/
results.go
534 lines (453 loc) · 13.8 KB
/
results.go
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package objects
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/url"
"strings"
"time"
"github.com/gophercloud/gophercloud"
"github.com/gophercloud/gophercloud/pagination"
)
// Object is a structure that holds information related to a storage object.
type Object struct {
// Bytes is the total number of bytes that comprise the object.
Bytes int64 `json:"bytes"`
// ContentType is the content type of the object.
ContentType string `json:"content_type"`
// Hash represents the MD5 checksum value of the object's content.
Hash string `json:"hash"`
// LastModified is the time the object was last modified.
LastModified time.Time `json:"-"`
// Name is the unique name for the object.
Name string `json:"name"`
// Subdir denotes if the result contains a subdir.
Subdir string `json:"subdir"`
}
func (r *Object) UnmarshalJSON(b []byte) error {
type tmp Object
var s *struct {
tmp
LastModified string `json:"last_modified"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = Object(s.tmp)
if s.LastModified != "" {
t, err := time.Parse(gophercloud.RFC3339MilliNoZ, s.LastModified)
if err != nil {
t, err = time.Parse(gophercloud.RFC3339Milli, s.LastModified)
if err != nil {
return err
}
}
r.LastModified = t
}
return nil
}
// ObjectPage is a single page of objects that is returned from a call to the
// List function.
type ObjectPage struct {
pagination.MarkerPageBase
}
// IsEmpty returns true if a ListResult contains no object names.
func (r ObjectPage) IsEmpty() (bool, error) {
names, err := ExtractNames(r)
return len(names) == 0, err
}
// LastMarker returns the last object name in a ListResult.
func (r ObjectPage) LastMarker() (string, error) {
return extractLastMarker(r)
}
// ExtractInfo is a function that takes a page of objects and returns their
// full information.
func ExtractInfo(r pagination.Page) ([]Object, error) {
var s []Object
err := (r.(ObjectPage)).ExtractInto(&s)
return s, err
}
// ExtractNames is a function that takes a page of objects and returns only
// their names.
func ExtractNames(r pagination.Page) ([]string, error) {
casted := r.(ObjectPage)
ct := casted.Header.Get("Content-Type")
switch {
case strings.HasPrefix(ct, "application/json"):
parsed, err := ExtractInfo(r)
if err != nil {
return nil, err
}
names := make([]string, 0, len(parsed))
for _, object := range parsed {
if object.Subdir != "" {
names = append(names, object.Subdir)
} else {
names = append(names, object.Name)
}
}
return names, nil
case strings.HasPrefix(ct, "text/plain"):
names := make([]string, 0, 50)
body := string(r.(ObjectPage).Body.([]uint8))
for _, name := range strings.Split(body, "\n") {
if len(name) > 0 {
names = append(names, name)
}
}
return names, nil
case strings.HasPrefix(ct, "text/html"):
return []string{}, nil
default:
return nil, fmt.Errorf("Cannot extract names from response with content-type: [%s]", ct)
}
}
// DownloadHeader represents the headers returned in the response from a
// Download request.
type DownloadHeader struct {
AcceptRanges string `json:"Accept-Ranges"`
ContentDisposition string `json:"Content-Disposition"`
ContentEncoding string `json:"Content-Encoding"`
ContentLength int64 `json:"Content-Length,string"`
ContentType string `json:"Content-Type"`
Date time.Time `json:"-"`
DeleteAt time.Time `json:"-"`
ETag string `json:"Etag"`
LastModified time.Time `json:"-"`
ObjectManifest string `json:"X-Object-Manifest"`
StaticLargeObject bool `json:"-"`
TransID string `json:"X-Trans-Id"`
}
func (r *DownloadHeader) UnmarshalJSON(b []byte) error {
type tmp DownloadHeader
var s struct {
tmp
Date gophercloud.JSONRFC1123 `json:"Date"`
DeleteAt gophercloud.JSONUnix `json:"X-Delete-At"`
LastModified gophercloud.JSONRFC1123 `json:"Last-Modified"`
StaticLargeObject interface{} `json:"X-Static-Large-Object"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = DownloadHeader(s.tmp)
switch t := s.StaticLargeObject.(type) {
case string:
if t == "True" || t == "true" {
r.StaticLargeObject = true
}
case bool:
r.StaticLargeObject = t
}
r.Date = time.Time(s.Date)
r.DeleteAt = time.Time(s.DeleteAt)
r.LastModified = time.Time(s.LastModified)
return nil
}
// DownloadResult is a *http.Response that is returned from a call to the
// Download function.
type DownloadResult struct {
gophercloud.HeaderResult
Body io.ReadCloser
}
// Extract will return a struct of headers returned from a call to Download.
func (r DownloadResult) Extract() (*DownloadHeader, error) {
var s DownloadHeader
err := r.ExtractInto(&s)
return &s, err
}
// ExtractContent is a function that takes a DownloadResult's io.Reader body
// and reads all available data into a slice of bytes. Please be aware that due
// the nature of io.Reader is forward-only - meaning that it can only be read
// once and not rewound. You can recreate a reader from the output of this
// function by using bytes.NewReader(downloadBytes)
func (r *DownloadResult) ExtractContent() ([]byte, error) {
if r.Err != nil {
return nil, r.Err
}
defer r.Body.Close()
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return nil, err
}
return body, nil
}
// GetHeader represents the headers returned in the response from a Get request.
type GetHeader struct {
ContentDisposition string `json:"Content-Disposition"`
ContentEncoding string `json:"Content-Encoding"`
ContentLength int64 `json:"Content-Length,string"`
ContentType string `json:"Content-Type"`
Date time.Time `json:"-"`
DeleteAt time.Time `json:"-"`
ETag string `json:"Etag"`
LastModified time.Time `json:"-"`
ObjectManifest string `json:"X-Object-Manifest"`
StaticLargeObject bool `json:"-"`
TransID string `json:"X-Trans-Id"`
}
func (r *GetHeader) UnmarshalJSON(b []byte) error {
type tmp GetHeader
var s struct {
tmp
Date gophercloud.JSONRFC1123 `json:"Date"`
DeleteAt gophercloud.JSONUnix `json:"X-Delete-At"`
LastModified gophercloud.JSONRFC1123 `json:"Last-Modified"`
StaticLargeObject interface{} `json:"X-Static-Large-Object"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = GetHeader(s.tmp)
switch t := s.StaticLargeObject.(type) {
case string:
if t == "True" || t == "true" {
r.StaticLargeObject = true
}
case bool:
r.StaticLargeObject = t
}
r.Date = time.Time(s.Date)
r.DeleteAt = time.Time(s.DeleteAt)
r.LastModified = time.Time(s.LastModified)
return nil
}
// GetResult is a *http.Response that is returned from a call to the Get
// function.
type GetResult struct {
gophercloud.HeaderResult
}
// Extract will return a struct of headers returned from a call to Get.
func (r GetResult) Extract() (*GetHeader, error) {
var s GetHeader
err := r.ExtractInto(&s)
return &s, err
}
// ExtractMetadata is a function that takes a GetResult (of type *http.Response)
// and returns the custom metadata associated with the object.
func (r GetResult) ExtractMetadata() (map[string]string, error) {
if r.Err != nil {
return nil, r.Err
}
metadata := make(map[string]string)
for k, v := range r.Header {
if strings.HasPrefix(k, "X-Object-Meta-") {
key := strings.TrimPrefix(k, "X-Object-Meta-")
metadata[key] = v[0]
}
}
return metadata, nil
}
// CreateHeader represents the headers returned in the response from a
// Create request.
type CreateHeader struct {
ContentLength int64 `json:"Content-Length,string"`
ContentType string `json:"Content-Type"`
Date time.Time `json:"-"`
ETag string `json:"Etag"`
LastModified time.Time `json:"-"`
TransID string `json:"X-Trans-Id"`
}
func (r *CreateHeader) UnmarshalJSON(b []byte) error {
type tmp CreateHeader
var s struct {
tmp
Date gophercloud.JSONRFC1123 `json:"Date"`
LastModified gophercloud.JSONRFC1123 `json:"Last-Modified"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = CreateHeader(s.tmp)
r.Date = time.Time(s.Date)
r.LastModified = time.Time(s.LastModified)
return nil
}
// CreateResult represents the result of a create operation.
type CreateResult struct {
checksum string
gophercloud.HeaderResult
}
// Extract will return a struct of headers returned from a call to Create.
func (r CreateResult) Extract() (*CreateHeader, error) {
//if r.Header.Get("ETag") != fmt.Sprintf("%x", localChecksum) {
// return nil, ErrWrongChecksum{}
//}
var s CreateHeader
err := r.ExtractInto(&s)
return &s, err
}
// UpdateHeader represents the headers returned in the response from a
// Update request.
type UpdateHeader struct {
ContentLength int64 `json:"Content-Length,string"`
ContentType string `json:"Content-Type"`
Date time.Time `json:"-"`
TransID string `json:"X-Trans-Id"`
}
func (r *UpdateHeader) UnmarshalJSON(b []byte) error {
type tmp UpdateHeader
var s struct {
tmp
Date gophercloud.JSONRFC1123 `json:"Date"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = UpdateHeader(s.tmp)
r.Date = time.Time(s.Date)
return nil
}
// UpdateResult represents the result of an update operation.
type UpdateResult struct {
gophercloud.HeaderResult
}
// Extract will return a struct of headers returned from a call to Update.
func (r UpdateResult) Extract() (*UpdateHeader, error) {
var s UpdateHeader
err := r.ExtractInto(&s)
return &s, err
}
// DeleteHeader represents the headers returned in the response from a
// Delete request.
type DeleteHeader struct {
ContentLength int64 `json:"Content-Length,string"`
ContentType string `json:"Content-Type"`
Date time.Time `json:"-"`
TransID string `json:"X-Trans-Id"`
}
func (r *DeleteHeader) UnmarshalJSON(b []byte) error {
type tmp DeleteHeader
var s struct {
tmp
Date gophercloud.JSONRFC1123 `json:"Date"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = DeleteHeader(s.tmp)
r.Date = time.Time(s.Date)
return nil
}
// DeleteResult represents the result of a delete operation.
type DeleteResult struct {
gophercloud.HeaderResult
}
// Extract will return a struct of headers returned from a call to Delete.
func (r DeleteResult) Extract() (*DeleteHeader, error) {
var s DeleteHeader
err := r.ExtractInto(&s)
return &s, err
}
// CopyHeader represents the headers returned in the response from a
// Copy request.
type CopyHeader struct {
ContentLength int64 `json:"Content-Length,string"`
ContentType string `json:"Content-Type"`
CopiedFrom string `json:"X-Copied-From"`
CopiedFromLastModified time.Time `json:"-"`
Date time.Time `json:"-"`
ETag string `json:"Etag"`
LastModified time.Time `json:"-"`
TransID string `json:"X-Trans-Id"`
}
func (r *CopyHeader) UnmarshalJSON(b []byte) error {
type tmp CopyHeader
var s struct {
tmp
CopiedFromLastModified gophercloud.JSONRFC1123 `json:"X-Copied-From-Last-Modified"`
Date gophercloud.JSONRFC1123 `json:"Date"`
LastModified gophercloud.JSONRFC1123 `json:"Last-Modified"`
}
err := json.Unmarshal(b, &s)
if err != nil {
return err
}
*r = CopyHeader(s.tmp)
r.Date = time.Time(s.Date)
r.CopiedFromLastModified = time.Time(s.CopiedFromLastModified)
r.LastModified = time.Time(s.LastModified)
return nil
}
// CopyResult represents the result of a copy operation.
type CopyResult struct {
gophercloud.HeaderResult
}
// Extract will return a struct of headers returned from a call to Copy.
func (r CopyResult) Extract() (*CopyHeader, error) {
var s CopyHeader
err := r.ExtractInto(&s)
return &s, err
}
type BulkDeleteResponse struct {
ResponseStatus string `json:"Response Status"`
ResponseBody string `json:"Response Body"`
Errors [][]string `json:"Errors"`
NumberDeleted int `json:"Number Deleted"`
NumberNotFound int `json:"Number Not Found"`
}
// BulkDeleteResult represents the result of a bulk delete operation. To extract
// the response object from the HTTP response, call its Extract method.
type BulkDeleteResult struct {
gophercloud.Result
}
// Extract will return a BulkDeleteResponse struct returned from a BulkDelete
// call.
func (r BulkDeleteResult) Extract() (*BulkDeleteResponse, error) {
var s BulkDeleteResponse
err := r.ExtractInto(&s)
return &s, err
}
// extractLastMarker is a function that takes a page of objects and returns the
// marker for the page. This can either be a subdir or the last object's name.
func extractLastMarker(r pagination.Page) (string, error) {
casted := r.(ObjectPage)
// If a delimiter was requested, check if a subdir exists.
queryParams, err := url.ParseQuery(casted.URL.RawQuery)
if err != nil {
return "", err
}
var delimeter bool
if v, ok := queryParams["delimiter"]; ok && len(v) > 0 {
delimeter = true
}
ct := casted.Header.Get("Content-Type")
switch {
case strings.HasPrefix(ct, "application/json"):
parsed, err := ExtractInfo(r)
if err != nil {
return "", err
}
var lastObject Object
if len(parsed) > 0 {
lastObject = parsed[len(parsed)-1]
}
if !delimeter {
return lastObject.Name, nil
}
if lastObject.Name != "" {
return lastObject.Name, nil
}
return lastObject.Subdir, nil
case strings.HasPrefix(ct, "text/plain"):
names := make([]string, 0, 50)
body := string(r.(ObjectPage).Body.([]uint8))
for _, name := range strings.Split(body, "\n") {
if len(name) > 0 {
names = append(names, name)
}
}
return names[len(names)-1], err
case strings.HasPrefix(ct, "text/html"):
return "", nil
default:
return "", fmt.Errorf("Cannot extract names from response with content-type: [%s]", ct)
}
}