feat(http): format, copy and mock the response preview by erkamyaman · Pull Request #271 · pangular-inspector/devtools

erkamyaman · 2026-10-10T23:18:15Z

What and why

The HTTP timeline's response preview on the SSR & HTTP page showed JSON on one long line and gave no way to reuse a body.

A JSON preview is indented by 2 spaces. Numbers and strings are kept as written, so large ids keep every digit. Plain text and clipped bodies show as recorded. Only the already redacted preview is formatted.
Copy puts the shown preview on the clipboard and reports "Copied." or "The clipboard is not available here." in the polite toolbar status. Its accessible name is "Copy the response of GET /api/x".
Mock this request fills the existing fault rule form with the call's method, its path and query as the URL pattern (no origin, so it matches client and SSR URLs; redacted values become *), and the preview as the mock body when it is complete JSON. Focus moves to URL pattern. Nothing is saved until Add rule. No new RPC or rule shape; it goes through set-http-rules as before. The button is disabled with the existing explanation when the http write action is off.
Docs: inspectors/ssr-http.md and guides/ssr-http.md.

How it was verified

pnpm format:check
pnpm typecheck (no TS or NG errors)
pnpm test:panel (30 files, 174 tests), including the new network-response-preview.test.ts (7 tests) and prettyJson tests (3)
pnpm docs:build
pnpm extension:build, bundle committed
axe on the SSR & HTTP view with seeded HTTP calls (preview open, rule form filled, error preview), dark and light, 1280px and 360px: 0 violations in 12 runs, no horizontal overflow, focus lands on URL pattern. pnpm test:axe could not launch its pinned Chromium, so this ran against the installed Chromium 1194 with the same axe setup
pnpm commit:check

Screenshots

None attached.

Notes for reviewers

This touches app/src/pages/network-inspector.ts, as do feat(http): add search, side and failed-only filters to the HTTP timeline #270 (timeline filters) and the TransferState key branch, so a small merge may be needed after those land.
methodOptions is now a computed so the dropdown can show a method that is not in the usual list (for example HEAD) after Mock this request.
The mock body comes from the redacted preview, so masked values stay masked in the rule. Previews over 2000 characters are clipped upstream and are not used as a body; in that case only the method and URL are filled and the status line says so.

Generated by Claude Code

Summary by CodeRabbit

New Features
- HTTP response previews now format valid JSON for easier reading and can be copied to the clipboard.
- Use Mock this request on a recorded HTTP call to prefill a fault rule’s method and URL pattern. Complete JSON responses can also populate the mock body; redacted URL values are replaced with *.
- The mock-rule form focuses the URL field when opened and preserves recorded methods that aren’t among the standard options.
- Fault rules now accept hyphenated HTTP methods, such as M-SEARCH.
Documentation
- Updated HTTP inspector guides to explain response previews and how to create mock rules from recorded calls.

The HTTP timeline preview showed JSON bodies on one long line and gave no way to reuse them. A JSON preview is now indented by 2 spaces, with numbers and strings copied as written. Other text and clipped bodies show as recorded. Only the redacted preview is formatted. Copy puts the shown preview on the clipboard and reports the result in the toolbar status. Mock this request fills in the fault rule form with the call's method, its path and query as the URL pattern (redacted values become *), and the preview as the body when it is complete JSON. Focus moves to the URL pattern and nothing is saved until Add rule. It uses the existing set-http-rules flow and rule shape. The rebuilt extension/ui bundle is included.

coderabbitai · 2026-10-10T23:18:32Z

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⛔ Files ignored due to path filters (1)

extension/ui/assets/index-MV8943FE.js is excluded by !**/assets/index-[0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-].js

📒 Files selected for processing (4)

app/src/pages/network-inspector.ts
apps/docs/src/content/inspectors/ssr-http.md
extension/ui/assets/browser-agent-rpc-BXhoSh1z-CR4wGNfZ.js
extension/ui/index.html

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📒 Files selected for processing (2)

packages/devtools/src/__tests__/http.test.ts
packages/devtools/src/http-rules.ts

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📝 Walkthrough

Walkthrough

The HTTP inspector now formats and copies response previews and can populate a fault-rule draft from a recorded request. The changes also update HTTP method sanitization to accept hyphenated methods. Tests and documentation cover the preview and mock actions, and UI asset references point to the updated bundle.

Changes

HTTP preview and mock workflow

Layer / File(s)	Summary
JSON preview formatting `app/src/format.ts`, `app/src/__tests__/format.test.ts`	Adds `prettyJson` for JSON objects and arrays. The formatter adds two-space indentation while preserving number and string text. Tests cover formatting and inputs that return `null`.
Preview actions and fault-rule population `app/src/pages/network-inspector.ts`, `app/src/__tests__/network-response-preview.test.ts`, `apps/docs/src/content/guides/ssr-http.md`, `apps/docs/src/content/inspectors/ssr-http.md`, `extension/ui/assets/browser-agent-rpc-BXhoSh1z-BeppHGOP.js`, `extension/ui/index.html`	The inspector formats previews, supports copying, and can populate an unsaved fault-rule draft from a request. Tests and documentation cover these actions. UI asset references use the updated bundle path.

HTTP method validation

Layer / File(s)	Summary
Sanitize hyphenated HTTP methods `packages/devtools/src/http-rules.ts`, `packages/devtools/src/__tests__/http.test.ts`	Method sanitization accepts uppercase letters and hyphens. Tests check that `m-search` is normalized to `M-SEARCH` and `-GET` is rejected.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  actor User
  participant NetworkInspector
  participant FaultRuleForm
  User->>NetworkInspector: Select Mock this request
  NetworkInspector->>FaultRuleForm: Set method, URL pattern, and eligible JSON body
  NetworkInspector->>FaultRuleForm: Focus URL pattern

Merge Risk: ⚪ Minimal · up to cb624

No supported regression is established in the supplied evidence, so no specific merge-blocking concern remains.

Architecture Summary

Architecture risk: 🔵 Low · up to cb624

The change affects 4 systems.

Changed systems: packages/devtools, app, apps/docs, extension

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

observed — packages/devtools (library) was modified; 2 changed files map to changed impact.
observed — app (service) was modified; 4 changed files map to changed impact.
observed — apps/docs (service) was modified; 2 changed files map to changed impact.
observed — extension (ui) was modified; 2 changed files map to changed impact.

Before / after behavior

observed — Modified behavior in app/src/tests/format.test.ts: The test file now imports prettyJson alongside time.
observed — Modified behavior in app/src/tests/format.test.ts: Adds prettyJson tests for JSON-style two-space indentation, preserving numeric and escape representations, and returning null for text, clipped JSON, and bare values.
observed — Modified behavior in app/src/tests/network-response-preview.test.ts: Added shared test setup that creates a NetworkInspector fixture with a configurable network call, opens its preview, and exposes preview controls and status; each test destroys the fixture and resets the testing module.
observed — Modified behavior in app/src/tests/network-response-preview.test.ts: Added expectations that JSON previews are indented by two spaces and non-JSON preview text is shown unchanged.

Pre-merge checks | 4 | 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 36.36% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 7 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main changes: formatting, copying, and mocking HTTP response previews.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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cloudflare-workers-and-pages · 2026-10-10T23:18:58Z

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Build: Failed ❌ View logs ↗		`9903fe1`	2026-10-10T23:18:52.270Z	View logs ↗

erkamyaman · 2026-10-10T23:18:59Z

The "Workers Builds: angular-devtools" check fails here the same way it fails on every open PR right now (#244 to #270 included), including PRs that do not touch the docs site. Its logs are only on the Cloudflare dashboard, so the cause can't be seen or fixed from this branch. The repo's own checks for this change (format, typecheck, panel tests, docs build, extension build, commit check) pass locally.

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Inline comments:
Review comments at @app/src/pages/network-inspector.ts:
- Line 2144: Update the method validation in sanitizeRules, used by the
set-http-rules path, to accept valid HTTP method tokens including hyphens so
mockCall can save methods such as M-SEARCH without converting them to undefined;
preserve rejection of invalid method values.

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extension/ui/assets/index-BELKFkIj.js is excluded by !**/assets/index-[0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-].js

📒 Files selected for processing (8)

app/src/__tests__/format.test.ts
app/src/__tests__/network-response-preview.test.ts
app/src/format.ts
app/src/pages/network-inspector.ts
apps/docs/src/content/guides/ssr-http.md
apps/docs/src/content/inspectors/ssr-http.md
extension/ui/assets/browser-agent-rpc-BXhoSh1z-BeppHGOP.js
extension/ui/index.html

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The rule sanitizer only kept methods made of letters, so a rule created with Mock this request for an M-SEARCH call lost its method and matched every method at that URL. Methods may now contain hyphens after the first letter.

# Conflicts: # apps/docs/src/content/inspectors/ssr-http.md # extension/ui/assets/browser-agent-rpc-BXhoSh1z-BeppHGOP.js # extension/ui/assets/browser-agent-rpc-BXhoSh1z-BmQUJzPK.js # extension/ui/assets/browser-agent-rpc-BXhoSh1z-C_twCiPD.js # extension/ui/assets/index-BELKFkIj.js # extension/ui/assets/index-BEfrZ0QX.js # extension/ui/assets/index-P5BRTFHt.js # extension/ui/index.html

erkamyaman requested a review from santoshyadavdev as a code owner October 10, 2026 23:18

github-actions Bot added area: panel The devtools panel app (app/) area: extension The Chrome extension area: docs The documentation site labels Oct 10, 2026

This was referenced Oct 10, 2026

feat(forms): open the field from an error summary entry #272

Merged

feat(http): show TransferState keys and edit an entry in SSR overrides #273

Merged

coderabbitai Bot reviewed Oct 10, 2026

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Comment thread app/src/pages/network-inspector.ts

github-actions Bot added the area: package The ng-devtools package (packages/ng-devtools) label Oct 10, 2026

erkamyaman merged commit fe020e9 into main Oct 11, 2026
1 check passed

erkamyaman deleted the http/response-preview branch October 11, 2026 02:05

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feat(http): format, copy and mock the response preview - #271

feat(http): format, copy and mock the response preview#271
erkamyaman merged 3 commits into
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http/response-preview

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