diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/aiohttp/formdata.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/aiohttp/formdata.py | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/aiohttp/formdata.py b/.venv/lib/python3.12/site-packages/aiohttp/formdata.py new file mode 100644 index 00000000..73056f4b --- /dev/null +++ b/.venv/lib/python3.12/site-packages/aiohttp/formdata.py @@ -0,0 +1,182 @@ +import io +import warnings +from typing import Any, Iterable, List, Optional +from urllib.parse import urlencode + +from multidict import MultiDict, MultiDictProxy + +from . import hdrs, multipart, payload +from .helpers import guess_filename +from .payload import Payload + +__all__ = ("FormData",) + + +class FormData: + """Helper class for form body generation. + + Supports multipart/form-data and application/x-www-form-urlencoded. + """ + + def __init__( + self, + fields: Iterable[Any] = (), + quote_fields: bool = True, + charset: Optional[str] = None, + *, + default_to_multipart: bool = False, + ) -> None: + self._writer = multipart.MultipartWriter("form-data") + self._fields: List[Any] = [] + self._is_multipart = default_to_multipart + self._is_processed = False + self._quote_fields = quote_fields + self._charset = charset + + if isinstance(fields, dict): + fields = list(fields.items()) + elif not isinstance(fields, (list, tuple)): + fields = (fields,) + self.add_fields(*fields) + + @property + def is_multipart(self) -> bool: + return self._is_multipart + + def add_field( + self, + name: str, + value: Any, + *, + content_type: Optional[str] = None, + filename: Optional[str] = None, + content_transfer_encoding: Optional[str] = None, + ) -> None: + + if isinstance(value, io.IOBase): + self._is_multipart = True + elif isinstance(value, (bytes, bytearray, memoryview)): + msg = ( + "In v4, passing bytes will no longer create a file field. " + "Please explicitly use the filename parameter or pass a BytesIO object." + ) + if filename is None and content_transfer_encoding is None: + warnings.warn(msg, DeprecationWarning) + filename = name + + type_options: MultiDict[str] = MultiDict({"name": name}) + if filename is not None and not isinstance(filename, str): + raise TypeError("filename must be an instance of str. Got: %s" % filename) + if filename is None and isinstance(value, io.IOBase): + filename = guess_filename(value, name) + if filename is not None: + type_options["filename"] = filename + self._is_multipart = True + + headers = {} + if content_type is not None: + if not isinstance(content_type, str): + raise TypeError( + "content_type must be an instance of str. Got: %s" % content_type + ) + headers[hdrs.CONTENT_TYPE] = content_type + self._is_multipart = True + if content_transfer_encoding is not None: + if not isinstance(content_transfer_encoding, str): + raise TypeError( + "content_transfer_encoding must be an instance" + " of str. Got: %s" % content_transfer_encoding + ) + msg = ( + "content_transfer_encoding is deprecated. " + "To maintain compatibility with v4 please pass a BytesPayload." + ) + warnings.warn(msg, DeprecationWarning) + self._is_multipart = True + + self._fields.append((type_options, headers, value)) + + def add_fields(self, *fields: Any) -> None: + to_add = list(fields) + + while to_add: + rec = to_add.pop(0) + + if isinstance(rec, io.IOBase): + k = guess_filename(rec, "unknown") + self.add_field(k, rec) # type: ignore[arg-type] + + elif isinstance(rec, (MultiDictProxy, MultiDict)): + to_add.extend(rec.items()) + + elif isinstance(rec, (list, tuple)) and len(rec) == 2: + k, fp = rec + self.add_field(k, fp) # type: ignore[arg-type] + + else: + raise TypeError( + "Only io.IOBase, multidict and (name, file) " + "pairs allowed, use .add_field() for passing " + "more complex parameters, got {!r}".format(rec) + ) + + def _gen_form_urlencoded(self) -> payload.BytesPayload: + # form data (x-www-form-urlencoded) + data = [] + for type_options, _, value in self._fields: + data.append((type_options["name"], value)) + + charset = self._charset if self._charset is not None else "utf-8" + + if charset == "utf-8": + content_type = "application/x-www-form-urlencoded" + else: + content_type = "application/x-www-form-urlencoded; charset=%s" % charset + + return payload.BytesPayload( + urlencode(data, doseq=True, encoding=charset).encode(), + content_type=content_type, + ) + + def _gen_form_data(self) -> multipart.MultipartWriter: + """Encode a list of fields using the multipart/form-data MIME format""" + if self._is_processed: + raise RuntimeError("Form data has been processed already") + for dispparams, headers, value in self._fields: + try: + if hdrs.CONTENT_TYPE in headers: + part = payload.get_payload( + value, + content_type=headers[hdrs.CONTENT_TYPE], + headers=headers, + encoding=self._charset, + ) + else: + part = payload.get_payload( + value, headers=headers, encoding=self._charset + ) + except Exception as exc: + raise TypeError( + "Can not serialize value type: %r\n " + "headers: %r\n value: %r" % (type(value), headers, value) + ) from exc + + if dispparams: + part.set_content_disposition( + "form-data", quote_fields=self._quote_fields, **dispparams + ) + # FIXME cgi.FieldStorage doesn't likes body parts with + # Content-Length which were sent via chunked transfer encoding + assert part.headers is not None + part.headers.popall(hdrs.CONTENT_LENGTH, None) + + self._writer.append_payload(part) + + self._is_processed = True + return self._writer + + def __call__(self) -> Payload: + if self._is_multipart: + return self._gen_form_data() + else: + return self._gen_form_urlencoded() |