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package storage
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
import (
"encoding/xml"
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
)
// BlobStorageClient contains operations for Microsoft Azure Blob Storage
// Service.
type BlobStorageClient struct {
client Client
auth authentication
}
// GetServiceProperties gets the properties of your storage account's blob service.
// See: https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/get-blob-service-properties
func (b *BlobStorageClient) GetServiceProperties() (*ServiceProperties, error) {
return b.client.getServiceProperties(blobServiceName, b.auth)
}
// SetServiceProperties sets the properties of your storage account's blob service.
// See: https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/set-blob-service-properties
func (b *BlobStorageClient) SetServiceProperties(props ServiceProperties) error {
return b.client.setServiceProperties(props, blobServiceName, b.auth)
}
// ListContainersParameters defines the set of customizable parameters to make a
// List Containers call.
//
// See https://msdn.microsoft.com/en-us/library/azure/dd179352.aspx
type ListContainersParameters struct {
Prefix string
Marker string
Include string
MaxResults uint
Timeout uint
}
// GetContainerReference returns a Container object for the specified container name.
func (b *BlobStorageClient) GetContainerReference(name string) *Container {
return &Container{
bsc: b,
Name: name,
}
}
// GetContainerReferenceFromSASURI returns a Container object for the specified
// container SASURI
func GetContainerReferenceFromSASURI(sasuri url.URL) (*Container, error) {
path := strings.Split(sasuri.Path, "/")
if len(path) <= 1 {
return nil, fmt.Errorf("could not find a container in URI: %s", sasuri.String())
}
c, err := newSASClientFromURL(&sasuri)
if err != nil {
return nil, err
}
cli := c.GetBlobService()
return &Container{
bsc: &cli,
Name: path[1],
sasuri: sasuri,
}, nil
}
// ListContainers returns the list of containers in a storage account along with
// pagination token and other response details.
//
// See https://msdn.microsoft.com/en-us/library/azure/dd179352.aspx
func (b BlobStorageClient) ListContainers(params ListContainersParameters) (*ContainerListResponse, error) {
q := mergeParams(params.getParameters(), url.Values{"comp": {"list"}})
uri := b.client.getEndpoint(blobServiceName, "", q)
headers := b.client.getStandardHeaders()
type ContainerAlias struct {
bsc *BlobStorageClient
Name string `xml:"Name"`
Properties ContainerProperties `xml:"Properties"`
Metadata BlobMetadata
sasuri url.URL
}
type ContainerListResponseAlias struct {
XMLName xml.Name `xml:"EnumerationResults"`
Xmlns string `xml:"xmlns,attr"`
Prefix string `xml:"Prefix"`
Marker string `xml:"Marker"`
NextMarker string `xml:"NextMarker"`
MaxResults int64 `xml:"MaxResults"`
Containers []ContainerAlias `xml:"Containers>Container"`
}
var outAlias ContainerListResponseAlias
resp, err := b.client.exec(http.MethodGet, uri, headers, nil, b.auth)
if err != nil {
return nil, err
}
defer resp.Body.Close()
err = xmlUnmarshal(resp.Body, &outAlias)
if err != nil {
return nil, err
}
out := ContainerListResponse{
XMLName: outAlias.XMLName,
Xmlns: outAlias.Xmlns,
Prefix: outAlias.Prefix,
Marker: outAlias.Marker,
NextMarker: outAlias.NextMarker,
MaxResults: outAlias.MaxResults,
Containers: make([]Container, len(outAlias.Containers)),
}
for i, cnt := range outAlias.Containers {
out.Containers[i] = Container{
bsc: &b,
Name: cnt.Name,
Properties: cnt.Properties,
Metadata: map[string]string(cnt.Metadata),
sasuri: cnt.sasuri,
}
}
return &out, err
}
func (p ListContainersParameters) getParameters() url.Values {
out := url.Values{}
if p.Prefix != "" {
out.Set("prefix", p.Prefix)
}
if p.Marker != "" {
out.Set("marker", p.Marker)
}
if p.Include != "" {
out.Set("include", p.Include)
}
if p.MaxResults != 0 {
out.Set("maxresults", strconv.FormatUint(uint64(p.MaxResults), 10))
}
if p.Timeout != 0 {
out.Set("timeout", strconv.FormatUint(uint64(p.Timeout), 10))
}
return out
}
func writeMetadata(h http.Header) map[string]string {
metadata := make(map[string]string)
for k, v := range h {
// Can't trust CanonicalHeaderKey() to munge case
// reliably. "_" is allowed in identifiers:
// https://msdn.microsoft.com/en-us/library/azure/dd179414.aspx
// https://msdn.microsoft.com/library/aa664670(VS.71).aspx
// http://tools.ietf.org/html/rfc7230#section-3.2
// ...but "_" is considered invalid by
// CanonicalMIMEHeaderKey in
// https://golang.org/src/net/textproto/reader.go?s=14615:14659#L542
// so k can be "X-Ms-Meta-Lol" or "x-ms-meta-lol_rofl".
k = strings.ToLower(k)
if len(v) == 0 || !strings.HasPrefix(k, strings.ToLower(userDefinedMetadataHeaderPrefix)) {
continue
}
// metadata["lol"] = content of the last X-Ms-Meta-Lol header
k = k[len(userDefinedMetadataHeaderPrefix):]
metadata[k] = v[len(v)-1]
}
return metadata
}
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