mirror of
https://github.com/minio/minio.git
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290 lines
8.8 KiB
Go
290 lines
8.8 KiB
Go
/*
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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 cmd
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import (
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"encoding/xml"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"strconv"
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"time"
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"github.com/Azure/azure-sdk-for-go/storage"
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)
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// Make anonymous HTTP request to azure endpoint.
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func azureAnonRequest(verb, urlStr string, header http.Header) (*http.Response, error) {
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req, err := http.NewRequest(verb, urlStr, nil)
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if err != nil {
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return nil, err
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}
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if header != nil {
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req.Header = header
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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 nil, err
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}
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// 4XX and 5XX are error HTTP codes.
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if resp.StatusCode >= 400 && resp.StatusCode <= 511 {
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defer resp.Body.Close()
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respBody, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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if len(respBody) == 0 {
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// no error in response body, might happen in HEAD requests
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return nil, storage.AzureStorageServiceError{
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StatusCode: resp.StatusCode,
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Code: resp.Status,
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Message: "no response body was available for error status code",
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}
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}
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// Response contains Azure storage service error object.
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var storageErr storage.AzureStorageServiceError
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if err := xml.Unmarshal(respBody, &storageErr); err != nil {
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return nil, err
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}
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storageErr.StatusCode = resp.StatusCode
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return nil, storageErr
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}
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return resp, nil
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}
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// AnonGetBucketInfo - Get bucket metadata from azure anonymously.
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func (a *azureObjects) AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, err error) {
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url, err := url.Parse(a.client.GetBlobURL(bucket, ""))
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if err != nil {
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return bucketInfo, azureToObjectError(traceError(err))
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}
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url.RawQuery = "restype=container"
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resp, err := azureAnonRequest(httpHEAD, url.String(), nil)
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if err != nil {
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return bucketInfo, azureToObjectError(traceError(err), bucket)
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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, azureToObjectError(traceError(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, traceError(err)
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}
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bucketInfo = BucketInfo{
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Name: bucket,
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Created: t,
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}
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return bucketInfo, nil
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}
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// AnonPutObject - SendPUT request without authentication.
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// This is needed when clients send PUT requests on objects that can be uploaded without auth.
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func (a *azureObjects) AnonPutObject(bucket, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, err error) {
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// azure doesn't support anonymous put
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return ObjectInfo{}, traceError(NotImplemented{})
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}
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// AnonGetObject - SendGET request without authentication.
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// This is needed when clients send GET requests on objects that can be downloaded without auth.
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func (a *azureObjects) AnonGetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) (err error) {
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h := make(http.Header)
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if length > 0 && startOffset > 0 {
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h.Add("Range", fmt.Sprintf("bytes=%d-%d", startOffset, startOffset+length-1))
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} else if startOffset > 0 {
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h.Add("Range", fmt.Sprintf("bytes=%d-", startOffset))
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}
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resp, err := azureAnonRequest(httpGET, a.client.GetBlobURL(bucket, object), h)
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if err != nil {
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return azureToObjectError(traceError(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 azureToObjectError(traceError(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 traceError(err)
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}
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// AnonGetObjectInfo - Send HEAD request without authentication and convert the
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// result to ObjectInfo.
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func (a *azureObjects) AnonGetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error) {
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resp, err := azureAnonRequest(httpHEAD, a.client.GetBlobURL(bucket, object), nil)
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if err != nil {
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return objInfo, azureToObjectError(traceError(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, azureToObjectError(traceError(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, azureToObjectError(traceError(errUnexpected), 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, traceError(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 - Use Azure equivalent ListBlobs.
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func (a *azureObjects) AnonListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error) {
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params := storage.ListBlobsParameters{
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Prefix: prefix,
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Marker: marker,
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Delimiter: delimiter,
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MaxResults: uint(maxKeys),
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}
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q := azureListBlobsGetParameters(params)
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q.Set("restype", "container")
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q.Set("comp", "list")
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url, err := url.Parse(a.client.GetBlobURL(bucket, ""))
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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url.RawQuery = q.Encode()
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resp, err := azureAnonRequest(httpGET, url.String(), nil)
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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defer resp.Body.Close()
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var listResp storage.BlobListResponse
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data, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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err = xml.Unmarshal(data, &listResp)
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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result.IsTruncated = listResp.NextMarker != ""
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result.NextMarker = listResp.NextMarker
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for _, object := range listResp.Blobs {
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t, e := time.Parse(time.RFC1123, object.Properties.LastModified)
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if e != nil {
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continue
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}
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result.Objects = append(result.Objects, ObjectInfo{
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Bucket: bucket,
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Name: object.Name,
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ModTime: t,
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Size: object.Properties.ContentLength,
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ETag: object.Properties.Etag,
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ContentType: object.Properties.ContentType,
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ContentEncoding: object.Properties.ContentEncoding,
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})
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}
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result.Prefixes = listResp.BlobPrefixes
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return result, nil
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}
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// AnonListObjectsV2 - List objects in V2 mode, anonymously
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func (a *azureObjects) AnonListObjectsV2(bucket, prefix, continuationToken string, fetchOwner bool, delimiter string, maxKeys int) (result ListObjectsV2Info, err error) {
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params := storage.ListBlobsParameters{
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Prefix: prefix,
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Marker: continuationToken,
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Delimiter: delimiter,
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MaxResults: uint(maxKeys),
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}
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q := azureListBlobsGetParameters(params)
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q.Set("restype", "container")
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q.Set("comp", "list")
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url, err := url.Parse(a.client.GetBlobURL(bucket, ""))
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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url.RawQuery = q.Encode()
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resp, err := http.Get(url.String())
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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defer resp.Body.Close()
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var listResp storage.BlobListResponse
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data, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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err = xml.Unmarshal(data, &listResp)
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if err != nil {
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return result, azureToObjectError(traceError(err))
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}
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// If NextMarker is not empty, this means response is truncated and NextContinuationToken should be set
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if listResp.NextMarker != "" {
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result.IsTruncated = true
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result.NextContinuationToken = listResp.NextMarker
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}
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for _, object := range listResp.Blobs {
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t, e := time.Parse(time.RFC1123, object.Properties.LastModified)
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if e != nil {
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continue
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}
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result.Objects = append(result.Objects, ObjectInfo{
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Bucket: bucket,
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Name: object.Name,
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ModTime: t,
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Size: object.Properties.ContentLength,
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ETag: canonicalizeETag(object.Properties.Etag),
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ContentType: object.Properties.ContentType,
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ContentEncoding: object.Properties.ContentEncoding,
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})
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}
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result.Prefixes = listResp.BlobPrefixes
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return result, nil
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}
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