jckw

API Reverse Engineering with Playwriter

A reusable technique for intercepting, analyzing, and replaying private API calls from any web app using playwriter.

Overview

Instead of scraping DOM or taking screenshots, this approach:

1. Sets up network interception to capture outgoing API requests
2. Triggers the UI action that fires the request
3. Inspects the response to understand the schema and pagination

jckw

#!/bin/bash
#
# gfix - Open a PR branch in a new git worktree with Cursor
#
# This script makes it easy to work on PRs in isolated worktrees without
# switching branches or stashing changes in your main working directory.
# Each PR gets its own directory under .worktrees/ that you can work in
# independently.
#
# REQUIREMENTS:

jckw

class Saga<TContext> {
  private operations: Array<{
    up: (context: any) => Promise<any>
    down: (context: any) => Promise<void>
  }> = []

  add<TNewContext>(
    up: (context: TContext) => Promise<TNewContext>,
    down: (context: Partial<TContext & TNewContext>) => Promise<void>
  ): Saga<TContext & TNewContext> {

jckw

terraform {
  required_providers {
    google-beta = {
      source  = "hashicorp/google-beta"
      version = "5.15.0"
    }
  }
}

variable "project_id" {

jckw

#!/bin/bash

# @author: github.com/jckw
# @dependencies:
# - sox (brew install sox)

# Define constants
TMP_FILE="/tmp/openai_recording.mp3"
OPENAI_KEY="YOUR_OPENAI_API_KEY"

jckw

import { useActor, useInterpret } from "@xstate/react"
import { assign, createMachine, InterpreterFrom } from "xstate"
import { createContext, useContext, useEffect, ReactNode } from "react"
import apiClient from "@/api/client"
import { useRouter } from "next/router"
import { useToast } from "@chakra-ui/react"

// Warning, if you are altering this machine, you will probably need to manually refresh
// the page. Because it is defined outside of React, it will not hot reload.
const authMachine = createMachine(

jckw

import cartesian from "fast-cartesian"

type ArrayToUnion<T extends readonly unknown[]> = T[number]

type ObjectValuesToUnion<T extends Record<string, readonly unknown[]>> = {
  [K in keyof T]: ArrayToUnion<T[K]>
}

const namedCartesian = <T extends Record<string, readonly unknown[]>>(
  fields: T,

jckw

name: Create iOS and Android beta builds
on: [workflow_dispatch]

jobs:
  safety-checks:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2

    - name: Use Node@16

jckw

name: Create iOS and Android beta builds
on: [workflow_dispatch]

jobs:
  safety-checks:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2

    - name: Use Node@16

jckw

FROM node:16-bullseye-slim as base

WORKDIR /remix
ENV NODE_ENV production

# 1.1 Install node_modules for build
FROM base as build-deps

WORKDIR /remix
ADD package.json yarn.lock ./