SShortSingh.
TopTechnologyAI & MLStartupsProgrammingScienceBusinessFinanceCrypto & Web3World
Back to feed
Programming

Dev builds public JSON API for Lineage 2 server tracker, shares key lessons

0
·1 views

A developer launched L2 Calendar, a tracker for Lineage 2 private server openings, to help players find upcoming servers and give owners a place to announce launches. The project recently expanded to include a public JSON API, built as a route handler within the same Next.js app rather than a separate service. A production bug caused by mysql2 returning DATE columns as strings but DATETIME columns as JavaScript Date objects led to a TypeError crash, highlighting the importance of normalizing data types at the boundary layer. CORS was enabled selectively on the read-only API route to allow browser and Discord bot access without affecting the security of admin or auth routes. The developer's key takeaways were to always normalize dates at the data layer, cache shared queries with a TTL, and make public data freely accessible to encourage third-party tools.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Log in to join the discussion and vote.

Log in

Related stories

0
ProgrammingDEV Community ·

Lambda Language Compiler Achieves Self-Hosting Bootstrap After Fixing Hidden Bugs

A small low-level language called 'lm' with four backends — C, WebAssembly, ARM64, and a bytecode VM — has reached a self-hosting milestone, where its compiler can reproduce itself byte-for-byte across build stages. The project's 94-test suite, while robust for cross-backend consistency checks, could not verify whether the lm-written compiler agreed with its own output, a gap that bootstrapping was designed to close. To confirm correctness, the compiler was built through successive stages until stage3 and stage4 produced identical 7,023-line outputs. The process uncovered two bugs invisible to the existing test suite: an ARM64 register corruption during large memory moves, and a Node.js pipe-buffering issue that silently truncated output exceeding a few thousand lines. Both flaws only surfaced when the compiler processed its own substantially larger source files, highlighting the limits of small-scale test corpora for validating self-hosting compilers.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Why changing an image's DPI tag alters no pixels and causes zero quality loss

A print shop recently rejected a high-resolution 4000×2667 pixel photo solely because its metadata listed 72 DPI, even though the image contained more than enough pixels for an 8×10 inch print at 300 DPI. DPI is stored as a metadata tag in the file header — not embedded in the pixel data itself — and exists in different locations depending on the format: JFIF and EXIF fields in JPEGs, and the pHYs chunk in PNGs. Because rewriting this tag only updates a small integer in the header without decoding or re-encoding pixel data, the operation is completely lossless. By contrast, using an image editor's 'resize to 300 DPI' function typically resamples and re-encodes the file, introducing unnecessary quality degradation in formats like JPEG. The correct workflow is to verify that pixel dimensions divided by target DPI meet the required print size, and if so, simply rewrite the metadata tag rather than altering the image itself.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Developer Builds Free AI Compliment Generator Using Google Gemini Vision

A developer has created HypeBESTIE, a free image-based compliment generator built with Google Gemini's multimodal vision API, submitted as part of a Weekend Generosity Challenge on DEV Community. Users can upload a photo of themselves or a friend, and the tool generates a personalized, styled 'Hype Receipt' featuring custom aesthetic archetypes and detailed visual observations. The app also includes a dedicated friend mode, allowing users to enter a name and instantly share a bespoke compliment via Instagram Stories, Gmail, or mobile. The project was built using a TypeScript and React frontend paired with an Express backend, with structured JSON schema outputs enforced through the Gemini SDK to enable formatted receipt-style display. The creator stated the motivation was to counter social media's culture of withheld validation by offering unconditional, zero-cost praise.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Ahoi Library Bridges Rust/Wasm Reactive State With SolidJS, React, Vue, and Svelte

A developer has released Ahoi, an open-source library designed to manage reactive state in Rust/WebAssembly and expose it cleanly to JavaScript frontend frameworks. The project consists of a Rust crate that handles the core reactivity engine and separate npm packages acting as thin bridges for SolidJS, React, Vue, and Svelte. State is declared in Rust using a 'Stock' struct, while typed signals and commands flow between Rust and JS through 'Hail' and 'Tell' enums, giving JavaScript fully typed reactive values without manual bridging code. Ahoi was created to fill a gap between hand-rolling Rust-JS bridges and adopting a full Rust frontend framework like Leptos or Dioxus. The library is an early release, available on GitHub, crates.io, and npm, with the author actively seeking community feedback.

0 comments Read more at DEV Community