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//
// Copyright (c) 2018, Joyent, Inc. All rights reserved.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
package storage
import (
"context"
"io"
"net/http"
"net/url"
"path"
"strconv"
"strings"
"time"
"github.com/joyent/triton-go/client"
tt "github.com/joyent/triton-go/errors"
"github.com/pkg/errors"
)
type ObjectsClient struct {
client *client.Client
}
// GetObjectInput represents parameters to a GetObject operation.
type GetInfoInput struct {
ObjectPath string
Headers map[string]string
}
// GetObjectOutput contains the outputs for a GetObject operation. It is your
// responsibility to ensure that the io.ReadCloser ObjectReader is closed.
type GetInfoOutput struct {
ContentLength uint64
ContentType string
LastModified time.Time
ContentMD5 string
ETag string
Metadata map[string]string
}
// GetInfo sends a HEAD request to an object in the Manta service. This function
// does not return a response body.
func (s *ObjectsClient) GetInfo(ctx context.Context, input *GetInfoInput) (*GetInfoOutput, error) {
absPath := absFileInput(s.client.AccountName, input.ObjectPath)
headers := &http.Header{}
for key, value := range input.Headers {
headers.Set(key, value)
}
reqInput := client.RequestInput{
Method: http.MethodHead,
Path: string(absPath),
Headers: headers,
}
_, respHeaders, err := s.client.ExecuteRequestStorage(ctx, reqInput)
if err != nil {
return nil, errors.Wrap(err, "unable to get info")
}
response := &GetInfoOutput{
ContentType: respHeaders.Get("Content-Type"),
ContentMD5: respHeaders.Get("Content-MD5"),
ETag: respHeaders.Get("Etag"),
}
lastModified, err := time.Parse(time.RFC1123, respHeaders.Get("Last-Modified"))
if err == nil {
response.LastModified = lastModified
}
contentLength, err := strconv.ParseUint(respHeaders.Get("Content-Length"), 10, 64)
if err == nil {
response.ContentLength = contentLength
}
metadata := map[string]string{}
for key, values := range respHeaders {
if strings.HasPrefix(key, "m-") {
metadata[key] = strings.Join(values, ", ")
}
}
response.Metadata = metadata
return response, nil
}
// IsDir is a convenience wrapper around the GetInfo function which takes an
// ObjectPath and returns a boolean whether or not the object is a directory
// type in Manta. Returns an error if GetInfo failed upstream for some reason.
func (s *ObjectsClient) IsDir(ctx context.Context, objectPath string) (bool, error) {
info, err := s.GetInfo(ctx, &GetInfoInput{
ObjectPath: objectPath,
})
if err != nil {
return false, err
}
if info != nil {
return strings.HasSuffix(info.ContentType, "type=directory"), nil
}
return false, nil
}
// GetObjectInput represents parameters to a GetObject operation.
type GetObjectInput struct {
ObjectPath string
Headers map[string]string
}
// GetObjectOutput contains the outputs for a GetObject operation. It is your
// responsibility to ensure that the io.ReadCloser ObjectReader is closed.
type GetObjectOutput struct {
ContentLength uint64
ContentType string
LastModified time.Time
ContentMD5 string
ETag string
Metadata map[string]string
ObjectReader io.ReadCloser
}
// Get retrieves an object from the Manta service. If error is nil (i.e. the
// call returns successfully), it is your responsibility to close the
// io.ReadCloser named ObjectReader in the operation output.
func (s *ObjectsClient) Get(ctx context.Context, input *GetObjectInput) (*GetObjectOutput, error) {
absPath := absFileInput(s.client.AccountName, input.ObjectPath)
headers := &http.Header{}
for key, value := range input.Headers {
headers.Set(key, value)
}
reqInput := client.RequestInput{
Method: http.MethodGet,
Path: string(absPath),
Headers: headers,
}
respBody, respHeaders, err := s.client.ExecuteRequestStorage(ctx, reqInput)
if err != nil {
return nil, errors.Wrap(err, "unable to get object")
}
response := &GetObjectOutput{
ContentType: respHeaders.Get("Content-Type"),
ContentMD5: respHeaders.Get("Content-MD5"),
ETag: respHeaders.Get("Etag"),
ObjectReader: respBody,
}
lastModified, err := time.Parse(time.RFC1123, respHeaders.Get("Last-Modified"))
if err == nil {
response.LastModified = lastModified
}
contentLength, err := strconv.ParseUint(respHeaders.Get("Content-Length"), 10, 64)
if err == nil {
response.ContentLength = contentLength
}
metadata := map[string]string{}
for key, values := range respHeaders {
if strings.HasPrefix(key, "m-") {
metadata[key] = strings.Join(values, ", ")
}
}
response.Metadata = metadata
return response, nil
}
// DeleteObjectInput represents parameters to a DeleteObject operation.
type DeleteObjectInput struct {
ObjectPath string
Headers map[string]string
}
// DeleteObject deletes an object.
func (s *ObjectsClient) Delete(ctx context.Context, input *DeleteObjectInput) error {
absPath := absFileInput(s.client.AccountName, input.ObjectPath)
headers := &http.Header{}
for key, value := range input.Headers {
headers.Set(key, value)
}
reqInput := client.RequestInput{
Method: http.MethodDelete,
Path: string(absPath),
Headers: headers,
}
respBody, _, err := s.client.ExecuteRequestStorage(ctx, reqInput)
if respBody != nil {
defer respBody.Close()
}
if err != nil {
return errors.Wrap(err, "unable to delete object")
}
return nil
}
// PutObjectMetadataInput represents parameters to a PutObjectMetadata operation.
type PutObjectMetadataInput struct {
ObjectPath string
ContentType string
Metadata map[string]string
}
// PutObjectMetadata allows you to overwrite the HTTP headers for an already
// existing object, without changing the data. Note this is an idempotent "replace"
// operation, so you must specify the complete set of HTTP headers you want
// stored on each request.
//
// You cannot change "critical" headers:
// - Content-Length
// - Content-MD5
// - Durability-Level
func (s *ObjectsClient) PutMetadata(ctx context.Context, input *PutObjectMetadataInput) error {
absPath := absFileInput(s.client.AccountName, input.ObjectPath)
query := &url.Values{}
query.Set("metadata", "true")
headers := &http.Header{}
headers.Set("Content-Type", input.ContentType)
for key, value := range input.Metadata {
headers.Set(key, value)
}
reqInput := client.RequestInput{
Method: http.MethodPut,
Path: string(absPath),
Query: query,
Headers: headers,
}
respBody, _, err := s.client.ExecuteRequestStorage(ctx, reqInput)
if respBody != nil {
defer respBody.Close()
}
if err != nil {
return errors.Wrap(err, "unable to put metadata")
}
return nil
}
// PutObjectInput represents parameters to a PutObject operation.
type PutObjectInput struct {
ObjectPath string
DurabilityLevel uint64
ContentType string
ContentMD5 string
IfMatch string
IfModifiedSince *time.Time
ContentLength uint64
MaxContentLength uint64
ObjectReader io.Reader
Headers map[string]string
ForceInsert bool //Force the creation of the directory tree
}
func (s *ObjectsClient) Put(ctx context.Context, input *PutObjectInput) error {
absPath := absFileInput(s.client.AccountName, input.ObjectPath)
if input.ForceInsert {
absDirName := _AbsCleanPath(path.Dir(string(absPath)))
exists, err := checkDirectoryTreeExists(*s, ctx, absDirName)
if err != nil {
return err
}
if !exists {
err := createDirectory(*s, ctx, absDirName)
if err != nil {
return err
}
return putObject(*s, ctx, input, absPath)
}
}
return putObject(*s, ctx, input, absPath)
}
// _AbsCleanPath is an internal type that means the input has been
// path.Clean()'ed and is an absolute path.
type _AbsCleanPath string
func absFileInput(accountName, objPath string) _AbsCleanPath {
cleanInput := path.Clean(objPath)
if strings.HasPrefix(cleanInput, path.Join("/", accountName, "/")) {
return _AbsCleanPath(cleanInput)
}
cleanAbs := path.Clean(path.Join("/", accountName, objPath))
return _AbsCleanPath(cleanAbs)
}
func putObject(c ObjectsClient, ctx context.Context, input *PutObjectInput, absPath _AbsCleanPath) error {
if input.MaxContentLength != 0 && input.ContentLength != 0 {
return errors.New("ContentLength and MaxContentLength may not both be set to non-zero values.")
}
headers := &http.Header{}
for key, value := range input.Headers {
headers.Set(key, value)
}
if input.DurabilityLevel != 0 {
headers.Set("Durability-Level", strconv.FormatUint(input.DurabilityLevel, 10))
}
if input.ContentType != "" {
headers.Set("Content-Type", input.ContentType)
}
if input.ContentMD5 != "" {
headers.Set("Content-MD$", input.ContentMD5)
}
if input.IfMatch != "" {
headers.Set("If-Match", input.IfMatch)
}
if input.IfModifiedSince != nil {
headers.Set("If-Modified-Since", input.IfModifiedSince.Format(time.RFC1123))
}
if input.ContentLength != 0 {
headers.Set("Content-Length", strconv.FormatUint(input.ContentLength, 10))
}
if input.MaxContentLength != 0 {
headers.Set("Max-Content-Length", strconv.FormatUint(input.MaxContentLength, 10))
}
reqInput := client.RequestNoEncodeInput{
Method: http.MethodPut,
Path: string(absPath),
Headers: headers,
Body: input.ObjectReader,
}
respBody, _, err := c.client.ExecuteRequestNoEncode(ctx, reqInput)
if respBody != nil {
defer respBody.Close()
}
if err != nil {
return errors.Wrap(err, "unable to put object")
}
return nil
}
func createDirectory(c ObjectsClient, ctx context.Context, absPath _AbsCleanPath) error {
dirClient := &DirectoryClient{
client: c.client,
}
// An abspath starts w/ a leading "/" which gets added to the slice as an
// empty string. Start all array math at 1.
parts := strings.Split(string(absPath), "/")
if len(parts) < 2 {
return errors.New("no path components to create directory")
}
folderPath := parts[1]
// Don't attempt to create a manta account as a directory
for i := 2; i < len(parts); i++ {
part := parts[i]
folderPath = path.Clean(path.Join("/", folderPath, part))
err := dirClient.Put(ctx, &PutDirectoryInput{
DirectoryName: folderPath,
})
if err != nil {
return err
}
}
return nil
}
func checkDirectoryTreeExists(c ObjectsClient, ctx context.Context, absPath _AbsCleanPath) (bool, error) {
exists, err := c.IsDir(ctx, string(absPath))
if err != nil {
if tt.IsResourceNotFoundError(err) {
return false, nil
}
return false, err
}
if exists {
return true, nil
}
return false, nil
}