OpenEuphoria

Re: foreach routine

• Posted by duke normandin <dnormandin at bsdrocksperlrolls.com> Dec 23, 2006
• 645 views

Derek Parnell wrote:
> 
> duke normandin wrote:
> > 
> > Chris Bensler wrote:
> > > The getenv() routine will return -1 if the environment variable
> > > CONTENT_LENGTH
> > > doesn't exist. If it does exist, a string will be returned.
> > 
> > Are you sure? I've never proven this to myself, but it has always been my
> > understanding that with respect the method=POST, the ENV. VAR.
> > CONTENT_LENGTH
> > would be set to the amount of bytes sent out. THEREFORE, this is why we
> > "read"
> > that many bytes from STDIN, and only that many. So my point is that
> > CONTENT_LENGTH
> > will in one case be a positive number or a -1 -- both atoms. No?
> 
> Yes and no. The Euphoria function getenv() always returns a string if the
> environment
> variable exists, and -1 if it doesn't exist. In your case, CONTENT_LENGTH will
> most likely always be there due to the CGI environment, but when getenv()
> returns
> its content, it is a string representation of a number and not the number
> itself.
> So if the number of characters to read in from STDIN is 59,
> getenv("CONTENT_LENGTH")
> will return "59" and not 59. Thus you have to convert the string "59" to its
> number form. 

I got it! Damn! I've got to watch the data types more carefully. Not used to it.
;)
To recap, getenv returns the atom -1 if the ENV.VAR. is unset OR a string
containing
whatever. In the case of CONTENT_LENGTH I was expecting an integer. I now know
to
convert CONTENT_LENGTH *to* an integer.

>   res = value( "59" )

[snip]

I really don't need to do all that testing.

What the Perl/PHP etc world has done all this time is:

1. getenv("REQUEST_METHOD")
2. if == "POST"
   2.a value_array = value(getenv("CONTENT_LENGTH")
   2.b stash get_bytes(0, value_array[2])
3. if == "GET"
   3.a stash getenv("QUERY_STRING")
4. if == "some_bogus_method"
   4.a cgi_die("gracefully")
5. amen

That is what I want to reproduce in Euphoria come "hell or high water" ;)

Once I have the above "stash", then we use your "foreach" and "split" code to
massage the FORM[key]=values
I love it !! Thanks you all for the mini EU tutorials!!
--
duke