Sanghyuk Jung benelog

Sanghyuk Jung

Software Engineer in NAVER corp.

Small tools I have released.

one-ftpserver Go: A complete FTP server started by one command, with no configuration file. Every setting is a flag, so --help is the entire reference, and --ssl is all FTPS takes: the certificate is generated in memory at startup.
uploader Go: A single-binary web app for putting a file on a server through a browser. Handy when SSH is not at hand; uploads are streamed to disk, so file size is not a concern.

md-lens Go: A rich terminal Markdown viewer (mdl) with syntax-highlighted code, inline images, and large font headings.
pdf-refinery Python: A CLI that turns scanned book PDFs into searchable documents. PaddleOCR text is laid over the page invisibly, so the original appearance is kept while the text becomes searchable and selectable.
obsidian-site TypeScript: A static site generator for Obsidian vaults, with wikilink navigation, auto-generated backlinks, and an interactive link graph. To start from scratch, use obsidian-site-template.

shell-proxy Go: An HTTP server that runs shell commands and returns the result as JSON, with a terminal-style web UI. Stateless by default as a single static binary, or --interactive for a real PTY streamed to a browser terminal, enough to run vi or top.
dumper Java: A small web application for downloading a Java stack dump from a browser.

Each link opens the pull requests I sent to that project.

Spring Batch: Bug fixes and API additions, including JobParameters propagation in MetaDataInstanceFactory, delete operations for ResourcelessJobRepository, and a Callable constructor for CallableTaskletAdapter.
Spring Boot: Corrections to the Batch auto-configuration properties and their documentation.
Robolectric: Shadow implementations, including ShadowProcess and a reimplementation of ShadowCookieManager on top of Apache HttpClient's CookieStore.
Apache Struts: Corrections to logging messages, applied to both the 2.3.x and 2.5.x branches.
tz database: Corrections to Korean time zone history. Many pre-1989 time stamps for Asia/Seoul and Asia/Pyongyang were fixed from my report, released in tzdata 2014j.