Internally, triton-go, what manta minio is built on, changed it's internal error handling. This means we no longer need to unwrap specific error types This doesn't change any manta minio functionality - it just changes how errors are handled internally and adds a wrapper for a 404 error
392 lines
10 KiB
Go
392 lines
10 KiB
Go
//
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// Copyright (c) 2018, Joyent, Inc. All rights reserved.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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//
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package storage
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import (
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"context"
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"io"
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"net/http"
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"net/url"
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"path"
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"strconv"
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"strings"
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"time"
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"github.com/joyent/triton-go/client"
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tt "github.com/joyent/triton-go/errors"
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"github.com/pkg/errors"
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)
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type ObjectsClient struct {
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client *client.Client
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}
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// GetObjectInput represents parameters to a GetObject operation.
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type GetInfoInput struct {
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ObjectPath string
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Headers map[string]string
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}
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// GetObjectOutput contains the outputs for a GetObject operation. It is your
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// responsibility to ensure that the io.ReadCloser ObjectReader is closed.
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type GetInfoOutput struct {
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ContentLength uint64
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ContentType string
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LastModified time.Time
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ContentMD5 string
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ETag string
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Metadata map[string]string
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}
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// GetInfo sends a HEAD request to an object in the Manta service. This function
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// does not return a response body.
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func (s *ObjectsClient) GetInfo(ctx context.Context, input *GetInfoInput) (*GetInfoOutput, error) {
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absPath := absFileInput(s.client.AccountName, input.ObjectPath)
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headers := &http.Header{}
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for key, value := range input.Headers {
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headers.Set(key, value)
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}
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reqInput := client.RequestInput{
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Method: http.MethodHead,
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Path: string(absPath),
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Headers: headers,
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}
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_, respHeaders, err := s.client.ExecuteRequestStorage(ctx, reqInput)
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if err != nil {
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return nil, errors.Wrap(err, "unable to get info")
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}
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response := &GetInfoOutput{
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ContentType: respHeaders.Get("Content-Type"),
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ContentMD5: respHeaders.Get("Content-MD5"),
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ETag: respHeaders.Get("Etag"),
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}
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lastModified, err := time.Parse(time.RFC1123, respHeaders.Get("Last-Modified"))
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if err == nil {
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response.LastModified = lastModified
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}
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contentLength, err := strconv.ParseUint(respHeaders.Get("Content-Length"), 10, 64)
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if err == nil {
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response.ContentLength = contentLength
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}
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metadata := map[string]string{}
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for key, values := range respHeaders {
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if strings.HasPrefix(key, "m-") {
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metadata[key] = strings.Join(values, ", ")
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}
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}
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response.Metadata = metadata
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return response, nil
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}
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// IsDir is a convenience wrapper around the GetInfo function which takes an
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// ObjectPath and returns a boolean whether or not the object is a directory
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// type in Manta. Returns an error if GetInfo failed upstream for some reason.
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func (s *ObjectsClient) IsDir(ctx context.Context, objectPath string) (bool, error) {
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info, err := s.GetInfo(ctx, &GetInfoInput{
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ObjectPath: objectPath,
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})
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if err != nil {
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return false, err
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}
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if info != nil {
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return strings.HasSuffix(info.ContentType, "type=directory"), nil
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}
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return false, nil
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}
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// GetObjectInput represents parameters to a GetObject operation.
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type GetObjectInput struct {
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ObjectPath string
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Headers map[string]string
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}
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// GetObjectOutput contains the outputs for a GetObject operation. It is your
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// responsibility to ensure that the io.ReadCloser ObjectReader is closed.
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type GetObjectOutput struct {
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ContentLength uint64
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ContentType string
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LastModified time.Time
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ContentMD5 string
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ETag string
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Metadata map[string]string
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ObjectReader io.ReadCloser
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}
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// Get retrieves an object from the Manta service. If error is nil (i.e. the
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// call returns successfully), it is your responsibility to close the
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// io.ReadCloser named ObjectReader in the operation output.
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func (s *ObjectsClient) Get(ctx context.Context, input *GetObjectInput) (*GetObjectOutput, error) {
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absPath := absFileInput(s.client.AccountName, input.ObjectPath)
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headers := &http.Header{}
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for key, value := range input.Headers {
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headers.Set(key, value)
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}
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reqInput := client.RequestInput{
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Method: http.MethodGet,
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Path: string(absPath),
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Headers: headers,
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}
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respBody, respHeaders, err := s.client.ExecuteRequestStorage(ctx, reqInput)
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if err != nil {
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return nil, errors.Wrap(err, "unable to get object")
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}
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response := &GetObjectOutput{
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ContentType: respHeaders.Get("Content-Type"),
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ContentMD5: respHeaders.Get("Content-MD5"),
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ETag: respHeaders.Get("Etag"),
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ObjectReader: respBody,
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}
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lastModified, err := time.Parse(time.RFC1123, respHeaders.Get("Last-Modified"))
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if err == nil {
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response.LastModified = lastModified
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}
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contentLength, err := strconv.ParseUint(respHeaders.Get("Content-Length"), 10, 64)
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if err == nil {
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response.ContentLength = contentLength
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}
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metadata := map[string]string{}
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for key, values := range respHeaders {
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if strings.HasPrefix(key, "m-") {
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metadata[key] = strings.Join(values, ", ")
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}
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}
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response.Metadata = metadata
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return response, nil
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}
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// DeleteObjectInput represents parameters to a DeleteObject operation.
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type DeleteObjectInput struct {
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ObjectPath string
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Headers map[string]string
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}
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// DeleteObject deletes an object.
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func (s *ObjectsClient) Delete(ctx context.Context, input *DeleteObjectInput) error {
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absPath := absFileInput(s.client.AccountName, input.ObjectPath)
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headers := &http.Header{}
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for key, value := range input.Headers {
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headers.Set(key, value)
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}
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reqInput := client.RequestInput{
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Method: http.MethodDelete,
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Path: string(absPath),
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Headers: headers,
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}
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respBody, _, err := s.client.ExecuteRequestStorage(ctx, reqInput)
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if respBody != nil {
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defer respBody.Close()
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}
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if err != nil {
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return errors.Wrap(err, "unable to delete object")
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}
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return nil
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}
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// PutObjectMetadataInput represents parameters to a PutObjectMetadata operation.
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type PutObjectMetadataInput struct {
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ObjectPath string
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ContentType string
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Metadata map[string]string
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}
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// PutObjectMetadata allows you to overwrite the HTTP headers for an already
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// existing object, without changing the data. Note this is an idempotent "replace"
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// operation, so you must specify the complete set of HTTP headers you want
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// stored on each request.
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//
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// You cannot change "critical" headers:
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// - Content-Length
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// - Content-MD5
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// - Durability-Level
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func (s *ObjectsClient) PutMetadata(ctx context.Context, input *PutObjectMetadataInput) error {
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absPath := absFileInput(s.client.AccountName, input.ObjectPath)
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query := &url.Values{}
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query.Set("metadata", "true")
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headers := &http.Header{}
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headers.Set("Content-Type", input.ContentType)
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for key, value := range input.Metadata {
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headers.Set(key, value)
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}
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reqInput := client.RequestInput{
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Method: http.MethodPut,
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Path: string(absPath),
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Query: query,
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Headers: headers,
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}
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respBody, _, err := s.client.ExecuteRequestStorage(ctx, reqInput)
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if respBody != nil {
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defer respBody.Close()
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}
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if err != nil {
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return errors.Wrap(err, "unable to put metadata")
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}
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return nil
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}
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// PutObjectInput represents parameters to a PutObject operation.
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type PutObjectInput struct {
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ObjectPath string
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DurabilityLevel uint64
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ContentType string
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ContentMD5 string
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IfMatch string
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IfModifiedSince *time.Time
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ContentLength uint64
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MaxContentLength uint64
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ObjectReader io.Reader
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Headers map[string]string
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ForceInsert bool //Force the creation of the directory tree
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}
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func (s *ObjectsClient) Put(ctx context.Context, input *PutObjectInput) error {
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absPath := absFileInput(s.client.AccountName, input.ObjectPath)
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if input.ForceInsert {
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absDirName := _AbsCleanPath(path.Dir(string(absPath)))
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exists, err := checkDirectoryTreeExists(*s, ctx, absDirName)
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if err != nil {
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return err
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}
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if !exists {
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err := createDirectory(*s, ctx, absDirName)
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if err != nil {
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return err
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}
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return putObject(*s, ctx, input, absPath)
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}
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}
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return putObject(*s, ctx, input, absPath)
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}
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// _AbsCleanPath is an internal type that means the input has been
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// path.Clean()'ed and is an absolute path.
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type _AbsCleanPath string
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func absFileInput(accountName, objPath string) _AbsCleanPath {
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cleanInput := path.Clean(objPath)
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if strings.HasPrefix(cleanInput, path.Join("/", accountName, "/")) {
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return _AbsCleanPath(cleanInput)
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}
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cleanAbs := path.Clean(path.Join("/", accountName, objPath))
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return _AbsCleanPath(cleanAbs)
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}
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func putObject(c ObjectsClient, ctx context.Context, input *PutObjectInput, absPath _AbsCleanPath) error {
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if input.MaxContentLength != 0 && input.ContentLength != 0 {
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return errors.New("ContentLength and MaxContentLength may not both be set to non-zero values.")
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}
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headers := &http.Header{}
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for key, value := range input.Headers {
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headers.Set(key, value)
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}
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if input.DurabilityLevel != 0 {
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headers.Set("Durability-Level", strconv.FormatUint(input.DurabilityLevel, 10))
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}
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if input.ContentType != "" {
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headers.Set("Content-Type", input.ContentType)
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}
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if input.ContentMD5 != "" {
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headers.Set("Content-MD$", input.ContentMD5)
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}
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if input.IfMatch != "" {
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headers.Set("If-Match", input.IfMatch)
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}
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if input.IfModifiedSince != nil {
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headers.Set("If-Modified-Since", input.IfModifiedSince.Format(time.RFC1123))
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}
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if input.ContentLength != 0 {
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headers.Set("Content-Length", strconv.FormatUint(input.ContentLength, 10))
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}
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if input.MaxContentLength != 0 {
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headers.Set("Max-Content-Length", strconv.FormatUint(input.MaxContentLength, 10))
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}
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reqInput := client.RequestNoEncodeInput{
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Method: http.MethodPut,
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Path: string(absPath),
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Headers: headers,
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Body: input.ObjectReader,
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}
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respBody, _, err := c.client.ExecuteRequestNoEncode(ctx, reqInput)
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if respBody != nil {
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defer respBody.Close()
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}
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if err != nil {
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return errors.Wrap(err, "unable to put object")
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}
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return nil
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}
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func createDirectory(c ObjectsClient, ctx context.Context, absPath _AbsCleanPath) error {
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dirClient := &DirectoryClient{
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client: c.client,
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}
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// An abspath starts w/ a leading "/" which gets added to the slice as an
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// empty string. Start all array math at 1.
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parts := strings.Split(string(absPath), "/")
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if len(parts) < 2 {
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return errors.New("no path components to create directory")
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}
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folderPath := parts[1]
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// Don't attempt to create a manta account as a directory
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for i := 2; i < len(parts); i++ {
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part := parts[i]
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folderPath = path.Clean(path.Join("/", folderPath, part))
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err := dirClient.Put(ctx, &PutDirectoryInput{
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DirectoryName: folderPath,
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})
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if err != nil {
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return err
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}
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}
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return nil
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}
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func checkDirectoryTreeExists(c ObjectsClient, ctx context.Context, absPath _AbsCleanPath) (bool, error) {
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exists, err := c.IsDir(ctx, string(absPath))
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if err != nil {
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if tt.IsResourceNotFoundError(err) {
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return false, nil
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}
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return false, err
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}
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if exists {
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return true, nil
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}
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return false, nil
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}
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