In python CGI, how to pass "hello" back to a javascript function asan argument at client side?

10-13-09, 12:31 AM

zxo102

Hi everyone,
How can I pass a string generated from python cgi at server side
to a
javascript function as an argument at client side?

Here is my case:

1. client side:
"load" is a javascript function in a html page. It starts the
python CGI "test.py" via Apache:
<html>
<script language="javascript">
....
load("test.py" );
....
</script>
....
</html>

I want test.py to "return" a "hello" back so the javascript function
load takes "hello" as argument like load("hello").

2. server side: test.py
....
#!c:\python24\python.exe

def main():
message = 'hello'
#return message

main()
....

Any ideas?

Thanks in advance for your help.

ouyang

10-13-09, 09:52 AM

Bruno Desthuilliers

zxo102 a écrit :
> Hi everyone,
> How can I pass a string generated from python cgi at server side
> to a
> javascript function as an argument at client side?
>

This is common HTTP / javascriot stuff - nothing related to Python.
First learn about the HTTP protocol - something you obviously need if
doing web development -, then eventually google for XMLHttpRequest (or
'ajax').

To make a long story short: the client side doesn't give a damn about
how the server-side works - it requests an url (-> read the part about
"HTTP Request" in the rfc), waits for the response (-> read the part
about "HTTP Response" in the rfc), and whatever it wants with the
response. FWIW, HTTP requests can have a "query string" containing
arguments.

From the server-side POV, your CGI script doesn't "return" anything -
it generates a HTTP response, which will be sent back to the client by
Apache.

10-13-09, 10:05 AM

Piet van Oostrum

>>>>> zxo102 <zxo102> (z) wrote:

>z> Hi everyone,
>z> How can I pass a string generated from python cgi at server side
>z> to a
>z> javascript function as an argument at client side?

>z> I want test.py to "return" a "hello" back so the javascript function
>z> load takes "hello" as argument like load("hello").

>z> 2. server side: test.py
>z> ...
>z> #!c:\python24\python.exe

>z> def main():
>z> message = 'hello'
>z> #return message

>z> main()
>z> ...

>z> Any ideas?

CGI scripts return stuff by printing it, or more generally writing to
stdout.

So print message should do. The rest is not a Python question but a
Javascript question.

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