More TCP Programming Server - Client

Mission:

To design and program two programs one to be a server the other a client with a protocol in between.
Again NO Razor Pages-application.

Background:

The previous exercise Simple Server + Concurrent Server

Domain Description:

The two programs are to use a simple protocol for math (later some timestamps).

E.g.

Assignment A: Client sends 'Add 5 8' as a string -> Server respond 'Result 13'.

Assignment B: Client sends 'Add 5,2 8,4' as a string -> Server respond 'Result 13,6'.

Assignment C: Client sends 'Timestamp&2019-09-03 14:23' as a string -> Server respond 'Valid' or 'Not valid'

Assignment A: Simple math

1. Make a server - of course cuncurrent working on port 3001..
    
2. When receiving the request from client (i.e. en DoClient):
   1. Read the line from client
   2. split the string (Hint: use str.Split(' '))
   3. Parse the second and third part into two integers (Hint: use int32.Parse(str))
   4. add the two integers, send back the result.
       
3. Make a client that can send a request and read the result.
    
4. Commit and push your server-solution to a Git-Repository
    
5. Extra: Extend to handle SUB, MUL and DIV as well
   
   .

Assignment B: More Math now with decimal Numbers

1. Like in Assignment A make a server - this time on port 3002.
    
2. Like in Assignment A split the request into three parts.
   This time when parsing you need to specify if you expecting a dot '.' or a comma ',' as a decimal seperator
   
   If comma use:
   double.Parse(str, new CultureInfo("da-DK"))
   
   if dot use
   double.Parse(str, new CultureInfo("en-UK"))
   
   The rest is the same as in assignmet A.
   
   
3. The client is allmost the same except for the port number.
    
4. Commit your project.
    
5. Extra: Extend to handle SUB, MUL and DIV as well
   

Assignment C: How to handle DataTime

1. Make a server - this time on port 3003.
    
2. When receiving the request from client (i.e. en DoClient):
   1. Read the line from client
       
   2. split the string (Hint: use str.Split('&')) - note that after timestamp there is a colon ':' insted of just a space ' '.
       
3. To parse the date and time into a datetime object use this:
   
   DateTime.ParseExact(dt, "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
   
   For more information see https://docs.microsoft.com/en-us/dotnet/api/system.datetime.parseexact?view=netframework-4.8
    
4. Make a client that can send a request and read the result.
    
5. Commit your project.
    
6. Extra: send back a response of format 'date 03/09 2019 time 14:23'