Move from deprecated ioutil to os and io packages (#4364)

4 files changed, 6 insertions, 9 deletions

diff --git a/modules/caddyhttp/reverseproxy/fastcgi/client.go b/modules/caddyhttp/reverseproxy/fastcgi/client.go
index 94df0c7..0772053 100644
--- a/modules/caddyhttp/reverseproxy/fastcgi/client.go
+++ b/modules/caddyhttp/reverseproxy/fastcgi/client.go
@@ -30,7 +30,6 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
-	"io/ioutil"
 	"mime/multipart"
 	"net"
 	"net/http"
@@ -445,7 +444,7 @@ func (c *FCGIClient) Request(p map[string]string, req io.Reader) (resp *http.Res
 	if chunked(resp.TransferEncoding) {
 		resp.Body = clientCloser{c, httputil.NewChunkedReader(rb)}
 	} else {
-		resp.Body = clientCloser{c, ioutil.NopCloser(rb)}
+		resp.Body = clientCloser{c, io.NopCloser(rb)}
 	}
 	return
 }
diff --git a/modules/caddyhttp/reverseproxy/fastcgi/client_test.go b/modules/caddyhttp/reverseproxy/fastcgi/client_test.go
index f0740a4..ef3474d 100644
--- a/modules/caddyhttp/reverseproxy/fastcgi/client_test.go
+++ b/modules/caddyhttp/reverseproxy/fastcgi/client_test.go
@@ -26,7 +26,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"math/rand"
 	"net"
@@ -166,7 +165,7 @@ func sendFcgi(reqType int, fcgiParams map[string]string, data []byte, posts map[
 	}
 
 	defer resp.Body.Close()
-	content, _ = ioutil.ReadAll(resp.Body)
+	content, _ = io.ReadAll(resp.Body)
 
 	log.Println("c: send data length ≈", length, string(content))
 	fcgi.Close()
diff --git a/modules/caddyhttp/reverseproxy/healthchecks.go b/modules/caddyhttp/reverseproxy/healthchecks.go
index 8d5bd77..230bf3a 100644
--- a/modules/caddyhttp/reverseproxy/healthchecks.go
+++ b/modules/caddyhttp/reverseproxy/healthchecks.go
@@ -18,7 +18,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net"
 	"net/http"
@@ -282,7 +281,7 @@ func (h *Handler) doActiveHealthCheck(dialInfo DialInfo, hostAddr string, host H
 	}
 	defer func() {
 		// drain any remaining body so connection could be re-used
-		_, _ = io.Copy(ioutil.Discard, body)
+		_, _ = io.Copy(io.Discard, body)
 		resp.Body.Close()
 	}()
 
@@ -313,7 +312,7 @@ func (h *Handler) doActiveHealthCheck(dialInfo DialInfo, hostAddr string, host H
 
 	// if body does not match regex, mark down
 	if h.HealthChecks.Active.bodyRegexp != nil {
-		bodyBytes, err := ioutil.ReadAll(body)
+		bodyBytes, err := io.ReadAll(body)
 		if err != nil {
 			h.HealthChecks.Active.logger.Info("failed to read response body",
 				zap.String("host", hostAddr),
diff --git a/modules/caddyhttp/reverseproxy/httptransport.go b/modules/caddyhttp/reverseproxy/httptransport.go
index 1932851..35bc947 100644
--- a/modules/caddyhttp/reverseproxy/httptransport.go
+++ b/modules/caddyhttp/reverseproxy/httptransport.go
@@ -20,10 +20,10 @@ import (
 	"crypto/x509"
 	"encoding/base64"
 	"fmt"
-	"io/ioutil"
 	weakrand "math/rand"
 	"net"
 	"net/http"
+	"os"
 	"reflect"
 	"time"
 
@@ -364,7 +364,7 @@ func (t TLSConfig) MakeTLSClientConfig(ctx caddy.Context) (*tls.Config, error) {
 			rootPool.AddCert(caCert)
 		}
 		for _, pemFile := range t.RootCAPEMFiles {
-			pemData, err := ioutil.ReadFile(pemFile)
+			pemData, err := os.ReadFile(pemFile)
 			if err != nil {
 				return nil, fmt.Errorf("failed reading ca cert: %v", err)
 			}