improved request line-end check

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

core/conn.go

@@ -2,6 +2,7 @@ package core
 
 import (
 	"bufio"
+	"bytes"
 	"io"
 	"net"
 	"time"
@@ -63,14 +64,10 @@ func (c *conn) ReadLine() ([]byte, *errors.Error) {
 		return nil, errors.WrapError(ConnReadErr, err)
 	}
 
-	// Iterate up to '\r\n' or just '\n'
-	end := -1
-	for i := 0; i < count; i++ {
-		if c.b[i] == '\n' ||
-			(c.b[i] == '\r' && i < count-1 && c.b[i+1] == '\n') {
-			end = i
-			break
-		}
+	// Get up to first '\r\n' (or just '\n')
+	end := bytes.IndexByte(c.b[:count], '\n')
+	if end > 0 && c.b[end-1] == '\r' {
+		end--
 	}
 
 	// If end never reached return error,