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use std::net::{TcpListener, TcpStream};
use std::str;
use std::collections::HashMap;
use std::fmt;
enum HttpMethod {
GET, POST
}
impl fmt::Display for HttpMethod {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
HttpMethod::GET => write!(f, "GET"),
HttpMethod::POST => write!(f, "POST")
}
}
}
impl HttpMethod {
pub fn parse(s: String) -> Option<HttpMethod> {
if s == "GET" {
return Some(HttpMethod::GET);
}
else if s == "POST" {
return Some(HttpMethod::POST);
}
else {
return None;
}
}
}
struct Request {
method: HttpMethod,
path: String,
http_version: String,
headers: HashMap<String, String>,
// body: &'a [u8]
}
impl Request {
pub fn new( method: HttpMethod
, path: String
, http_version: String
, headers: HashMap<String, String>) -> Request {
return Request {
method,
path,
http_version,
headers
};
}
pub fn print(&self) {
println!("Request({}, {})", self.method, self.path);
}
}
struct Response {
status: i32,
headers: HashMap<String, String>,
body: String
}
impl Response {
pub fn new(body: &str) -> Response {
let headers: HashMap<String, String> = HashMap::new();
return Response {
status: 200,
headers: headers,
body: String::from(body)
};
}
}
fn do_get(request: Request) -> Response {
return Response::new("hey");
}
fn do_post(request: Request) -> Response {
return Response::new("hey");
}
// TODO(andrew): Add some error handling.
fn parse_request(data: &str) -> Option<Request> {
let lines = data.split("\r\n").collect::<Vec<&str>>();
let mut headers: HashMap<String, String> = HashMap::new();
for line in &lines[1..] {
let line = line.split(": ").collect::<Vec<&str>>();
headers.insert(String::from(line[0]), line[1..].join(" "));
}
let first_line = lines[0].split(" ").collect::<Vec<&str>>();
let method = String::from(first_line[0]);
match HttpMethod::parse(method) {
Some(method) =>
return Some(Request::new(
method,
String::from(first_line[1]),
String::from(first_line[2]),
headers )),
None => return None
};
}
fn format_response<'a>(response: Response) -> &'a [u8] {
let buf: &[u8];
buf = &[0; 1024];
return buf;
}
fn handle_client(stream: TcpStream) {
let mut buf: [u8; 1024] = [0; 1024];
stream.peek(&mut buf).expect("Couldn't read from socket");
let s = match str::from_utf8(&buf) {
Ok(v) => v,
Err(_e) => panic!("Couldn't convert u8 to character")
};
let request = parse_request(&s);
// TODO(andrew): remove panic!.
let request = match request {
Some(r) => r,
None => panic!("Request parsed with errors")
};
let response = match request.method {
HttpMethod::GET => do_get(request),
HttpMethod::POST => do_post(request)
};
let response = format_response(response);
}
fn main() -> std::io::Result<()> {
let listener = TcpListener::bind("localhost:3000")?;
// accept connections and process them serially
for stream in listener.incoming() {
handle_client(stream?);
}
Ok(())
}
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