Streamlit on Codeshttps://codes.metacog.co.kr/tags/streamlit/Recent content in Streamlit on CodesHugo -- gohugo.ioen© {year} jeonck. Distributed under [MIT](https://opensource.org/licenses/MIT).Mon, 21 Sep 2026 00:00:00 +0000Google sign-in on a Streamlit app: st.login() is only half the gatehttps://codes.metacog.co.kr/posts/streamlit-google-signin-is-not-an-allowlist/Mon, 21 Sep 2026 00:00:00 +0000https://codes.metacog.co.kr/posts/streamlit-google-signin-is-not-an-allowlist/A successful Google sign-in proves someone owns a Google account — not that they may use your app. Without an allowlist the page is open to everyone, and a new OAuth client answers every sign-in with 403 until the consent screen is dealt with.The sign-in gate is the one screen every visitor sees — mine said only "sign in"https://codes.metacog.co.kr/posts/sign-in-gate-is-a-page-too/Mon, 21 Sep 2026 00:00:00 +0000https://codes.metacog.co.kr/posts/sign-in-gate-is-a-page-too/A gated app shows its login screen to everyone and its actual product to almost nobody. Putting a live sample on that screen took a few lines — and immediately exposed a CDN that had been failing silently for anyone whose network was not mine.Korean rendered as empty boxes in a reportlab PDF — the runtime font download was never going to workhttps://codes.metacog.co.kr/posts/reportlab-korean-font-empty-boxes/Sun, 20 Sep 2026 00:00:00 +0000https://codes.metacog.co.kr/posts/reportlab-korean-font-empty-boxes/A Streamlit invoice generator downloaded NanumGothic on first use and silently fell back to Helvetica when that failed. Helvetica has no Hangul — and no won sign either, which broke English invoices too.