Cannot control field order with multipart form data

[dsinghvi]

When sending a multipart file upload, it looks like httpx sends all the data fields before sending the files.

httpx/httpx/_multipart.py

Lines 211 to 223 in daec2bd

	def _iter_fields(
	self, data: RequestData, files: RequestFiles
	) -> typing.Iterator[typing.Union[FileField, DataField]]:
	for name, value in data.items():
	if isinstance(value, (tuple, list)):
	for item in value:
	yield DataField(name=name, value=item)
	else:
	yield DataField(name=name, value=value)
	file_items = files.items() if isinstance(files, typing.Mapping) else files
	for name, value in file_items:
	yield FileField(name=name, value=value)

Since order is important when decoding on the server-side, how would you make the request if you wanted to send some data fields, then a file, and then some more data fields?

In aiohttp, the user gets more granular control when building up a multipart file upload request:

form_data = aiohttp.FormData()
form_data.add_field('field1', 'value1')
form_data.add_field('file1', open('file1.txt', 'rb'), filename='file1.txt')
form_data.add_field('field2', 'value2')
form_data.add_field('file2', open('file2.txt', 'rb'), filename='file2.txt')
        

[demhadais]

Did you ever figure out a workaround for this? I'm trying to do the same thing.