Name: Homework 3 - Social Service: Server
SKU: 23932
Price: 24.99 USD
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Description

5/5 – (2 votes)

Description

In this assignment, you are going to create a server side program of a social service. Your program should be able to handle request from your homework 2 program, and return the correct response.

Requirement

The service accept the following commands:

Request Format	Description	Return to client (in JSON format)

register <id><password>	Register with id and password.	Success	{
	● <id> must be unique.		“status”: 0,
	● Password has no limitation.		“message”: “Success!”
			}

		Fail	{
			“status”: 1,
			“message”: “<id>is already used”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: register <id><password>”
			}

login <id><password>	Login with the id and password, and return an	Success	{
	access token. If there’s already an access token		“status”: 0,
	exist, you should just return that one.		“token”: “11d28a07-2091-4c57-ba46-7fb1bc488cd6”,
	● Access token must be unique.		“message”: “Success!”
			}

		Fail	{
			“status”: 1,
			“message”: “No such user or password error”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: login <id><password>”
			}

delete <token>	Delete a user account. All the relative data will be	Success	{
	deleted, such as posts, friends and tokens.		“status”: 0,
			“message”: “Success!”
			}

		Fail	{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: delete <user>”
			}

logout <token>	Logout the user (Invalidate the current access token)	Success	{
			“status”: 0,
			“message”: “Bye!”
			}

		Fail	{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,

			“message”: “Usage: logout <user>”
			}

invite <token><id>	Invite <id>to become your friend.	Success	{
	● If <id>has already invited you, you are not		“status”: 0,
	able to invite <id>.		“message”: “Success!”
	● You cannot invite yourself.		}

		Fail	{
			“status”: 1,
			“message”: “<id>is already your friend”
			}
			or
			{
			“status”: 1,
			“message”: “<id>does not exist”
			}
			or
			{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,
			“message”: “You cannot invite yourself”
			}
			or
			{
			“status”: 1,
			“message”: “Already invited”
			}
			or
			{
			“status”: 1,
			“message”: “<id> has invited you”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: invite <user><id>”
			}

list-invite <token>	List all the users who invited you to become friends.	Success	{
			“status”: 0,
			“invite”: [
			user_A,
			user_B
			]
			}

		Fail	{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: list-invite <user>”
			}

accept-invite <token><id>	Accept the <id>’sfriend invitation.	Success	{
			“status”: 0,
			“message”: “Success!”
			}

		Fail	{
			“status”: 1,
			“message”: “<id>did not invite you”
			}
			or
			{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{

			“status”: 1,
			“message”: “Usage: accept-invite <user><id>”
			}

list-friend <token>	List all your friends.	Success	{
			“status”: 0,
			“friend”: [
			user_A,
			user_B
			]
			}

		Fail	{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: list-friend <user>”
			}

post <token><message>	Share a post with your friends	Success	{
	● <message> accept spaces		“status”: 0,
			“message”: “Success!”
			}

		Fail	{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: post <user><message>”
			}

receive-post <token>	Receive the posts from your friends.	Success	{
			“status”: 0,
			“post”: [
			{
			“id”: user_A,
			“message”: “I have no friends”
			},
			{
			“id”: user_B,
			“message”: “I have no friends too”
			}
			]
			}

		Fail	{
			“status”: 1,
			“message”: “Not login yet”
			}
			or
			{
			“status”: 1,
			“message”: “Usage: receive-post <user>”
			}

General

In order to serve the clients, your server program mustaccept two command line arguments: ip and port.

Your program have to handle the requests above and reply the appropriate response. Therefore, you may have to manage a databaseto store the data. Please design the tables by yourself.

For the commands that contain <token>field, your server should first validate the token, and manage the resources based on token owner.

The response format mustbe JSON format.

If online users delete their accounts, you mustalso logout the account.

The message in post command allows spaces.

Please note that you will need to serve more commands in homework 4. Take care about the extensibility and readability.

Sample Input

invite testA testB

accept-invite testB testA

invite testB testC

accept-invite testC testB

list-friend testA

list-friend testB

list-friend testC

post testA Hi I am A

post testB Hi I am B

post testC Hi I am C

receive-post testA

receive-post testB

receive-post testC

delete testA

delete testB

delete testC

exit

Sample Output

Success!

testB

testA

testC

testB

Success!

testB: Hi I am B

testA: Hi I am A

testC: Hi I am C

testB: Hi I am B

Success!

Grade (100%)

Able to open a service through command line arguments – (5%)

Able to deal with unknown command and arguments – (5%)

Each command: 9%, 10 commands in total – (90%)

Submit

Please upload a zip file called “hw3_{$student_id}.zip” that includes your source code. Submission that don’t follow the rule will get 20% punishment on the grade.

Demo time will be announced before the deadline. You are not allowed to modify your code after demo. Please submit your code on time.

If you have any questions, please ask your questions on course forum(https://e3new.nctu.edu.tw/)

Reference