本地 Mock 服务 /mock + 限流 20QPS/60QPM + 服务条款

- Go Mock 引擎(与前端同语法 @cname/@integer/... 每次请求随机生成,JSON 叶子保持类型)
- mock_endpoints 表 + 发布 API(PUT /api/workspaces/:id/mock,全量替换,单空间 200 个)
- 路由 /mock/:wsid/*path:状态码/延迟(≤5s)/?_method 覆盖;未发布 404
- 限流(IP+空间 滑动窗口):20 QPS / 60 QPM → 429 + Retry-After + 条款提示
- 官网 /terms 服务条款(七节:含禁止滥用——未经授权或滥用有权采取措施、技术手段规避限流属违规)
- UI:HTTP 编辑器「Mock 链接」弹窗(发布/状态码/延迟/模板预览/复制/试一试);
  发布自动烘焙智能 Mock 表达式;集合端点去重 + INSERT OR REPLACE
- docs:14-mock 增本地 Mock 服务与限流章节;页脚/429 响应均指向 /terms
- 单测:mocksrv 引擎/限流/路径 5 用例;curl E2E(随机×2、201+延迟、404、连发 30 次触发 429);浏览器发布+试一试通过
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logan committed 2026-09-18 12:29:49 +08:00
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package mocksrv
import (
"net/http"
"strconv"
"strings"
"sync"
"time"
"github.com/gin-gonic/gin"
)
/* ---------------- 存储 ---------------- */
// Endpoint 一条已发布的 Mock 接口。
type Endpoint struct {
Method string `json:"method"`
Path string `json:"path"`
Status int `json:"status"`
ContentType string `json:"contentType"`
Body string `json:"body"`
DelayMs int `json:"delayMs"`
}
type storeAPI interface {
ReplaceMockEndpoints(workspaceID int64, list []Endpoint) error
FindMockEndpoint(workspaceID int64, method, path string) (*Endpoint, bool, error)
}
/* ---------------- 限流:20 QPS / 60 QPM(按 IP + 空间,滑动窗口) ---------------- */
const (
LimitQPS = 20
LimitQPM = 60
)
type slot struct {
at int64 // 秒时间戳
n int64
}
type bucket struct {
slots [60]slot
}
type limiter struct {
mu sync.Mutex
buckets map[string]*bucket
}
func newLimiter() *limiter { return &limiter{buckets: map[string]*bucket{}} }
// allow 滑动窗口判定:最近 1 秒 ≤ 20 且最近 60 秒 ≤ 60。
func (l *limiter) allow(key string, now time.Time) bool {
l.mu.Lock()
b, ok := l.buckets[key]
if !ok {
b = &bucket{}
l.buckets[key] = b
if len(l.buckets) > 10000 { // 粗略防膨胀
l.buckets = map[string]*bucket{key: b}
}
}
l.mu.Unlock()
s := now.Unix()
cur := &b.slots[s%60]
if cur.at != s {
cur.at = s
cur.n = 0
}
var minCount int64
for i := range b.slots {
if b.slots[i].at > s-60 {
minCount += b.slots[i].n
}
}
if cur.n >= LimitQPS || minCount >= LimitQPM {
return false
}
cur.n++
return true
}
/* ---------------- 服务 ---------------- */
type Server struct {
store storeAPI
lim *limiter
}
func New(store storeAPI) *Server {
return &Server{store: store, lim: newLimiter()}
}
func (s *Server) Register(r *gin.Engine) {
g := r.Group("/mock")
g.Any("/:wsid/*path", s.handle)
}
// handle:发布查询 → 限流 → 延迟 → 生成
func (s *Server) handle(c *gin.Context) {
wsid := c.Param("wsid")
path := normalizePath(c.Param("path"))
method := strings.ToUpper(c.Query("_method"))
if method == "" {
method = strings.ToUpper(c.Request.Method)
}
if method == "HEAD" {
method = "GET"
}
key := clientIP(c) + "|" + wsid
if !s.lim.allow(key, time.Now()) {
c.Header("Retry-After", "60")
c.JSON(http.StatusTooManyRequests, gin.H{
"error": "请求过于频繁,已限流(20 QPS / 60 QPM)",
"terms": "/terms",
"reason": "服务条款明确禁止滥用:通过技术手段规避限流属于违规行为",
})
return
}
wsID, _ := strconv.ParseInt(wsid, 10, 64)
ep, found, err := s.store.FindMockEndpoint(wsID, method, path)
if err != nil {
c.JSON(http.StatusInternalServerError, gin.H{"error": "mock 存储读取失败"})
return
}
if !found {
c.JSON(http.StatusNotFound, gin.H{
"error": "Mock 接口不存在:" + method + " " + path + ",请先在客户端「Mock 链接」中发布",
})
return
}
if ep.DelayMs > 0 {
if ep.DelayMs > 5000 {
ep.DelayMs = 5000
}
time.Sleep(time.Duration(ep.DelayMs) * time.Millisecond)
}
ct := ep.ContentType
if ct == "" {
ct = "application/json"
}
c.Data(ep.statusOrOK(), ct, []byte(GenerateJSON(ep.Body)))
}
func (e *Endpoint) statusOrOK() int {
if e.Status <= 0 {
return http.StatusOK
}
return e.Status
}
func normalizePath(p string) string {
if p == "" {
return "/"
}
if !strings.HasPrefix(p, "/") {
p = "/" + p
}
if len(p) > 1 {
p = strings.TrimSuffix(p, "/")
}
return p
}
func clientIP(c *gin.Context) string {
ip := c.ClientIP()
if ip == "" {
ip = "unknown"
}
return ip
}