Refactor into_string body reading

src/response.rs

@@ -335,10 +335,10 @@ impl Response {
     ///
     pub fn into_string(self) -> io::Result<String> {
         #[cfg(feature = "charset")]
-        {
         let encoding = Encoding::for_label(self.charset().as_bytes())
             .or_else(|| Encoding::for_label(DEFAULT_CHARACTER_SET.as_bytes()))
             .unwrap();
+
         let mut buf: Vec<u8> = vec![];
         self.into_reader()
             .take((INTO_STRING_LIMIT + 1) as u64)
@@ -349,21 +349,14 @@ impl Response {
                 "response too big for into_string",
             ));
         }
+
+        #[cfg(feature = "charset")]
+        {
             let (text, _, _) = encoding.decode(&buf);
             Ok(text.into_owned())
         }
         #[cfg(not(feature = "charset"))]
         {
-            let mut buf: Vec<u8> = vec![];
-            self.into_reader()
-                .take((INTO_STRING_LIMIT + 1) as u64)
-                .read_to_end(&mut buf)?;
-            if buf.len() > INTO_STRING_LIMIT {
-                return Err(io::Error::new(
-                    io::ErrorKind::Other,
-                    "response too big for into_string",
-                ));
-            }
             Ok(String::from_utf8_lossy(&buf).to_string())
         }
     }