websocket: move library files to root of module

vlib/net/websocket/handshake.v

@@ -0,0 +1,72 @@
+module websocket
+
+fn (ws mut Client) read_handshake(seckey string){
+	l.d("reading handshake...")
+	mut bytes_read := 0
+	max_buffer := 256
+	buffer_size := 1
+	mut buffer := malloc(max_buffer)
+
+	for bytes_read <= max_buffer {
+		res := ws.read_from_server(buffer + bytes_read, buffer_size)
+		if res == 0 || res == -1 { 
+			l.f("read_handshake: Failed to read handshake.")
+		}
+		if buffer[bytes_read] == `\n` && buffer[bytes_read-1] == `\r` && buffer[bytes_read-2] == `\n` && buffer[bytes_read-3] == `\r` {
+			break
+		}
+		bytes_read += buffer_size
+	}
+	buffer[max_buffer+1] = `\0`
+	ws.handshake_handler(string(byteptr(buffer)), seckey)
+}
+
+fn (ws mut Client) handshake_handler(handshake_response, seckey string){
+	l.d("handshake_handler:\r\n${handshake_response}")
+	lines := handshake_response.split_into_lines()
+	
+	header := lines[0]
+	if !header.starts_with("HTTP/1.1 101") && !header.starts_with("HTTP/1.0 101") {
+		l.f("handshake_handler: invalid HTTP status response code")
+	}
+
+	for i in 1..lines.len {
+		if lines[i].len <= 0 || lines[i] == "\r\n" {
+			continue
+		}
+		keys := lines[i].split(":")
+
+		match keys[0] {
+			"Upgrade" {
+				ws.flags << Flag.has_upgrade
+			}
+			"Connection" {
+				ws.flags << Flag.has_connection
+			}
+			"Sec-WebSocket-Accept" {
+				l.d("comparing hashes")
+				response := create_key_challenge_response(seckey)
+				if keys[1].trim_space() != response {
+					l.e("handshake_handler: Sec-WebSocket-Accept header does not match computed sha1/base64 response.")
+				}
+				ws.flags << Flag.has_accept
+				unsafe {
+					response.free()
+				}
+			} else {}
+		}
+		unsafe {
+			keys.free()
+		}
+	}
+	if ws.flags.len < 3 {
+		ws.close(1002, "invalid websocket HTTP headers")
+		l.e("invalid websocket HTTP headers")
+	}
+	l.i("handshake successful!")
+	unsafe {
+		handshake_response.free()
+		lines.free()
+		header.free()
+	}
+}