B4J Question [Banano] API Fetch login to FastAPI Error [SOLVED]

[MichalK73]

Hello.

I have a small problem and I don't know why it's not working. I have written a RestAPI server in FastAPI (python). It handles login and the result is an access token.
When the login function is written in FastAPI standard 'OAuth2PasswordRequestForm'. At Swagger or Postman, there are no problems with logging in and obtaining a token. The problem is when I want to connect via Banano.

@router.post('/login')
def login(request : OAuth2PasswordRequestForm = Depends(), db : Session = Depends(database.get_db)):
    room = db.query(models.Room).filter(models.Room.name == request.username).first()
    print(request.username)
    if not room:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND,
                            detail=f'Not found: {request.username}')
    if not hashing.Hash.verify(room.password, request.password):
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED,
                            detail=f'Password id bed :(')
    #generujemy token i zwracamy
    # access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    access_token = create_access_token(data={"sub": room.name})

   return {"access_token": access_token, "token_type": "bearer", "id_room":room.id}

Login in Swagger UI

CURL URL

curl -X 'POST' \
  'http://localhost:8000/login' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d 'grant_type=&username=aaa&password=12345&scope=&client_id=&client_secret='

Login in Postman

As you can see, the login parameters are only available via POST in the BODY.

Login function from Banano.

    Dim response As BANanoFetchResponse
    Dim error As BANanoObject
    Dim data As BANanoJSONParser
    
    ' insert with a POST
    Dim fetch2Options As BANanoFetchOptions
    fetch2Options.Initialize
    fetch2Options.Method = "POST"
    fetch2Options.Body = BANano.ToJson(CreateMap("username": "aaa", "password": "12345"))
    fetch2Options.Headers = CreateMap("Content-type": "application/json; charset=UTF-8", "Content-Type": "application/x-www-form-urlencoded")

  
    Dim fetch2 As BANanoFetch
    fetch2.Initialize("http://localhost:8000/login/", fetch2Options)
    fetch2.Then(response)
    fetch2.Return(response.Json)
    fetch2.Then(data)
    Log(data)
    fetch2.End

I get an error. "INFO: 127.0.0.1:62754 - "POST /login HTTP/1.1" 422 Unprocessable Entity" in server FASTAPI.
In browser:

What else is wrong with the code that does not allow me to pass Banana data?
I would like to mention that when I added a login function in FastAPI where username and password are to be passed via Headres, it works correctly in Banano.

    Dim response As BANanoFetchResponse
    Dim error As BANanoObject
    Dim data As BANanoJSONParser
    
    ' insert with a POST
    Dim fetch2Options As BANanoFetchOptions
    fetch2Options.Initialize
    fetch2Options.Method = "GET"
    fetch2Options.Headers = CreateMap("Content-type": "application/json; charset=UTF-8", "username":"aaa", "password":"12345")
  
    Dim fetch2 As BANanoFetch
    fetch2.Initialize("http://localhost:8000/login2/", fetch2Options)
    fetch2.Then(response)
    fetch2.Return(response.Json)
    fetch2.Then(data)
    Log(data)
    fetch2.End

In response in browser:

The problem as you can see occurs in the POST in the BODY for BANANO.
All hints of a solution welcome.

 

[Mashiane]

Did you manage to fix this?

 

[MichalK73]

I didn't manage to send banana data via post, I just use via headers.

 

[alwaysbusy]

@MichalK73 Sorry, I did miss this post (it was in my summer holiday )

In BANano you are posting Json, while in postman application/x-www-form-urlencoded as the body. Actually, you were trying to do both:

fetch2Options.Headers = CreateMap("Content-type": "application/json; charset=UTF-8", "Content-Type": "application/x-www-form-urlencoded")

Hard to test now but the body would've probably have been something like:

Dim fetch2Options As BANanoFetchOptions
fetch2Options.Initialize
fetch2Options.Method = "POST"
    
' create a new URLSearchParams object
Dim data As BANanoObject
data.Initialize2("URLSearchParams", CreateMap("username": "aaa", "password": "12345"))
' set it to body
fetch2Options.Body = data.RunMethod("toString", Null)
    
fetch2Options.Headers = CreateMap("Content-Type": "application/x-www-form-urlencoded")

Alwaysbusy

 

[MichalK73]

@MichalK73 Sorry, I did miss this post (it was in my summer holiday )

Dim fetch2Options As BANanoFetchOptions
fetch2Options.Initialize
fetch2Options.Method = "POST"
   
' create a new URLSearchParams object
Dim data As BANanoObject
data.Initialize2("URLSearchParams", CreateMap("username": "aaa", "password": "12345"))
' set it to body
fetch2Options.Body = data.RunMethod("toString", Null)
   
fetch2Options.Headers = CreateMap("Content-Type": "application/x-www-form-urlencoded")

Alwaysbusy

Now I was only able to check if it works. I had a bit of a cold.
The code works correctly, FastApi now authorizes and gives the token correctly.
Many thanks for your help.