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fix: deprecate USE_FIXED_HTTP for SSE streaming support (Issue #524) (#525)

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* fix: deprecate USE_FIXED_HTTP for SSE streaming support (Issue #524)

The fixed HTTP implementation does not support SSE streaming required
by clients like OpenAI Codex. This commit deprecates USE_FIXED_HTTP
and makes SingleSessionHTTPServer the default.

Changes:
- Add deprecation warnings in src/mcp/index.ts and src/http-server.ts
- Remove USE_FIXED_HTTP from docker-compose.yml and Dockerfile.railway
- Update .env.example with deprecation notice
- Rename npm script to start:http:fixed:deprecated
- Update all documentation to remove USE_FIXED_HTTP references
- Mark test case as deprecated

Users should unset USE_FIXED_HTTP to use the modern SingleSessionHTTPServer
which supports both JSON-RPC and SSE streaming.

Closes #524

Concieved by Romuald Członkowski - www.aiadvisors.pl/en

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* chore: bump version to 2.31.8 and add CHANGELOG entry

- Fix comment inaccuracy: "deprecated" not "deprecated and removed"
- Bump version from 2.31.7 to 2.31.8
- Add CHANGELOG entry documenting USE_FIXED_HTTP deprecation
- Update all deprecation messages to reference v2.31.8

Concieved by Romuald Członkowski - www.aiadvisors.pl/en

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Romuald Członkowski <romualdczlonkowski@MacBook-Pro-Romuald.local>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Romuald Członkowski
2026-01-07 13:42:16 +01:00
committed by GitHub
parent 7b0ff990ec
commit 861005eeed
13 changed files with 77 additions and 6839 deletions
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18
src/mcp/index.ts
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@@ -124,9 +124,23 @@ Learn more: https://github.com/czlonkowski/n8n-mcp/blob/main/PRIVACY.md
checkpoints.push(STARTUP_CHECKPOINTS.MCP_HANDSHAKE_STARTING);
if (mode === 'http') {
// Check if we should use the fixed implementation
// Check if we should use the fixed implementation (DEPRECATED)
if (process.env.USE_FIXED_HTTP === 'true') {
// Use the fixed HTTP implementation that bypasses StreamableHTTPServerTransport issues
// DEPRECATION WARNING: Fixed HTTP implementation is deprecated
// It does not support SSE streaming required by clients like OpenAI Codex
logger.warn(
'DEPRECATION WARNING: USE_FIXED_HTTP=true is deprecated as of v2.31.8. ' +
'The fixed HTTP implementation does not support SSE streaming required by clients like OpenAI Codex. ' +
'Please unset USE_FIXED_HTTP to use the modern SingleSessionHTTPServer which supports both JSON-RPC and SSE. ' +
'This option will be removed in a future version. See: https://github.com/czlonkowski/n8n-mcp/issues/524'
);
console.warn('\n⚠️ DEPRECATION WARNING ⚠️');
console.warn('USE_FIXED_HTTP=true is deprecated as of v2.31.8.');
console.warn('The fixed HTTP implementation does not support SSE streaming.');
console.warn('Please unset USE_FIXED_HTTP to use SingleSessionHTTPServer.');
console.warn('See: https://github.com/czlonkowski/n8n-mcp/issues/524\n');
// Use the deprecated fixed HTTP implementation
const { startFixedHTTPServer } = await import('../http-server');
await startFixedHTTPServer();
} else {