hi all,

I have tried a python code that creates simulation or graphic. The code runs fine in the executable mode .py. Now, I want to show it in a web page using cgi. I tried the following
==========================
#!/usr/bin/python

print "Content-Type:application/octet-stream\n\n"

# python code here that create simulation or graphic
====================================
When I try using the web browser, the page only show a message
visual-2003-10-25

There is no simulation or graphic. I will be happy if there are any suggestion about this problem. Is it poblem in the header or something else ?

Here's some probing questions (and my assumptions):
Which web server do you use? [Apache]
How is python made available? [mod_python]
Is there a problem in showing us the code? [no]
Is there a problem in showing us a minimal script that generates the same kind of output? [no]
Is there a problem in showing us the full code output(*)? [no]
Which browsers have you tested the script in? [firefox only]

This is kinda' like asking why your square block won't fit into your hole without saying whether the hole is square, round or triangular. What kind of data does the code produce?

read http://www.catb.org/~esr/faqs/smart-questions.html

hth --Jonas

here is the pyhton code
===================================
#!/usr/bin/python

from visual import *
from time import clock

# Coriolis simulation
g=10
lat=10
speed=80
angle=45
omega=0.05
distance=600
win=500

angle = (angle/360.)*2*pi
lat = (lat/360.)*2*pi
velocity = vector(0, speed * sin(angle), -speed * cos(angle))
L = distance + 50

scene = display(title="Coriolis Force on a projectile", width=win, height=win,
range=L, forward=(-1,-1,-1))
# Add the axis
xaxis = curve(pos=[(0,0,0), (L,0,0)], color=(1.5,0.5,0.5))
yaxis = curve(pos=[(0,0,0), (0,L,0)], color=(0.5,1.5,0.5))
zaxis = curve(pos=[(0,0,0), (0,0,L)], color=(0.5,0.5,0.5))

# Ground
mybox = box(pos=(0,0,0), length=distance+100, height=1, width=distance+100, color=color.green)

target = sphere(pos=(0,0,0), radius=10, color=color.red)
ball = sphere(pos=(0,0,distance), radius=10, color=color.blue)
ball.trail = curve(pos=[ball.pos], color=color.yellow, radius=1)
ball.velocity = velocity

# Reset
t = 0
while 1:
rate(200)

t = t + 0.005
ball.pos.x = (1/3.) * omega * g * pow(t,3) * cos(lat) - (omega * speed * pow(t,2) * (cos(lat)-sin(lat)))/sqrt(2)

ball.pos.y = (speed * t)/sqrt(2) - 0.5 * g * pow(t,2)
ball.pos.z = distance + (-speed * t)/sqrt(2)
ball.trail.append(pos=ball.pos)

if (ball.y <= 0):
#print "Landed at (%f, %f, %f)" % (ball.pos.x, ball.pos.y, ball.pos.z)
info1=label(pos=(-300,-400,-100))
info1.text="Landed at (%f, %f, %f)" % (ball.pos.x, ball.pos.y, ball.pos.z)
break # Stop this loop so the program can exit
========================================================
you can try the code. I want to show the simulation in a web. Is it possible ?
A friend suggested to change the DefaultType at httpd.conf from text/plain to application/octet-stream. Unfortunately, it still doesn't wotk.

Illegible.

Could you please post the code again, this time using *code* tags around the code?

As a rule of thumb: if you expect anything to be in a fixed-width font when you read it, put it in code tags. Python scripts, shell commands (save for the really short single lines), C, config or log files, ...

Did I guess correctly regarding Apache (looks like it, but one can never know), mod_python and firefox?

--Jonas

I tried to tag, but submit reply button returns them to the first column.
I will use <tag> to indicate that it is being "tag" and <tag><tag> indicates 2 "tag". I use apache 2. For web browesr,
I use mozilla
===================================
#!/usr/bin/python

from visual import *
from time import clock

# Coriolis simulation
g=10
lat=10
speed=80
angle=45
omega=0.05
distance=600
win=500

angle = (angle/360.)*2*pi
lat = (lat/360.)*2*pi
velocity = vector(0, speed * sin(angle), -speed * cos(angle))
L = distance + 50

scene = display(title="Coriolis Force on a projectile", width=win, height=win,range=L, forward=(-1,-1,-1))
# Add the axis
xaxis = curve(pos=[(0,0,0), (L,0,0)], color=(1.5,0.5,0.5))
yaxis = curve(pos=[(0,0,0), (0,L,0)], color=(0.5,1.5,0.5))
zaxis = curve(pos=[(0,0,0), (0,0,L)], color=(0.5,0.5,0.5))

# Ground
mybox = box(pos=(0,0,0), length=distance+100, height=1, width=distance+100, color=color.green)

target = sphere(pos=(0,0,0), radius=10, color=color.red)
ball = sphere(pos=(0,0,distance), radius=10, color=color.blue)
ball.trail = curve(pos=[ball.pos], color=color.yellow, radius=1)
ball.velocity = velocity

# Reset
t = 0
while 1:
<tag> rate(200)

<tag> t = t + 0.005
<tag> ball.pos.x = (1/3.) * omega * g * pow(t,3) * cos(lat) - (omega * speed * pow(t,2) * (cos(lat)-sin(lat)))/sqrt(2)

<tag> ball.pos.y = (speed * t)/sqrt(2) - 0.5 * g * pow(t,2)
<tag> ball.pos.z = distance + (-speed * t)/sqrt(2)
<tag> ball.trail.append(pos=ball.pos)

<tag> if (ball.y <= 0):
<tag><tag> #print "Landed at (%f, %f, %f)" % (ball.pos.x, ball.pos.y, ball.pos.z)
<tag> <tag> info1=label(pos=(-300,-400,-100))
<tag> <tag> info1.text="Landed at (%f, %f, %f)" % (ball.pos.x, ball.pos.y, ball.pos.z)
<tag> <tag> break # Stop this loop so the program can exit
=======================================
you should have visual module installed

Hi,

What jonas means is to put [ code ] before your program and [ /code ] after it. Here I've also put spaces between the brackets and the word code, to make them appear. Just remove them and it will work.

Also, I tried to run your code, but I think I don't have the module "visual".