KakaoTalk

Basic information

• description: Gachon Univ. 21, Network Term Project - KakaoTalk Clone
• https://www.youtube.com/watch?v=vGXFO11I8CE
• Server : https://github.com/taewan2002/NW_KakaoTalk_Server
• author: 조태완, 김의진, 구승현, 이현우
• version: 1.0.0
• university: Gachon University
• department: Artificial Intelligence
• email: taewan2002@gachon.ac.kr, whitekuj02@gachon.ac.kr, zhdkf2002@gachon.ac.kr, wndo020209@gachon.ac.kr
• last update: 2022-12-14

protocol

• use protocol.java file
• Serializable interface is used

Type 1: make chatting room

• Send to server as chatting_client.java file
• Room name must be unique
• (room in number + members + made time) is hashed by md5 hash

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
ArrayList<String>	list	invite chat members

Type 2 : invite chatting room

• Send to server as chatting_client.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
String	roomnumber	chat room number with md5
ArrayList<String>	list	invite chat members

Type 3 : out chatting room

• Send to server as chatting_client.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
String	roomnumber	chat room number with md5

Type 4 : send message

• Send to server as chatting_client.java file
• every message is cached in server
• message is sent to user when user is online
• message is just cached when user is offline

type	name	description
int	typeofrequest	type of request number
String	roomnumber	chat room number with md5
String	sender	user_id of requst member
String	message	message content
String	time	time when send messege
boolean	file_exist	Determine if a file exists
String	file_path	Storage Location of sended file in server

Type 5 : logout

• Send to server as chatting_client.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member

Type 6 : my room list

• Send to server as get_data.java file
• get room list of user

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member

Type 7 : user list in room

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
String	roomnumber	chat room number with md5

Type 8 : find ID

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	name	user name info
String	phone	user phone number

Type 9 : confirm for passward change

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	id	user id
String	email	user email
String	phone	user phone number

Type 10 : change passward

• Send to server as get_data.java file

type	name	description
type	typeofrequest	type of request number
String	id	user id
String	password	new user password

Type 16 : add friend

• Send to server as chatting_client.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
ArrayList<String>	list	add friend list

Type 50: check online user list

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
ArrayList<String>	list	online user list

Type 51 : request my informaton

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member

Type 53 : delete friend

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member
String	friend	user_id of friend member

Type 54 : request friend list

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member

Type 55 : secession

• Send to server as get_data.java file

type	name	description
int	typeofrequest	type of request number
String	sender	user_id of requst member

Chatting structure

• Chatting room is created when two or more users are chatting

1. user send message to server type 4
2. sever send message to all user in room type 4 and cache message in server
3. user receive message from server type 4 and show message in chat window

• if user is offline, message is cached in server
• if user is online, message is shown in chat window
• if user login, get cached message from server and show message in chat window
• if user logout, cached message is deleted in client

Create room number

• roomnumber: md5(number of members + user_id of members + time)
• https://en.wikipedia.org/wiki/MD5

Create user_id number in server

• user_id: mysql auto increment
• https://dev.mysql.com/doc/refman/5.6/en/innodb-auto-increment-handling.html

Reference

• https://github.com/taewan2002/DB_instagram_server
• https://github.com/taewan2002/DB_instagram
• https://m.blog.naver.com/war2i7i7/220796880477