The punycode module is deprecated.

[pfloretz]

I started to get these errors when I upgraded Node to 21.1.0.

It does not affect functionality, but is an annoyance. I can downgrade back to 20.9 for now, but I am curious if changes will be made to address this.

Thank you for httpyac command line, it's a great tool.

[AnWeber]

I myself do not use punycode directly. One of my dependencies is to blame.

(node:16278) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
    at node:punycode:3:9
    at BuiltinModule.compileForInternalLoader (node:internal/bootstrap/realm:392:7)
    at BuiltinModule.compileForPublicLoader (node:internal/bootstrap/realm:328:10)
    at loadBuiltinModule (node:internal/modules/helpers:101:7)
    at Module._load (node:internal/modules/cjs/loader:1001:17)
    at Module.require (node:internal/modules/cjs/loader:1235:19)
    at require (node:internal/modules/helpers:176:18)
    at Object.<anonymous> (/home/andreas/github/httpyac/httpyac/node_modules/psl/index.js:5:16)
    at Module._compile (node:internal/modules/cjs/loader:1376:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1435:10)

psl appears to be a guilty party. This dependency is loaded with module tough-cookie, which uses npm packge punycode. created a pr which resolves issue, but the repo is not really active. Maybe we are lucky

[AnWeber]

@pfloretz My guess is that psl will no longer be updated and will no longer work with node >21. Tough-cockie's plan is to sit it out and run into the problem unexpectedly with the next LTS.
My plan is similar right now. I'm now waiting to see if tough-cookie changes his mind due to usage in other large projects which got the same error (e.g. jsdom, cypress). Until then, I can only offer you the workaround of enabling --no-deprecation and suppressing the warning.

node --no-deprecation /home/.../node_modules/httpyac/bin/httpyac.js send headers.http