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ProgrammingDEV Community ·

Previewing a Site on a New Server Without Editing the Hosts File

Migrating a website typically involves editing the local hosts file to test it on a new server before changing DNS records. This works because browsers still send the real domain name in the HTTP Host header and TLS SNI, so the server responds as it would after a live DNS change. Visiting the server's bare IP address instead fails because the server cannot tell which site is requested. The approach has practical drawbacks: entries are local and hard to share with colleagues, wildcard subdomains are unsupported, and stock mobile devices cannot be edited. Firefox's DNS over HTTPS can also bypass the hosts file entirely, while Chrome generally still respects it.

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ProgrammingDEV Community ·

Hosting a Lovable App on Your Own Server with Coolify

A Lovable app can be deployed to a self-managed server using Coolify by building it as a static Vite site from the linked GitHub repo. Coolify's self-hosted version is free and the main cost is the server, such as a Hetzner CAX21 at about 10.49 euros a month. However, this only moves the front end: a Lovable Cloud backend, which runs on Supabase, stays with Lovable unless it is migrated. The author outlines two options for moving the data, either to a Supabase project the user owns or to self-hosted Supabase on the same server, the latter requiring more ongoing upkeep. Refreshing client-side routes returns a 404 unless the Nginx config includes a single-page fallback, and changes require a redeploy rather than a restart.

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ProgrammingDEV Community ·

SparkLend Upgrade Review Flags Storage Collision and Governance Timelock Risks

A compatibility review of SparkLend, a money market with roughly $5.06 billion in total value locked across Ethereum and layer-2 networks, examined its proxy-based upgrade architecture. The assessment identified storage-slot collision as a high-severity risk, since upcoming upgrades add state variables without reserved storage gaps. It rated upgrade-authority compromise as critical, citing a 24-hour governance timelock that is shorter than the 48 hours common among comparable protocols. Additional medium and lower-severity concerns included delegatecall-based interest-rate modules, cross-chain state synchronization on bridge adapters, and a reentrancy-guard bypass in the liquidation path. The reviewer concluded the upgrade framework is generally sound but needs stricter storage-gap discipline and a longer timelock.

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ProgrammingDEV Community ·

Sloth Roll turns iPhone screenshots into calendar events, places and expenses on-device

Sloth Roll is an iPhone app built for the Hacktoberfest Open-Source AI Challenge that reads screenshots with an open-weight vision model running locally on the phone. Each screenshot becomes a swipeable card that adds an event to Calendar, opens a place in Apple Maps, or saves a receipt to an in-app expense list. The app also flags blurry, duplicate or unhelpful screenshots for one-tap deletion through iOS's Recently Deleted flow. Processing happens entirely on-device after a one-time model download of about 1.8 GB, so it works offline. In a test scan of 50 new images, the app read 43 and found 19 actions in roughly 3.7 minutes.

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ProgrammingDEV Community ·

Cómo planear el cronograma de un evento aplicando el método de un despliegue de software

El artículo propone organizar un evento, como una boda o una reunión de oficina, con la misma disciplina que un despliegue de software. Según la autora, los fallos suelen deberse al orden de las tareas, no a los detalles visibles, como ocurre con dependencias no anotadas o tiempos demasiado optimistas. El método comienza fijando la hora de llegada de los invitados y la hora de entrega del lugar, y ajustando el resto entre esos límites, dejando margen para el desmontaje. Recomienda asignar un responsable con nombre para cada bloque, sumar unos 15 minutos de colchón por cada hora de programa y definir de antemano un plan B para imprevistos como la lluvia. Finalmente, sugiere compartir cada versión actualizada del cronograma con fecha para que todos trabajen con la misma información.

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ProgrammingDEV Community ·

Python script turns a spider web pattern into a 3D-printable bowl

A DEV Community post describes a method for converting a flat spider web drawing into a 3D-printable bowl using Python and the manifold3d library. The approach draws the web as a 2D cross-section, extrudes it downward, and subtracts it from a spherical-cap bowl shell. The same technique can be applied to other patterns, such as a leaf design placed at golden-angle positions. The author notes the models have not been test-printed yet, though the renders appear correct and the meshes form single manifold solids. Finished versions of the spider web and leaf bowls are available on Cults3D.

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ProgrammingDEV Community ·

Probabilistic graph neural inference aims to improve satellite anomaly response with built-in auditability

A developer working on satellite anomaly triage found that a temporal autoencoder and threshold rules missed a reaction wheel fault that appeared as correlated, sub-threshold drift across several subsystems. Seeking a fix, they explored graph neural networks, where subsystems are nodes and their physical and functional dependencies are edges, so each subsystem's score can reflect its neighbors' states. They argue that operators need calibrated probability distributions over failure modes, not binary verdicts, and that the reasoning behind each output must be traceable for later review. The write-up walks through the graph construction, probabilistic inference method, audit trail design, and lessons from a prototype tested on simulated data.

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ProgrammingDEV Community ·

Plex Media Server SSRF flaw CVE-2026-96655 added to CISA's exploited vulnerabilities list

CISA added CVE-2026-96655, a server-side request forgery flaw in Plex Media Server, to its Known Exploited Vulnerabilities catalog on 20 October 2026. The issue affects Media Server version 1.43.2 and earlier, and is fixed in version 1.43.3.10861. An authenticated user can abuse the transcoding endpoint to make the server fetch arbitrary addresses, including internal services and cloud metadata endpoints. Because the attack requires only an authenticated account, shared or household users could be enough to exploit it. Administrators are urged to upgrade promptly and confirm the running version after updating.

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ProgrammingDEV Community ·

Power, Grounding and Enclosure Rules for a 60 GHz Radar Module

Failed radar product tests are usually traced to the power supply, ground routing, or an enclosure placed too close to the antenna rather than the sensor itself. The 3.3 V figure on the pinout refers only to I/O logic levels, so modules must be powered from 4.5–5.5 V, with ripple held to 100 mV or less using an LDO after the switcher. Power budgets should account for current peaks, since the fall module can draw 300 mA and the sleep module needs 200 mA available. Load switching should sit in a separate power domain, joined to the module ground at a single point, and GPIO pins should drive transistor gates rather than relays or lamps directly. The housing over the antenna should be flat, non-metallic, and positioned 3–5 mm from the antenna face, with nothing metallic nearby.

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ProgrammingHacker News ·

http2shell: Newly Disclosed Vulnerability Enables Remote Code Execution in Node, Python and Other Frameworks

Aikido Security has reportedly disclosed a vulnerability dubbed http2shell that enables remote code execution. The flaw is said to affect applications built with Node, Python and other technologies. The information was shared through a social media post linked from a Hacker News discussion, which drew modest attention. Specific technical details, affected versions and mitigation steps were not available in the material provided.

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ProgrammingDEV Community ·

Free FMCSA census query surfaces newly registered trucking companies

A developer shared a method for pulling newly registered trucking companies from the FMCSA carrier census, which is published as open data on data.transportation.gov. The approach uses a SoQL query over plain HTTP, filtering active records by registration date and state, and requires no API key for light use. The author notes that the raw dataset lacks built-in deduplication, operating authority status, and normalized fields, which must be handled separately. To address these gaps, the author built a paid Apify actor that joins authority data, applies filters, avoids repeat deliveries, and exports results in JSON, CSV, or Excel. The article notes the author's bias, since they built the tool they promote.

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ProgrammingDEV Community ·

Expo Router navigation slows past 40 nested routes, with fixes for layout re-renders and focus

A team migrating a multi-tenant dashboard from React Navigation to Expo Router found a performance drop at around 42 nested routes, with animations falling from 60fps to 38fps and memory rising 140MB on Android mid-range devices. Benchmarks on a Pixel 5 and iPhone 12 using Expo SDK 52 and React Native 0.76 showed navigation time and frame drops rising sharply as route depth increased. The team attributed the problem to re-renders of the layout tree on navigation events, compounded by runtime TailwindCSS class recalculation in nested layouts. Replacing dynamic class props with static StyleSheet references cut navigation time at 50 routes from 187ms to 94ms and reduced frame drops per transition from 9 to 3. The team also found that modal routes overlaying tab navigators broke screen reader focus, which they addressed by wrapping the modal in a container with accessibilityViewIsModal.

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ProgrammingDEV Community ·

Plex Media Server flaw CVE-2026-96655 can be checked in logs for prior exploitation

Patching Plex Media Server to 1.43.3.10861 closes the SSRF in CVE-2026-96655, but it does not reveal whether the flaw was already abused. The bug allows an authenticated user to make the server fetch an attacker-chosen target via the universal transcoder endpoint. Investigators are advised to compare endpoint activity against a baseline of normal household use and to look for internal network connections from the Plex host that it would not normally make. Failed transcode sessions can serve as a weak triage signal but are not conclusive evidence. If compromise is suspected, logs and connection records should be preserved, the involved account disabled, and any exposed credentials rotated before patching.

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ProgrammingDEV Community ·

Video generation models still face a wide gap between demos and production use

Video models can produce impressive short clips in marketing demos, but production pipelines run into latency problems, weak frame-to-frame consistency, limited camera control, and mandatory brand-safety review. Treating video generation as simply a longer form of image generation tends to underestimate costs and iteration cycles. Teams that successfully ship multimodal features usually begin with narrower tasks such as understanding clips, captioning meetings, or extracting frames for search. Assisted editing, storyboards, and animatics are also more practical than generating final pixels for regulated brands. The article notes that legal and brand review often takes more time than GPU inference, and it recommends tools with controllable parameters and evaluation methods for temporal artifacts.

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ProgrammingDEV Community ·

Explainer: How IaaS, PaaS and SaaS Differ in Cloud Computing

Cloud computing lets people use computing resources over the internet rather than owning and maintaining physical hardware themselves. The article explains three common cloud service models: IaaS, PaaS, and SaaS. IaaS provides virtual servers, storage, and networking, leaving users in charge of their operating systems and applications. PaaS offers a ready-made environment for building, testing, and deploying software, so developers can focus on code instead of server management. The piece uses everyday analogies, such as renting an empty apartment or a fully equipped kitchen, to clarify how control and responsibility vary across these models.

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ProgrammingDEV Community ·

STREAM-MATE: An In-Character AI Co-Host for Twitch and YouTube Streams

STREAM-MATE is an open-source, MIT-licensed tool that acts as an in-character AI co-host for live streams on Twitch and YouTube. It handles live chat, realtime voice, and an on-screen avatar, and it checks each reply before it goes to air. The interface is available in English and Russian. The article's author says the tool reads only the data it is pointed at and sends nothing to external services. The author also cautions that its rule-based checker can produce false positives and is best used to flag candidates for rewriting rather than to grade writing.

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ProgrammingDEV Community ·

Ameobius AI launches portfolio site collecting its MCP servers, browser pipelines and audio tools

The Ameobius AI project has published a portfolio website gathering its tools in one place, including MCP servers, browser and CDP pipelines, audio and music-AI wrappers, and quality-control utilities. The site is available in Russian, English and Chinese and is hosted on GitLab Pages, with a mirror on Vercel. The author's write-up focuses less on features and more on the tool's limitations and where it fails. The checker-style tools are described as prone to false positives, meant for finding rewrite candidates rather than grading writers. The project is MIT-licensed, built on the standard library, and sends no data anywhere.

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ProgrammingDEV Community ·

Polylane: AI on-call assistant aims to cut incident MTTR from 45 to under 15 minutes

Polylane is an LLM-based on-call assistant that helps teams respond to incidents on Cloudflare faster. According to the article, the SRE team at Acme Corp reported cutting mean time to resolution for critical incidents from about 45 minutes to under 15 minutes after deploying it. The tool ingests telemetry from sources such as Datadog, Prometheus and Cloudflare logs, then proposes actions validated in a sandbox before calling the Cloudflare API. Notifications and escalations can be routed to Slack, PagerDuty and GitHub Actions, with human approval required for sensitive steps. The guide walks readers through setup, configuration and playbook testing.

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ProgrammingDEV Community ·

Haven Rehab Coach for Post-Mastectomy Patients Wins Tiger Data Award

Haven is a home rehabilitation coach designed to guide patients through shoulder exercises after breast cancer surgery, using a laptop camera and a wearable armband. The system keeps patients within movement limits set by their physical therapist and gives clinicians a detailed view of recovery between visits. The author built the backend, a Node.js and TypeScript API running on Vercel, with a time-series data layer on Tiger Cloud, Gemini-generated reports, and Auth0 sign-in. Because the armband streams arm angle data many times per second, the database schema uses hypertables, columnstore compression, and continuous aggregates to keep dashboards fast as data grows. The team's guiding principle is that deterministic code handles all safety checks while the AI only generates the wording.

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ProgrammingDEV Community ·

Polylane Launches AI On-Call Assistant for Diagnosing Cloudflare Edge Failures

Polylane, a new AI-driven on-call platform, has launched on Product Hunt to help SRE and security teams respond to Cloudflare edge failures. It uses an LLM-based engine to parse Cloudflare logs, correlate third-party telemetry, and generate remediation steps within seconds. The article is a deployment guide covering API credentials, a sample playbook, Slack and PagerDuty integration, security practices, monitoring, and GitHub Actions automation. It cites rising search interest and community discussion as signs of demand, and frames the tool as a response to fatigue and alert noise exposed by the September 2024 Cloudflare outage.

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