How to use Println method of internal Package

...19	stmt, err := r.db.Prepare(`select e.id, e.name, e.category, u.name, e.host, e.description, e.datetime, e.location, e.photo 20								from events e join users u on e.hostid = u.id 21								where e.deleted_at IS NULL limit ? offset ?`)22	if err != nil {23		log.Println(err)24		return nil, totalEvent, err25	}26	limit := 527	offset := (page - 1) * limit28	res, err := stmt.Query(limit, offset)29	if err != nil {30		log.Println(err)31		return nil, totalEvent, err32	}33	defer res.Close()34	var events []entities.Event35	for res.Next() {36		var event entities.Event37		err := res.Scan(&event.Id, &event.Name, &event.Category, &event.UserName, &event.Host, &event.Description, &event.Datetime, &event.Location, &event.Photo)38		if err != nil {39			log.Println(err)40			return nil, totalEvent, err41		}42		events = append(events, event)43	}44	stmt2, err := r.db.Prepare(`select count(e.id)45								from events e 46								where e.deleted_at is null47								`)48	if err != nil {49		log.Println(err)50		return nil, totalEvent, err51	}52	res2, err := stmt2.Query()53	if err != nil {54		log.Println(err)55		return nil, totalEvent, err56	}57	defer res2.Close()58	for res2.Next() {59		err := res2.Scan(&totalEvent)60		if err != nil {61			log.Println(err)62			return nil, totalEvent, err63		}64	}65	return events, totalEvent, nil66}67// sudah dicek68func (r *EventRepository) GetEventByLocation(location string, page int) ([]entities.Event, int, error) {69	var totalEvent int70	stmt, err := r.db.Prepare(`select e.id, e.name, e.category, u.name, e.host, e.description, e.datetime, e.location, e.photo 71								from events e join users u on e.hostid = u.id72								where e.location = ? and e.deleted_at IS NULL 73								limit ? offset ?`)74	if err != nil {75		log.Println(err)76		return nil, totalEvent, err77	}78	limit := 579	offset := (page - 1) * limit80	res, errr := stmt.Query(location, limit, offset)81	if errr != nil {82		log.Println(err)83		return nil, totalEvent, err84	}85	stmt2, err := r.db.Prepare("select count(id) from events where location = ? and deleted_at IS NULL")86	if err != nil {87		log.Println(err)88		return nil, totalEvent, err89	}90	res2, err2 := stmt2.Query(location)91	if err2 != nil {92		log.Println(err2)93		return nil, totalEvent, err294	}95	if errr != nil {96		log.Println(err)97		return nil, totalEvent, err98	}99	fmt.Println("sampe sini jalan")100	defer res.Close()101	defer res2.Close()102	var events []entities.Event103	for res.Next() {104		var event entities.Event105		err := res.Scan(&event.Id, &event.Name, &event.Category, &event.UserName, &event.Host, &event.Description, &event.Datetime, &event.Location, &event.Photo)106		if err != nil {107			log.Println(err)108			return nil, totalEvent, err109		}110		// fmt.Println(totalEvent)111		events = append(events, event)112	}113	fmt.Println("sampe sini jalan2")114	for res2.Next() {115		err := res2.Scan(&totalEvent)116		if err != nil {117			log.Println(err)118			return nil, totalEvent, err119		}120		fmt.Println(totalEvent)121	}122	fmt.Println("sampe sini finish")123	return events, totalEvent, nil124}125func (r *EventRepository) CreateEvent(event entities.Event) (createdEvent entities.Event, code int, err error) {126	id, err := r.checkUserExistence(event.HostId)127	if err != nil {128		log.Println(err)129		code, err = http.StatusInternalServerError, errors.New("internal server error")130		return createdEvent, code, err131	}132	if id == 0 {133		log.Println("user no longer exist")134		code, err = http.StatusBadRequest, errors.New("user no longer exist")135		return createdEvent, code, err136	}137	stmt, err := r.db.Prepare("insert into events (name, host, description, datetime, location, category, photo, hostid, created_at) VALUES(?,?,?,?,?,?,?,?, CURRENT_TIMESTAMP)")138	if err != nil {139		log.Println(err)140		code, err = http.StatusInternalServerError, errors.New("internal server error")141		return createdEvent, code, err142	}143	res, err := stmt.Exec(event.Name, event.Host, event.Description, event.Datetime, event.Location, event.Category, event.Photo, event.HostId)144	if err != nil {145		log.Println(err)146		code, err = http.StatusInternalServerError, errors.New("internal server error")147		return createdEvent, code, err148	}149	id, err = res.LastInsertId()150	if err != nil {151		log.Println(err)152		code, err = http.StatusInternalServerError, errors.New("internal server error")153		return createdEvent, code, err154	}155	event.Id = int(id)156	stmt, err = r.db.Prepare("select name from users where id = ?")157	if err != nil {158		log.Println(err)159		code, err = http.StatusInternalServerError, errors.New("internal server error")160		return createdEvent, code, err161	}162	row, err := stmt.Query(event.HostId)163	if err != nil {164		log.Println(err)165		code, err = http.StatusInternalServerError, errors.New("internal server error")166		return createdEvent, code, err167	}168	defer row.Close()169	if row.Next() {170		var name string171		row.Scan(&name)172		event.UserName = name173	}174	return event, http.StatusOK, nil175}176func (r *EventRepository) DeleteEvent(eventid int) (code int, err error) {177	stmt, err := r.db.Prepare("update events set deleted_at = CURRENT_TIMESTAMP where id = ?")178	if err != nil {179		log.Println(err)180		code, err = http.StatusInternalServerError, errors.New("internal server error")181		return code, err182	}183	res, err := stmt.Exec(eventid)184	if err != nil {185		log.Println(err)186		code, err = http.StatusInternalServerError, errors.New("internal server error")187		return code, err188	}189	rowsAffected, err := res.RowsAffected()190	if err != nil {191		log.Println(err)192		code, err = http.StatusInternalServerError, errors.New("internal server error")193		return code, err194	}195	if rowsAffected == 0 {196		log.Println("rows affected is 0 while delete event")197		code, err = http.StatusBadRequest, errors.New("event not deleted")198		return code, err199	}200	return http.StatusOK, nil201}202// sudah diceck, return ditambah user name203func (r *EventRepository) GetEventByKeyword(keyword string, page int) ([]entities.Event, int, error) {204	var totalEvent int205	stmt, err := r.db.Prepare(`select e.id, e.name, e.category, u.name, e.host, e.description, e.datetime, e.location, e.photo 206								from events e join users u on e.hostid = u.id207								where e.deleted_at is null and e.name like ? limit ? offset ?`)208	if err != nil {209		log.Println(err)210		return nil, totalEvent, err211	}212	like := "%" + keyword + "%"213	limit := 5214	offset := (page - 1) * limit215	res, err := stmt.Query(like, limit, offset)216	if err != nil {217		log.Println(err)218		return nil, totalEvent, err219	}220	defer res.Close()221	var events []entities.Event222	for res.Next() {223		var event entities.Event224		err := res.Scan(&event.Id, &event.Name, &event.Category, &event.UserName, &event.Host, &event.Description, &event.Datetime, &event.Location, &event.Photo)225		if err != nil {226			log.Println(err)227			return nil, totalEvent, err228		}229		events = append(events, event)230	}231	stmt2, err := r.db.Prepare(`select count(e.id)232								from events e 233								where e.deleted_at is null and e.name like ? 234								`)235	if err != nil {236		log.Println(err)237		return nil, totalEvent, err238	}239	like2 := "%" + keyword + "%"240	res2, err := stmt2.Query(like2)241	if err != nil {242		log.Println(err)243		return nil, totalEvent, err244	}245	defer res2.Close()246	for res2.Next() {247		err := res2.Scan(&totalEvent)248		if err != nil {249			log.Println(err)250			return nil, totalEvent, err251		}252	}253	return events, totalEvent, nil254}255// sudah dicek, return ditambah user name256func (r *EventRepository) GetEventByCategory(category string, page int) ([]entities.Event, int, error) {257	var totalEvent int258	stmt, err := r.db.Prepare(`select e.id, e.name, e.category, u.name, e.host, e.description, e.datetime, e.location, e.photo 259								from events e join users u on e.hostid = u.id260								where e.deleted_at is null and e.category = ? limit ? offset ?`)261	if err != nil {262		log.Println(err)263		return nil, totalEvent, err264	}265	limit := 5266	offset := (page - 1) * limit267	res, err := stmt.Query(category, limit, offset)268	if err != nil {269		log.Println(err)270		return nil, totalEvent, err271	}272	defer res.Close()273	var events []entities.Event274	for res.Next() {275		var event entities.Event276		err := res.Scan(&event.Id, &event.Name, &event.Category, &event.UserName, &event.Host, &event.Description, &event.Datetime, &event.Location, &event.Photo)277		if err != nil {278			log.Println(err)279			return nil, totalEvent, err280		}281		events = append(events, event)282	}283	stmt2, err := r.db.Prepare(`select count(e.id)284								from events e 285								where e.deleted_at is null and e.category = ? 286								`)287	if err != nil {288		log.Println(err)289		return nil, totalEvent, err290	}291	res2, err := stmt2.Query(category)292	if err != nil {293		log.Println(err)294		return nil, totalEvent, err295	}296	defer res2.Close()297	for res2.Next() {298		err := res2.Scan(&totalEvent)299		if err != nil {300			log.Println(err)301			return nil, totalEvent, err302		}303	}304	return events, totalEvent, nil305}306// sudah dicek307func (r *EventRepository) GetEventByHostId(hostId int) ([]entities.Event, error) {308	stmt, err := r.db.Prepare(`select e.id, e.name, e.category, u.name, e.host, e.description, e.datetime, e.location, e.photo 309								from events e join users u on e.hostid = u.id310								where e.deleted_at is null and e.hostid = ?`)311	if err != nil {312		log.Println(err)313		return nil, err314	}315	res, err := stmt.Query(hostId)316	if err != nil {317		log.Println(err)318		return nil, err319	}320	defer res.Close()321	var events []entities.Event322	for res.Next() {323		var event entities.Event324		err := res.Scan(&event.Id, &event.Name, &event.Category, &event.UserName, &event.Host, &event.Description, &event.Datetime, &event.Location, &event.Photo)325		if err != nil {326			log.Println(err)327			return nil, err328		}329		events = append(events, event)330	}331	return events, nil332}333func (r *EventRepository) UpdateEvent(event entities.Event) (updatedEvent entities.Event, code int, err error) {334	stmt, err := r.db.Prepare("update events set name=?, host=?, description=?, datetime=?, location=?, category=?, photo=? where id=? and deleted_at is NULL")335	if err != nil {336		log.Println(err)337		code, err := http.StatusInternalServerError, errors.New("internal server error")338		return updatedEvent, code, err339	}340	res, err := stmt.Exec(event.Name, event.Host, event.Description, event.Datetime, event.Location, event.Category, event.Photo, event.Id)341	if err != nil {342		log.Println(err)343		code, err := http.StatusInternalServerError, errors.New("internal server error")344		return updatedEvent, code, err345	}346	rowsAffected, err := res.RowsAffected()347	if err != nil {348		log.Println(err)349		code, err = http.StatusInternalServerError, errors.New("internal server error")350		return updatedEvent, code, err351	}352	if rowsAffected == 0 {353		log.Println("rows affected is 0 while update event")354		code, err = http.StatusBadRequest, errors.New("event not updated")355		return updatedEvent, code, err356	}357	updatedEvent = event358	return updatedEvent, http.StatusOK, nil359}360func (r *EventRepository) GetEventByEventId(eventId int) (event entities.Event, err error) {361	stmt, err := r.db.Prepare(` select e.id, e.name, e.host, e.description, e.datetime, e.location, e.category, e.photo, e.hostid, u.name 362								from events e join users u on e.hostid = u.id363								where e.deleted_at IS NULL and e.id = ?`)364	if err != nil {365		log.Println(err)366		return event, errors.New("internal server error")367	}368	res, err := stmt.Query(eventId)369	if err != nil {370		log.Println(err)371		return event, errors.New("internal server error")372	}373	defer res.Close()374	if res.Next() {375		err := res.Scan(&event.Id, &event.Name, &event.Host, &event.Description, &event.Datetime, &event.Location, &event.Category, &event.Photo, &event.HostId, &event.UserName)376		if err != nil {377			log.Println(err)378			return event, errors.New("internal server error")379		}380	}381	return event, nil382}383func (r *EventRepository) checkUserExistence(userId int) (id int64, err error) {384	stmt, err := r.db.Prepare("select id from users where deleted_at is null and id = ?")385	if err != nil {386		return 0, err387	}388	res, err := stmt.Query(userId)389	if err != nil {390		return 0, err391	}...

...47		case InternalCmdHelp:48			cm.printHelpMessage()49			break50		case InternalCmdEnv:51			fmt.Println("External plug-in path : "+cm.plugHandle.dir)52			break53		case InternalCmdList:54			cm.plugHandle.PrintList()55			break56		case InternalCmdVer:57			fmt.Println(cxt.Version)58			break59		case InternalDevice:60			cm.printDevice()61			break62	}63	os.Exit(1)64}65//usage66func (cm *Cmd) printHelpMessage()  {67	fmt.Println("==================================================================================")68	fmt.Println("[Usage]")69	fmt.Println("")70	fmt.Println("    go-sniffer [device] [plug] [plug's params(optional)]")71	fmt.Println()72	fmt.Println("    [exp]")73	fmt.Println("          go-sniffer en0 redis          Capture redis packet")74	fmt.Println("          go-sniffer en0 mysql -p 3306  Capture mysql packet")75	fmt.Println()76	fmt.Println("    go-sniffer --[commend]")77	fmt.Println("               --help \"this page\"")78	fmt.Println("               --env  \"environment variable\"")79	fmt.Println("               --list \"Plug-in list\"")80	fmt.Println("               --ver  \"version\"")81	fmt.Println("               --dev  \"device\"")82	fmt.Println("    [exp]")83	fmt.Println("          go-sniffer --list \"show all plug-in\"")84	fmt.Println()85	fmt.Println("==================================================================================")86	cm.printDevice()87	fmt.Println("==================================================================================")88}89//print plug-in list90func (cm *Cmd) printPlugList() {91	l := len(cm.plugHandle.InternalPlugList)92	l += len(cm.plugHandle.ExternalPlugList)93	fmt.Println("#    Number of plug-ins : "+strconv.Itoa(l))94}95//print device96func (cm *Cmd) printDevice() {97	ifaces, err:= net.Interfaces()98	if err != nil {99		panic(err)100	}101	for _, iface := range ifaces {102		addrs, _ := iface.Addrs()103		for _,a:=range addrs {104			if ipnet, ok := a.(*net.IPNet); ok {105				if ip4 := ipnet.IP.To4(); ip4 != nil {106					fmt.Println("[device] : "+iface.Name+" : "+iface.HardwareAddr.String()+"  "+ip4.String())107				}108			}109		}110	}111}112//Parameters needed for plug-ins113func (cm *Cmd) parsePlugCmd()  {114	if len(os.Args) < 3 {115		fmt.Println("not found [Plug-in name]")116		fmt.Println("go-sniffer [device] [plug] [plug's params(optional)]")117		os.Exit(1)118	}119	cm.Device  = os.Args[1]120	plugName  := os.Args[2]121	plugParams:= os.Args[3:]122	cm.plugHandle.SetOption(plugName, plugParams)123}...

...29		ExternalIPAny = myip.ExternalIPAny(5)30	}()31}32func main() {33	fmt.Println("MyIP(可能为空, 但不阻塞)", InternalIPv4, InternalIPv6, ExternalIPv4, ExternalIPv6, ExternalIPAny)34	fmt.Println("获取外网地址 (IPv4):", myip.ExternalIPv4())35	fmt.Println("获取外网地址 (IPv6):", myip.ExternalIPv6())36	fmt.Println("获取外网地址 (出口公网地址, 优先获取 IPv4):", myip.ExternalIP())37	fmt.Println("获取外网地址 (出口公网地址 IPv4):", myip.ExternalIP("ipv4"))38	fmt.Println("获取外网地址 (出口公网地址 IPv6):", myip.ExternalIP("ipv6"))39	fmt.Println("获取内网地址 (IPv4):", myip.InternalIPv4())40	fmt.Println("获取内网地址 (临时 IPv6 地址):", myip.InternalIPv6())41	fmt.Println("获取内网地址 (出口本地地址):", myip.InternalIP("", ""))42	fmt.Println("获取内网地址 (出口本地地址):", myip.InternalIP("1.1.1.1:53", "udp"))43	fmt.Println("获取内网地址 (出口本地地址):", myip.InternalIP("baidu.com:443", "tcp"))44	fmt.Println("获取内网地址 (出口本地地址):", myip.InternalIP("1.1.1.1", "ip4:icmp"))45	fmt.Println("获取本地地址 (第一个):", myip.LocalIP())46	fmt.Println("获取所有本地地址 (IPv4):", myip.LocalIPv4s())47	fmt.Println("MyIP:", InternalIPv4, InternalIPv6, ExternalIPv4, ExternalIPv6, ExternalIPAny)48}...

1import (2func main() {3	internal.Println("Hello World")4}5import (6func main() {7	internal.Println("Hello World")8}9import (10func main() {11	internal.Println("Hello World")12}

1import (2func main() {3	fmt.Println(stringutil.Reverse("!oG ,olleH"))4}5import (6func main() {7	fmt.Println(stringutil.MyName)8}9import (10func main() {11	fmt.Println(stringutil.MyName)12}13import (14func main() {15	fmt.Println(stringutil.MyName)16}17import (18func main() {19	fmt.Println(stringutil.MyName)20}21import (22func main() {23	fmt.Println(stringutil.MyName)24}25import (26func main() {27	fmt.Println(stringutil.MyName)28}29import (30func main() {31	fmt.Println(stringutil.MyName)32}33import (34func main() {35	fmt.Println(stringutil.MyName)36}37import (38func main()

1import (2func main() {3	fmt.Println("Hello World from internal class")4	internal.Println("Hello World from internal class")5}6import "fmt"7func Println(s string) {8	fmt.Println(s)9}10import (11func main() {12	fmt.Println("Hello World from internal class")13	internal.Println("Hello World from internal class")14}15import "fmt"16func Println(s string) {17	fmt.Println(s)18}19import (20func main() {21	fmt.Println("Hello World from internal class")22	internal.Println("Hello World from internal class")23}24import "fmt"25func Println(s string) {26	fmt.Println(s)27}28import (29func main() {30	fmt.Println("Hello World from internal class")31	internal.Println("Hello World from internal class")32}33import "fmt"34func Println(s string) {35	fmt.Println(s)36}37import (38func main() {39	fmt.Println("Hello World from internal class")40	internal.Println("Hello World from internal class")41}42import "fmt"43func Println(s string) {44	fmt.Println(s)45}46import (47func main() {48	fmt.Println("Hello World from internal class")49	internal.Println("Hello World from internal class")50}

1import (2func main() {3  fmt.Println("Hello World!")4  first.Print()5}6import (7func main() {8  fmt.Println("Hello World!")9  first.Print()10}

1import (2func main() {3    fmt.Println("Hello World")4    pkg.SayHello()5}6import "fmt"7func SayHello() {8    fmt.Println("Hello World")9}10import "fmt"11func SayHello() {12    fmt.Println("Hello World")13}14import (15func main() {16    fmt.Println("Hello World")17    pkg.SayHello()18}19import "fmt"20func SayHello() {21    fmt.Println("Hello World")22}

1import (2func main() {3	internal.Print()4}5import (6func main() {7	internal.Print()8}