Current File : //lib/python2.7/site-packages/requests_toolbelt/utils/formdata.py
# -*- coding: utf-8 -*-
"""Implementation of nested form-data encoding function(s)."""
from .._compat import basestring
from .._compat import urlencode as _urlencode
__all__ = ('urlencode',)
def urlencode(query, *args, **kwargs):
"""Handle nested form-data queries and serialize them appropriately.
There are times when a website expects a nested form data query to be sent
but, the standard library's urlencode function does not appropriately
handle the nested structures. In that case, you need this function which
will flatten the structure first and then properly encode it for you.
When using this to send data in the body of a request, make sure you
specify the appropriate Content-Type header for the request.
.. code-block:: python
import requests
from requests_toolbelt.utils import formdata
query = {
'my_dict': {
'foo': 'bar',
'biz': 'baz",
},
'a': 'b',
}
resp = requests.get(url, params=formdata.urlencode(query))
# or
resp = requests.post(
url,
data=formdata.urlencode(query),
headers={
'Content-Type': 'application/x-www-form-urlencoded'
},
)
Similarly, you can specify a list of nested tuples, e.g.,
.. code-block:: python
import requests
from requests_toolbelt.utils import formdata
query = [
('my_list', [
('foo', 'bar'),
('biz', 'baz'),
]),
('a', 'b'),
]
resp = requests.get(url, params=formdata.urlencode(query))
# or
resp = requests.post(
url,
data=formdata.urlencode(query),
headers={
'Content-Type': 'application/x-www-form-urlencoded'
},
)
For additional parameter and return information, see the official
`urlencode`_ documentation.
.. _urlencode:
https://docs.python.org/3/library/urllib.parse.html#urllib.parse.urlencode
"""
expand_classes = (dict, list, tuple)
original_query_list = _to_kv_list(query)
if not all(_is_two_tuple(i) for i in original_query_list):
raise ValueError("Expected query to be able to be converted to a "
"list comprised of length 2 tuples.")
query_list = original_query_list
while any(isinstance(v, expand_classes) for _, v in query_list):
query_list = _expand_query_values(query_list)
return _urlencode(query_list, *args, **kwargs)
def _to_kv_list(dict_or_list):
if hasattr(dict_or_list, 'items'):
return list(dict_or_list.items())
return dict_or_list
def _is_two_tuple(item):
return isinstance(item, (list, tuple)) and len(item) == 2
def _expand_query_values(original_query_list):
query_list = []
for key, value in original_query_list:
if isinstance(value, basestring):
query_list.append((key, value))
else:
key_fmt = key + '[%s]'
value_list = _to_kv_list(value)
query_list.extend((key_fmt % k, v) for k, v in value_list)
return query_list
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