René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fix 403 Forbidden: Add User-Agent header to OpenAI client fetch to prevent WAF/Cloudflare blocks","articleBody":"### Description\nWhen using `deepcode-cli` with custom/proxy API endpoints (e.g., endpoints routed through Cloudflare or strict enterprise WAFs), requests immediately fail with a `403 Your request was blocked` error.\n\n### Root Cause\nIn the initialization of the OpenAI client, the custom `fetch` implementation using `undiciFetch` does not provide a default `User-Agent`. \nMany CDNs and WAFs (like Cloudflare) automatically block HTTP requests missing a `User-Agent` as a basic anti-bot measure.\n\n`\typescript\n// Current implementation\nfetch: (url, init) =\u003e undiciFetch(url, { ...init, dispatcher: keepAliveAgent })\n`\n\n### Proposed Solution\nInject a standard or tool-specific `User-Agent` into the headers before passing them to `undiciFetch`. \n\n`\typescript\nfetch: (url, init) =\u003e {\n  const headers = new Headers(init?.headers);\n  if (!headers.has(\"User-Agent\")) {\n    headers.set(\"User-Agent\", \"deepcode-cli/0.1.x (Node.js)\");\n  }\n  \n  // Note: undiciFetch expects a plain object or an array of arrays for headers in some older TS setups, \n  // so converting Headers back to an object might be necessary depending on the exact undici version used.\n  const headersObj = Object.fromEntries(headers.entries());\n\n  return undiciFetch(url, { \n    ...init, \n    headers: headersObj,\n    dispatcher: keepAliveAgent \n  });\n}\n`\n\n### Steps to Reproduce\n1. Set `BASE_URL` in `~/.deepcode/settings.json` to an API endpoint protected by Cloudflare.\n2. Run `deepcode` and send a message.\n3. Observe the `403 Your request was blocked` error.","author":{"url":"https://github.com/ID-VerNe","@type":"Person","name":"ID-VerNe"},"datePublished":"2026-06-14T02:34:54.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/177/deepcode-cli/issues/177"}