Adding upstream version 0.28.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tools/filesystem/internal/s3blob/s3/error.go

@@ -0,0 +1,49 @@
+package s3
+
+import (
+	"encoding/xml"
+	"strconv"
+	"strings"
+)
+
+var _ error = (*ResponseError)(nil)
+
+// ResponseError defines a general S3 response error.
+//
+// https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
+type ResponseError struct {
+	XMLName   xml.Name `json:"-" xml:"Error"`
+	Code      string   `json:"code" xml:"Code"`
+	Message   string   `json:"message" xml:"Message"`
+	RequestId string   `json:"requestId" xml:"RequestId"`
+	Resource  string   `json:"resource" xml:"Resource"`
+	Raw       []byte   `json:"-" xml:"-"`
+	Status    int      `json:"status" xml:"Status"`
+}
+
+// Error implements the std error interface.
+func (err *ResponseError) Error() string {
+	var strBuilder strings.Builder
+
+	strBuilder.WriteString(strconv.Itoa(err.Status))
+	strBuilder.WriteString(" ")
+
+	if err.Code != "" {
+		strBuilder.WriteString(err.Code)
+	} else {
+		strBuilder.WriteString("S3ResponseError")
+	}
+
+	if err.Message != "" {
+		strBuilder.WriteString(": ")
+		strBuilder.WriteString(err.Message)
+	}
+
+	if len(err.Raw) > 0 {
+		strBuilder.WriteString("\n(RAW: ")
+		strBuilder.Write(err.Raw)
+		strBuilder.WriteString(")")
+	}
+
+	return strBuilder.String()
+}