From 956dbf375a4f553032f382c0c846b26815881265 Mon Sep 17 00:00:00 2001
From: "Christoph J. Scherr" <Christoph.Scherr@newtec.de>
Date: Fri, 19 Jan 2024 14:21:19 +0100
Subject: [PATCH] progress with the reads

---
 src/server/mod.rs | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/src/server/mod.rs b/src/server/mod.rs
index 5508799..54b9201 100644
--- a/src/server/mod.rs
+++ b/src/server/mod.rs
@@ -44,8 +44,9 @@ impl Server {
     }
 
     async fn handle_stream(&self, stream: (TcpStream, SocketAddr)) -> Result<()> {
+        const BUF_SIZE: usize = 1024;
         info!("start handling stream {:?}", stream.1);
-        let mut buf = Vec::new();
+        let mut buf = [0u8; BUF_SIZE];
         let mut reader = BufReader::new(stream.0);
         let mut len;
         loop {
@@ -61,7 +62,7 @@ impl Server {
                     humanbytes(len),
                     self.decode(&buf)?
                 );
-                buf.clear();
+                buf = [0; BUF_SIZE];
             }
         }
         info!("stop handling stream {:?}", stream.1);
@@ -69,14 +70,14 @@ impl Server {
     }
 
     #[inline]
-    fn decode(&self, buf: &Vec<u8>) -> Result<String> {
-        Ok(String::from_utf8(buf.clone())?)
+    fn decode(&self, buf: &[u8]) -> Result<String> {
+        Ok(std::str::from_utf8(buf)?.to_string())
     }
 
-    async fn read(&self, reader: &mut BufReader<TcpStream>, buf: &mut Vec<u8>) -> Result<usize> {
+    async fn read(&self, reader: &mut BufReader<TcpStream>, buf: &mut [u8]) -> Result<usize> {
         let mut len: usize;
         let mut failsafe: u8 = 0;
-        while failsafe < u8::MAX {
+        while failsafe < 5 {
             trace!("loop");
             len = match timeout(self.cfg.timeout, reader.read(buf)).await {
                 Ok(inner) => {
@@ -98,8 +99,15 @@ impl Server {
         Err(anyhow!("read too often, so the failsafe activated"))
     }
 
-    fn should_end(&self, buf: &Vec<u8>) -> bool {
-        debug!("eval should end: {:?}", buf);
-        buf.contains(&0x00)
+    fn should_end(&self, buf: &[u8]) -> bool {
+        let mut lb: u8 = buf[0];
+        let mut iter = buf.iter().skip(1).peekable();
+        while let Some(b) = iter.next() {
+            if lb != 0 && *b == 0 && **iter.peek().unwrap() == 0 {
+                return true
+            }
+            lb = *b;
+        }
+        return false
     }
 }