Trim source buffer to how many bytes were read

Cargo.lock

@@ -28,7 +28,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "circe"
-version = "0.1.4"
+version = "0.1.5"
 dependencies = [
  "native-tls",
  "serde",

src/lib.rs

@@ -163,16 +163,19 @@ impl Client {
     fn read_string(&mut self) -> Option<String> {
         let mut buffer = [0u8; 512];
 
-        match self.stream.read(&mut buffer) {
-            Ok(_) => {}
-            Err(_) => return None,
+        let num_bytes = match self.stream.read(&mut buffer) {
+            Ok(b) => b,
+            Err(_) => 0,
         };
 
-        let res = String::from_utf8_lossy(&buffer);
+        if num_bytes == 0 {
+            return None;
+        }
 
-        // The trimming is required because if the message is less than 512 bytes it will be
-        // padded with a bunch of 0u8 because of the pre-allocated buffer
-        Some(res.trim().trim_matches(char::from(0)).trim().into())
+        // Slice to the number of bytes that were actually read
+        let res = String::from_utf8_lossy(&buffer[..num_bytes]);
+
+        Some(res.into())
     }
 
     /// Read data coming from the IRC as a [`commands::Command`].

src/main.rs

@@ -30,7 +30,7 @@ fn main() -> Result<(), std::io::Error> {
                 if message.contains("!close") {
                     client.part("#main")?;
                 }
-                println!("PRIVMSG received from {}: {} {}", nick, channel, message);
+                println!("PRIVMSG received from {}: {} {:#?}", nick, channel, message);
             }
         }
     }