Google App Engine - Request class query_string

Question

In Python and GAE, I would like to ask how to get the parameters of a query string in the url. As I know, the query_string part returns all the part after the "?" in the url. So what I have to do is to split the query string with "&", and use the variables. Is there any other convinient way to manage the query string? How do you normally do it?

str_query = self.request.query_string
m = str_query.split('&')
a = m[0] 
b = m[1]
c = m[2]

Doing this way, in case, the query_string does not have any values, it threw an error:

IndexError: list index out of range

rogeriopvl · Accepted Answer · 2009-09-07 21:41:06Z

18

You don't need to complicate. You can retrieve all GET parameters with:

self.request.get('var_name')

Or if you want to retrieve them all in one list you can use:

self.request.get_all()

You can find more info on the Request class here.

edited Sep 7, 2009 at 21:41

answered Sep 7, 2009 at 21:34

rogeriopvl

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2 Comments

apenwarr Over a year ago

self.request.get_all() doesn't actually work without a parameter; it doesn't return all the query variables, it just returns all the values of a particular variable. For the complete list you need to use self.request.arguments().

marianosimone Over a year ago

As @apenwarr says, this is no longer a valid answer: get_all needs a parameter name to get all values for

marianosimone · Accepted Answer · 2015-02-27 15:10:26Z

0

If you want to iterate over all the parameters of your request, you should do something like this:

for argument in self.request.arguments():
    values = self.request.get_all(argument)
    # do something with values (which is a list)

Or, you could build your own dict containing all the data:

params = {arg: self.request.get_all(arg) for arg in self.request.arguments()}

answered Feb 27, 2015 at 15:10

marianosimone

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