Golang frequently used code snippets

This is a creation in Article, where the information may have evolved or changed.

Here is a snippet of code that I used to write the Golang app for later use.

Send user:passwd information via HTTP package

    发送类似于 curl -u 的请求    client := &http.Client{}    req, err := http.NewRequest("GET", <url>, nil)    req.SetBasicAuth(<username>, <userpasswd>)    if err != nil {        log.Fatal(err)    }    resp, err := client.Do(req)    if err != nil {        log.Fatal(err)    }    content, err := ioutil.ReadAll(resp.Body)    if err != nil {        log.Fatal(err)    }

Golang converting an unknown object to an array by reflection

func interfaceSlice(slice interface{}) []interface{} {      s := reflect.ValueOf(slice)    if s.Kind() != reflect.Slice {        panic("InterfaceSlice() given a non-slice type")    }    ret := make([]interface{}, s.Len())    for i := 0; i < s.Len(); i++ {        ret[i] = s.Index(i).Interface()    }    return ret}

Mux Get get query parameter

    vals := r.URL.Query()    oriDriver, ok := vals["driver"]

Mux cross-domain access code

     methodsOk := handlers.AllowedMethods([]string{"GET", "HEAD", "POST", "PUT", "OPTIONS"})    headersOk := handlers.AllowedHeaders([]string{"X-Requested-With"})    originsOk := handlers.AllowedOrigins([]string{"*"})    log.Println(http.ListenAndServe(":8000", handlers.CORS(headersOk, originsOk, methodsOk)(r)))

Finding files recursively

    Func readapk (Path string, apk map[string]int) {//FMT. PRINTLN ("Processing", path) files, _: = Ioutil. ReadDir (Path) for _, File: = Range Files {//FMT. Println (file. Name (), file. Isdir ()) if file. Isdir () {readapk (path+ "/" +file. Name (), apk)} else {if Strings.compare (file. Name (), "APK.log") = = 0 {ap: = make (map[string]string) body, err: = Ioutil. ReadFile (path + "/" + file.) Name ()) if err! = Nil {fmt. Printf ("[%s] read failed [%s]\n", file. Name (), Err. Error ()) return} err = json. Unmarshal (body, &AP) if err! = Nil {fmt. Printf ("[%s] parse failed [%s]\n", file. Name (), Err. Error ()) return} for a: = Range ap {at: = strings.                    Split (Ap[a], "|+|") For _, Atemp: = range at {info: = strings. Split (atemp, "|-|"If Len (info) > 1 {header: = strings. Split (info[1], "") for _, H: = Range Header {if strings. Contains (H, "Referer:") {u, err: = URL. Parserequesturi (h[8:]) if err! = Nil {fmt. Println (Err.                                    Error ())} else {apk[u.host]++                    }                                }                            }                        } }                }            }        }    }}

Parsing data that MONGO already exists

type App struct {      Id string `json:"id" bson:"_id,omitempty"`    User_id string `bson:"user_id"`    Name string `bson:"name"`    Domain string `bson:"domain"`    Business_line string `bson:"business_line"`}重点: 1.使用bson修饰符  2.各个flag直接使用空格分割  3._id和omitempty使用,分割。同时不能存在空格  

Timer

    for {        now := time.Now()        next := now.Add(time.Minute * 10)        next = time.Date(next.Year(), next.Month(), next.Day(), next.Hour(), next.Minute(), 0, 0, next.Location())        t := time.NewTimer(next.Sub(now))        log.Printf("下次采集时间为[%s]\n", next.Format("200601021504"))        select {        case <-t.C:            err := sync.Gather()            if err != nil {                log.Println(err)            }        }    }