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CokeBear

Maker of Clipboard Share (clipboardapp.org), a free no-code online clipboard. Digital tutor at a middle school in Korea, building with Claude Code.

Location South Korea Joined Joined on  Personal website https://www.clipboardapp.org github website
From a 100 MB cap to 5 GB: Cloudflare R2 multipart upload with resume and cancel in the browser
kangchanghwan profile

From a 100 MB cap to 5 GB: Cloudflare R2 multipart upload with resume and cancel in the browser

#showdev #webdev #javascript #node
1
Comments
4 min read

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Locking files in the browser with Web Crypto: PBKDF2, HKDF, and 1 MiB AES-GCM records
kangchanghwan profile

Locking files in the browser with Web Crypto: PBKDF2, HKDF, and 1 MiB AES-GCM records

#showdev #webdev #javascript #security
1
Comments
9 min read
My "three-tier" upload path had two tiers: presigned R2 PUTs, batch signing, and an endpoint nothing called
kangchanghwan profile

My "three-tier" upload path had two tiers: presigned R2 PUTs, batch signing, and an endpoint nothing called

#showdev #webdev #javascript #node
1
Comments 1
4 min read
Zero-step device pairing: Socket.IO rooms from an HMAC of the public IP (and the IPv6 bug I shipped)
kangchanghwan profile

Zero-step device pairing: Socket.IO rooms from an HMAC of the public IP (and the IPv6 bug I shipped)

#showdev #webdev #node #socketio
2
Comments 1
4 min read
I let an AI agent run my side project's growth loop: intent.md, CI gates and metric bands
kangchanghwan profile

I let an AI agent run my side project's growth loop: intent.md, CI gates and metric bands

#showdev #ai #webdev #sideprojects
Comments 2
6 min read
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