Control over HTTP

src/main.rs

 use std::net::{TcpListener};
-use std::io::Read;
+use std::io::{Read, Write};
 
 use rppal::hal::Delay;
 use rppal::spi::{Spi, Bus, SlaveSelect, Mode};
@@ -30,13 +30,36 @@ fn main() {
     display.clear(Rgb565::new(255, 255, 255)).unwrap();
     Text::with_alignment("Release the Kraken!", Point::new(120, 120), style, Alignment::Center).draw(&mut display).unwrap();
 
-    let listener = TcpListener::bind("0.0.0.0:8080").unwrap();
+    let listener = TcpListener::bind("0.0.0.0:80").unwrap();
     for stream in listener.incoming() {
         if let Ok(mut stream) = stream {
-            let mut text = String::new();
-            stream.read_to_string(&mut text).unwrap();
-            display.clear(Rgb565::new(255, 255, 255)).unwrap();
-            Text::with_alignment(&text, Point::new(120, 20), style, Alignment::Center).draw(&mut display).unwrap();
+            let mut buf = [0; 1024];
+            let len = stream.read(&mut buf).unwrap();
+            let buf = String::from_utf8_lossy(&buf[0..len]);
+
+            let (head, body) = buf.split_once("\r\n\r\n").unwrap();
+            let (req, _headers) = head.split_once("\r\n").unwrap();
+            let (method, rem) = req.split_once(" ").unwrap();
+            let (uri, _ver) = rem.split_once(" ").unwrap();
+
+            let resp = match (method, uri) {
+                ("PUT", "/id") => {
+                    display.clear(Rgb565::new(255, 255, 255)).unwrap();
+                    Text::with_alignment(&body, Point::new(120, 20), style, Alignment::Center).draw(&mut display).unwrap();
+                    "200 OK"
+                },
+                ("PUT", "/status") => {
+                    display.clear(Rgb565::new(0, 255, 0)).unwrap();
+                    "200 OK"
+                },
+                (m, u) => {
+                    eprintln!("Invalid request: {} {}", m, u);
+                    "404 NOT FOUND"
+                }
+            };
+
+            stream.write(format!("HTTP/1.1 {}\r\n\r\n", resp).as_bytes()).unwrap();
+            stream.flush().unwrap();
         }
     }
 }