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146 lines
4.9 KiB
146 lines
4.9 KiB
/*
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* Minio Cloud Storage, (C) 2017 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package gcs
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import (
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"fmt"
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"io"
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"net/http"
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"strconv"
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"time"
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"github.com/minio/minio/pkg/errors"
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minio "github.com/minio/minio/cmd"
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)
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func toGCSPublicURL(bucket, object string) string {
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return fmt.Sprintf("https://storage.googleapis.com/%s/%s", bucket, object)
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}
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// AnonGetObject - Get object anonymously
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func (l *gcsGateway) AnonGetObject(bucket string, object string, startOffset int64, length int64, writer io.Writer) error {
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req, err := http.NewRequest("GET", toGCSPublicURL(bucket, object), nil)
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if err != nil {
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return gcsToObjectError(errors.Trace(err), bucket, object)
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}
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if length > 0 && startOffset > 0 {
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req.Header.Add("Range", fmt.Sprintf("bytes=%d-%d", startOffset, startOffset+length-1))
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} else if startOffset > 0 {
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req.Header.Add("Range", fmt.Sprintf("bytes=%d-", startOffset))
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}
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return gcsToObjectError(errors.Trace(err), bucket, object)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusPartialContent && resp.StatusCode != http.StatusOK {
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return gcsToObjectError(errors.Trace(minio.AnonErrToObjectErr(resp.StatusCode, bucket, object)), bucket, object)
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}
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_, err = io.Copy(writer, resp.Body)
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return gcsToObjectError(errors.Trace(err), bucket, object)
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}
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// AnonGetObjectInfo - Get object info anonymously
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func (l *gcsGateway) AnonGetObjectInfo(bucket string, object string) (objInfo minio.ObjectInfo, err error) {
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resp, err := http.Head(toGCSPublicURL(bucket, object))
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if err != nil {
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return objInfo, gcsToObjectError(errors.Trace(err), bucket, object)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return objInfo, gcsToObjectError(errors.Trace(minio.AnonErrToObjectErr(resp.StatusCode, bucket, object)), bucket, object)
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}
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var contentLength int64
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contentLengthStr := resp.Header.Get("Content-Length")
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if contentLengthStr != "" {
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contentLength, err = strconv.ParseInt(contentLengthStr, 0, 64)
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if err != nil {
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return objInfo, gcsToObjectError(errors.Trace(fmt.Errorf("Unexpected error")), bucket, object)
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}
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}
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t, err := time.Parse(time.RFC1123, resp.Header.Get("Last-Modified"))
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if err != nil {
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return objInfo, errors.Trace(err)
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}
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objInfo.ModTime = t
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objInfo.Bucket = bucket
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objInfo.UserDefined = make(map[string]string)
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if resp.Header.Get("Content-Encoding") != "" {
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objInfo.UserDefined["Content-Encoding"] = resp.Header.Get("Content-Encoding")
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}
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objInfo.UserDefined["Content-Type"] = resp.Header.Get("Content-Type")
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objInfo.ETag = resp.Header.Get("Etag")
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objInfo.ModTime = t
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objInfo.Name = object
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objInfo.Size = contentLength
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return
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}
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// AnonListObjects - List objects anonymously
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func (l *gcsGateway) AnonListObjects(bucket string, prefix string, marker string, delimiter string, maxKeys int) (minio.ListObjectsInfo, error) {
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result, err := l.anonClient.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
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if err != nil {
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return minio.ListObjectsInfo{}, minio.ErrorRespToObjectError(errors.Trace(err), bucket)
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}
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return minio.FromMinioClientListBucketResult(bucket, result), nil
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}
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// AnonListObjectsV2 - List objects in V2 mode, anonymously
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func (l *gcsGateway) AnonListObjectsV2(bucket, prefix, continuationToken, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (minio.ListObjectsV2Info, error) {
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// Request V1 List Object to the backend
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result, err := l.anonClient.ListObjects(bucket, prefix, continuationToken, delimiter, maxKeys)
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if err != nil {
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return minio.ListObjectsV2Info{}, minio.ErrorRespToObjectError(errors.Trace(err), bucket)
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}
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// translate V1 Result to V2Info
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return minio.FromMinioClientListBucketResultToV2Info(bucket, result), nil
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}
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// AnonGetBucketInfo - Get bucket metadata anonymously.
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func (l *gcsGateway) AnonGetBucketInfo(bucket string) (bucketInfo minio.BucketInfo, err error) {
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resp, err := http.Head(toGCSPublicURL(bucket, ""))
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if err != nil {
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return bucketInfo, gcsToObjectError(errors.Trace(err))
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return bucketInfo, gcsToObjectError(errors.Trace(minio.AnonErrToObjectErr(resp.StatusCode, bucket)), bucket)
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}
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t, err := time.Parse(time.RFC1123, resp.Header.Get("Last-Modified"))
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if err != nil {
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return bucketInfo, errors.Trace(err)
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}
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// Last-Modified date being returned by GCS
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return minio.BucketInfo{
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Name: bucket,
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Created: t,
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}, nil
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}
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