action.yml

name: ScreenshotMAX Capture
description: Call ScreenshotMAX API with HMAC signature and save the result if successful.
author: screenshotmax.com
inputs:
  access_key:
    description: 'Your ScreenshotMAX API access key'
    required: true
  secret_key:
    description: 'Your ScreenshotMAX API secret key'
    required: true
  querystring:
    description: 'Your querystring (e.g. url=https://example.com&format=png)'
    required: true
runs:
  using: "composite"
  steps:
    - shell: bash
      run: |
        echo "Generating signature and calling ScreenshotMAX API..."

        # Extract parameters
        ACCESS_KEY="${{ inputs.access_key }}"
        SECRET_KEY="${{ inputs.secret_key }}"
        QS="${{ inputs.querystring }}"
        FORMAT=$(echo "$QS" | grep -oE 'format=([^&]+)' | cut -d= -f2)
        FILE_NAME="output.${FORMAT:-png}"

        # Create payload: raw string (access_key + querystring)
        QS_STRING="access_key=${ACCESS_KEY}&${QS}"

        # Generate HMAC-SHA256 signature
        SIGNATURE=$(printf '%s' "$QS_STRING" | openssl dgst -sha256 -hmac "$SECRET_KEY" | sed 's/^.* //')

        echo "Signature generated."

        # Perform GET request with signed query
        http_code=$(curl -s -w "%{http_code}" -o response.bin -G "https://api.screenshotmax.com/v1/screenshot" \
          --data-urlencode "$QS_STRING" \
          --data-urlencode "signature=$SIGNATURE")

        echo "HTTP code: $http_code"

        if [ "$http_code" -eq 200 ]; then
          mv response.bin "$FILE_NAME"
          echo "Screenshot saved as $FILE_NAME"
        else
          echo "API call failed with HTTP $http_code"
          cat response.bin
          exit 1
        fi

        echo "file_name=$FILE_NAME" >> "$GITHUB_OUTPUT"