{"record":{"id":"dfeef7a34c83d91b","repo":"fish2018/pansou","slug":"s-d-w","errorCode":null,"errorMessage":"[%s] 第%d页搜索请求失败: %w","messagePattern":"\\[(.+?)\\] 第(.+?)页搜索请求失败: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"plugin/dy4k/dy4k.go","lineNumber":405,"sourceCode":"\t}\n\n\tstartTime := time.Now()\n\tresp, err := p.doRequestWithRetry(req, client)\n\trequestDuration := time.Since(startTime)\n\n\tif err != nil {\n\t\tdebugPrintf(\"❌ [Dy4k DEBUG] HTTP请求失败 (耗时: %v): %v\\n\", requestDuration, err)\n\t\tdebugPrintf(\"❌ [Dy4k DEBUG] 错误类型分析:\\n\")\n\t\tif netErr, ok := err.(*url.Error); ok {\n\t\t\tfmt.Printf(\"    URL错误: %v\\n\", netErr.Err)\n\t\t\tif netErr.Timeout() {\n\t\t\t\tfmt.Printf(\"    -> 这是超时错误\\n\")\n\t\t\t}\n\t\t\tif netErr.Temporary() {\n\t\t\t\tfmt.Printf(\"    -> 这是临时错误\\n\")\n\t\t\t}\n\t\t}\n\t\treturn nil, 0, fmt.Errorf(\"[%s] 第%d页搜索请求失败: %w\", p.Name(), page, err)\n\t}\n\tdefer resp.Body.Close()\n\n\tdebugPrintf(\"✅ [Dy4k DEBUG] HTTP请求成功 (耗时: %v)\\n\", requestDuration)\n\n\t// 6. 检查状态码\n\tdebugPrintf(\"🔧 [Dy4k DEBUG] HTTP响应状态码: %d\\n\", resp.StatusCode)\n\tif resp.StatusCode != 200 {\n\t\tdebugPrintf(\"❌ [Dy4k DEBUG] 状态码异常: %d\\n\", resp.StatusCode)\n\t\treturn nil, 0, fmt.Errorf(\"[%s] 第%d页请求返回状态码: %d\", p.Name(), page, resp.StatusCode)\n\t}\n\n\t// 7. 读取并打印HTML响应\n\thtmlBytes, err := io.ReadAll(resp.Body)\n\tif err != nil {\n\t\treturn nil, 0, fmt.Errorf(\"[%s] 第%d页读取响应失败: %w\", p.Name(), page, err)\n\t}\n","sourceCodeStart":387,"sourceCodeEnd":423,"githubUrl":"https://github.com/fish2018/pansou/blob/beaa56133755a548ebc51b090b3816e2ae044aa6/plugin/dy4k/dy4k.go#L387-L423","documentation":"searchPage wraps an error from the underlying HTTP client.Do for page N of the dy4k search. The preceding code classifies netErr.Timeout()/Temporary(), but regardless of type the request failed at the transport level after (possibly) retries. The wrapped cause is preserved for errors.Is/As inspection.","triggerScenarios":"client.Do(req) returns an error on page N: context deadline (DefaultTimeout) exceeded, connection reset/refused, DNS failure, or proxy/SOCKS5 dial failure. The surrounding debug output explicitly checks net.Error Timeout/Temporary, so timeouts are a first-class trigger.","commonSituations":"Target site slow or blocking by IP so requests hang past DefaultTimeout; too many parallel page requests cause connection resets; no/broken proxy configured while the site requires one; IPv6 issues causing hangs.","solutions":["Read the debug output / unwrap the error to distinguish timeout vs reset vs DNS and act accordingly.","Increase DefaultTimeout and add per-page throttling or a worker limit to avoid hammering the site.","Configure a working proxy if the site is unreachable from the current network.","Implement bounded retry with backoff for Temporary network errors before surfacing the failure."],"exampleFix":"// before\nreturn nil, 0, fmt.Errorf(\"[%s] 第%d页搜索请求失败: %w\", p.Name(), page, err)\n// after\nvar netErr net.Error\nif errors.As(err, &netErr) && netErr.Timeout() {\n    return nil, 0, fmt.Errorf(\"[%s] 第%d页请求超时(考虑增大DefaultTimeout): %w\", p.Name(), page, err)\n}\nreturn nil, 0, fmt.Errorf(\"[%s] 第%d页搜索请求失败: %w\", p.Name(), page, err)","handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"var netErr net.Error\nif errors.As(err, &netErr) {\n    if netErr.Timeout() {\n        // increase timeout or skip page\n    } else if ne, ok := err.(*net.OpError); ok && isTransient(ne) {\n        // retry with exponential backoff\n    }\n}","preventionTips":["Bound concurrent page requests to avoid resets.","Set DefaultTimeout generously for slow upstreams.","Retry only transient network errors, with backoff.","Check site/proxy reachability before batch scraping."],"tags":["network","http","timeout","pagination"],"backgroundTag":"http-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"}