Added Bucket routes and bucket logic

utils/utils.go

@@ -0,0 +1,54 @@
+package utils
+
+import (
+	"encoding/xml"
+	"fs/models"
+	"sort"
+	"strings"
+	"time"
+)
+
+func ConstructXMLResponseForObjectList(bucket string, objects []*models.ObjectManifest) (string, error) {
+	result := models.ListBucketResult{
+		Xmlns:       "http://s3.amazonaws.com/doc/2006-03-01/",
+		Name:        bucket,
+		Prefix:      "",
+		KeyCount:    len(objects),
+		MaxKeys:     1000,
+		IsTruncated: false,
+	}
+
+	prefixSet := make(map[string]struct{})
+
+	for _, object := range objects {
+		result.Contents = append(result.Contents, models.Contents{
+			Key:          object.Key,
+			LastModified: time.Unix(object.CreatedAt, 0).UTC().Format("2006-01-02T15:04:05.000Z"),
+			ETag:         "\"" + object.ETag + "\"",
+			Size:         object.Size,
+			StorageClass: "STANDARD",
+		})
+
+		if strings.Contains(object.Key, "/") {
+			parts := strings.SplitN(object.Key, "/", 2)
+			prefixSet[parts[0]+"/"] = struct{}{}
+		}
+	}
+
+	prefixes := make([]string, 0, len(prefixSet))
+	for prefix := range prefixSet {
+		prefixes = append(prefixes, prefix)
+	}
+	sort.Strings(prefixes)
+
+	for _, prefix := range prefixes {
+		result.CommonPrefixes = append(result.CommonPrefixes, models.CommonPrefixes{Prefix: prefix})
+	}
+
+	output, err := xml.MarshalIndent(result, "", "    ")
+	if err != nil {
+		return "", err
+	}
+
+	return xml.Header + string(output), nil
+}