Building Your Web Site

1
Building Your Web Site

• ATS 315

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Your Project

• Make a web site that shows plots that YOU
  generated!
• Plots should regenerate every hour!

3
Step 1 Decide what plots you want to show

• Pick out a couple of charts that can be made with
  the programs we have written this semester.
• Dont go nutsmaybe 4 or 5 plots at most!

4
Step 2 Make special versions of your programs
with NO interaction!

• Your programs shouldnt require anyone to choose
  a variable, domain, contour interval or anything
  like that.
• Each program should produce ONE chart!

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Step 3 Modify these programs so that they
produce an XWD file

• XWD XWindow Dump
• a file format for images, similar to GIF
• Well learn how to do this later.

6
Step 4 Create a script that runs these
programs.

• scripts little programs that perform unix
  commands.
• Well learn more about this later.

7
Step 5 Set up a crontab that runs your
script each hour

• crontabs are scripts that execute on a schedule.
• Well learn more about this later.

8
Step 6 Make an HTML page to display your output

• You already know how to do this!

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The Steps

• Decide what youll show
• Versions w/o interaction
• Produce XWD files
• Set up scripts
• Set up crontabs
• Write HTML code

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Step 3 Produce XWD files of your maps

• /export/home/schragej/X/xwdjms
• a special version of a standard unix program
  xwd
• captures a graphics window and saves it as a .xwd
  file
• no beeping!
• xwdjms name myplot

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Step 3 Produce XWD files of your maps

• /export/home/schragej/X/xwdjms
• a special version of a standard unix program
  xwd
• captures a graphics window and saves it as a .xwd
  file
• no beeping!
• xwdjms name myplot

The name of the graphics window that you
opened! Dont use any spaces!
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Step 3 Produce XWD files of your maps

• xwdjms uses printf to dump everything it does
  to the screen.
• You need to capture this to a file!
• xwdjms name myplot gt image.xwd

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Step 3 Produce XWD files of your maps

• xwdjms is a UNIX command, not a C command!
• system( )

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Step 3 Produce XWD files of your maps

• xwdjms is a UNIX command, not a C command!
• system( )
• Example
• system(rm .dat)

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Step 3 Produce XWD files of your maps

• system(/export/home/schragej/X/xwdjms name
  myplot gt image.xwd)

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Step 3 Produce XWD files of your maps

• system(/export/home/schragej/X/xwdjms name
  myplot gt image.xwd)
• Also, turn off the ghold!!!!!!!!

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Step 3 Produce XWD files of your maps

• system(/export/home/schragej/X/xwdjms name
  myplot gt image.xwd)
• Also, turn off the ghold!!!!!!!!
• Still more problems

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Step 3 Produce XWD files of your maps

• Draw the map
• Draw the data
• system(xwdjms)
• Even though youve given the orders to draw all
  the lines and all the data, the graphics might
  not keep up

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Step 3 Produce XWD files of your maps

• Draw the map
• Draw the data
• system(xwdjms)
• when you call xwdjms, its possible/likely that
  the picture isnt done yet!
• Youll capture a partial image!

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Step 3 Produce XWD files of your maps

• Draw the map
• Draw the data
• XFlush(display)
• system(xwdjms)
• You need to XFlush the display.

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Step 3 Produce XWD files of your maps

• Draw the map
• Draw the data
• XFlush(display)
• system(xwdjms)
• You need to XFlush the display.

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Step 3 Produce XWD files of your maps

• Draw the map
• Draw the data
• XFlush(display)
• system(xwdjms)
• Display display
• display gget_xdisplay()

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Step 3 Produce XWD files of your maps

• Display display
• display gget_xdisplay()
• Draw the map
• Draw the data
• XFlush(display)
• system(xwdjms)

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The Steps

• Decide what youll show
• Versions w/o interaction
• Produce XWD files
• Set up scripts
• Set up crontabs
• Write HTML code

25
Step 4 Create a script that runs these
programs.

• scripts little programs that perform unix
  commands.
• An example of a script

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Step 4 Create a script that runs these
programs.

• An example of a script

! /bin/csh f rm .gif mv sample.data my.data
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Step 4 Create a script that runs these
programs.

• All scripts start with pound bang space slash
  bin slash sea ess aich space minus eff

! /bin/csh f rm .gif mv sample.data my.data
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Step 4 Create a script that runs these
programs.

• Everything after that just runs as if you typed
  it at the keyboard in Unix.

! /bin/csh f rm .gif mv sample.data my.data
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Step 4 Create a script that runs these
programs.

• Everything after that just runs as if you typed
  it at the keyboard in Unix.

! /bin/csh f setenv DISPLAY wx-sun10. rm
.xwd MakeTempContours /opt/sfw/bin/convert
image.xwd temperature.gif mv temperature.gif
public_html
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Step 4 Create a script that runs these
programs.

• Change the execution privileges on your script
• chmod ax MyScript
• Test it.

31
The Steps

• Decide what youll show
• Versions w/o interaction
• Produce XWD files
• Set up scripts
• Set up crontabs
• Write HTML code

32
Step 5 Set up a crontab that runs your
script each hour

• crontabs are scripts that execute on a schedule.
• To edit a crontab, you need to have set the
  EDITOR variable to your favorite editor
• setenv EDITOR vi
• setenv EDITOR pico

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Step 5 Set up a crontab that runs your
script each hour

• start editing
• crontab e
• Every line of the crontab schedules one task to
  be run repeatedly.
• There are 6 entries on every line

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Step 5 Set up a crontab that runs your
script each hour

• The first entry is the MINUTE of each hour during
  which to run your job.

Adams 1
Affelt
Augustyn 2
Campbell 3
Craft 4
Dea 5
Fontaine 6
Franks 7
Hollibaugh 8
Hyda 9
Karr 10
Malone 11
Novella 12
Robinson 13
Selin 14
Smoliak 15
Taylor 16
Wilson 17
15 /export/home/schragej/MyScript
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Step 5 Set up a crontab that runs your
script each hour

• Entries 2, 3, 4, and 5 are the hour, day, day of
  week and day of month on which to run the job.
• A star means every.

15 /export/home/schragej/MyScript
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Step 5 Set up a crontab that runs your
script each hour

• The sixth entry is the name of your script, with
  the full path name!
• If your script prints ANYTHING to the screen,
  youll need to include
• gt /dev/null
• or the output will be emailed to you!

15 /export/home/schragej/MyScript
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The Steps

• Decide what youll show
• Versions w/o interaction
• Produce XWD files
• Set up scripts
• Set up crontabs
• Write HTML code

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Your (Last!) Assignment

• Impress me with a web site with weather charts
  that refresh hourly!