标签：#ast

AWS has outlined how ProGlove, an industrial-wearables manufacturer, was able to scale its SaaS platform to run more than one million AWS Lambda functions spread across thousands of dedicated customer accounts. By Matt Foster

It was 2 AM on a Tuesday, and I was staring at my CourseSpeed dashboard looking at a graph that claimed I had just finished a 14-hour AWS certification course in 47 minutes. I hadn't. I was just testing the 16x speed toggle. But my analytics engine thought I was a god. When I started building CourseSpeed—a browser extension to inject custom playback speeds and track learning analytics across Udemy, Coursera, LinkedIn Learning, and Skillshare—I thought the hard part would be the UI. It wasn't. Injecting a floating control panel and setting document.querySelector('video').playbackRate = 2.5 takes about ten lines of JavaScript. The actual nightmare was the learning analytics. Specifically, accurately tracking effective watch time versus wall-clock time across wildly different Single Page Applications (SPAs). The naive approach that burned me My first pass at the analytics tracker was straight out of MDN. I listened to the standard HTML5 video events. // The approach that worked perfectly in my head const video = document . querySelector ( ' video ' ); video . addEventListener ( ' ratechange ' , ( e ) => { sendAnalytics ({ type : ' speed_change ' , rate : e . target . playbackRate }); }); video . addEventListener ( ' timeupdate ' , () => { logWatchTime ( video . currentTime , video . playbackRate ); }); This worked flawlessly on Udemy. Then I opened LinkedIn Learning. The dashboard flatlined. Then I tried Coursera. The time spent was wildly inaccurate, drifting by minutes over an hour. I spent three days debugging this, tearing my hair out over console logs. Here is what I missed: modern learning platforms don't just drop a raw <video> tag on the page and leave it alone. They wrap it in custom players, throttle events to save CPU, and dynamically destroy and recreate the DOM node when you skip chapters or when the SPA router transitions. My event listeners were getting orphaned. Or worse, they were firing with stale data because the platform's custom wrapper was dispatc

It is been while I am learning and build around FastAPI. So there is a project where I was thinking how to add this new feature over exiting one. Like what changes I need to make in database which need to be reflected in my backend and frontend. I already lunched the web locally. Problem started When I when back to the web and reload it it shows this error: ERROR: ConnectTimeout: Unauthorized 401. I was like what? Why? I thougth there is some issue with login endpoint or refresh token function. When i did some debugging and found some new information which is: "Either Supabase's edge/pooler (or OS, or an intermediate proxy/NAT) silently kills those idle connections server-side after some timeout but client-side pool doesn't know that." As I was doing nothing in become idle state so to save the resources server side silently close that particular connection. So I came back and try to connect it give this error. First thought come it my mind after this was there should be a way to automatically check this idle state and if user was in ideal state then create a new connection. Proposed Solutions After a while I come up with these solution: Calculate the Idle time: if it is more then server connection timeout then establish new connection. Retry logic: retry once on the specific connection errors. I thought this will work but This again give me error then this new issue I faced. Cold-start connection problem There is something call dual-stack (IPv4 and IPv6) networks and Happy Eyeballs is a network mechanism which automatically move to IPv4 connection if IPv6 fails. But supabase-py uses httpx and it doesn't support Happy Eyeballs. So in first try after the connection time out it try to establish IPv6 connection which is not routeable in most Pakistani ISPs and ultimately it fails and wait for timeout. There is no way to try it again for IPv4. So we have to do it manually. So this error help me to learn many thing in process. Share your thoughts.

Static analysis isn't just for application source code. Terraform, Pulumi, OpenTofu, and CloudFormation files are code too — and they get misconfigured just as often as a backend service. A public S3 bucket, a security group open to 0.0.0.0/0 , or an unencrypted RDS instance are all bugs you can catch before apply ever runs. TFSec is the tool most people reach for first, but it's not the only option on the OWASP Source Code Analysis Tools list . In this article I'll use Checkov , a free, open-source policy-as-code scanner built by Bridgecrew (now part of Palo Alto Networks), to scan a Terraform project end to end — from a local scan to a GitHub Actions gate that blocks merges on critical misconfigurations. The same approach works with OpenTofu and Pulumi projects too, since Checkov understands HCL directly and also has native support for Pulumi's rendered plan output and CloudFormation/ARM/Kubernetes manifests. Why Checkov? 100% open source (Apache 2.0), actively maintained, thousands of built-in policies. Understands Terraform, OpenTofu, CloudFormation, Kubernetes, Helm, Dockerfile, ARM, Serverless Framework, and Pulumi (via cdktf /synthesized plans) — one tool across most of your IaC surface. No account or API key required to run locally or in CI. Supports custom policies written in Python or YAML if the built-in rule set doesn't cover something specific to your org. ## 1. The sample infrastructure A small AWS setup with a few intentionally introduced misconfigurations — the kind that get merged during a rushed sprint: # main.tf provider "aws" { region = "us-east-1" } resource "aws_s3_bucket" "data" { bucket = "company-app-data-bucket" } # Vulnerable: bucket has no encryption, no versioning, and is publicly readable resource "aws_s3_bucket_acl" "data_acl" { bucket = aws_s3_bucket . data . id acl = "public-read" } resource "aws_security_group" "web" { name = "web-sg" description = "Allow web traffic" # Vulnerable: SSH open to the entire internet ingress { from_port

Vermilion Cliffs Ventures announced Wednesday the close of a $25 million Fund II.

Why Every Modern SaaS Needs a Billing Engine (Not Just a Payment Gateway) When building a SaaS product, API platform, AI application, or cloud service, most teams start by integrating a payment gateway like Stripe or Paystack. That solves one important problem: Collecting payments. But collecting payments and managing billing are two completely different challenges. As products grow, pricing becomes more sophisticated. Customers expect usage-based billing, flexible subscriptions, prepaid credits, seat-based pricing, tiered plans, and transparent invoices. Suddenly, the billing logic inside the application becomes one of the most complex parts of the entire system. This is why more engineering teams are separating payment processing from billing infrastructure . Payment Processing vs Billing Infrastructure A payment gateway is responsible for moving money. A billing platform is responsible for determining what should be charged, when it should be charged, and why it should be charged. Although these responsibilities often get grouped together, they solve very different problems. Payment providers typically handle: Payment authorization Card processing Refunds Payment retries Bank settlements Customer payment methods A billing engine manages: Usage metering Subscription billing Pricing rules Billing cycles Invoice generation Revenue analytics Customer usage tracking Payment orchestration Multi-gateway billing Proration Credits and quotas Keeping these responsibilities separate makes systems easier to maintain, easier to scale, and much more flexible when pricing changes. Why Billing Logic Doesn't Belong Inside Your Application Many engineering teams start with a simple subscription model. Then the business evolves. Suddenly the product needs to support: API usage billing AI token billing Storage billing Compute billing Per-seat pricing Hybrid subscriptions Enterprise contracts Prepaid credits The application slowly becomes filled with billing-specific code. Developers

Something on Pluto and one of Saturn’s moons, Titan, absorbs light in a way unexplained by anything in spectroscopic databases.

Decentralized Autonomous Organizations are often presented as simple governance systems: token holders create proposals, vote, and execute decisions on-chain. In practice, building a production-grade DAO is far more difficult. A DAO is not only a smart contract. It is a distributed coordination system that combines governance logic, treasury security, token economics, identity, off-chain infrastructure, and human decision-making. A failure in any one of these layers can compromise the entire organization. Below are some of the most important technical problems DAO developers must solve. 1. Governance Attacks Through Borrowed Voting Power Many DAOs calculate voting power based on the number of governance tokens held at a specific moment. This creates a serious attack surface when tokens can be borrowed through lending protocols or flash loans. An attacker may temporarily acquire a large amount of voting power, submit or approve a malicious proposal, and return the borrowed assets shortly afterward. The standard defense is snapshot-based voting power. Instead of checking a user’s current balance, the governance contract reads historical balances from a previous block. function getVotes( address account, uint256 blockNumber ) public view returns (uint256) { return token.getPastVotes(account, blockNumber); } However, snapshots alone do not solve every problem. Developers should also consider proposal delays, minimum token-holding periods, quorum requirements, and vote-delegation risks. 2. Dangerous Proposal Execution The most sensitive part of a DAO is usually the executor. A successful proposal may call arbitrary contracts, transfer treasury assets, upgrade protocols, or change governance parameters. If proposal calldata is incorrectly validated, a governance action can execute unintended operations. A DAO should clearly separate: Proposal creation Voting Proposal queuing Timelock execution Emergency cancellation Using a timelock gives token holders and security teams

Introduction AI governance is often framed around risk, ethics, safety, and international cooperation. These are essential, but they are not sufficient. Governance only becomes real when countries have the computing infrastructure required to run, monitor, and maintain modern AI systems. Without compute, governance is theory. With compute, governance becomes capability. This article explores the missing execution layer in global AI governance — and why bridging the AI divide requires far more than policy alignment. The Hidden Dependency: Governance Assumes Infrastructure Most governance frameworks implicitly assume that nations already have: access to high performance compute reliable data pipelines secure storage operational tooling energy capacity connectivity skilled operators But this assumption is false for the majority of the world. The global AI divide is not primarily about access to models. It is about access to the infrastructure required to run them. Governance frameworks that ignore this reality risk becoming aspirational rather than actionable. The Execution Layer: Where Policy Meets Reality The execution layer is the part of AI governance that turns policy into practice. It includes: compute infrastructure data ingestion and processing pipelines monitoring and evaluation tooling human in the loop operational workflows maintenance and lifecycle management energy and cooling requirements secure deployment environments This layer is rarely discussed in governance conversations, yet it is the foundation upon which all responsible AI depends. Without an execution layer, governance collapses into paperwork. The Real Global Divide Isn’t About Models — It’s About Compute There is a persistent misconception that the AI divide is about access to large models. In reality, the divide is driven by: insufficient compute unreliable infrastructure lack of operational capacity limited data availability absence of secure environments dependency on external providers A c

I built a web front end for an Nmap-based port scanner: a FastAPI backend, a React dashboard, background scan jobs, a plugin system. It worked. Then I sat down and audited it like an attacker would — and found a stack of real weaknesses, plus a lesson in why you verify an exploit before you call it one. This is the honest version: the holes I found, the unauthenticated-RCE chain I thought I had, why it didn't actually fire, and the hardening I shipped anyway. Repo: https://github.com/DipesThapa/PortScanner This is my own project, audited and fixed by me. No third-party systems were touched. Scanners are dual-use — only ever point one at hosts you own or are authorised to test. Hole 1: no authentication, anywhere The foundation: every API route and the /ws/status WebSocket were open. No API key, no session. The Dockerfile bound 0.0.0.0:8000 and ran as root. Anyone who could reach the port could drive scans, hit the upload endpoint, and read every job's logs. api_router = APIRouter () # no dependencies — fully open This is the real, unambiguous problem. Everything below is only interesting because it sat behind no auth. Hole 2: an upload endpoint that allowlisted its own files Deep-dive follow-up commands ran against an allowlist — good instinct. But an upload endpoint wrote a file, chmod +x 'd it, and then added it to that same allowlist: for item in scripts_dir . glob ( " * " ): if item . is_file (): allowed . add ( str ( item . absolute ())) # upload authorises itself An allowlist any input can extend isn't an allowlist. This is a genuine design footgun. Hole 3: the RCE I thought I had — and why it didn't fire Here's the chain I got excited about: the scan target flows toward Nmap's argv, and it's subprocess.run(..., shell=False) . No shell injection — but you don't need a shell to abuse Nmap. If a target became --script=/uploaded.nse , Nmap would load and run that NSE (Lua) script, and NSE can call os.execute . Upload a malicious .nse (Hole 2), get Nmap to load it

The Torifune asteroid turns out to be shaped like a peanut.

We’ve got another special episode of Decoder today, recorded at the Cannes Lions advertising festival in the South of France. I’m talking with Ali Berman and Raina Penchansky, who run the Creators division at United Talent Agency. UTA is an enormous talent agency. Half the people you’ve ever heard speak or perform or who show […]

In this episode, Alex Zenla (CTO/Co-founder, Edera) challenges the "laissez-faire" attitude toward modern infrastructure. She promotes "spite-driven development", building software to solve genuine technical pain points rather than passively accepting flawed abstractions, as a philosophy of improving the world of software. By Alex Zenla

A new study suggests that when our star becomes unstable in 5 billion years or so, Earth may avoid being engulfed by its fiery demise.

A study based on 47 million galaxies found that the cosmic web retains patterns on enormous scales, which could force a reevaluation of a pillar of cosmology.

In February, city officials in Cheyenne, Wyoming discovered something in their reclaimed water system that shouldn't have been there: Cupriavidus gilardii , a rare metal-resistant bacterium traced to wastewater discharges from Meta's $800 million data center campus. The contamination shut down Cheyenne's reuse water system for months , and on July 2, the city publicly named Meta's construction entity — a shell company called Goat Systems LLC — as the source. 📖 Read the full version with charts and embedded sources on ComputeLeap → "It's a very, very unpleasant surprise," said City Councilman Pete Laybourn. It shouldn't have been a surprise at all. Cheyenne is just the latest community learning what happens when AI's insatiable demand for compute meets the physical world: contaminated water, noise that residents describe as "living in hell," electricity bills that spike 267%, and — in the most surreal twist — a federal government that deleted its own energy conservation pages while a heatwave slammed the eastern seaboard. The AI industry talks endlessly about parameters, benchmarks, and scaling laws. But the story converging across Reddit, Hacker News, X, and YouTube this week isn't about models. It's about watts, gallons, and the communities living next to the machines. The water problem is worse than you think A Brookings Institution analysis puts the numbers in perspective: a typical data center consumes 300,000 gallons of water every day — equivalent to roughly 1,000 households. Large facilities gulp up to 5 million gallons daily, matching the needs of a town of 50,000. And water demand for data center cooling may rise by 870% as the current build-out continues. The scale is hard to overstate. According to a Consumer Reports investigation , Phoenix-area data centers currently use 385 million gallons annually — a figure projected to explode to 3.7 billion gallons once planned facilities come online. About two-thirds of data centers built since 2022 sit in water-st

A tour of the stack behind mattstratton.com and speaking.mattstratton.com: a monorepo holding two Astro sites and a dev.to sync tool, twenty years of blog posts, and the pipeline that crossposts posts like this one.

Before Keurig, the coffee in your office was almost certainly terrible. Old, burned, made by someone who would rather poorly eyeball than properly measure. Just altogether gross. After Keurig? You could make your own coffee, a cup at a time, exactly when you needed it. The single-cup brewer was an elegant solution to an extremely […]

The heat of the Hadean may have come from impacts as well as the interior.

We’ve all been there. You have a "Leg Day" scheduled in your Notion database, but you woke up feeling like a truck hit you. Your Apple Watch says your Heart Rate Variability (HRV) is in the gutter, but your rigid calendar doesn't care. Usually, you’d either push through and risk injury or manually move cards around in Notion—which is a friction-filled nightmare. In this tutorial, we are building a Self-Optimizing Health Agent using LangGraph , Notion API , and HealthKit . This agent acts as a closed-loop system: it analyzes your physiological recovery data, reasons about your physical state using an LLM, and automatically rewrites your training schedule. By mastering AI agents , LLM orchestration , and fitness automation , you’ll turn your static "To-Do" list into a dynamic "Should-Do" list. 🥑 The Architecture: The Bio-Feedback Loop Using LangGraph , we can treat our fitness logic as a state machine. Unlike a linear script, a graph allows our agent to decide whether it needs to fetch more context (like yesterday's sleep) before making a final decision on your workout. graph TD Start((Start)) --> FetchHRV[Fetch HRV Data via HealthKit] FetchHRV --> CheckRecovery{LLM: Analyze Recovery} CheckRecovery -- "Low Recovery (Fatigued)" --> ModifyNotion[Action: Downgrade Workout Intensity] CheckRecovery -- "High Recovery (Fresh)" --> KeepNotion[Action: Maintain/Boost Intensity] ModifyNotion --> UpdateNotion[Update Notion Page] KeepNotion --> UpdateNotion UpdateNotion --> End((Done)) style CheckRecovery fill:#f96,stroke:#333,stroke-width:2px style FetchHRV fill:#bbf,stroke:#333 Prerequisites Before we dive into the code, ensure you have: Python 3.10+ LangChain & LangGraph installed ( pip install langgraph langchain_openai ) Notion Integration Token (with access to your workout database) HealthKit SDK (Note: Since we are in a Python environment, we'll simulate the HealthKit fetcher, though in a real-world scenario, this would be bridged via a FastAPI endpoint from an iOS app). St