\"\r\n };\r\n let response = format!(\r\n \"HTTP/1.1 200 OK\\r\\nContent-Type: text/html\\r\\nContent-Length: {}\\r\\nConnection: close\\r\\n\\r\\n{}\",\r\n html.len(),\r\n html\r\n );\r\n // Drop the BufReader so we can write back on the socket\r\n drop(reader);\r\n let _ = socket.write_all(response.as_bytes()).await;\r\n let _ = socket.shutdown().await;\r\n\r\n if !error.is_empty() {\r\n bail!(\"OAuth error: {}\", error);\r\n }\r\n\r\n if code.is_empty() || state.is_empty() {\r\n bail!(\"Missing code or state in OAuth callback\");\r\n }\r\n\r\n Ok((code, state))\r\n}\r\n\r\n/// Exchange authorization code for access tokens.\r\nasync fn exchange_code_for_tokens(code: &str, verifier: &str) -> anyhow::Result {\r\n let client = reqwest::Client::new();\r\n let params = [\r\n (\"client_id\", CODEX_CLIENT_ID),\r\n (\"code\", code),\r\n (\"code_verifier\", verifier),\r\n (\"grant_type\", \"authorization_code\"),\r\n (\"redirect_uri\", CODEX_REDIRECT_URI),\r","sourceCodeStart":156,"sourceCodeEnd":192,"githubUrl":"https://github.com/Kuberwastaken/claurst/blob/b0637c97ec34144387cbf2f74f65df6d16a6cef1/src-rust/crates/cli/src/codex_oauth_flow.rs#L156-L192","documentation":"The OAuth provider redirected back with an `error` query parameter instead of an authorization code — the user denied consent, or the provider rejected the request (e.g. invalid_client, access_denied, temporarily_unavailable). The formatted value is the provider's error code.","triggerScenarios":"Thrown at src-rust/crates/cli/src/codex_oauth_flow.rs:174 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Read the error code: access_denied means the user cancelled; restart the flow if they want to proceed","For server/provider errors, wait and retry the login","Verify the client_id and scopes in the auth URL are still registered with the provider"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b0637c97ec34144387cbf2f74f65df6d16a6cef1","analyzedAt":"2026-09-10T00:24:58.650Z","contentChangedAt":"2026-09-10T00:24:58.650Z","schemaVersion":2},"datasetVersion":"2026-09-17T15:17:12.973Z"}