May 27 08:56:30 2015].323794 msSaveImage(/tmp/test.png) total time:
0.028s

[Wed May 27 08:59:28 2015].995397 CGI Request 1 on process 82
[Wed May 27 08:59:28 2015].995464 msWMSLoadGetMapParams(): enabling
non-square pixels.
[Wed May 27 08:59:28 2015].996733 msDrawMap(): kicking into non-square
pixel preserving mode.
[Wed May 27 08:59:28 2015].997595 msDrawMap(): rendering using outputformat
named png (AGG/PNG).
[Wed May 27 08:59:28 2015].997614 msDrawMap(): WMS/WFS set-up and query,
0.000s
[Wed May 27 08:59:28 2015].998950 msDrawRasterLayerLow(satellite_mod):
entering.
[Wed May 27 08:59:29 2015].651061 msDrawMap(): Layer 0 (satellite_mod),
0.653s
[Wed May 27 08:59:29 2015].651143 msDrawMap(): Drawing Label Cache, 0.000s
[Wed May 27 08:59:29 2015].651167 msDrawMap() total time: 0.656s
[Wed May 27 08:59:29 2015].681373 msSaveImage(stdout) total time: 0.030s
[Wed May 27 08:59:29 2015].681769 mapserv request processing time
(msLoadMap not incl.): 0.686s

* map file

MAP
NAME "wms_test"
STATUS ON
EXTENT -180 -90 180 90
IMAGECOLOR 210 210 210
IMAGETYPE png
SIZE 1080 614
UNITS dd

CONFIG "MS_ERRORFILE" "/tmp/wms_test_error.txt"
DEBUG 2

PROJECTION
#this is WGS84
"init=epsg:4326"
END

SYMBOLSET "etc/symbols.sym"
FONTSET "etc/fonts/fonts.txt"

WEB
IMAGEPATH /tmp/
IMAGEURL "/tmp/"

ERROR "/error.html"
EMPTY "/no_result.html"

METADATA
### Enable WFS support
"wms_title"           "wms test"
"wms_onlineresource"  "http://localhost/wms?"
"wms_srs"             "EPSG:4326"
"wms_enable_request"  "GetCapabilities GetMap GetFeatureInfo
GetLegendGraphic"
"ows_enable_request"  "GetCapabilities GetMap GetFeatureInfo
GetLegendGraphic"
"ows_extent" "-180 -90 180 90"
"wfs_title"           "wfs test"
#necessary for the WMS GetFeatureInfo request
"WMS_FEATURE_INFO_MIME_TYPE" "text/html"
END

END

LEGEND
STATUS on
KEYSIZE 10 10
LABEL
SIZE 9
COLOR 0 0 0
TYPE truetype
ENCODING UTF-8
FONT sans
FORCE false
PARTIALS true
POSITION AUTO
END
TEMPLATE "template/legend.html" # HTML template file
END

LAYER
NAME satellite_mod

METADATA
"wms_title"     "World Map Lite"
"unit"          "false"
END #end of wms metadata

DATA data/satelliteMod.png
TYPE RASTER
STATUS ON
END
#map end
END

* Dockerfile

FROM debian:jessie	

ENV GMS_DIR=/genes-mapserver
ENV LANG C.UTF-8

# Update and upgrade system
RUN apt-get -qq update --fix-missing && \
apt-get install -y cgi-mapserver mapserver-bin

RUN mkdir ${GMS_DIR}

VOLUME ${GMS_DIR}

ENTRYPOINT ["/usr/lib/cgi-bin/mapserv"]

The actual tests are done within the container by:

sudo docker run -v ~/src/genes-mapserver/:/genes-mapserver --rm
--entrypoint=/bin/bash -ti renzok/mapserver-cgi 

thanks for reading :)
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