From a936978cd047d41eae0e51c592ce376dfcc9618e Mon Sep 17 00:00:00 2001
From: dreamscached <dreamscache.d@gmail.com>
Date: Mon, 12 Feb 2024 17:54:10 +0100
Subject: [PATCH] Backport readAll from later Go

---
 io.go    | 21 +++++++++++++++++++++
 query.go |  8 ++++----
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/io.go b/io.go
index 4fb7c8e..6bf2955 100644
--- a/io.go
+++ b/io.go
@@ -33,3 +33,24 @@ func readAllUntilZero(reader io.ByteReader) ([]byte, error) {
 		}
 	}
 }
+
+// readAll reads all bytes from reader.
+// This is a backport from newer Go stdlib for sake of minequery's compatibility with Go 1.13.
+func readAll(r io.Reader) ([]byte, error) {
+	b := make([]byte, 0, 512)
+	for {
+		n, err := r.Read(b[len(b):cap(b)])
+		b = b[:len(b)+n]
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			return b, err
+		}
+
+		if len(b) == cap(b) {
+			// Add more capacity (let append pick how much).
+			b = append(b, 0)[:len(b)]
+		}
+	}
+}
diff --git a/query.go b/query.go
index 9d7e402..f911c68 100644
--- a/query.go
+++ b/query.go
@@ -371,7 +371,7 @@ func (p *Pinger) writeQueryFullStatPacket(conn *net.UDPConn, sessionID int32, to
 
 func (p *Pinger) parseQueryHandshakeResponse(reader io.Reader) (int32, error) {
 	// Read all the remaining data in packet and ensure it has NUL terminator (if UseStrict)
-	token, _ := io.ReadAll(reader)
+	token, _ := readAll(reader)
 	if len(token) == 0 {
 		return 0, fmt.Errorf("challenge token is empty")
 	}
@@ -392,7 +392,7 @@ func (p *Pinger) parseQueryHandshakeResponse(reader io.Reader) (int32, error) {
 
 func (p *Pinger) parseQueryBasicStatResponse(reader io.Reader) (*BasicQueryStatus, error) {
 	// Read all the remaining data and ensure it has NUL terminator (if UseStrict)
-	data, _ := io.ReadAll(reader)
+	data, _ := readAll(reader)
 	if len(data) == 0 {
 		return nil, fmt.Errorf("%w: empty response body", ErrInvalidStatus)
 	}
@@ -437,7 +437,7 @@ func (p *Pinger) parseQueryBasicStatResponse(reader io.Reader) (*BasicQueryStatu
 	}
 
 	// Read host as byte sequence
-	hostBytes, err := io.ReadAll(remReader)
+	hostBytes, err := readAll(remReader)
 	if err != nil {
 		return nil, err
 	}
@@ -454,7 +454,7 @@ func (p *Pinger) parseQueryBasicStatResponse(reader io.Reader) (*BasicQueryStatu
 
 func (p *Pinger) parseQueryFullStatResponse(reader io.Reader) (*FullQueryStatus, error) {
 	// Read all the remaining data and ensure it has NUL terminator (if UseStrict)
-	data, _ := io.ReadAll(reader)
+	data, _ := readAll(reader)
 	if len(data) == 0 {
 		return nil, fmt.Errorf("%w: empty response body", ErrInvalidStatus)
 	}