http: add IPv6 range support for NO_PROXY environment variable

[haramj]

This PR resolves the // TODO(joyeecheung): support IPv6. comment in internal/http.js by adding comprehensive support for IPv6 address ranges to the NO_PROXY environment variable.

Previously, the ProxyConfig class's shouldUseProxy method could only handle IPv4 address ranges. With this change, users can now specify IPv6 ranges (e.g., ::1-::100) to correctly bypass proxies for hosts within those ranges.

The implementation involves:

• A new helper function ipv6ToBigInt to convert 128-bit IPv6 addresses into BigInts for reliable numerical comparison.
• Updated shouldUseProxy logic to check if a host is within a given IPv6 range.

This update ensures the proxy bypass feature is robust and consistent with both IPv4 and IPv6 network standards.

New test cases have been added to test/client-proxy/test-http-proxy-request-no-proxy-ipv6.mjs to verify the new functionality.

Test

• A host within the specified IPv6 range (::1-::100) correctly bypasses the proxy.
• A host outside the specified IPv6 range correctly uses the proxy.

This ensures that the new feature works as expected and does not introduce regressions to existing functionality.

/cc @joyeecheung

[nodejs-github-bot]

Review requested:

• @nodejs/http
• @nodejs/net

[codecov]

Codecov Report

❌ Patch coverage is 89.74359% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.15%. Comparing base (b2a024b) to head (e6bf6c6).

Files with missing lines	Patch %	Lines
lib/internal/http.js	89.74%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #59950      +/-   ##
==========================================
- Coverage   90.15%   90.15%   -0.01%     
==========================================
  Files         744      744              
  Lines      242542   242577      +35     
  Branches    45690    45700      +10     
==========================================
+ Hits       218672   218697      +25     
- Misses      15362    15370       +8     
- Partials     8508     8510       +2     

Files with missing lines	Coverage Δ
lib/internal/http.js	91.92% <89.74%> (-0.41%)	⬇️

... and 25 files with indirect coverage changes

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[github-actions]

This pull request has been marked as stale due to 90 days of inactivity.
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[trivikr]

@haramj Can you please rebase, sign the first commit and force push?

It's required as per updated instructions

Your commit must contain the Signed-off-by line with your name and email address as an acknowledgement that you agree to the Developer Certificate of Origin

[haramj]

@haramj Can you please rebase, sign the first commit and force push?

It's required as per updated instructions

Your commit must contain the Signed-off-by line with your name and email address as an acknowledgement that you agree to the Developer Certificate of Origin

Thanks! I’ve rebased the branch onto the latest main and added the required Signed-off-by line to both commits.

[haramj]

@trivikr It looks like the failing test is unrelated to this change (parallel/test-repl-use-global failed with ERR_INSPECTOR_COMMAND in the BoringSSL shared-library job). Could someone please rerun the failed job?