Reorganize and refactor, adding integration test for common library stuff

server/src/handler.rs

@@ -1,16 +1,19 @@
 use crate::repository::PasswordDirectory;
-use common::{Request, RESPONSE_NO, RESPONSE_OK};
+use common::request::Request;
 use std::io::{Error, Write};
 use std::os::unix::net::UnixStream;
 
+pub const RESPONSE_NO: [u8; 4] = [0x0, 0x2, b'N', b'O'];
+pub const RESPONSE_OK: [u8; 4] = [0x0, 0x2, b'O', b'K'];
+
 pub struct Handler {
     stream: UnixStream,
     handler: PasswordDirectory,
 }
 
 impl Handler {
-    pub fn new(stream: UnixStream, handler: PasswordDirectory) -> Result<Handler, Error> {
-        Ok(Handler { stream, handler })
+    pub fn new(stream: UnixStream, handler: PasswordDirectory) -> Handler {
+        Handler { stream, handler }
     }
 
     fn communicate(&mut self) -> Result<(), Error> {