fix: restore default axios request headers

[j4ln]

Description

• Commit ca0412b replaced the axios instance's defaults.headers.common object entirely. This inadvertently removed the default Accept header from axios.
• Fix by assigning the User-Agent header as an additional property to the existing common headers rather than replacing it. This preserves the axios defaults.

Fixes #7819.

Contribution Checklist:

• I've used AI significantly to create this pull request
• The pull request only addresses one issue or adds one feature.
• The pull request does not introduce any breaking changes
• I have added screenshots or gifs to help explain the change if applicable.
• I have read the contribution guidelines.
• Create an issue and link to the pull request.

Summary by CodeRabbit

• Bug Fixes

  • Preserve existing default HTTP headers when configuring requests and ensure a consistent bruno-runtime User-Agent is added without removing other defaults (e.g., Accept).

• Tests

  • Added unit and integration tests plus an HTTP request check to validate that Accept remains present and User-Agent is set as expected.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 383edfa9-5f38-41db-92cd-9fb7b2fda0b0

📥 Commits

Reviewing files that changed from the base of the PR and between 38de3f6 and bb1ccda.

📒 Files selected for processing (5)

• packages/bruno-cli/src/utils/axios-instance.js
• packages/bruno-cli/tests/utils/axios-instance.spec.js
• packages/bruno-electron/src/ipc/network/axios-instance.js
• packages/bruno-electron/tests/network/axios-instance.spec.js
• packages/bruno-tests/collection/echo/echo default request headers.bru

✅ Files skipped from review due to trivial changes (3)

• packages/bruno-electron/src/ipc/network/axios-instance.js
• packages/bruno-cli/src/utils/axios-instance.js
• packages/bruno-cli/tests/utils/axios-instance.spec.js

🚧 Files skipped from review as they are similar to previous changes (2)

• packages/bruno-tests/collection/echo/echo default request headers.bru
• packages/bruno-electron/tests/network/axios-instance.spec.js

---

Walkthrough

Changed Axios instance initialization to set User-Agent by mutating instance.defaults.headers.common['User-Agent'] instead of replacing the entire common headers object; added tests (Jest + collection) asserting the default Accept header is preserved and User-Agent is set to bruno-runtime/....

Changes

Cohort / File(s)	Summary
Axios Instance Header Configuration packages/bruno-cli/src/utils/axios-instance.js, packages/bruno-electron/src/ipc/network/axios-instance.js	Set runtime User-Agent by mutating instance.defaults.headers.common['User-Agent'] instead of replacing instance.defaults.headers.common, preserving existing default headers (notably Accept).
Header Default Tests packages/bruno-electron/tests/network/axios-instance.spec.js, packages/bruno-cli/tests/utils/axios-instance.spec.js, packages/bruno-tests/collection/echo/echo default request headers.bru	Add tests that assert outgoing requests retain Axios’s default Accept header (application/json present) and include User-Agent with bruno-runtime/... prefix.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• fix: allow user to delete default bruno headers in pre-request #7331 — Modifies makeAxiosInstance’s header handling to mutate defaults.headers.common instead of replacing it.
• fix cookies not being set when follow redirect = false #6679 — Related changes touching the same makeAxiosInstance implementations (redirect/cookie/followRedirects and header handling).

Suggested reviewers

• helloanoop
• lohit-bruno
• naman-bruno
• bijin-bruno

Poem

Headers hum a quieter tune,
Accept stays steady, User-Agent in tune,
A tiny tweak, a stable line,
Requests now travel, intact, resigned,
Small change — smoother runtime.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	Title accurately describes the main fix: restoring default axios request headers by preserving the Accept header.
Linked Issues check	✅ Passed	PR directly addresses #7819 by restoring the missing Accept header through proper header mutation instead of replacement.
Out of Scope Changes check	✅ Passed	All changes are in-scope: axios instance fixes in CLI and Electron, corresponding test coverage, and integration test for header verification.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@packages/bruno-cli/src/utils/axios-instance.js`:
- Line 96: The CLI axios instance sets default headers
(instance.defaults.headers.common['User-Agent'] and the default Accept header)
but lacks test coverage; add a unit test mirroring the Electron tests that loads
the CLI axios instance module and asserts the default 'User-Agent' equals
`bruno-runtime/${CLI_VERSION}` and that the default 'Accept' header is
present/expected. Create or update a test file (e.g., bruno-cli tests under
tests/network/axios-instance.spec.js) to import the axios-instance module used
in packages/bruno-cli/src/utils/axios-instance.js, and add assertions for
instance.defaults.headers.common['User-Agent'] and
instance.defaults.headers.common['Accept'] to ensure parity with the Electron
test suite.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 1a780940-290c-41d2-88c1-d4139a1d951e

📥 Commits

Reviewing files that changed from the base of the PR and between c4dc0bc and 6f9bc08.

📒 Files selected for processing (3)

• packages/bruno-cli/src/utils/axios-instance.js
• packages/bruno-electron/src/ipc/network/axios-instance.js
• packages/bruno-electron/tests/network/axios-instance.spec.js

[Pragadesh44-Bruno]

Hey @j4ln, thanks for your contribution to this PR. Could you please review and merge the PR I have raised here: j4ln#1?

I’ve slightly updated your tests, consolidated your commits into one, and added proper comments. Let me know if you have any doubts. Please merge it and let me know so I can pass it to the team for review.

[j4ln]

Hey @Pragadesh44-Bruno thanks for the review. I've merged those changes in now. I've re consolidated the commits into a single one and rebased against main.