gen_test_images

Test Image Generator

This command generates and uploads test images for all test ads (ads with user_id = 1) to B2 storage.

Features

• Simple Image Generation: Creates images with a random background color and centered text showing:
  • Ad ID
  • Image number
  • Image dimensions
• Multiple Sizes: Generates images in three sizes (160w, 480w, 1200w) for responsive display
• WebP Format: Uses WebP encoding for optimal compression and faster uploads
• Batch Upload: Uploads all images to B2 in parallel batches for efficiency
• Progress Tracking: Shows upload progress every 50 successful uploads

Usage

cd cmd/gen_test_images
go run main.go

Requirements

• B2 credentials must be set in environment variables:
  • B2_MASTER_KEY_ID
  • B2_KEY_ID
  • B2_APP_KEY
  • B2_BUCKET_NAME

Image Structure

Images are organized in B2 as:

{ad_id}/{image_number}-{size}.webp

For example:

• 23/1-160w.webp - Ad 23, Image 1, 160px width
• 23/1-480w.webp - Ad 23, Image 1, 480px width
• 23/1-1200w.webp - Ad 23, Image 1, 1200px width
• 23/2-160w.webp - Ad 23, Image 2, 160px width
• etc.

Performance

• Processes all test ads in the database
• Generates 1-5 images per ad (based on image_count field)
• Creates 3 sizes per image (160w, 480w, 1200w)
• Uploads in batches of 10 concurrent uploads
• Uses WebP compression for optimal file sizes

Example Output

Found 1000 test ads to process
Generated 15000 images to upload
Starting batch upload of 15000 images with batch size 10
Uploaded 50/15000 images
Uploaded 100/15000 images
...
Upload complete: 15000 successful, 0 failed
Test image generation and upload complete!