98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
/*
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* Copyright 2026 Oleg Borodin <onborodin@gmail.com>
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*
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* This work is published and licensed under a Creative Commons
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* Attribution-NonCommercial-NoDerivatives 4.0 International License.
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*
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* Distribution of this work is permitted, but commercial use and
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* modifications are strictly prohibited.
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*/
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package imageoper
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import (
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"context"
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"fmt"
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"net/http"
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"strconv"
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"mstore/pkg/descr"
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ocidigest "github.com/opencontainers/go-digest"
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)
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type GetManifestParams struct {
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Name string
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Reference string
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}
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type GetManifestResult struct {
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ContentLength string
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ContentType string
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DockerContentDigest string
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Payload string
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}
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func (oper *Operator) GetManifest(ctx context.Context, params *GetManifestParams) (*GetManifestResult, int, error) {
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var err error
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res := &GetManifestResult{}
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if params.Name == "" {
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err = fmt.Errorf("Empty name")
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return res, http.StatusBadRequest, err
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}
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if params.Reference == "" {
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err = fmt.Errorf("Empty reference")
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return res, http.StatusBadRequest, err
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}
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resName := params.Name
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oper.iLock.WaitAndLock(resName)
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defer oper.iLock.Done(resName)
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manDescr := descr.Manifest{}
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var exists bool
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digobj, err := ocidigest.Parse(params.Reference)
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if err == nil {
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exists, manDescr, err = oper.mdb.GetManifestByDigest(ctx, params.Name, digobj.String())
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if err != nil {
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return res, http.StatusInternalServerError, err
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}
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if !exists {
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return res, http.StatusNotFound, err
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}
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res.DockerContentDigest = manDescr.Digest
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size := int64(len(manDescr.Payload))
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res.ContentLength = strconv.FormatInt(size, 10)
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res.ContentType = manDescr.ContentType
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res.Payload = manDescr.Payload
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} else {
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// Create index of manifests. Or not.
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exists, manDescrs, err := oper.mdb.GetManifestsByReference(ctx, params.Name, params.Reference)
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if err != nil {
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return res, http.StatusInternalServerError, err
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}
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if !exists {
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return res, http.StatusNotFound, err
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}
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if len(manDescrs) == 1 {
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res.DockerContentDigest = manDescr.Digest
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size := int64(len(manDescr.Payload))
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res.ContentLength = strconv.FormatInt(size, 10)
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res.ContentType = manDescr.ContentType
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res.Payload = manDescr.Payload
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} else {
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_, indexdata, err := indexFromManigestDescrs(manDescrs)
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if err != nil {
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return res, http.StatusInternalServerError, err
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}
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digobj := ocidigest.SHA256.FromBytes(indexdata)
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res.DockerContentDigest = digobj.String()
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size := int64(len(indexdata))
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res.ContentLength = strconv.FormatInt(size, 10)
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res.ContentType = oiiMediaType
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res.Payload = string(indexdata)
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}
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}
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return res, http.StatusOK, err
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}
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