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20030922: how to display loop of images in a webpage

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  • Subject: 20030922: how to display loop of images in a webpage
  • Date: Fri, 26 Sep 2003 11:57:47 -0600
>From: sridhar duggireddy <address@hidden>
>Organization: USF
>Keywords: 200309221908.h8MJ8Yk1002673 McIDAS GIF web page display

Hi Sridhar,

I am sorry it took so long for me to get to your question, but this
week has been overly hectic.

>I have a small question. I am from University of South Florida and
>working under Dr. Arlene Laing.

My memory isn't that bad yet :-)

>I am trying to display loop of images using AniS.class java
>applet. I had written that applet code in my shell script. But it is not
>working.

Can you explain exactly what is not working?  Also, can you remind me
of the URL for your web page (I seem to remember http://metlab.cas.usf.edu)?
Thanks.

>As u know my shell scripts are in cgi-bin file. When I tried to
>display the same applet in another html page which is not in this
>directory it is working. What might be the problem?

I will have to understand more of exactly what is not working before I can
respond.

>I am sending the code also. Please see it..

The way that the site mcdemo.unidata.ucar.edu uses the AniS.class applet
is:

-- index.html -- 

 ...

<h3>Imagery</h3>
<ul>
<li><a href=images/GETOPO.GIF>Latest GOES-East Infrared/Topography Composite 
image</a>
    <ul>
    <li><a href=images/GEFRONT.GIF>Same image overlain with fronts</a>
    <li><a href=getopoloop.html>Loop of GOES-East IR/Topography images</a> 
(Javaapplet)
    <li><a href=images/GE-IR.TXT>McIDAS BATCH file used to generate these 
images </a><p>
    </ul>
<li><a href=images/GOESWIR.GIF>Latest GOES-West Infrared/Topography Composite 
image</a>
    <ul>
    <li><a href=images/GWFRONT.GIF>Same image overlain with fronts</a>
    <li><a href=images/GW-IR.TXT>McIDAS BATCH file used to generate this 
image</a><p>
    </ul>
<li>GOES-East/West Composites
 ...

So, the page has a line that has a hyperlink to an html file that runs the
applet:

<li><a href=getopoloop.html>Loop of GOES-East IR/Topography images</a>

which points to another getopoloop.html, and it consists of:

<HTML>
<HEAD>
<TITLE> GOES-East IR/TOPO Composite Image Loop </TITLE>
</HEAD>
<BODY>
<CENTER>
<h2> GOES-East IR/TOPO Composite Image Loop </h2>
</CENTER>
<APPLET code="AniS.class" width=640 height=570>
<PARAM name="basename" value="images/getopo">
<PARAM name="controls" value="startstop, step, speed, refresh, toggle">
<PARAM name="num_frames" value="10">
<strong> You need a Java-enabled browser to view this applet </strong>
</APPLET>
</BODY>
</HTML>

The images from the loop that this applet is loading are all contained
in a subdirectory 'images/getopo'.

I think that you are attempting to do more-or-less the same thing in
your CGI script, but I know more if I looked at the results of the
CGI (so I need the URL).

>Thanks,
>Sridhar.

------------- regional_loop1.cgi -------------

#!/bin/sh 
set -f

# This is the shell script used to generate the loop of Regional Images.

cd /usr/local/apps/php-apache/cgi-bin
CAT=/bin/cat

echo "Content-type:text/html"
echo "Pragma:no-cache"
echo ""

PATH=/bin:/usr/local/sbin:/sbin:/usr/sbin:/usr/bin:/usr/bin/X11:/usr/local/bin:/usr/bin:/usr/X11R6/bin:/root/bin:/usr/local/apps/php-apache/cgi-bin:.
export PATH

exec 2>> /dev/null

if [  -x $CAT  ]; then

$CAT << BOT

<title> USF McIDAS Regional Images</title>
<body><br>
<center><img src="/sridhara/deptlogo1.gif"></center>
<a href="http://metlab.cas.usf.edu/sridhara/regional.php";>Back</a>
<center><h2>Regional Images</h2></center>

 
BOT
  
  # call another shell script here.
  echo \<pre\>
  /usr/local/apps/php-apache/cgi-bin/regional_loop1.csh $QUERY_STRING   
  echo \<pre\>
       http://metlab.cas.usf.edu/sridhara/mcidas/gifs/applet.html
else 
  echo cannot find cat on this system.
  exit

fi
$CAT << EOT
<center>
<APPLET archive="/sridhara/mcidas/gifs/aniscode.zip" 
code="/sridhara/mcidas/gifs/AniS.class" width=500 
height=500>
<PARAM name="controls" value="startstop,firstlast,speed,step,looprock">
<PARAM name="filenames" 
value="reg_frame1.gif,reg_frame2.gif,reg_frame3.gif,reg_frame4.gif">
</APPLET>
<a href="/sridhara/mcidas/gifs/applet.html">Click 
here to view the loop</a>
</center>
</pre>
</BODY>

EOT

------------- regional_loop1.cgi -------------

------------- regional_loop1.csh -------------

#!/bin/csh -f

#------------------------------------------------------------------------------
#
# Name:    regional_loop.csh
#
# Purpose: This script generates satellite images of GINI satellite data
#          using McIDAS
#
# Usage:   regional_loop.csh args
#
#------------------------------------------------------------------------------

#
# Environment variables needed to run McIDAS
#

#echo Content-type:text/html
setenv WEBHOME /usr/local/apps/php-apache/htdocs
setenv HOME    $WEBHOME/sridhara/mcidas
setenv MYDATA  $HOME/data
setenv MYBIN   $HOME/bin
setenv MYGIFS  $HOME/gifs

setenv MCHOME /home/mcidas
setenv MCDATA $MCHOME/data
setenv MCHELP $MCHOME/help
setenv MCPATH ${MYDATA}:${MCDATA}:${MCHELP}
setenv MCBIN  $MCHOME/bin
setenv MCTABLE_WRITE $MYDATA/MCTABLE.TXT
setenv MCTABLE_READ "$MCTABLE_WRITE;$MCDATA/ADDESITE.TXT"

cd $MYDATA

#
# Now, the PATH
#
setenv PATH 
${MCBIN}:/usr/bin:/etc:/usr/sbin:/usr/ucb:/bin:/usr/X11R6/bin:/sbin:/usr/local/bin

#
# Protect our resources
#
limit cputime 30

#
# Split apart command line parameters
#

#echo $1 was passed to gen_mcidas_sat

#
# ADDE dataset group/descriptor
#
set type=`echo $1 | cut -f1 -d"&" | cut -f2 -d"=" | sed 's/%2F/\//'`
set test=`echo $type | grep WV`
if ( "$test" == "" ) then
     set enh="EU=IMAGE"
else
   set enh="EU=H20"
endif

set test=`echo $type | grep VIS`
if ( "$test" == "" ) then
  set test=`echo $type | grep WV`
  if ( "$test" == "" ) then
      set str="SU=IRTEMP"
  else
     set str="SU=H20TEMP"
  endif
else
   set str="SU=X"
endif

# If the type is florida
if ( "$type" == "GINIEAST/GE1KVIS" ) then
     set ident="STATION=TBW"
     set mag="MAG=-2 -2"
     set file="FILE=OUTLUSAM"
endif
                                                                                
#If the type is Continental US
if ( "$type" == "GINICOMP/GSN8KVIS" ) then
      set ident="LINELE=600 850"
      set mag="MAG=-1 -1"
      set file="VH"
endif

#If the type is Caribbean visible
if ( "$type" == "RTIMAGES/GE-VIS" ) then
      set ident="LINELE=820 830"
      set mag="MAG=-1 -1"
      set file="FILE=OUTLUSAM"
endif
                                                                                
#If the type is North America Visible
if ( "$type" == "NAGINICOMP/GSN8KVIS" ) then
      set type="GINICOMP/GSN8KVIS"
      set ident="LINELE=504 768"
      set mag="MAG=-2 -2"
      set file="FILE=OUTLHRES"
endif

set geom="480x640"

# call another shell script here.

mcenv -g 32 -i 128 -f 10 $MYBIN/regional_loop "$type.0" "$ident" "$mag" "$file" 
$str > /dev/null

#  
# server which file to load
#
# NB: the on-the-fly generated web page's HOME directory is
#     /usr/local/apps/php-apache/htdocs
#


#echo "<center>"
#echo "<APPLET 
#archive="/home/webadmin/htdocs/sridhara/mcidas/gifs/aniscode.zip" 
#code="/home/webadmin/htdocs/sridhara/mcidas/gifs/AniS.class" 

#codebase="/home/webadmin/htdocs/sridhara/mcidas/gifs/" width=500 
#height=500>"
#echo "<PARAM name="controls" value="startstop,fitstlast">"
#echo "<PARAM name="filenames" 
#value="reg_frame1.gif,reg_frame2.gif,reg_frame3.gif">"
#echo "</APPLET>"
#echo "</center>"

exit

------------- regional_loop1.csh -------------

Tom