1. r := gin.Default()
1. debugPrintWARNINGDefault()
由环境变量`GIN_MODE` 来指定
2. engine := New()
1. 初始化 RouterGroup
2. engine.pool.New = func() interface{} {<br> return engine.allocateContext()<br> }
3. engine.Use(Logger(), Recovery())
1. 打印请求日志
2. 错误处理
2. r.GET("/ping", func(c *gin.Context) {<br> c.String(http.StatusOK, "pong")<br> })
1. handle(httpMethod, relativePath string, handlers HandlersChain)
1. group.calculateAbsolutePath(relativePath)
2. handlers = group.combineHandlers(handlers)
3. group.engine.addRoute(httpMethod, absolutePath, handlers)
3. r.Run(":8080")
1. engine.prepareTrustedCIDRs()
2. resolveAddress(addr)
3. http.ListenAndServe(address, engine)
4. ServeHTTP(w http.ResponseWriter, req *http.Request)
1. engine.pool.Get().(*Context)
2. c.reset()
3. engine.handleHTTPRequest(c)
1. 遍历所有的 engine.trees 找到对应的 handleFunc
2. value := root.getValue(rPath, c.params, unescape)
3. if value.params != nil {<br> c.Params = *value.params<br> }<br> if value.handlers != nil {<br> c.handlers = value.handlers<br> c.fullPath = value.fullPath<br> c.Next()<br> c.writermem.WriteHeaderNow()<br> return<br> }
4. 没有匹配的路由， 错误处理 或者 重定向
4. engine.pool.Put(c)
