chore: remove refs to deprecated io/ioutil (#322)

Thanks!

v2/glauth.go

@@ -17,7 +17,6 @@ import (
 	"github.com/rs/zerolog"
 	"gopkg.in/amz.v3/aws"
 	"gopkg.in/amz.v3/s3"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -328,11 +327,11 @@ func parseConfigFile(configFileLocation string) (*config.Config, error) {
 				}
 			*/
 
-			files, _ := ioutil.ReadDir(configFileLocation)
+			files, _ := os.ReadDir(configFileLocation)
 			for _, f := range files {
 				canonicalName := filepath.Join(configFileLocation, f.Name())
 
-				bs, _ := ioutil.ReadFile(canonicalName)
+				bs, _ := os.ReadFile(canonicalName)
 				var curRawCfgStruct interface{}
 				if err := toml.Unmarshal(bs, &curRawCfgStruct); err != nil {
 					return &cfg, err

v2/pkg/frontend/webapi.go

@@ -6,7 +6,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/rs/zerolog"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"regexp"
@@ -100,7 +100,7 @@ func (c *collector) Collect(ch chan<- prometheus.Metric) {
 		return
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		log.Printf("Error reading body of %q: %v", c.url, err)
 		return

v2/pkg/handler/ldapopshelper.go

@@ -6,7 +6,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"github.com/rs/zerolog"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -371,7 +370,7 @@ func (l LDAPOpsHelper) searchMaybeSchemaQuery(h LDAPOpsHandler, baseDN string, s
 	attrs = append(attrs, &ldap.EntryAttribute{Name: "modifiersName", Values: []string{"cn=Directory Manager"}})
 	attrs = append(attrs, &ldap.EntryAttribute{Name: "modifyTimeStamp", Values: []string{"Mar 8, 2021, 12:46:29 PM PST (20210308204629Z)"}})
 	// Iterate through schema attributes provided in schema/ directory
-	filenames, _ := ioutil.ReadDir("schema")
+	filenames, _ := os.ReadDir("schema")
 	for _, filename := range filenames {
 		attributename := new(string)
 		*attributename = filename.Name()

v2/pkg/handler/owncloud.go

@@ -7,7 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"github.com/rs/zerolog"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"strings"
@@ -255,7 +255,7 @@ func (s ownCloudSession) getGroups() ([]msgraph.Group, error) {
 		return nil, err
 	}
 	defer resp.Body.Close()
-	b, err := ioutil.ReadAll(resp.Body)
+	b, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
@@ -326,7 +326,7 @@ func (s ownCloudSession) getUsers(userName string) ([]msgraph.User, error) {
 		return nil, err
 	}
 	defer resp.Body.Close()
-	b, err := ioutil.ReadAll(resp.Body)
+	b, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}