Handle ioutil deprecations (#53526)

* replace ioutil.ReadFile -> os.ReadFile

* replace ioutil.ReadAll -> io.ReadAll

* replace ioutil.TempFile -> os.CreateTemp

* replace ioutil.NopCloser -> io.NopCloser

* replace ioutil.WriteFile -> os.WriteFile

* replace ioutil.TempDir -> os.MkdirTemp

* replace ioutil.Discard -> io.Discard

pkg/components/imguploader/azureblobuploader.go

@@ -9,7 +9,6 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 	"net/http"
 	"net/url"
@@ -77,7 +76,7 @@ func (az *AzureBlobUploader) Upload(ctx context.Context, imageDiskPath string) (
 	}()
 
 	if resp.StatusCode > 400 && resp.StatusCode < 600 {
-		body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
+		body, err := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
 		if err != nil {
 			return "", err
 		}
@@ -256,14 +255,15 @@ func tryget(headers map[string][]string, key string) string {
 
 /*
 Based on Azure docs:
-  Link: http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx#Constructing_Element
 
-  1) Retrieve all headers for the resource that begin with x-ms-, including the x-ms-date header.
-  2) Convert each HTTP header name to lowercase.
-  3) Sort the headers lexicographically by header name, in ascending order. Note that each header may appear only once in the string.
-  4) Unfold the string by replacing any breaking white space with a single space.
-  5) Trim any white space around the colon in the header.
-  6) Finally, append a new line character to each canonicalized header in the resulting list. Construct the CanonicalizedHeaders string by concatenating all headers in this list into a single string.
+	Link: http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx#Constructing_Element
+
+	1) Retrieve all headers for the resource that begin with x-ms-, including the x-ms-date header.
+	2) Convert each HTTP header name to lowercase.
+	3) Sort the headers lexicographically by header name, in ascending order. Note that each header may appear only once in the string.
+	4) Unfold the string by replacing any breaking white space with a single space.
+	5) Trim any white space around the colon in the header.
+	6) Finally, append a new line character to each canonicalized header in the resulting list. Construct the CanonicalizedHeaders string by concatenating all headers in this list into a single string.
 */
 func (a *Auth) canonicalizedHeaders(req *http.Request) string {
 	var buffer bytes.Buffer
@@ -288,25 +288,26 @@ func (a *Auth) canonicalizedHeaders(req *http.Request) string {
 
 /*
 Based on Azure docs
-  Link: http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx#Constructing_Element
 
-1) Beginning with an empty string (""), append a forward slash (/), followed by the name of the account that owns the resource being accessed.
-2) Append the resource's encoded URI path, without any query parameters.
-3) Retrieve all query parameters on the resource URI, including the comp parameter if it exists.
-4) Convert all parameter names to lowercase.
-5) Sort the query parameters lexicographically by parameter name, in ascending order.
-6) URL-decode each query parameter name and value.
-7) Append each query parameter name and value to the string in the following format, making sure to include the colon (:) between the name and the value:
-    parameter-name:parameter-value
+		Link: http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx#Constructing_Element
 
-8) If a query parameter has more than one value, sort all values lexicographically, then include them in a comma-separated list:
-    parameter-name:parameter-value-1,parameter-value-2,parameter-value-n
+	 1. Beginning with an empty string (""), append a forward slash (/), followed by the name of the account that owns the resource being accessed.
+	 2. Append the resource's encoded URI path, without any query parameters.
+	 3. Retrieve all query parameters on the resource URI, including the comp parameter if it exists.
+	 4. Convert all parameter names to lowercase.
+	 5. Sort the query parameters lexicographically by parameter name, in ascending order.
+	 6. URL-decode each query parameter name and value.
+	 7. Append each query parameter name and value to the string in the following format, making sure to include the colon (:) between the name and the value:
+	    parameter-name:parameter-value
+
+	 8. If a query parameter has more than one value, sort all values lexicographically, then include them in a comma-separated list:
+	    parameter-name:parameter-value-1,parameter-value-2,parameter-value-n
 
 9) Append a new line character (\n) after each name-value pair.
 
 Rules:
-  1) Avoid using the new line character (\n) in values for query parameters. If it must be used, ensure that it does not affect the format of the canonicalized resource string.
-  2) Avoid using commas in query parameter values.
+ 1. Avoid using the new line character (\n) in values for query parameters. If it must be used, ensure that it does not affect the format of the canonicalized resource string.
+ 2. Avoid using commas in query parameter values.
 */
 func (a *Auth) canonicalizedResource(req *http.Request) string {
 	var buffer bytes.Buffer

pkg/components/imguploader/gcs/gcsuploader.go

@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -75,7 +74,7 @@ func (u *Uploader) Upload(ctx context.Context, imageDiskPath string) (string, er
 	var keyData []byte
 	if u.KeyFile != "" {
 		u.log.Debug("Opening key file ", u.KeyFile)
-		keyData, err = ioutil.ReadFile(u.KeyFile)
+		keyData, err = os.ReadFile(u.KeyFile)
 		if err != nil {
 			return "", err
 		}

pkg/components/imguploader/gcs/gcsuploader_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"testing"
 	"time"
@@ -115,7 +115,7 @@ func TestUploadToGCS_DefaultCredentials(t *testing.T) {
 	content := []byte("test\n")
 	tmpDir := t.TempDir()
 	fpath := filepath.Join(tmpDir, "test.png")
-	err := ioutil.WriteFile(fpath, content, 0600)
+	err := os.WriteFile(fpath, content, 0600)
 	require.NoError(t, err)
 
 	t.Run("Without signed URL", func(t *testing.T) {

pkg/components/imguploader/webdavuploader.go

@@ -4,10 +4,11 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"net/url"
+	"os"
 	"path"
 	"strings"
 	"time"
@@ -58,7 +59,7 @@ func (u *WebdavUploader) Upload(ctx context.Context, imgToUpload string) (string
 	// We can ignore the gosec G304 warning on this one because `imgToUpload` comes
 	// from alert notifiers and is only used to upload images generated by alerting.
 	// nolint:gosec
-	imgData, err := ioutil.ReadFile(imgToUpload)
+	imgData, err := os.ReadFile(imgToUpload)
 	if err != nil {
 		return "", err
 	}
@@ -85,7 +86,7 @@ func (u *WebdavUploader) Upload(ctx context.Context, imgToUpload string) (string
 	}()
 
 	if res.StatusCode != http.StatusCreated {
-		body, err := ioutil.ReadAll(res.Body)
+		body, err := io.ReadAll(res.Body)
 		if err != nil {
 			return "", fmt.Errorf("failed to read response body: %w", err)
 		}