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minio/cmd/gateway-gcs-anonymous.go

143 lines
4.7 KiB

/*
* Minio Cloud Storage, (C) 2017 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"fmt"
"io"
"net/http"
"strconv"
"time"
)
func toGCSPublicURL(bucket, object string) string {
return fmt.Sprintf("https://storage.googleapis.com/%s/%s", bucket, object)
}
// AnonGetObject - Get object anonymously
func (l *gcsGateway) AnonGetObject(bucket string, object string, startOffset int64, length int64, writer io.Writer) error {
req, err := http.NewRequest("GET", toGCSPublicURL(bucket, object), nil)
if err != nil {
return gcsToObjectError(traceError(err), bucket, object)
}
if length > 0 && startOffset > 0 {
req.Header.Add("Range", fmt.Sprintf("bytes=%d-%d", startOffset, startOffset+length-1))
} else if startOffset > 0 {
req.Header.Add("Range", fmt.Sprintf("bytes=%d-", startOffset))
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return gcsToObjectError(traceError(err), bucket, object)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusPartialContent && resp.StatusCode != http.StatusOK {
return gcsToObjectError(traceError(anonErrToObjectErr(resp.StatusCode, bucket, object)), bucket, object)
}
_, err = io.Copy(writer, resp.Body)
return gcsToObjectError(traceError(err), bucket, object)
}
// AnonGetObjectInfo - Get object info anonymously
func (l *gcsGateway) AnonGetObjectInfo(bucket string, object string) (objInfo ObjectInfo, err error) {
resp, err := http.Head(toGCSPublicURL(bucket, object))
if err != nil {
return objInfo, gcsToObjectError(traceError(err), bucket, object)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return objInfo, gcsToObjectError(traceError(anonErrToObjectErr(resp.StatusCode, bucket, object)), bucket, object)
}
var contentLength int64
contentLengthStr := resp.Header.Get("Content-Length")
if contentLengthStr != "" {
contentLength, err = strconv.ParseInt(contentLengthStr, 0, 64)
if err != nil {
return objInfo, gcsToObjectError(traceError(errUnexpected), bucket, object)
}
}
t, err := time.Parse(time.RFC1123, resp.Header.Get("Last-Modified"))
if err != nil {
return objInfo, traceError(err)
}
objInfo.ModTime = t
objInfo.Bucket = bucket
objInfo.UserDefined = make(map[string]string)
if resp.Header.Get("Content-Encoding") != "" {
objInfo.UserDefined["Content-Encoding"] = resp.Header.Get("Content-Encoding")
}
objInfo.UserDefined["Content-Type"] = resp.Header.Get("Content-Type")
objInfo.ETag = resp.Header.Get("Etag")
objInfo.ModTime = t
objInfo.Name = object
objInfo.Size = contentLength
return
}
// AnonListObjects - List objects anonymously
func (l *gcsGateway) AnonListObjects(bucket string, prefix string, marker string, delimiter string, maxKeys int) (ListObjectsInfo, error) {
result, err := l.anonClient.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
if err != nil {
return ListObjectsInfo{}, s3ToObjectError(traceError(err), bucket)
}
return fromMinioClientListBucketResult(bucket, result), nil
}
// AnonListObjectsV2 - List objects in V2 mode, anonymously
func (l *gcsGateway) AnonListObjectsV2(bucket, prefix, continuationToken, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (ListObjectsV2Info, error) {
// Request V1 List Object to the backend
result, err := l.anonClient.ListObjects(bucket, prefix, continuationToken, delimiter, maxKeys)
if err != nil {
return ListObjectsV2Info{}, s3ToObjectError(traceError(err), bucket)
}
// translate V1 Result to V2Info
return fromMinioClientListBucketResultToV2Info(bucket, result), nil
}
// AnonGetBucketInfo - Get bucket metadata anonymously.
func (l *gcsGateway) AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, err error) {
resp, err := http.Head(toGCSPublicURL(bucket, ""))
if err != nil {
return bucketInfo, gcsToObjectError(traceError(err))
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return bucketInfo, gcsToObjectError(traceError(anonErrToObjectErr(resp.StatusCode, bucket)), bucket)
}
t, err := time.Parse(time.RFC1123, resp.Header.Get("Last-Modified"))
if err != nil {
return bucketInfo, traceError(err)
}
// Last-Modified date being returned by GCS
return BucketInfo{
Name: bucket,
Created: t,
}, nil
}