Problema com envio de imagens via Filepicker para API

[foxthamesm]

Question

Eu estou trabalhando em um plataforam aonde eu tenho que cadastrar produtos para campanha promocional, estou usando o flet para isto, porém quando eu quero fazer o upload da imagem para API, eu tenho um erro que diz que o conteudo não consegue ser processado.

gostaria de saber como eu posso fazer um upload de arquivo para minha API (eu estou usando o flet web)

Code sample

def realizar_upload(e: ft.FilePickerResultEvent):

        if e.files:
            arquivo = e.files[0]
            nome_arquivo.value = f"Selecionado: {arquivo.name}"
            resultado.value = "Iniciando upload..."
            page.update() 
            uploadlist = ft.FilePickerUploadFile(
                name=arquivo.name,
                upload_url=url_api
            )

            file_picker.upload(uploadlist)

        else:
            resultado.value = "Nenhum arquivo selecionado."
            page.update()

Error message

2025-06-25T01:06:36.145236762Z ==> Running 'uvicorn main:app --host 0.0.0.0 --port 10000'
2025-06-25T01:06:41.95019427Z INFO:     Started server process [86]
2025-06-25T01:06:41.9502186Z INFO:     Waiting for application startup.
2025-06-25T01:06:41.950567348Z INFO:     Application startup complete.
2025-06-25T01:06:41.950855014Z INFO:     Uvicorn running on http://0.0.0.0:10000 (Press CTRL+C to quit)
2025-06-25T01:06:42.364624526Z INFO:     191.37.67.199:0 - "HEAD / HTTP/1.1" 405 Method Not Allowed
2025-06-25T01:06:42.372157763Z INFO:     191.37.67.199:0 - "HEAD / HTTP/1.1" 405 Method Not Allowed
2025-06-25T01:06:42.740924552Z INFO:     191.37.67.199:0 - "GET / HTTP/1.1" 200 OK
2025-06-25T01:06:42.744118713Z INFO:     191.37.67.199:0 - "HEAD / HTTP/1.1" 405 Method Not Allowed
2025-06-25T01:06:42.938978795Z INFO:     191.37.67.199:0 - "GET /favicon.ico HTTP/1.1" 404 Not Found
2025-06-25T01:06:43.019601983Z INFO:     191.37.67.199:0 - "GET /favicon.ico HTTP/1.1" 404 Not Found
2025-06-25T01:22:44.349721716Z INFO:     Shutting down
2025-06-25T01:22:44.450299155Z INFO:     Waiting for application shutdown.
2025-06-25T01:22:44.450461338Z INFO:     Application shutdown complete.
2025-06-25T01:22:44.45054765Z INFO:     Finished server process [86]
2025-06-25T01:26:16.112715859Z ==> Running 'uvicorn main:app --host 0.0.0.0 --port 10000'
2025-06-25T01:26:21.713704097Z INFO:     Started server process [86]
2025-06-25T01:26:21.713728707Z INFO:     Waiting for application startup.
2025-06-25T01:26:21.713900502Z INFO:     Application startup complete.
2025-06-25T01:26:21.71420942Z INFO:     Uvicorn running on http://0.0.0.0:10000 (Press CTRL+C to quit)
2025-06-25T01:26:23.451091136Z INFO:     191.37.67.199:0 - "POST /cadastrar_produto/ HTTP/1.1" 405 Method Not Allowed
2025-06-25T01:28:48.461072368Z INFO:     191.37.67.199:0 - "OPTIONS /cadastrar_produto/ HTTP/1.1" 200 OK
2025-06-25T01:28:48.693848966Z INFO:     191.37.67.199:0 - "PUT /cadastrar_produto/ HTTP/1.1" 422 Unprocessable Content
2025-06-25T01:35:36.0827105Z INFO:     191.37.67.199:0 - "OPTIONS /cadastrar_produto/ HTTP/1.1" 200 OK
2025-06-25T01:35:36.322851532Z INFO:     191.37.67.199:0 - "PUT /cadastrar_produto/ HTTP/1.1" 422 Unprocessable Content
2025-06-25T01:40:40.040902949Z INFO:     191.37.67.199:0 - "OPTIONS /cadastrar_produto/ HTTP/1.1" 200 OK
2025-06-25T01:40:40.271962641Z INFO:     191.37.67.199:0 - "PUT /cadastrar_produto/ HTTP/1.1" 422 Unprocessable Content
2025-06-25T01:56:40.896280815Z INFO:     Shutting down
2025-06-25T01:56:40.996781103Z INFO:     Waiting for application shutdown.
2025-06-25T01:56:40.996887016Z INFO:     Application shutdown complete.
2025-06-25T01:56:40.996961238Z INFO:     Finished server process [86]

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• I have searched for answers to my question both in the issues and in previous discussions.