README for lgGOMT.go

Overview

lgGOMT.go is a Go (Golang) automation script using the Playwright framework to interact with a website (http://www.lg4all.com/pod). The script is designed to perform browser automation tasks for multiple codes in parallel. Each code triggers a new browser session that automates various webpage interactions, such as navigation, handling dialogs, checking checkboxes, collecting messages, and extracting data.

This architecture ensures your Go applications run reliably while minimizing EC2 costs by keeping instances active only when needed.

Features

• Parallel Automation:
  Executes multiple browser automation tasks concurrently using Go's goroutines.

• Headless and Non-Headless Modes:
  Runs Chromium with options to disable headless mode for visual debugging or automated runs.

• Robust Browser Interactions:

  • Navigates to code-specific URLs.
  • Handles browser dialogs automatically.
  • Detects specific page conditions (like "No Record Found").
  • Selects checkboxes and attempts to submit forms.
  • Extracts text from specific elements if available.

Prerequisites

• Go 1.18+
• Playwright-Go library
  Install with:

  go get github.com/playwright-community/playwright-go

• Playwright Browsers
  Install Playwright browsers if not already present:

  playwright install

• Chromium Browser (handled by Playwright install)
• Internet Connection (for website access)

How It Works

1. Code List:
   The script defines a list of code strings. Each code triggers a separate browser automation routine.

2. Parallel Execution:
   For every code in the list, a goroutine is launched via runAutomation, managed by a sync.WaitGroup for synchronization.

3. Browser Automation:
   Each goroutine:

   • Launches a new Chromium browser with specific flags for resource efficiency and sandboxing.
   • Navigates to the URL built from the code.
   • Handles unexpected dialogs automatically.
   • Checks for a "No Record Found" message and exits early if found.
   • Checks/unchecks checkboxes as needed and attempts to submit results.
   • Extracts and logs the "No Of Bid" value from a specific element if present.

4. Graceful Shutdown:
   Browsers and Playwright are stopped using deferred functions to ensure resources are always cleaned.

Usage

1. Edit codes Array:
   Replace the hardcoded codes with your own list of identifiers to automate against.

2. Compile and Run:

   go mod tidy               # Install dependencies
   go run lgGOMT.go

   Or compile and run separately:

   go build -o lgGOMT
   ./lgGOMT

3. View Output:
   Log outputs will be printed to the console, showing action status and any data extracted.

Key Configuration Points

• Headless Mode:
  To run browsers without UI for speed, set Headless: playwright.Bool(true) in the browser launch options.

• Concurrency:
  The script launches one goroutine per code in the list. Adjust the codes list to match system resource constraints.

• Error Handling:
  The script uses fatal logs on most errors, which means a single error in a goroutine can terminate the entire program. Consider refactoring to handle errors gracefully if needed for production use.

Example Output

Alert text: <Dialog message>
NoOfBid element not found on the page.
Submit button clicked.
No Of Bid Text: <value>
No Record Found message. Exiting.

Troubleshooting

• Missing Dependencies:
  Ensure Playwright and the Playwright-Go bindings are installed.
• Resource Usage:
  Launching many browsers in parallel may require tuning based on your server's CPU/memory capacity.
• Firewall/Network Issues:
  Make sure the automated browser can access external web resources.

Customization

To use the script with different URLs, element selectors, or workflows, edit the relevant sections in runAutomation.

Performance Tips

• Adjust Concurrency: Monitor system resources and adjust the number of concurrent browser instances based on your server's capacity.
• Use Headless Mode: For production runs, enable headless mode to reduce resource consumption.
• Optimize Wait Times: Fine-tune wait times and timeouts for better performance.

License

This project is provided as-is for educational and automation purposes.

Note:
Always review automated browser usage policies and site terms to ensure compliance before running scripts against third-party websites.