Double the hardcoded max http header count

[alii]

What does this PR do?

Doubles the hardcoded max http header count

How did you verify your code works?

ci (?)

[robobun]

^{Updated 10:55 PM PT - Jan 14th, 2026}

❌ @autofix-ci[bot], your commit 67e03ff has 3 failures in Build #34928 (All Failures):

• test/integration/next-pages/test/dev-server.test.ts - 1 failing on 🍎 13 aarch64
• test/regression/issue/11297/11297.test.ts - 1 failing on 🪟 2019 x64-baseline
• test/js/bun/test/parallel/test-http-should-emit-close-when-connection-is-aborted.ts - timeout on 🪟 2019 x64-baseline
• test/js/bun/test/parallel/test-http-should-emit-close-when-connection-is-aborted.ts - timeout on 🪟 2019 x64

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bunx bun-pr 26130

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[coderabbitai]

Walkthrough

This pull request increases the maximum HTTP header count in UWS from 100 to 200 and reorganizes imports in a test file by moving the HttpsProxyAgent import earlier without changing functionality.

Changes

Cohort / File(s)	Summary
HTTP Header Limit Configuration packages/bun-uws/src/HttpParser.h	Increased UWS_HTTP_MAX_HEADERS_COUNT macro from 100 to 200
Test Import Organization test/js/node/http/node-http-agent-tls-options.test.mts	Relocated HttpsProxyAgent import to earlier position in file for improved organization

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Double the hardcoded max http header count' accurately and specifically describes the main change: increasing UWS_HTTP_MAX_HEADERS_COUNT from 100 to 200.
Description check	✅ Passed	The PR description follows the required template structure with both 'What does this PR do?' and 'How did you verify your code works?' sections, though verification details are vague.

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📥 Commits

Reviewing files that changed from the base of the PR and between ed75a0e and 67e03ff.

📒 Files selected for processing (2)

• packages/bun-uws/src/HttpParser.h
• test/js/node/http/node-http-agent-tls-options.test.mts

🧰 Additional context used

🧠 Learnings (2)

📚 Learning: 2025-10-19T04:55:33.099Z

Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: test/js/bun/http/node-telemetry.test.ts:27-203
Timestamp: 2025-10-19T04:55:33.099Z
Learning: In test/js/bun/http/node-telemetry.test.ts and the Bun.telemetry._node_binding API, after the architecture refactor, the _node_binding interface only contains two methods: handleIncomingRequest(req, res) and handleWriteHead(res, statusCode). The handleRequestFinish hook and other lifecycle hooks were removed during simplification. Both current methods are fully tested.

Applied to files:

• test/js/node/http/node-http-agent-tls-options.test.mts

📚 Learning: 2026-01-10T00:28:26.694Z

Learnt from: cirospaciari
Repo: oven-sh/bun PR: 25938
File: packages/bun-uws/src/HttpParser.h:0-0
Timestamp: 2026-01-10T00:28:26.694Z
Learning: In packages/bun-uws/src/HttpParser.h, the headData and headLength fields on HttpRequest are intentionally left populated for all request types (not just CONNECT/upgrade), as they will be used in the future for parse errors and other Node.js compatibility features. They should not be cleared after the requestHandler call.

Applied to files:

• packages/bun-uws/src/HttpParser.h

🔇 Additional comments (2)

packages/bun-uws/src/HttpParser.h (1)

20-22: LGTM! Consider the memory footprint increase.

Doubling the header limit from 100 to 200 is reasonable for supporting HTTP requests with many headers. Note that this increases the HttpRequest struct size by approximately 3.2KB (100 additional Header structs × ~32 bytes each) per request object, which should be acceptable for most use cases.

The #ifndef guard allows users to override this default if needed.

test/js/node/http/node-http-agent-tls-options.test.mts (1)

11-11: LGTM!

Import reorganization moves HttpsProxyAgent to the top of the import section, grouping it with other imports. No behavioral change.

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