Fix: Use explicit IPv4 for local connection to avoid DNS hangs#21
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… IPv6 resolution hang - Set explicit 127.0.0.1 (IPv4) host when not provided. - Added tests to verify constructor defaults.
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Description
This PR changes the default local connection string from
localhostto127.0.0.1.Why this approach?
Starting in Node.js 17+, the DNS resolution behavior changed to "Happy Eyeballs", which often resolves
localhostto the IPv6 loopback (::1) first. Because local Ollama instances typically only listen on the IPv4 loopback (127.0.0.1), this causes Node.js connection attempts to hang or fail until the IPv6 attempt times out.By explicitly setting the default host to
127.0.0.1, we bypass DNS resolution entirely, ensuring immediate and reliable connections to the local Ollama daemon across all Node environments.Resolves #15