C#•7mo ago

Help me understand

so, im trying to complete codecrafters challenge 'build your own http server'. And I was doing task 'Respond with 200' where i needed to just return 200 code to the client, but it didnt work. After some research I found out that I need to read request data before making a response, but why?

7 Replies

blueberriesiftheywerecatsOP•7mo ago

using System.Net;
using System.Net.Sockets;
using System.Text;

using var server = new TcpListener(IPAddress.Any, 4221);
server.Start();

using var client = server.AcceptTcpClient();

using var s = client.GetStream();

/*
byte[] requestBuffer = new byte[1024];
int bytesRead = s.Read(requestBuffer);
string request = Encoding.UTF8.GetString(requestBuffer, 0, bytesRead);
*/

// wont work without code above

const string msg = "HTTP/1.1 200 OK\r\n\r\n";
byte[] h = Encoding.ASCII.GetBytes(msg);

s.Write(h, 0, h.Length);

using System.Net;
using System.Net.Sockets;
using System.Text;

using var server = new TcpListener(IPAddress.Any, 4221);
server.Start();

using var client = server.AcceptTcpClient();

using var s = client.GetStream();

/*
byte[] requestBuffer = new byte[1024];
int bytesRead = s.Read(requestBuffer);
string request = Encoding.UTF8.GetString(requestBuffer, 0, bytesRead);
*/

// wont work without code above

const string msg = "HTTP/1.1 200 OK\r\n\r\n";
byte[] h = Encoding.ASCII.GetBytes(msg);

s.Write(h, 0, h.Length);

Buddy•7mo ago

https://www.youtube.com/watch?v=7GBlCinu9yg This is a great video, I suggest you watch it

Computerphile

YouTube

Coding a Web Server in 25 Lines - Computerphile

Just how simple can a web server be? Laurence Tratt, Shopify / Royal Academy of Engineering Research Chair in Language Engineering at Kings College London builds it up. More about Laurie: https://bit.ly/C_LaurenceTratt https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. ...

Buddy•7mo ago

He does not use C# but Rust, however the logic and reasoning remains the same

blueberriesiftheywerecatsOP•7mo ago

he explains that reading stuff?

Buddy•7mo ago

Computerphile is very educational Oh, I see. I misread your question. You must read it because it is just a single stream of bytes. There aren't two channels like Send and Receive.

blueberriesiftheywerecatsOP•7mo ago

so when Im reading and then writing Im actually just appending my response to that channel? So it now contains both request and response?

Buddy•7mo ago

From what I have understood, yes.

Gaming

Programming

Help me understand