Fix: drop dep + fix false pos with binary detection

putxt.go

@@ -10,7 +10,6 @@ import (
 	"time"
 
 	"git.tcp.direct/kayos/common/squish"
-	"golang.org/x/tools/godoc/util"
 )
 
 type Handler interface {
@@ -79,7 +78,7 @@ readLoop:
 			return
 		}
 	}
-	if !util.IsText(buf.Bytes()) {
+	if !IsText(buf.Bytes()) {
 		client.writeString(MessageBinaryData)
 		return
 	}

util.go

@@ -0,0 +1,20 @@
+package putxt
+
+import "unicode/utf8"
+
+// slightly modified from golang.org/x/tools/godoc/util to include carriage return for dirty windows users
+func IsText(s []byte) bool {
+	const max = 1024
+	if len(s) > max {
+		s = s[0:max]
+	}
+	for i, c := range string(s) {
+		if i+utf8.UTFMax > len(s) {
+			break
+		}
+		if c == 0xFFFD || c < ' ' && c != '\n' && c != '\t' && c != '\f' && c != '\r' {
+			return false
+		}
+	}
+	return true
+}