{"record":{"id":"cd520b6ab2150723","repo":"fish2018/pansou","slug":"w-cd520b","errorCode":null,"errorMessage":"请求失败: %w","messagePattern":"请求失败: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"plugin/bixin/bixin.go","lineNumber":207,"sourceCode":"\treq.Header.Set(\"User-Agent\", getRandomUA())\n\treq.Header.Set(\"X-Forwarded-For\", generateRandomIP())\n\treq.Header.Set(\"Accept\", \"application/json, text/plain, */*\")\n\treq.Header.Set(\"Accept-Language\", \"zh-CN,zh;q=0.9,en;q=0.8\")\n\treq.Header.Set(\"Connection\", \"keep-alive\")\n\treq.Header.Set(\"Sec-Fetch-Dest\", \"empty\")\n\treq.Header.Set(\"Sec-Fetch-Mode\", \"cors\")\n\treq.Header.Set(\"Sec-Fetch-Site\", \"same-origin\")\n\t\n\tvar resp *http.Response\n\tvar responseBody []byte\n\t\n\t// 重试逻辑\n\tfor i := 0; i <= p.retries; i++ {\n\t\t// 发送请求\n\t\tresp, err = client.Do(req)\n\t\tif err != nil {\n\t\t\tif i == p.retries {\n\t\t\t\treturn nil, false, fmt.Errorf(\"请求失败: %w\", err)\n\t\t\t}\n\t\t\ttime.Sleep(500 * time.Millisecond)\n\t\t\tcontinue\n\t\t}\n\t\t\n\t\tdefer resp.Body.Close()\n\t\t\n\t\t// 读取响应体\n\t\tresponseBody, err = io.ReadAll(resp.Body)\n\t\tif err != nil {\n\t\t\tif i == p.retries {\n\t\t\t\treturn nil, false, fmt.Errorf(\"读取响应失败: %w\", err)\n\t\t\t}\n\t\t\ttime.Sleep(500 * time.Millisecond)\n\t\t\tcontinue\n\t\t}\n\t\t\n\t\t// 状态码检查","sourceCodeStart":189,"sourceCodeEnd":225,"githubUrl":"https://github.com/fish2018/pansou/blob/beaa56133755a548ebc51b090b3816e2ae044aa6/plugin/bixin/bixin.go#L189-L225","documentation":"fetchPage in the bixin plugin wraps any error from http.Client.Do after exhausting all retry attempts (p.retries). It means the HTTP transport itself failed — connection refused, DNS failure, TLS handshake error, or timeout — and retries (500ms apart) did not help. The original transport error is preserved via %w for errors.Is/As inspection.","triggerScenarios":"client.Do(req) returns a non-nil err on the final retry iteration (i == p.retries) inside fetchPage; e.g. the bixin API host is unreachable, DNS fails, TLS fails, or the request times out.","commonSituations":"API host blocked or offline, corporate proxy/firewall blocking outbound HTTPS, DNS misconfiguration, network outage, or too-low p.retries for a flaky network.","solutions":["Check basic connectivity to the bixin API host (curl the endpoint) to rule out network/firewall issues.","Inspect the wrapped error with errors.Is/As (e.g. net.Error timeout, *url.Error) to identify the transport root cause.","Increase p.retries or backoff duration to tolerate transient network blips.","Verify proxy environment variables (HTTP_PROXY/HTTPS_PROXY) and DNS resolution."],"exampleFix":"// before\nreturn nil, false, fmt.Errorf(\"请求失败: %w\", err)\n// after\nvar netErr net.Error\nif errors.As(err, &netErr) && netErr.Timeout() {\n    return nil, false, fmt.Errorf(\"请求超时(已重试%d次): %w\", p.retries, err)\n}\nreturn nil, false, fmt.Errorf(\"请求失败: %w\", err)","handlingStrategy":"retry","validationCode":"// caller-side preflight\nreq, _ := http.NewRequest(\"GET\", apiURL, nil)\nresp, err := http.DefaultClient.Do(req)\nif err != nil { log.Printf(\"bixin API unreachable: %v\", err) } else { resp.Body.Close() }","typeGuard":null,"tryCatchPattern":"results, err := plugin.Search(ctx, keyword)\nif err != nil {\n    var netErr net.Error\n    if errors.As(err, &netErr) && netErr.Timeout() {\n        // degrade gracefully: return cached or empty results\n    } else if errors.Is(err, context.DeadlineExceeded) {\n        // surface 'search timed out' to user\n    }\n}","preventionTips":["Check network/proxy configuration before deploying scrapers","Set a sane retries count with exponential backoff rather than fixed 500ms","Monitor DNS/firewall changes in the deployment environment","Log the wrapped root cause, not just the wrapper message"],"tags":["network","http","retry-exhausted","go"],"backgroundTag":"network-request-failed","analyzedSha":"beaa56133755a548ebc51b090b3816e2ae044aa6","analyzedAt":"2026-09-07T00:31:18.025Z","contentChangedAt":"2026-09-07T00:31:18.025Z","schemaVersion":2},"datasetVersion":"2026-09-15T23:17:13.987Z"}