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package storage
import (
"encoding/xml"
"net/http"
"net/url"
)
// Directory represents a directory on a share.
type Directory struct {
fsc *FileServiceClient
Metadata map[string]string
Name string `xml:"Name"`
parent *Directory
Properties DirectoryProperties
share *Share
}
// DirectoryProperties contains various properties of a directory.
type DirectoryProperties struct {
LastModified string `xml:"Last-Modified"`
Etag string `xml:"Etag"`
}
// ListDirsAndFilesParameters defines the set of customizable parameters to
// make a List Files and Directories call.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166980.aspx
type ListDirsAndFilesParameters struct {
Marker string
MaxResults uint
Timeout uint
}
// DirsAndFilesListResponse contains the response fields from
// a List Files and Directories call.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166980.aspx
type DirsAndFilesListResponse struct {
XMLName xml.Name `xml:"EnumerationResults"`
Xmlns string `xml:"xmlns,attr"`
Marker string `xml:"Marker"`
MaxResults int64 `xml:"MaxResults"`
Directories []Directory `xml:"Entries>Directory"`
Files []File `xml:"Entries>File"`
NextMarker string `xml:"NextMarker"`
}
// builds the complete directory path for this directory object.
func (d *Directory) buildPath() string {
path := ""
current := d
for current.Name != "" {
path = "/" + current.Name + path
current = current.parent
}
return d.share.buildPath() + path
}
// Create this directory in the associated share.
// If a directory with the same name already exists, the operation fails.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166993.aspx
func (d *Directory) Create() error {
// if this is the root directory exit early
if d.parent == nil {
return nil
}
headers, err := d.fsc.createResource(d.buildPath(), resourceDirectory, nil, mergeMDIntoExtraHeaders(d.Metadata, nil), []int{http.StatusCreated})
if err != nil {
return err
}
d.updateEtagAndLastModified(headers)
return nil
}
// CreateIfNotExists creates this directory under the associated share if the
// directory does not exists. Returns true if the directory is newly created or
// false if the directory already exists.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166993.aspx
func (d *Directory) CreateIfNotExists() (bool, error) {
// if this is the root directory exit early
if d.parent == nil {
return false, nil
}
resp, err := d.fsc.createResourceNoClose(d.buildPath(), resourceDirectory, nil, nil)
if resp != nil {
defer readAndCloseBody(resp.body)
if resp.statusCode == http.StatusCreated || resp.statusCode == http.StatusConflict {
if resp.statusCode == http.StatusCreated {
d.updateEtagAndLastModified(resp.headers)
return true, nil
}
return false, d.FetchAttributes()
}
}
return false, err
}
// Delete removes this directory. It must be empty in order to be deleted.
// If the directory does not exist the operation fails.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166969.aspx
func (d *Directory) Delete() error {
return d.fsc.deleteResource(d.buildPath(), resourceDirectory)
}
// DeleteIfExists removes this directory if it exists.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166969.aspx
func (d *Directory) DeleteIfExists() (bool, error) {
resp, err := d.fsc.deleteResourceNoClose(d.buildPath(), resourceDirectory)
if resp != nil {
defer readAndCloseBody(resp.body)
if resp.statusCode == http.StatusAccepted || resp.statusCode == http.StatusNotFound {
return resp.statusCode == http.StatusAccepted, nil
}
}
return false, err
}
// Exists returns true if this directory exists.
func (d *Directory) Exists() (bool, error) {
exists, headers, err := d.fsc.resourceExists(d.buildPath(), resourceDirectory)
if exists {
d.updateEtagAndLastModified(headers)
}
return exists, err
}
// FetchAttributes retrieves metadata for this directory.
func (d *Directory) FetchAttributes() error {
headers, err := d.fsc.getResourceHeaders(d.buildPath(), compNone, resourceDirectory, http.MethodHead)
if err != nil {
return err
}
d.updateEtagAndLastModified(headers)
d.Metadata = getMetadataFromHeaders(headers)
return nil
}
// GetDirectoryReference returns a child Directory object for this directory.
func (d *Directory) GetDirectoryReference(name string) *Directory {
return &Directory{
fsc: d.fsc,
Name: name,
parent: d,
share: d.share,
}
}
// GetFileReference returns a child File object for this directory.
func (d *Directory) GetFileReference(name string) *File {
return &File{
fsc: d.fsc,
Name: name,
parent: d,
share: d.share,
}
}
// ListDirsAndFiles returns a list of files and directories under this directory.
// It also contains a pagination token and other response details.
//
// See https://msdn.microsoft.com/en-us/library/azure/dn166980.aspx
func (d *Directory) ListDirsAndFiles(params ListDirsAndFilesParameters) (*DirsAndFilesListResponse, error) {
q := mergeParams(params.getParameters(), getURLInitValues(compList, resourceDirectory))
resp, err := d.fsc.listContent(d.buildPath(), q, nil)
if err != nil {
return nil, err
}
defer resp.body.Close()
var out DirsAndFilesListResponse
err = xmlUnmarshal(resp.body, &out)
return &out, err
}
// SetMetadata replaces the metadata for this directory.
//
// Some keys may be converted to Camel-Case before sending. All keys
// are returned in lower case by GetDirectoryMetadata. HTTP header names
// are case-insensitive so case munging should not matter to other
// applications either.
//
// See https://msdn.microsoft.com/en-us/library/azure/mt427370.aspx
func (d *Directory) SetMetadata() error {
headers, err := d.fsc.setResourceHeaders(d.buildPath(), compMetadata, resourceDirectory, mergeMDIntoExtraHeaders(d.Metadata, nil))
if err != nil {
return err
}
d.updateEtagAndLastModified(headers)
return nil
}
// updates Etag and last modified date
func (d *Directory) updateEtagAndLastModified(headers http.Header) {
d.Properties.Etag = headers.Get("Etag")
d.Properties.LastModified = headers.Get("Last-Modified")
}
// URL gets the canonical URL to this directory.
// This method does not create a publicly accessible URL if the directory
// is private and this method does not check if the directory exists.
func (d *Directory) URL() string {
return d.fsc.client.getEndpoint(fileServiceName, d.buildPath(), url.Values{})
}
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