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annotate planemo/lib/python3.7/site-packages/requests_toolbelt/utils/formdata.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1 # -*- coding: utf-8 -*-
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2 """Implementation of nested form-data encoding function(s)."""
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3 from .._compat import basestring
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4 from .._compat import urlencode as _urlencode
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5
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6
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7 __all__ = ('urlencode',)
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8
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9
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10 def urlencode(query, *args, **kwargs):
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11 """Handle nested form-data queries and serialize them appropriately.
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12
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13 There are times when a website expects a nested form data query to be sent
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14 but, the standard library's urlencode function does not appropriately
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15 handle the nested structures. In that case, you need this function which
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16 will flatten the structure first and then properly encode it for you.
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17
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18 When using this to send data in the body of a request, make sure you
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19 specify the appropriate Content-Type header for the request.
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20
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21 .. code-block:: python
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22
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23 import requests
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24 from requests_toolbelt.utils import formdata
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25
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26 query = {
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27 'my_dict': {
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28 'foo': 'bar',
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29 'biz': 'baz",
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30 },
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31 'a': 'b',
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32 }
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33
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34 resp = requests.get(url, params=formdata.urlencode(query))
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35 # or
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36 resp = requests.post(
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37 url,
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38 data=formdata.urlencode(query),
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39 headers={
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40 'Content-Type': 'application/x-www-form-urlencoded'
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41 },
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42 )
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43
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44 Similarly, you can specify a list of nested tuples, e.g.,
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45
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46 .. code-block:: python
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47
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48 import requests
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49 from requests_toolbelt.utils import formdata
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50
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51 query = [
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52 ('my_list', [
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53 ('foo', 'bar'),
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54 ('biz', 'baz'),
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55 ]),
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56 ('a', 'b'),
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57 ]
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58
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59 resp = requests.get(url, params=formdata.urlencode(query))
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60 # or
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61 resp = requests.post(
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62 url,
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63 data=formdata.urlencode(query),
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64 headers={
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65 'Content-Type': 'application/x-www-form-urlencoded'
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66 },
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67 )
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68
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69 For additional parameter and return information, see the official
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70 `urlencode`_ documentation.
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71
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72 .. _urlencode:
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73 https://docs.python.org/3/library/urllib.parse.html#urllib.parse.urlencode
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74 """
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75 expand_classes = (dict, list, tuple)
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76 original_query_list = _to_kv_list(query)
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77
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78 if not all(_is_two_tuple(i) for i in original_query_list):
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79 raise ValueError("Expected query to be able to be converted to a "
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80 "list comprised of length 2 tuples.")
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81
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82 query_list = original_query_list
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83 while any(isinstance(v, expand_classes) for _, v in query_list):
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84 query_list = _expand_query_values(query_list)
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85
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86 return _urlencode(query_list, *args, **kwargs)
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87
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88
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89 def _to_kv_list(dict_or_list):
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90 if hasattr(dict_or_list, 'items'):
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91 return list(dict_or_list.items())
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92 return dict_or_list
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93
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94
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95 def _is_two_tuple(item):
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96 return isinstance(item, (list, tuple)) and len(item) == 2
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97
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98
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99 def _expand_query_values(original_query_list):
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100 query_list = []
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101 for key, value in original_query_list:
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102 if isinstance(value, basestring):
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103 query_list.append((key, value))
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104 else:
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105 key_fmt = key + '[%s]'
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106 value_list = _to_kv_list(value)
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107 query_list.extend((key_fmt % k, v) for k, v in value_list)
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108 return query_list