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requests.go
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package objects
import (
"bytes"
"context"
"crypto/hmac"
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"fmt"
"hash"
"io"
"net/url"
"strings"
"time"
"github.com/gophercloud/gophercloud/v2"
v1 "github.com/gophercloud/gophercloud/v2/openstack/objectstorage/v1"
"github.com/gophercloud/gophercloud/v2/openstack/objectstorage/v1/accounts"
"github.com/gophercloud/gophercloud/v2/openstack/objectstorage/v1/containers"
"github.com/gophercloud/gophercloud/v2/pagination"
)
// ErrTempURLKeyNotFound is an error indicating that the Temp URL key was
// neigther set nor resolved from a container or account metadata.
type ErrTempURLKeyNotFound struct{ gophercloud.ErrMissingInput }
func (e ErrTempURLKeyNotFound) Error() string {
return "Unable to obtain the Temp URL key."
}
// ErrTempURLDigestNotValid is an error indicating that the requested
// cryptographic hash function is not supported.
type ErrTempURLDigestNotValid struct {
gophercloud.ErrMissingInput
Digest string
}
func (e ErrTempURLDigestNotValid) Error() string {
return fmt.Sprintf("The requested %q digest is not supported.", e.Digest)
}
// ListOptsBuilder allows extensions to add additional parameters to the List
// request.
type ListOptsBuilder interface {
ToObjectListParams() (string, error)
}
// ListOpts is a structure that holds parameters for listing objects.
type ListOpts struct {
// Full has been removed from the Gophercloud API. Gophercloud will now
// always request the "full" (json) listing, because simplified listing
// (plaintext) returns false results when names contain end-of-line
// characters.
Limit int `q:"limit"`
Marker string `q:"marker"`
EndMarker string `q:"end_marker"`
Format string `q:"format"`
Prefix string `q:"prefix"`
Delimiter string `q:"delimiter"`
Path string `q:"path"`
Versions bool `q:"versions"`
}
// ToObjectListParams formats a ListOpts into a query string.
func (opts ListOpts) ToObjectListParams() (string, error) {
q, err := gophercloud.BuildQueryString(opts)
return q.String(), err
}
// List is a function that retrieves all objects in a container. It also returns
// the details for the container. To extract only the object information or names,
// pass the ListResult response to the ExtractInfo or ExtractNames function,
// respectively.
func List(c *gophercloud.ServiceClient, containerName string, opts ListOptsBuilder) pagination.Pager {
url, err := listURL(c, containerName)
if err != nil {
return pagination.Pager{Err: err}
}
headers := map[string]string{"Accept": "application/json", "Content-Type": "application/json"}
if opts != nil {
query, err := opts.ToObjectListParams()
if err != nil {
return pagination.Pager{Err: err}
}
url += query
}
pager := pagination.NewPager(c, url, func(r pagination.PageResult) pagination.Page {
p := ObjectPage{pagination.MarkerPageBase{PageResult: r}}
p.MarkerPageBase.Owner = p
return p
})
pager.Headers = headers
return pager
}
// DownloadOptsBuilder allows extensions to add additional parameters to the
// Download request.
type DownloadOptsBuilder interface {
ToObjectDownloadParams() (map[string]string, string, error)
}
// DownloadOpts is a structure that holds parameters for downloading an object.
type DownloadOpts struct {
IfMatch string `h:"If-Match"`
IfModifiedSince time.Time `h:"If-Modified-Since"`
IfNoneMatch string `h:"If-None-Match"`
IfUnmodifiedSince time.Time `h:"If-Unmodified-Since"`
Newest bool `h:"X-Newest"`
Range string `h:"Range"`
Expires string `q:"expires"`
MultipartManifest string `q:"multipart-manifest"`
Signature string `q:"signature"`
ObjectVersionID string `q:"version-id"`
}
// ToObjectDownloadParams formats a DownloadOpts into a query string and map of
// headers.
func (opts DownloadOpts) ToObjectDownloadParams() (map[string]string, string, error) {
q, err := gophercloud.BuildQueryString(opts)
if err != nil {
return nil, "", err
}
h, err := gophercloud.BuildHeaders(opts)
if err != nil {
return nil, q.String(), err
}
if !opts.IfModifiedSince.IsZero() {
h["If-Modified-Since"] = opts.IfModifiedSince.Format(time.RFC1123)
}
if !opts.IfUnmodifiedSince.IsZero() {
h["If-Unmodified-Since"] = opts.IfUnmodifiedSince.Format(time.RFC1123)
}
return h, q.String(), nil
}
// Download is a function that retrieves the content and metadata for an object.
// To extract just the content, call the DownloadResult method ExtractContent,
// after checking DownloadResult's Err field.
func Download(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts DownloadOptsBuilder) (r DownloadResult) {
url, err := downloadURL(c, containerName, objectName)
if err != nil {
r.Err = err
return
}
h := make(map[string]string)
if opts != nil {
headers, query, err := opts.ToObjectDownloadParams()
if err != nil {
r.Err = err
return
}
for k, v := range headers {
h[k] = v
}
url += query
}
resp, err := c.Get(ctx, url, nil, &gophercloud.RequestOpts{
MoreHeaders: h,
OkCodes: []int{200, 206, 304},
KeepResponseBody: true,
})
r.Body, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}
// CreateOptsBuilder allows extensions to add additional parameters to the
// Create request.
type CreateOptsBuilder interface {
ToObjectCreateParams() (io.Reader, map[string]string, string, error)
}
// CreateOpts is a structure that holds parameters for creating an object.
type CreateOpts struct {
Content io.Reader
Metadata map[string]string
NoETag bool
CacheControl string `h:"Cache-Control"`
ContentDisposition string `h:"Content-Disposition"`
ContentEncoding string `h:"Content-Encoding"`
ContentLength int64 `h:"Content-Length"`
ContentType string `h:"Content-Type"`
CopyFrom string `h:"X-Copy-From"`
DeleteAfter int64 `h:"X-Delete-After"`
DeleteAt int64 `h:"X-Delete-At"`
DetectContentType string `h:"X-Detect-Content-Type"`
ETag string `h:"ETag"`
IfNoneMatch string `h:"If-None-Match"`
ObjectManifest string `h:"X-Object-Manifest"`
TransferEncoding string `h:"Transfer-Encoding"`
Expires string `q:"expires"`
MultipartManifest string `q:"multipart-manifest"`
Signature string `q:"signature"`
}
// ToObjectCreateParams formats a CreateOpts into a query string and map of
// headers.
func (opts CreateOpts) ToObjectCreateParams() (io.Reader, map[string]string, string, error) {
q, err := gophercloud.BuildQueryString(opts)
if err != nil {
return nil, nil, "", err
}
h, err := gophercloud.BuildHeaders(opts)
if err != nil {
return nil, nil, "", err
}
for k, v := range opts.Metadata {
h["X-Object-Meta-"+k] = v
}
if opts.NoETag {
delete(h, "etag")
return opts.Content, h, q.String(), nil
}
if h["ETag"] != "" {
return opts.Content, h, q.String(), nil
}
// When we're dealing with big files an io.ReadSeeker allows us to efficiently calculate
// the md5 sum. An io.Reader is only readable once which means we have to copy the entire
// file content into memory first.
readSeeker, isReadSeeker := opts.Content.(io.ReadSeeker)
if !isReadSeeker {
data, err := io.ReadAll(opts.Content)
if err != nil {
return nil, nil, "", err
}
readSeeker = bytes.NewReader(data)
}
hash := md5.New()
// io.Copy into md5 is very efficient as it's done in small chunks.
if _, err := io.Copy(hash, readSeeker); err != nil {
return nil, nil, "", err
}
readSeeker.Seek(0, io.SeekStart)
h["ETag"] = fmt.Sprintf("%x", hash.Sum(nil))
return readSeeker, h, q.String(), nil
}
// Create is a function that creates a new object or replaces an existing
// object.
func Create(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts CreateOptsBuilder) (r CreateResult) {
url, err := createURL(c, containerName, objectName)
if err != nil {
r.Err = err
return
}
h := make(map[string]string)
var b io.Reader
if opts != nil {
tmpB, headers, query, err := opts.ToObjectCreateParams()
if err != nil {
r.Err = err
return
}
for k, v := range headers {
h[k] = v
}
url += query
b = tmpB
}
resp, err := c.Put(ctx, url, b, nil, &gophercloud.RequestOpts{
MoreHeaders: h,
})
_, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}
// CopyOptsBuilder allows extensions to add additional parameters to the
// Copy request.
type CopyOptsBuilder interface {
ToObjectCopyMap() (map[string]string, error)
}
// CopyOptsQueryBuilder allows extensions to add additional query parameters to
// the Copy request.
type CopyOptsQueryBuilder interface {
ToObjectCopyQuery() (string, error)
}
// CopyOpts is a structure that holds parameters for copying one object to
// another.
type CopyOpts struct {
Metadata map[string]string
ContentDisposition string `h:"Content-Disposition"`
ContentEncoding string `h:"Content-Encoding"`
ContentType string `h:"Content-Type"`
// Destination is where the object should be copied to, in the form:
// `/container/object`.
Destination string `h:"Destination" required:"true"`
ObjectVersionID string `q:"version-id"`
}
// ToObjectCopyMap formats a CopyOpts into a map of headers.
func (opts CopyOpts) ToObjectCopyMap() (map[string]string, error) {
h, err := gophercloud.BuildHeaders(opts)
if err != nil {
return nil, err
}
for k, v := range opts.Metadata {
h["X-Object-Meta-"+k] = v
}
return h, nil
}
// ToObjectCopyQuery formats a CopyOpts into a query.
func (opts CopyOpts) ToObjectCopyQuery() (string, error) {
q, err := gophercloud.BuildQueryString(opts)
if err != nil {
return "", err
}
return q.String(), nil
}
// Copy is a function that copies one object to another.
func Copy(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts CopyOptsBuilder) (r CopyResult) {
h := make(map[string]string)
headers, err := opts.ToObjectCopyMap()
if err != nil {
r.Err = err
return
}
for k, v := range headers {
if strings.ToLower(k) == "destination" {
// URL-encode the container name and the object name
// separately before joining them around the `/` slash
// separator. Note that the destination path is also
// expected to start with a slash.
segments := strings.SplitN(v, "/", 3)
if l := len(segments); l != 3 {
r.Err = fmt.Errorf("the destination field is expected to contain at least two slash / characters: the initial one, and the separator between the container name and the object name")
return
}
if segments[0] != "" {
r.Err = fmt.Errorf("the destination field is expected to start with a slash")
return
}
for i := range segments {
segments[i] = url.PathEscape(segments[i])
}
v = strings.Join(segments, "/")
}
h[k] = v
}
url, err := copyURL(c, containerName, objectName)
if err != nil {
r.Err = err
return
}
if opts, ok := opts.(CopyOptsQueryBuilder); ok {
query, err := opts.ToObjectCopyQuery()
if err != nil {
r.Err = err
return
}
url += query
}
resp, err := c.Request(ctx, "COPY", url, &gophercloud.RequestOpts{
MoreHeaders: h,
OkCodes: []int{201},
})
_, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}
// DeleteOptsBuilder allows extensions to add additional parameters to the
// Delete request.
type DeleteOptsBuilder interface {
ToObjectDeleteQuery() (string, error)
}
// DeleteOpts is a structure that holds parameters for deleting an object.
type DeleteOpts struct {
MultipartManifest string `q:"multipart-manifest"`
ObjectVersionID string `q:"version-id"`
}
// ToObjectDeleteQuery formats a DeleteOpts into a query string.
func (opts DeleteOpts) ToObjectDeleteQuery() (string, error) {
q, err := gophercloud.BuildQueryString(opts)
return q.String(), err
}
// Delete is a function that deletes an object.
func Delete(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts DeleteOptsBuilder) (r DeleteResult) {
url, err := deleteURL(c, containerName, objectName)
if err != nil {
r.Err = err
return
}
if opts != nil {
query, err := opts.ToObjectDeleteQuery()
if err != nil {
r.Err = err
return
}
url += query
}
resp, err := c.Delete(ctx, url, nil)
_, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}
// GetOptsBuilder allows extensions to add additional parameters to the
// Get request.
type GetOptsBuilder interface {
ToObjectGetParams() (map[string]string, string, error)
}
// GetOpts is a structure that holds parameters for getting an object's
// metadata.
type GetOpts struct {
Newest bool `h:"X-Newest"`
Expires string `q:"expires"`
Signature string `q:"signature"`
ObjectVersionID string `q:"version-id"`
}
// ToObjectGetParams formats a GetOpts into a query string and a map of headers.
func (opts GetOpts) ToObjectGetParams() (map[string]string, string, error) {
q, err := gophercloud.BuildQueryString(opts)
if err != nil {
return nil, "", err
}
h, err := gophercloud.BuildHeaders(opts)
if err != nil {
return nil, q.String(), err
}
return h, q.String(), nil
}
// Get is a function that retrieves the metadata of an object. To extract just
// the custom metadata, pass the GetResult response to the ExtractMetadata
// function.
func Get(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts GetOptsBuilder) (r GetResult) {
url, err := getURL(c, containerName, objectName)
if err != nil {
r.Err = err
return
}
h := make(map[string]string)
if opts != nil {
headers, query, err := opts.ToObjectGetParams()
if err != nil {
r.Err = err
return
}
for k, v := range headers {
h[k] = v
}
url += query
}
resp, err := c.Head(ctx, url, &gophercloud.RequestOpts{
MoreHeaders: h,
OkCodes: []int{200, 204},
})
_, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}
// UpdateOptsBuilder allows extensions to add additional parameters to the
// Update request.
type UpdateOptsBuilder interface {
ToObjectUpdateMap() (map[string]string, error)
}
// UpdateOpts is a structure that holds parameters for updating, creating, or
// deleting an object's metadata.
type UpdateOpts struct {
Metadata map[string]string
RemoveMetadata []string
ContentDisposition *string `h:"Content-Disposition"`
ContentEncoding *string `h:"Content-Encoding"`
ContentType *string `h:"Content-Type"`
DeleteAfter *int64 `h:"X-Delete-After"`
DeleteAt *int64 `h:"X-Delete-At"`
DetectContentType *bool `h:"X-Detect-Content-Type"`
}
// ToObjectUpdateMap formats a UpdateOpts into a map of headers.
func (opts UpdateOpts) ToObjectUpdateMap() (map[string]string, error) {
h, err := gophercloud.BuildHeaders(opts)
if err != nil {
return nil, err
}
for k, v := range opts.Metadata {
h["X-Object-Meta-"+k] = v
}
for _, k := range opts.RemoveMetadata {
h["X-Remove-Object-Meta-"+k] = "remove"
}
return h, nil
}
// Update is a function that creates, updates, or deletes an object's metadata.
func Update(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts UpdateOptsBuilder) (r UpdateResult) {
url, err := updateURL(c, containerName, objectName)
if err != nil {
r.Err = err
return
}
h := make(map[string]string)
if opts != nil {
headers, err := opts.ToObjectUpdateMap()
if err != nil {
r.Err = err
return
}
for k, v := range headers {
h[k] = v
}
}
resp, err := c.Post(ctx, url, nil, nil, &gophercloud.RequestOpts{
MoreHeaders: h,
})
_, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}
// HTTPMethod represents an HTTP method string (e.g. "GET").
type HTTPMethod string
var (
// GET represents an HTTP "GET" method.
GET HTTPMethod = "GET"
// HEAD represents an HTTP "HEAD" method.
HEAD HTTPMethod = "HEAD"
// PUT represents an HTTP "PUT" method.
PUT HTTPMethod = "PUT"
// POST represents an HTTP "POST" method.
POST HTTPMethod = "POST"
// DELETE represents an HTTP "DELETE" method.
DELETE HTTPMethod = "DELETE"
)
// CreateTempURLOpts are options for creating a temporary URL for an object.
type CreateTempURLOpts struct {
// (REQUIRED) Method is the HTTP method to allow for users of the temp URL.
// Valid values are "GET", "HEAD", "PUT", "POST" and "DELETE".
Method HTTPMethod
// (REQUIRED) TTL is the number of seconds the temp URL should be active.
TTL int
// (Optional) Split is the string on which to split the object URL. Since only
// the object path is used in the hash, the object URL needs to be parsed. If
// empty, the default OpenStack URL split point will be used ("/v1/").
Split string
// (Optional) Timestamp is the current timestamp used to calculate the Temp URL
// signature. If not specified, the current UNIX timestamp is used as the base
// timestamp.
Timestamp time.Time
// (Optional) TempURLKey overrides the Swift container or account Temp URL key.
// TempURLKey must correspond to a target container/account key, otherwise the
// generated link will be invalid. If not specified, the key is obtained from
// a Swift container or account.
TempURLKey string
// (Optional) Digest specifies the cryptographic hash function used to
// calculate the signature. Valid values include sha1, sha256, and
// sha512. If not specified, the default hash function is sha1.
Digest string
}
// CreateTempURL is a function for creating a temporary URL for an object. It
// allows users to have "GET" or "POST" access to a particular tenant's object
// for a limited amount of time.
func CreateTempURL(ctx context.Context, c *gophercloud.ServiceClient, containerName, objectName string, opts CreateTempURLOpts) (string, error) {
url, err := getURL(c, containerName, objectName)
if err != nil {
return "", err
}
urlToBeSigned, err := tempURL(c, containerName, objectName)
if err != nil {
return "", err
}
if opts.Split == "" {
opts.Split = "/v1/"
}
// Initialize time if it was not passed as opts
date := opts.Timestamp
if date.IsZero() {
date = time.Now()
}
duration := time.Duration(opts.TTL) * time.Second
// UNIX time is always UTC
expiry := date.Add(duration).Unix()
// Initialize the tempURLKey to calculate a signature
tempURLKey := opts.TempURLKey
if tempURLKey == "" {
// fallback to a container TempURL key
getHeader, err := containers.Get(ctx, c, containerName, nil).Extract()
if err != nil {
return "", err
}
tempURLKey = getHeader.TempURLKey
if tempURLKey == "" {
// fallback to an account TempURL key
getHeader, err := accounts.Get(ctx, c, nil).Extract()
if err != nil {
return "", err
}
tempURLKey = getHeader.TempURLKey
}
if tempURLKey == "" {
return "", ErrTempURLKeyNotFound{}
}
}
secretKey := []byte(tempURLKey)
_, objectPath, splitFound := strings.Cut(urlToBeSigned, opts.Split)
if !splitFound {
return "", fmt.Errorf("URL prefix %q not found", opts.Split)
}
objectPath = opts.Split + objectPath
body := fmt.Sprintf("%s\n%d\n%s", opts.Method, expiry, objectPath)
var hash hash.Hash
switch opts.Digest {
case "", "sha1":
hash = hmac.New(sha1.New, secretKey)
case "sha256":
hash = hmac.New(sha256.New, secretKey)
case "sha512":
hash = hmac.New(sha512.New, secretKey)
default:
return "", ErrTempURLDigestNotValid{Digest: opts.Digest}
}
hash.Write([]byte(body))
hexsum := fmt.Sprintf("%x", hash.Sum(nil))
return fmt.Sprintf("%s?temp_url_sig=%s&temp_url_expires=%d", url, hexsum, expiry), nil
}
// BulkDelete is a function that bulk deletes objects.
// In Swift, the maximum number of deletes per request is set by default to 10000.
//
// See:
// * https://github.com/openstack/swift/blob/6d3d4197151f44bf28b51257c1a4c5d33411dcae/etc/proxy-server.conf-sample#L1029-L1034
// * https://github.com/openstack/swift/blob/e8cecf7fcc1630ee83b08f9a73e1e59c07f8d372/swift/common/middleware/bulk.py#L309
func BulkDelete(ctx context.Context, c *gophercloud.ServiceClient, container string, objects []string) (r BulkDeleteResult) {
if err := v1.CheckContainerName(container); err != nil {
r.Err = err
return
}
encodedContainer := url.PathEscape(container)
var body bytes.Buffer
for i := range objects {
if err := v1.CheckObjectName(objects[i]); err != nil {
r.Err = err
return
}
body.WriteString(encodedContainer)
body.WriteRune('/')
body.WriteString(url.PathEscape(objects[i]))
body.WriteRune('\n')
}
resp, err := c.Post(ctx, bulkDeleteURL(c), &body, &r.Body, &gophercloud.RequestOpts{
MoreHeaders: map[string]string{
"Accept": "application/json",
"Content-Type": "text/plain",
},
OkCodes: []int{200},
})
_, r.Header, r.Err = gophercloud.ParseResponse(resp, err)
return
}