Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/aiohttp/formdata.py: 19%

1import io 

2import warnings 

3from typing import Any, Iterable, List, Optional 

4from urllib.parse import urlencode 

5 

6from multidict import MultiDict, MultiDictProxy 

7 

8from . import hdrs, multipart, payload 

9from .helpers import guess_filename 

10from .payload import Payload 

11 

12__all__ = ("FormData",) 

13 

14 

15class FormData: 

16 """Helper class for form body generation. 

17 

18 Supports multipart/form-data and application/x-www-form-urlencoded. 

19 """ 

20 

21 def __init__( 

22 self, 

23 fields: Iterable[Any] = (), 

24 quote_fields: bool = True, 

25 charset: Optional[str] = None, 

26 *, 

27 default_to_multipart: bool = False, 

28 ) -> None: 

29 self._writer = multipart.MultipartWriter("form-data") 

30 self._fields: List[Any] = [] 

31 self._is_multipart = default_to_multipart 

32 self._quote_fields = quote_fields 

33 self._charset = charset 

34 

35 if isinstance(fields, dict): 

36 fields = list(fields.items()) 

37 elif not isinstance(fields, (list, tuple)): 

38 fields = (fields,) 

39 self.add_fields(*fields) 

40 

41 @property 

42 def is_multipart(self) -> bool: 

43 return self._is_multipart 

44 

45 def add_field( 

46 self, 

47 name: str, 

48 value: Any, 

49 *, 

50 content_type: Optional[str] = None, 

51 filename: Optional[str] = None, 

52 content_transfer_encoding: Optional[str] = None, 

53 ) -> None: 

54 

55 if isinstance(value, io.IOBase): 

56 self._is_multipart = True 

57 elif isinstance(value, (bytes, bytearray, memoryview)): 

58 msg = ( 

59 "In v4, passing bytes will no longer create a file field. " 

60 "Please explicitly use the filename parameter or pass a BytesIO object." 

61 ) 

62 if filename is None and content_transfer_encoding is None: 

63 warnings.warn(msg, DeprecationWarning) 

64 filename = name 

65 

66 type_options: MultiDict[str] = MultiDict({"name": name}) 

67 if filename is not None and not isinstance(filename, str): 

68 raise TypeError("filename must be an instance of str. Got: %s" % filename) 

69 if filename is None and isinstance(value, io.IOBase): 

70 filename = guess_filename(value, name) 

71 if filename is not None: 

72 type_options["filename"] = filename 

73 self._is_multipart = True 

74 

75 headers = {} 

76 if content_type is not None: 

77 if not isinstance(content_type, str): 

78 raise TypeError( 

79 "content_type must be an instance of str. Got: %s" % content_type 

80 ) 

81 if "\r" in content_type or "\n" in content_type: 

82 raise ValueError( 

83 "Newline or carriage return detected in headers. " 

84 "Potential header injection attack." 

85 ) 

86 headers[hdrs.CONTENT_TYPE] = content_type 

87 self._is_multipart = True 

88 if content_transfer_encoding is not None: 

89 if not isinstance(content_transfer_encoding, str): 

90 raise TypeError( 

91 "content_transfer_encoding must be an instance" 

92 " of str. Got: %s" % content_transfer_encoding 

93 ) 

94 msg = ( 

95 "content_transfer_encoding is deprecated. " 

96 "To maintain compatibility with v4 please pass a BytesPayload." 

97 ) 

98 warnings.warn(msg, DeprecationWarning) 

99 self._is_multipart = True 

100 

101 self._fields.append((type_options, headers, value)) 

102 

103 def add_fields(self, *fields: Any) -> None: 

104 to_add = list(fields) 

105 

106 while to_add: 

107 rec = to_add.pop(0) 

108 

109 if isinstance(rec, io.IOBase): 

110 k = guess_filename(rec, "unknown") 

111 self.add_field(k, rec) # type: ignore[arg-type] 

112 

113 elif isinstance(rec, (MultiDictProxy, MultiDict)): 

114 to_add.extend(rec.items()) 

115 

116 elif isinstance(rec, (list, tuple)) and len(rec) == 2: 

117 k, fp = rec 

118 self.add_field(k, fp) 

119 

120 else: 

121 raise TypeError( 

122 "Only io.IOBase, multidict and (name, file) " 

123 "pairs allowed, use .add_field() for passing " 

124 "more complex parameters, got {!r}".format(rec) 

125 ) 

126 

127 def _gen_form_urlencoded(self) -> payload.BytesPayload: 

128 # form data (x-www-form-urlencoded) 

129 data = [] 

130 for type_options, _, value in self._fields: 

131 data.append((type_options["name"], value)) 

132 

133 charset = self._charset if self._charset is not None else "utf-8" 

134 

135 if charset == "utf-8": 

136 content_type = "application/x-www-form-urlencoded" 

137 else: 

138 content_type = "application/x-www-form-urlencoded; charset=%s" % charset 

139 

140 return payload.BytesPayload( 

141 urlencode(data, doseq=True, encoding=charset).encode(), 

142 content_type=content_type, 

143 ) 

144 

145 def _gen_form_data(self) -> multipart.MultipartWriter: 

146 """Encode a list of fields using the multipart/form-data MIME format""" 

147 for dispparams, headers, value in self._fields: 

148 try: 

149 if hdrs.CONTENT_TYPE in headers: 

150 part = payload.get_payload( 

151 value, 

152 content_type=headers[hdrs.CONTENT_TYPE], 

153 headers=headers, 

154 encoding=self._charset, 

155 ) 

156 else: 

157 part = payload.get_payload( 

158 value, headers=headers, encoding=self._charset 

159 ) 

160 except Exception as exc: 

161 raise TypeError( 

162 "Can not serialize value type: %r\n " 

163 "headers: %r\n value: %r" % (type(value), headers, value) 

164 ) from exc 

165 

166 if dispparams: 

167 part.set_content_disposition( 

168 "form-data", quote_fields=self._quote_fields, **dispparams 

169 ) 

170 # FIXME cgi.FieldStorage doesn't likes body parts with 

171 # Content-Length which were sent via chunked transfer encoding 

172 assert part.headers is not None 

173 part.headers.popall(hdrs.CONTENT_LENGTH, None) 

174 

175 self._writer.append_payload(part) 

176 

177 self._fields.clear() 

178 return self._writer 

179 

180 def __call__(self) -> Payload: 

181 if self._is_multipart: 

182 return self._gen_form_data() 

183 else: 

184 return self._gen_form_urlencoded()