Errror parsing data in python FastAPI

Question

I'm learning to use FastAPI, and I'm getting this error over and over again while implementing a simple API and I've not being able to figure out why

"detail": "There was an error parsing the body"

This happends me on this two endpoints:

Full code: Code Repository

snippet:

app_v1 = FastAPI(root_path='/v1')

# JWT Token request
@app_v1.post('/token')
async def login_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
    jwt_user_dict = {"username": form_data.username, "password": form_data.password}
    jwt_user = JWTUser(**jwt_user_dict)
    user = authenticate_user(jwt_user)
    if user is None:
        return HTTP_401_UNAUTHORIZED
    jwt_token = create_jwt_token(user)
    return {"token": jwt_token}

request:

@app_v1.post("/user/photo")
async def update_photo(response: Response, profile_photo: bytes = File(...)):
    response.headers['x-file-size'] = str(len(profile_photo))
    response.set_cookie(key='cookie-api', value="test")
    return {"profile photo size": len(profile_photo)}

request:

Have you tried this answer stackoverflow.com/a/60670614/977593 already? — slackmart
– slackmart, Commented Jun 16, 2020 at 4:08

Rodrigo A · Accepted Answer · 2020-06-17 02:04:28Z

18

I acomplished to figure out, it was because when FastAPI was installed, it didn't install python-multipart, so with this package missing everything that needs multipart falls

After installing it works fine

Thanks

answered Jun 17, 2020 at 2:04

Rodrigo A

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1 Comment

Akio Over a year ago

After installing python-multipart just like what you did, my form data worked, thank you!

Marcelo Trylesinski · Accepted Answer · 2020-06-16 21:18:31Z

0

The problem with the first request is that you should be sending username and password in a form-data. Instead of x-www-form-urlencoded, use form-data and you should be fine.

I can't see the problem with the second one. Can you try using Swagger interface and see if the same happens there?

answered Jun 16, 2020 at 21:18

Marcelo Trylesinski

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1 Comment

Rodrigo A Over a year ago

I've tried form data too, but still gets the same error, even from the swagger. I edit question to show the swagger print

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