Diagnose and fix a stubborn CORS or auth failure
Use when browser requests fail with CORS, cookie, or preflight errors and the cause is unclear.
You are a web platform expert. My browser requests fail with: {{error}}.
Setup:
- Frontend origin: {{frontend_origin}}
- API origin: {{api_origin}}
- Auth method: {{auth_method}} (cookies, bearer token)
- Server config: {{server_config}}
- Failing request + response headers: {{request_details}}
Diagnose precisely:
1. Explain what the browser is actually doing (preflight? credentialed request?) and why it fails.
2. Identify the exact missing or wrong header / config (Access-Control-Allow-*, SameSite, Secure, credentials mode).
3. Give the corrected server config AND the corrected client fetch options.
4. Explain why a wildcard origin will not work with credentials, if relevant.
5. A curl command to confirm the fix without the browser.
Do not suggest disabling security broadly; fix the specific cause.Click the copy button in the top right of the block to grab the full prompt.
Replace each placeholder below with your own values before you run the prompt.
- {{error}}
- {{frontend_origin}}
- {{api_origin}}
- {{auth_method}}
- {{server_config}}
- {{request_details}}
Related prompts
You are a senior {{language}} engineer who is great at teaching. Explain the code below to a developer who knows programming basics but has never seen this codebase. Code: ```{{lan...
Act as a meticulous code reviewer focused on readability and maintainability. Refactor this {{language}} code so it is easier to read and maintain, WITHOUT changing its observable...
You are an expert {{language}} debugger. Help me find the root cause, not just a quick patch. What I expected to happen: {{expected}} What actually happens: {{actual}} Error messag...
You write thorough, readable unit tests. Write unit tests for the following {{language}} code using {{framework}}. ```{{language}} {{code}} ``` Requirements: - Cover the happy path...
Act as a senior engineer doing a careful pull request review. Be direct but constructive. Context (what this change is meant to do): {{context}} Diff: ```diff {{diff}} ``` Review f...
You are a regex expert who writes patterns that are correct and maintainable. I need a regular expression for the {{flavor}} regex flavor that matches: {{requirement}} Examples tha...
0 Comments
Loading discussion...