I have an endpoint that takes a file and a string parameter that I pass through a form body. But I noticed when debugging that:
import uvicorn
from fastapi import FastAPI, File, Form
app = FastAPI()
@app.post('/test')
def test(test_item: str = Form(...), test_file: bytes = File(...)):
return {
"test_item": test_item,
"test_file_len": len(test_file),
"test_file_contents": test_file.decode('utf-8')
}
if __name__ == '__main__':
uvicorn.run(app, host="0.0.0.0", port=8000)
using this simple curl command with the test_file.txt having some text in it:
curl localhost:8000/test -X POST -F test_file=@"test_file.txt" -F test_item="test"
didn't work with this error:
{
"detail": [
{
"loc": [
"body",
"test_file"
],
"msg": "byte type expected",
"type": "type_error.bytes"
}
]
}
but interestingly, this did work:
import uvicorn
from fastapi import FastAPI, File, Form
app = FastAPI()
@app.post('/test')
def test(test_file: bytes = File(...), test_item: str = Form(...)):
return {
"test_item": test_item,
"test_file_len": len(test_file),
"test_file_contents": test_file.decode('utf-8')
}
if __name__ == '__main__':
uvicorn.run(app, host="0.0.0.0", port=8000)
the only difference being that you get the File before the Form element. Does anybody know why that would happen? Looks like it's required to upload files before forms. Maybe the file gets killed when Form parses the http form body. I didn't see anything on the FastAPI documentation about this for Form and Files.
