{"record":{"id":"4323e6599dfae982","repo":"fish2018/pansou","slug":"d-w-4323e6","errorCode":null,"errorMessage":"请求失败，已重试%d次: %w","messagePattern":"请求失败，已重试(.+?)次: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"plugin/clmao/clmao.go","lineNumber":532,"sourceCode":"}\n\n// doRequestWithRetry 带重试的HTTP请求\nfunc (p *ClmaoPlugin) doRequestWithRetry(req *http.Request, client *http.Client) (*http.Response, error) {\n\tvar lastErr error\n\n\tfor i := 0; i < MaxRetries; i++ {\n\t\tresp, err := client.Do(req)\n\t\tif err == nil {\n\t\t\treturn resp, nil\n\t\t}\n\n\t\tlastErr = err\n\t\tif i < MaxRetries-1 {\n\t\t\ttime.Sleep(time.Duration(i+1) * time.Second)\n\t\t}\n\t}\n\n\treturn nil, fmt.Errorf(\"请求失败，已重试%d次: %w\", MaxRetries, lastErr)\n}\n\n// init 注册插件\nfunc init() {\n\tplugin.RegisterGlobalPlugin(NewClmaoPlugin())\n}\n","sourceCodeStart":514,"sourceCodeEnd":539,"githubUrl":"https://github.com/fish2018/pansou/blob/beaa56133755a548ebc51b090b3816e2ae044aa6/plugin/clmao/clmao.go#L514-L539","documentation":"ClmaoPlugin.doRequestWithRetry has exhausted all MaxRetries attempts for an HTTP request without success. Each failed attempt records lastErr and sleeps i+1 seconds between attempts (linear backoff). After the final failure it returns this aggregate error wrapping the last transport error. Called from searchPage and fetchModernDetail, so both search and modern-detail fetching surface this on connectivity problems.","triggerScenarios":"Any HTTP request issued via p.doRequestWithRetry fails on every one of MaxRetries attempts — network unreachable, DNS failure, connection reset, TLS error, or each attempt's context deadline (TimeoutSeconds) expiring. After the loop with no success: fmt.Errorf(\"请求失败，已重试%d次: %w\", MaxRetries, lastErr).","commonSituations":"The clmao site is down or geo-blocked; anti-bot measures drop connections from non-browser clients; the host has no internet/DNS in containers or CI; TimeoutSeconds too short so every attempt times out.","solutions":["Unwrap the error chain to find lastErr's actual cause (timeout vs connection refused vs TLS).","Verify outbound connectivity/DNS from the deployment environment (curl the endpoint).","Increase TimeoutSeconds if each attempt times out; adjust MaxRetries/backoff to fit the endpoint's reliability.","Update headers in setRequestHeaders (User-Agent, cookies) if the site started blocking the client.","Add exponential backoff with jitter and honor Retry-After if failures correlate with rate limiting."],"exampleFix":"// before\ntime.Sleep(time.Duration(i+1) * time.Second)\n// after\nbackoff := time.Duration(1<<uint(i)) * time.Second\nbackoff += time.Duration(rand.Int63n(int64(time.Second))) // jitter\ntime.Sleep(backoff)","handlingStrategy":"retry","validationCode":"func canReach(target string) bool {\n    ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)\n    defer cancel()\n    req, err := http.NewRequestWithContext(ctx, http.MethodGet, target, nil)\n    if err != nil { return false }\n    resp, err := http.DefaultClient.Do(req)\n    if err != nil { return false }\n    resp.Body.Close()\n    return true\n}","typeGuard":null,"tryCatchPattern":"resp, err := p.doRequestWithRetry(req, client)\nif err != nil {\n    var netErr net.Error\n    if errors.As(err, &netErr) && netErr.Timeout() { /* escalate timeout or circuit-break */ }\n    return nil, fmt.Errorf(\"clmao transport failure after retries: %w\", err)\n}","preventionTips":["Prefer %w so the root transport error stays inspectable with errors.Is/As.","Use exponential backoff with jitter instead of fixed linear sleeps.","Circuit-break after repeated total failures instead of hammering the site.","Validate environment egress (DNS, proxy) before running batch jobs."],"tags":["network","http","retry-exhausted","backoff"],"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"}