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use std::collections::HashMap;
use std::io::{Read, Write};
use std::net::{TcpListener, TcpStream};
use std::str;
use itertools::Itertools;
enum StatusCode {
// 2xx Success
Ok,
// Created = 201,
// Accepted = 202,
// NonAuthoritative = 203,
// NoContent = 204,
// ResetContent = 205,
// PartialContent = 206,
// 4xx Client Error
BadRequest,
NotFound,
}
#[derive(Debug)]
enum HTTPMethod {
Get(String),
Post(String),
Put(String),
}
impl From<StatusCode> for String {
fn from(val: StatusCode) -> Self {
use StatusCode::*;
match val {
Ok => "200 OK".to_string(),
BadRequest => "400 Bad Request".to_string(),
NotFound => "404 Not Found".to_string(),
}
}
}
impl From<HTTPMethod> for String {
fn from(val: HTTPMethod) -> Self {
use HTTPMethod::*;
match val {
Get(target) => "GET".to_string() + &target,
Post(target) => "POST".to_string() + &target,
Put(target) => "PUT".to_string() + &target,
}
}
}
#[derive(Debug)]
struct Headers(HashMap<String, String>);
impl From<&[&str]> for Headers {
fn from(value: &[&str]) -> Self {
let mut header_map = HashMap::new();
for header in value.iter().filter(|val| !val.is_empty()) {
let (key, val) = header.split_once(':').expect("Should be splitable by :");
header_map.insert(key.to_string(), val.to_string());
}
Headers(header_map)
}
}
impl From<&str> for HTTPMethod {
fn from(val: &str) -> Self {
use HTTPMethod::*;
let request_line = val.split(' ').collect_vec();
let (method, target) = (request_line[0], request_line[1]);
match method {
"GET" => Get(target.to_string()),
"POST" => Post(target.to_string()),
_ => {
eprintln!("{method} Not Supported Yet");
unreachable!()
}
}
}
}
#[derive(Debug)]
struct Request {
method: HTTPMethod,
headers: Option<Headers>,
body: Option<String>,
}
impl Request {
fn new(method: HTTPMethod, headers: Headers, body: String) -> Self {
let headers = if headers.0.len() == 0 {
None
} else {
Some(headers)
};
let body = if body.is_empty() { None } else { Some(body) };
Request {
method,
headers,
body,
}
}
}
impl From<&str> for Request {
fn from(val: &str) -> Self {
let request: Vec<&str> = val.split("\r\n").collect();
match &request[..] {
[request_line, headers @ .., body] => {
let (method, headers, body) = (
HTTPMethod::from(*request_line),
Headers::from(headers),
body.to_string(),
);
Request::new(method, headers, body)
}
_ => {
unreachable!();
}
}
}
}
struct Response {
version: String,
status: StatusCode,
body: Option<String>,
}
impl Response {
fn new(version: String, status: StatusCode, body: Option<String>) -> Self {
Response {
version,
status,
body,
}
}
}
impl Into<String> for Response {
fn into(self) -> String {
format!(
"HTTP/{} {}\r\n{}\r\n",
self.version,
String::from(self.status),
self.body.unwrap_or("".to_string())
)
}
}
fn handle_client(mut stream: TcpStream) {
// Buffer to store the data received from the client
let mut buffer = [0; 512];
// Read data from the stream
match stream.read(&mut buffer) {
Ok(_) => {
// Convert buffer to a string and print the received data
if let Ok(request) = str::from_utf8(&buffer) {
println!("Received request: {}", request);
let request = Request::from(request);
println!("Request after parsing: {:?}", request);
let succses: String = Response::new("1.1".to_string(), StatusCode::Ok, None).into();
let succses = succses.as_bytes();
let not_found: String =
Response::new("1.1".to_string(), StatusCode::NotFound, None).into();
let not_found = not_found.as_bytes();
match request.method {
HTTPMethod::Get(target) => match target.as_str() {
"/" => match stream.write(succses) {
Ok(_) => println!("Response sent successfully"),
Err(e) => eprintln!("Failed to send response: {}", e),
},
_ => match stream.write(not_found) {
Ok(_) => println!("Response sent successfully"),
Err(e) => eprintln!("Failed to send response: {}", e),
},
},
HTTPMethod::Post(target) => todo!(),
HTTPMethod::Put(target) => todo!(),
}
}
// Prepare a response
// let response = b"HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\nHello, world!";
//
}
Err(e) => {
eprintln!("Failed to read from stream: {}", e);
}
}
}
fn main() {
let listener = TcpListener::bind("127.0.0.1:4221").unwrap();
for stream in listener.incoming() {
match stream {
Ok(stream) => {
// println!("accepted new connection");
handle_client(stream)
}
Err(e) => {
eprintln!("error: {}", e);
}
}
}
}
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