When performing network operations in build scripts or containers, prefer curl over wget for HTTP requests to standardize dependencies and improve portability. Use the specific flags -fsSL for silent operation with proper error handling, and explicitly specify output destinations.
Additionally, ensure network services support both IPv4 and IPv6 addressing by using dual-stack binding configurations rather than binding only to 0.0.0.0 (IPv4).
Example replacing wget with curl:
# Instead of:
wget -q -O- https://example.com/file.tar.gz | tar xz
# Use:
curl -fsSL https://example.com/file.tar.gz | tar xz
Example of dual-stack binding in gunicorn:
# Instead of:
gunicorn -w 3 --bind 0.0.0.0:5000 app:app
# Use:
gunicorn -w 3 --bind 0.0.0.0:5000 --bind [::]:5000 app:app
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