expr: add HTTP helpers

[blotus]

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[github-actions]

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• /kind feature
• /kind enhancement
• /kind refactoring
• /kind fix
• /kind chore
• /kind dependencies

Details

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[github-actions]

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• /area agent
• /area local-api
• /area cscli
• /area appsec
• /area security
• /area configuration

Details

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[codecov]

Codecov Report

❌ Patch coverage is 65.62500% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.08%. Comparing base (4e57efb) to head (be1989a).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/exprhelpers/http.go	65.62%	11 Missing and 11 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4533       +/-   ##
===========================================
+ Coverage   37.57%   64.08%   +26.51%     
===========================================
  Files         460      479       +19     
  Lines       33569    34369      +800     
===========================================
+ Hits        12614    22026     +9412     
+ Misses      19595    10167     -9428     
- Partials     1360     2176      +816     

Flag	Coverage Δ
bats	46.37% <0.00%> (?)
unit-linux	37.63% <65.62%> (+0.06%)	⬆️
unit-windows	26.80% <65.62%> (?)

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[blotus]

/kind enhancement

[Copilot]

Pull request overview

This PR adds outbound HTTP helper functions to the pkg/exprhelpers expression library so expressions can make basic HTTP requests and inspect response status/body/headers.

Changes:

• Introduces HTTPGet, HTTPHead, HTTPPost, and HTTPRequest helpers backed by a shared http.Client (timeout + default User-Agent injection).
• Adds unit tests validating the helpers and a basic expr integration test.
• Registers the new helpers in pkg/exprhelpers/expr_lib.go so they’re available to GetExprOptions(...).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
pkg/exprhelpers/http.go	Adds HTTP client + request helpers and HTTPResponse type exposed to expr.
pkg/exprhelpers/http_test.go	Adds tests for the new HTTP helpers and an expr integration test.
pkg/exprhelpers/expr_lib.go	Registers the new HTTP helpers in the expr function list.

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[sabban]

lgtm

[sabban]

lgtm