> parameters = urllib.urlencode
> ({"id":"%s","origin":"%s","dest":"%s","class1":"85",
"weight1":"185","custdata":"%s","respickup":"","resdel":"%s",
"insidechrg":"","furnchrg":"","cod":""})%(id,origin,dest,custdata,resdel)
Hi Doug,
On closer look, I think there's a misunderstanding here.
According to the documentation on urllib.urlencode():
urlencode(query[, doseq])
Convert a mapping object or a sequence of two-element tuples to a
``url-encoded'' string, suitable to pass to urlopen() above as the
optional data argument.
For example:
####################################
>>> urllib.urlencode({'Hot' : '1',
... 'Cross' : '2',
... 'Buns' : '3'})
'Hot=1&Buns=3&Cross=2'
####################################
Here, we're passing a string of key/value pairs.
Alternatively, we can pass:
####################################
>>> urllib.urlencode([('Hot', 1),
... ('Cross', '2'),
... ('Buns', '3')])
'Hot=1&Cross=2&Buns=3'
####################################
I'm not quite sure I see where the string interpolation comes in.
Wait... ok, now I understand what you're trying to do, looking back on
what you tried:
##########################################################################
parameters = (urllib.urlencode({"id":"%s","origin":"%s","dest":"%s", ...})
% (id,origin,dest, ...))
##########################################################################
You're using urlencode to build a template string, which is then passed
into urlencode.
Don't do this. *grin*
You're missing the whole point behind urlencode(): it's meant to protect
both key and values so that their string content is clean. Concretely: we
know that parameter values aren't allowed to have things like ampersands,
or else those ampersands will be misinterpreted.
We use urlencode() to encode those values properly. Rather than:
##################################################
>>> urllib.urlencode({'fish': '%s'}) % 'surf&turf'
'fish= surf&turf'
##################################################
which gives the wrong result, it is more correct to do:
###########################################
>>> urllib.urlencode({'fish': 'surf&turf'})
'fish=surf%26turf'
###########################################
So, again: when we're building those URL strings, doing the interpolation
outside of the urlencode produces incorrectly protected URL strings. Go
the direct route, and pass values to urlencode() too.
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