async-http: Initial sync version

[learn-rust.git] / async-http / src / main.rs

diff --git a/async-http/src/main.rs b/async-http/src/main.rs
new file mode 100644 (file)
index 0000000..09ca609
--- /dev/null
+++ b/async-http/src/main.rs
@@ -0,0 +1,39 @@
+use std::fs;
+use std::io::prelude::*;
+use std::net::TcpListener;
+use std::net::TcpStream;
+
+fn main() {
+    // Listen for incoming TCP connections on localhost port 7878
+    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
+
+    // Block forever, handling each request that arrives at this IP address
+    for stream in listener.incoming() {
+        let stream = stream.unwrap();
+
+        handle_connection(stream);
+    }
+}
+
+fn handle_connection(mut stream: TcpStream) {
+    // Read the first 1024 bytes of data from the stream
+    let mut buffer = [0; 1024];
+    stream.read(&mut buffer).unwrap();
+
+    let get = b"GET / HTTP/1.1\r\n";
+
+    // Respond with greetings or a 404,
+    // depending on the data in the request
+    let (status_line, filename) = if buffer.starts_with(get) {
+        ("HTTP/1.1 200 OK\r\n\r\n", "index.html")
+    } else {
+        ("HTTP/1.1 404 NOT FOUND\r\n\r\n", "404.html")
+    };
+    let contents = fs::read_to_string(filename).unwrap();
+
+    // Write response back to the stream,
+    // and flush the stream to ensure the response is sent back to the client
+    let response = format!("{status_line}{contents}");
+    stream.write_all(response.as_bytes()).unwrap();
+    stream.flush().unwrap();
+}