{"record":{"id":"0afa8e2f7f8d51bb","repo":"flipped-aurora/gin-vue-admin","slug":"error-0afa8e","errorCode":null,"errorMessage":"请求太过频繁，请稍后再试","messagePattern":"请求太过频繁，请稍后再试","errorType":"http","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"server/middleware/limit_ip.go","lineNumber":72,"sourceCode":"func DefaultLimit() gin.HandlerFunc {\n\treturn LimitConfig{\n\t\tGenerationKey: DefaultGenerationKey,\n\t\tCheckOrMark:   DefaultCheckOrMark,\n\t\tExpire:        global.GVA_CONFIG.System.LimitTimeIP,\n\t\tLimit:         global.GVA_CONFIG.System.LimitCountIP,\n\t}.LimitWithTime()\n}\n\n// SetLimitWithTime 设置访问次数：窗口内计数到达 limit 即拒绝。\nfunc SetLimitWithTime(key string, limit int, expiration time.Duration) error {\n\tcount, err := global.GVA_CACHE.IncrementWithExpire(key, 1, expiration)\n\tif err != nil {\n\t\t// 运行时缓存异常：记录日志并 fail-open 放行\n\t\tlogger.Bg().Mod(\"system\").Err(err).Error(\"limit increment\")\n\t\treturn nil\n\t}\n\tif count > int64(limit) {\n\t\treturn errors.New(\"请求太过频繁，请稍后再试\")\n\t}\n\treturn nil\n}\n\n// CacheCheckOrMark 基于 GVA_CACHE 的限流计数 超限返回错误 cache 异常 fail-open\nfunc CacheCheckOrMark(key string, expire int, limit int) error {\n\tif global.GVA_CACHE == nil {\n\t\treturn nil\n\t}\n\tn, err := global.GVA_CACHE.IncrementWithExpire(key, 1, time.Duration(expire)*time.Second)\n\tif err != nil {\n\t\tlogger.Bg().Mod(\"system\").Err(err).Error(\"limit\")\n\t\treturn nil // fail-open\n\t}\n\tif int(n) > limit {\n\t\treturn errors.New(\"请求太过频繁，请稍后再试\")\n\t}\n\treturn nil","sourceCodeStart":54,"sourceCodeEnd":90,"githubUrl":"https://github.com/flipped-aurora/gin-vue-admin/blob/3136500ef380842b0eb6c4daa87c3f8a47fcf9e0/server/middleware/limit_ip.go#L54-L90","documentation":"SetLimitWithTime is the rate-limit check behind the IP limiter middleware: it increments a counter in the runtime cache for a key and expires it after the window. When the incremented count exceeds the configured limit, it returns this error, which the middleware converts into an HTTP 429-style rejection. Cache errors deliberately fail open (logged, allowed) — this error is only the genuine over-limit case.","triggerScenarios":"A client IP exceeding `limit` requests within `expire` seconds on a route wrapped with the limiter (e.g. via DefaultCheckOrMark). Bursty scripts, retries, or shared NAT/proxy IPs where many users share one IP exhaust the window quota.","commonSituations":"Load tests or scripts hammering a login endpoint; offices/campuses behind one egress IP; aggressive frontend polling; misconfigured (too low) limit for legitimate traffic.","solutions":["Wait for the time window to elapse — the counter expires automatically and traffic resumes","Increase the route's limit / window configuration to match legitimate traffic volume","If many legitimate users share one IP, raise the limit or key by user+IP instead of IP alone","Stop/retry-with-backoff in client scripts so they stop tripping the limiter"],"exampleFix":"// before: unbounded retries in client\nfor { await fetch('/login', opts) }\n// after: backoff on 429\nfor (let i = 0; i < 5; i++) {\n  const res = await fetch('/login', opts)\n  if (res.status !== 429) break\n  await new Promise(r => setTimeout(r, 2 ** i * 1000))\n}","handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"resp, err := client.Do(req)\nif err == nil && resp.StatusCode == 429 {\n    retryAfter := parseRetryAfter(resp) // else exponential backoff\n    time.Sleep(retryAfter)\n    // retry with cap\n}","preventionTips":["Add exponential backoff with jitter to client retry loops","Size the limit/window to legitimate traffic, including shared-IP users","Batch or cache calls instead of polling","Monitor 429 rates and alert when legitimate users are throttled"],"tags":["rate-limit","middleware","http-429"],"backgroundTag":"rate-limit-exceeded","analyzedSha":"3136500ef380842b0eb6c4daa87c3f8a47fcf9e0","analyzedAt":"2026-08-31T13:50:02.721Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}