Request中的Form字段就是如此,在没有直接或间接调用ParseForm()时,Form其实是nil,但是,你如果println出来,却是map[],可能有些困惑。通过跟踪源码可以发现,Form根本没有初始化。而在FormValue()方法中会判断Form是否为nil,然后决定是否调用ParseForm()方法,当然,你也可以手动调用ParseForm()方法。 1 2 3 4 5 6...
varglobalSource=pflag.String("global.source","default(flag)","identify the source of configuration")varserverAddress=pflag.String("server.address","","server listen address, empty for all")varserverPort=pflag.Int("server.port",8080,"server listen port"funcmain(){/* ... */pflag.Parse()vip...
//Compile parses a regular expression and returns, if successful,//a Regexp that can be used to match against text.func Compile(strstring) (*Regexp, error) { 3.包名尽量简洁有意义,一般是一个小写单词,不需要下划线或者驼峰命名。不要用点号引进包,除非是为了简化单元测试。 4.Go不提供getters和se...
ParseDuration("15m") next := now.Add(mm) next = time.Date(next.Year(), next.Month(), next.Day(), next.Hour(), next.Minute(), 0, 0, next.Location()) t := time.NewTimer(next.Sub(now)) <-t.C fmt.Println("start clear goroutine") l.cache.Range(func(key, value interface{...
github.com/spf13/pflag")func main() {// using standard library "flag" packageflag.Int("flagname", 1234, "help message for flagname")pflag.CommandLine.AddGoFlagSet(flag.CommandLine)pflag.Parse()viper.BindPFlags(pflag.CommandLine)i := viper.GetInt("flagname") // retrieve value from ...
= nil { return e.setErrorInfo(err) } dest.Field(i).SetFloat(res) case reflect.Bool: res, err := strconv.ParseBool(value) if err != nil { return e.setErrorInfo(err) } dest.Field(i).SetBool(res) } return nil } 通过switch dest.Field(i).Kind() case来一一匹配结构体里的字段是...
value_split 字段名和值之间以什么连接, 一般是等号. 必须设置 Json 可以将一个json字符串解析成一个json对象, 解析成功后, 会将解析出来的字段放到目标字段中. 如果源字段不存在, 或者Json.parse 失败, 返回 false Json: field: request target: request_fields include: ["client", "host"] exclude: ["req...
db, err := sql.Open("mysql","web:pass@/snippetbox?parseTime=true")iferr !=nil{ ... } Behind the scenes of rows.Scan() your driver will automatically convert the raw output from the SQL database to the required native Go types. So long as you’re sensible with the types that you...
funcmain(){flag.StringVar(&redisAddr,"redis","127.0.0.1:6379","-redis use redis addr ")flag.Parse()gofunc(){http.ListenAndServe("0.0.0.0:8003",nil)}()wg:=sync.WaitGroup{}wg.Add(1)fori:=0;i<200;i++{gogo_get(wg)}wg.Wait()}funcgo_get(wg sync.WaitGroup){client,err:=redis....
funcmain(){vardirstringflag.StringVar(&dir,"dir",".","the directory to serve files from. Defaults to the current dir")flag.Parse()r:=mux.NewRouter()// http://localhost:8000/static/<filename>r.PathPrefix("/static/").Handler(http.StripPrefix("/static/",http.FileServer(http.Dir(dir))...