{"record":{"id":"232c33b0a7a75c4f","repo":"chenhg5/cc-connect","slug":"reasonix-create-request-w","errorCode":null,"errorMessage":"reasonix: create request: %w","messagePattern":"reasonix: create request: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"agent/reasonix/session.go","lineNumber":486,"sourceCode":"\t\treturn\n\t}\n\ts.emit(core.Event{Type: core.EventThinking, Content: text})\n}\n\n// httpPost sends a JSON POST request to the reasonix serve endpoint.\nfunc (s *reasonixSession) httpPost(path string, body any) error {\n\tvar reqBody io.Reader\n\tif body != nil {\n\t\tdata, err := json.Marshal(body)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"reasonix: marshal body: %w\", err)\n\t\t}\n\t\treqBody = bytes.NewReader(data)\n\t}\n\n\treq, err := http.NewRequestWithContext(s.ctx, \"POST\", s.serveURL+path, reqBody)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"reasonix: create request: %w\", err)\n\t}\n\treq.Header.Set(\"Content-Type\", \"application/json\")\n\n\tresp, err := http.DefaultClient.Do(req)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"reasonix: POST %s: %w\", path, err)\n\t}\n\tdefer func() {\n\t\tif err := resp.Body.Close(); err != nil {\n\t\t\tslog.Warn(\"reasonix: POST close body\", \"path\", path, \"error\", err)\n\t\t}\n\t}()\n\n\tif resp.StatusCode >= 400 {\n\t\t// Include response body (first 512 bytes) in error for debugging.\n\t\terrBody, _ := io.ReadAll(io.LimitReader(resp.Body, 512))\n\t\treturn fmt.Errorf(\"reasonix: POST %s returned %d: %s\", path, resp.StatusCode, strings.TrimSpace(string(errBody)))\n\t}","sourceCodeStart":468,"sourceCodeEnd":504,"githubUrl":"https://github.com/chenhg5/cc-connect/blob/4000b2338aa6e850c99df54f8b0ed6ed7460b401/agent/reasonix/session.go#L468-L504","documentation":"httpPost builds the POST request with http.NewRequestWithContext against s.serveURL+path. Failure here (wrapped as 'reasonix: create request: %w') means the request could not even be constructed — almost always a malformed URL. The context itself comes from the session, so a canceled context does NOT fail here (it fails later at Do).","triggerScenarios":"s.serveURL is malformed (bad scheme, spaces, control characters, unparseable host) so http.NewRequestWithContext returns an error when parsing the combined URL, during newSession, Send, or RespondPermission.","commonSituations":"serve_url in config.toml missing the http:// scheme, containing a trailing path with spaces, or being built by string concatenation with an empty base producing a relative URL like '/session'.","solutions":["Print/check s.serveURL — validate it with url.Parse before creating the session","Fix the serve_url value in config.toml to a full absolute URL including scheme, e.g. http://127.0.0.1:8080","Reject empty or relative serve URLs at agent construction with a clear config error"],"exampleFix":"// before\nserveURL := \"localhost:8080\" // no scheme\n// after\nu, err := url.Parse(cfg.ServeURL)\nif err != nil || u.Scheme == \"\" || u.Host == \"\" {\n    return nil, fmt.Errorf(\"reasonix: invalid serve_url %q\", cfg.ServeURL)\n}","handlingStrategy":"validation","validationCode":"u, err := url.Parse(serveURL)\nif err != nil || u.Scheme == \"\" || u.Host == \"\" {\n    return fmt.Errorf(\"invalid serve_url %q\", serveURL)\n}","typeGuard":null,"tryCatchPattern":"// Go\nif err := sess.Send(...); err != nil {\n    if strings.Contains(err.Error(), \"create request\") {\n        slog.Error(\"reasonix serve_url malformed\", \"err\", err)\n    }\n}","preventionTips":["Always include scheme+host in serve_url (http://127.0.0.1:PORT)","Validate URLs at config load time, not at request time","Use url.JoinPath instead of raw string concatenation for paths"],"tags":["http","url","config"],"backgroundTag":"invalid-url-format","analyzedSha":"4000b2338aa6e850c99df54f8b0ed6ed7460b401","analyzedAt":"2026-09-06T11:45:09.575Z","contentChangedAt":"2026-09-06T11:45:09.575Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}