#9268 TEXT body should interpolate variables

[Kanaduchi]

BRU-4556

TEXT body with Content-Type: application/x-www-form-urlencoded should interpolate variables

Problem

When a request uses Body type TEXT and the header Content-Type: application/x-www-form-urlencoded, variables in the body stay as literal {{var}} at send time.

The editor highlights them as resolved, and the URL interpolates correctly. Timeline shows the body was sent unresolved.

This is a possible regression of #2400 (closed as fixed in v1.35).

Root cause: urlencoded interpolation only runs when request.data is an array (Form URL Encoded fields). TEXT body is a string, so that branch does nothing. URL uses a different path, so it still interpolates.

Fix

Add interpolation if request.data is string

Screenshots

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After:

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.
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• Create an issue and link to the pull request.
• I've run the claude code review skill locally.

Summary by CodeRabbit

• Bug Fixes

  • Fixed variable interpolation for text-based application/x-www-form-urlencoded request bodies.
  • Ensured variables resolve correctly in URLs and form fields using environment or request-level variables.
  • Preserved form field names, enabled states, and values when interpolating array-based form data.

• Tests

  • Added coverage for text and array-based form-urlencoded requests.

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ℹ️ Recent review info

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Run ID: d56ce3fd-6dab-4fa8-948a-d32d5013ff72

📥 Commits

Reviewing files that changed from the base of the PR and between f6714f2 and 435e75a.

📒 Files selected for processing (4)

• packages/bruno-cli/src/runner/interpolate-vars.js
• packages/bruno-cli/tests/runner/interpolate-vars.spec.js
• packages/bruno-electron/src/ipc/network/interpolate-vars.js
• packages/bruno-electron/tests/network/interpolate-vars.spec.js

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Walkthrough

The change adds explicit interpolation for string form-urlencoded bodies in the CLI path and adds equivalent explicit handling in the Electron path. Tests cover environment variables, request-level global variables, and array-based form fields.

Changes

Form-urlencoded interpolation

Layer / File(s)	Summary
Interpolation handling and coverage packages/bruno-cli/src/runner/interpolate-vars.js, packages/bruno-cli/tests/runner/interpolate-vars.spec.js, packages/bruno-electron/src/ipc/network/interpolate-vars.js, packages/bruno-electron/tests/network/interpolate-vars.spec.js	The CLI path interpolates string form-urlencoded bodies. The Electron path adds an explicit string branch with unchanged observable behavior. Tests cover URL and body variables from both environment sources, plus array-based fields with preserved names and enabled flags.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 945b5

Form-urlencoded text bodies retain variable interpolation across the CLI and Electron paths, with no actionable merge risk identified.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 4…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: variable interpolation for TEXT request bodies. It is specific and directly related to the pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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_{Form fields wake in a string of light
URL tokens resolve just right
Global values join the flow
Enabled flags stay in tow
Tests record the polished route}

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