Update dependencies/vendor (#1659)

vendor/github.com/minio/minio-go/v7/utils.go

@@ -18,14 +18,17 @@
 package minio
 
 import (
+	"context"
 	"crypto/md5"
 	"encoding/base64"
 	"encoding/hex"
 	"encoding/xml"
+	"errors"
 	"fmt"
 	"hash"
 	"io"
 	"io/ioutil"
+	"math/rand"
 	"net"
 	"net/http"
 	"net/url"
@@ -58,6 +61,26 @@ func amzExpirationToExpiryDateRuleID(expiration string) (time.Time, string) {
 	return time.Time{}, ""
 }
 
+var restoreRegex = regexp.MustCompile(`ongoing-request="(.*?)"(, expiry-date="(.*?)")?`)
+
+func amzRestoreToStruct(restore string) (ongoing bool, expTime time.Time, err error) {
+	matches := restoreRegex.FindStringSubmatch(restore)
+	if len(matches) != 4 {
+		return false, time.Time{}, errors.New("unexpected restore header")
+	}
+	ongoing, err = strconv.ParseBool(matches[1])
+	if err != nil {
+		return false, time.Time{}, err
+	}
+	if matches[3] != "" {
+		expTime, err = time.Parse(http.TimeFormat, matches[3])
+		if err != nil {
+			return false, time.Time{}, err
+		}
+	}
+	return
+}
+
 // xmlDecoder provide decoded value in xml.
 func xmlDecoder(body io.Reader, v interface{}) error {
 	d := xml.NewDecoder(body)
@@ -294,6 +317,16 @@ func ToObjectInfo(bucketName string, objectName string, h http.Header) (ObjectIn
 		}
 	}
 
+	// Nil if not found
+	var restore *RestoreInfo
+	if restoreHdr := h.Get(amzRestore); restoreHdr != "" {
+		ongoing, expTime, err := amzRestoreToStruct(restoreHdr)
+		if err != nil {
+			return ObjectInfo{}, err
+		}
+		restore = &RestoreInfo{OngoingRestore: ongoing, ExpiryTime: expTime}
+	}
+
 	// extract lifecycle expiry date and rule ID
 	expTime, ruleID := amzExpirationToExpiryDateRuleID(h.Get(amzExpiration))
 
@@ -319,6 +352,7 @@ func ToObjectInfo(bucketName string, objectName string, h http.Header) (ObjectIn
 		UserMetadata: userMetadata,
 		UserTags:     userTags,
 		UserTagCount: tagCount,
+		Restore:      restore,
 	}, nil
 }
 
@@ -397,19 +431,20 @@ func getDefaultLocation(u url.URL, regionOverride string) (location string) {
 	return region
 }
 
-var supportedHeaders = []string{
-	"content-type",
-	"cache-control",
-	"content-encoding",
-	"content-disposition",
-	"content-language",
-	"x-amz-website-redirect-location",
-	"x-amz-object-lock-mode",
-	"x-amz-metadata-directive",
-	"x-amz-object-lock-retain-until-date",
-	"expires",
-	"x-amz-replication-status",
+var supportedHeaders = map[string]bool{
+	"content-type":                        true,
+	"cache-control":                       true,
+	"content-encoding":                    true,
+	"content-disposition":                 true,
+	"content-language":                    true,
+	"x-amz-website-redirect-location":     true,
+	"x-amz-object-lock-mode":              true,
+	"x-amz-metadata-directive":            true,
+	"x-amz-object-lock-retain-until-date": true,
+	"expires":                             true,
+	"x-amz-replication-status":            true,
 	// Add more supported headers here.
+	// Must be lower case.
 }
 
 // isStorageClassHeader returns true if the header is a supported storage class header
@@ -419,34 +454,24 @@ func isStorageClassHeader(headerKey string) bool {
 
 // isStandardHeader returns true if header is a supported header and not a custom header
 func isStandardHeader(headerKey string) bool {
-	key := strings.ToLower(headerKey)
-	for _, header := range supportedHeaders {
-		if strings.ToLower(header) == key {
-			return true
-		}
-	}
-	return false
+	return supportedHeaders[strings.ToLower(headerKey)]
 }
 
 // sseHeaders is list of server side encryption headers
-var sseHeaders = []string{
-	"x-amz-server-side-encryption",
-	"x-amz-server-side-encryption-aws-kms-key-id",
-	"x-amz-server-side-encryption-context",
-	"x-amz-server-side-encryption-customer-algorithm",
-	"x-amz-server-side-encryption-customer-key",
-	"x-amz-server-side-encryption-customer-key-MD5",
+var sseHeaders = map[string]bool{
+	"x-amz-server-side-encryption":                    true,
+	"x-amz-server-side-encryption-aws-kms-key-id":     true,
+	"x-amz-server-side-encryption-context":            true,
+	"x-amz-server-side-encryption-customer-algorithm": true,
+	"x-amz-server-side-encryption-customer-key":       true,
+	"x-amz-server-side-encryption-customer-key-md5":   true,
+	// Add more supported headers here.
+	// Must be lower case.
 }
 
 // isSSEHeader returns true if header is a server side encryption header.
 func isSSEHeader(headerKey string) bool {
-	key := strings.ToLower(headerKey)
-	for _, h := range sseHeaders {
-		if strings.ToLower(h) == key {
-			return true
-		}
-	}
-	return false
+	return sseHeaders[strings.ToLower(headerKey)]
 }
 
 // isAmzHeader returns true if header is a x-amz-meta-* or x-amz-acl header.
@@ -486,3 +511,79 @@ func (m hashWrapper) Close() {
 	}
 	m.Hash = nil
 }
+
+const letterBytes = "abcdefghijklmnopqrstuvwxyz01234569"
+const (
+	letterIdxBits = 6                    // 6 bits to represent a letter index
+	letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
+	letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
+)
+
+// randString generates random names and prepends them with a known prefix.
+func randString(n int, src rand.Source, prefix string) string {
+	b := make([]byte, n)
+	// A rand.Int63() generates 63 random bits, enough for letterIdxMax letters!
+	for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
+		if remain == 0 {
+			cache, remain = src.Int63(), letterIdxMax
+		}
+		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
+			b[i] = letterBytes[idx]
+			i--
+		}
+		cache >>= letterIdxBits
+		remain--
+	}
+	return prefix + string(b[0:30-len(prefix)])
+}
+
+// IsNetworkOrHostDown - if there was a network error or if the host is down.
+// expectTimeouts indicates that *context* timeouts are expected and does not
+// indicate a downed host. Other timeouts still returns down.
+func IsNetworkOrHostDown(err error, expectTimeouts bool) bool {
+	if err == nil {
+		return false
+	}
+
+	if errors.Is(err, context.Canceled) {
+		return false
+	}
+
+	if expectTimeouts && errors.Is(err, context.DeadlineExceeded) {
+		return false
+	}
+	// We need to figure if the error either a timeout
+	// or a non-temporary error.
+	urlErr := &url.Error{}
+	if errors.As(err, &urlErr) {
+		switch urlErr.Err.(type) {
+		case *net.DNSError, *net.OpError, net.UnknownNetworkError:
+			return true
+		}
+	}
+	var e net.Error
+	if errors.As(err, &e) {
+		if e.Timeout() {
+			return true
+		}
+	}
+
+	// Fallback to other mechanisms.
+	switch {
+	case strings.Contains(err.Error(), "Connection closed by foreign host"):
+		return true
+	case strings.Contains(err.Error(), "TLS handshake timeout"):
+		// If error is - tlsHandshakeTimeoutError.
+		return true
+	case strings.Contains(err.Error(), "i/o timeout"):
+		// If error is - tcp timeoutError.
+		return true
+	case strings.Contains(err.Error(), "connection timed out"):
+		// If err is a net.Dial timeout.
+		return true
+	case strings.Contains(strings.ToLower(err.Error()), "503 service unavailable"):
+		// Denial errors
+		return true
+	}
+	return false
+}