RShiny shuts down after POST request with multipart encoding

[hunglin59638]

I operate an R Shiny app that includes a button capable of triggering an API to send a POST request (using httr) with multipart encoding. However, it shuts down after the execution is completed.

    response <- POST(
        url = url,
        body = body, encode = "multipart", verbose()
    )

faucet start --dir . --host 0.0.0.0:6209 --workers 4

ui-1  | [2024-12-27T09:44:10Z INFO  Worker::3] 192.168.3.197 "POST /session/a9f143d81a9dbed2aec2fc55b7e3944f/dataobj/db_metadata?w=&nonce=b82bde8165e32c56 HTTP/1.1" 200 "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36" 127
ui-1  | [2024-12-27T09:44:19Z INFO  Worker::3] 192.168.3.197 "POST /session/a9f143d81a9dbed2aec2fc55b7e3944f/upload/72e7dd3b26e8d0e1c89d209e?w= HTTP/1.1" 200 "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36" 103
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> POST /receive HTTP/1.1
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> Host: db:14582
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> User-Agent: libcurl/8.9.1 r-curl/5.2.1 httr/1.4.7
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> Accept-Encoding: deflate, gzip, zstd
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> Accept: application/json, text/xml, application/xml, */*
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> Content-Length: 12579
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] -> Content-Type: multipart/form-data; boundary=------------------------KpVFtJiPZN8YhZOGt9RSaj
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] ->
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >> --------------------------KpVFtJiPZN8YhZOGt9RSaj
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >> Content-Disposition: form-data; name="exp_arrival_time"
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >>
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >> 2024-12-27 17:44
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >> --------------------------KpVFtJiPZN8YhZOGt9RSaj
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >> Content-Disposition: form-data; name="receive_time"
ui-1  | [2024-12-27T09:44:21Z WARN  Worker::3] >>
ui-1  | [2024-12-27T09:44:21Z ERROR faucet] Worker::3's process (58) exited with status signal: 13 (SIGPIPE)
ui-1  | [2024-12-27T09:44:21Z INFO  faucet] Starting process 576 for Worker::3 on port 42160