691 lines
20 KiB
Go
691 lines
20 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package container
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import (
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"errors"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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packages_model "code.gitea.io/gitea/models/packages"
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container_model "code.gitea.io/gitea/models/packages/container"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/json"
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"code.gitea.io/gitea/modules/log"
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packages_module "code.gitea.io/gitea/modules/packages"
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container_module "code.gitea.io/gitea/modules/packages/container"
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"code.gitea.io/gitea/modules/packages/container/oci"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/routers/api/packages/helper"
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packages_service "code.gitea.io/gitea/services/packages"
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container_service "code.gitea.io/gitea/services/packages/container"
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)
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// maximum size of a container manifest
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-manifests
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const maxManifestSize = 10 * 1024 * 1024
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var imageNamePattern = regexp.MustCompile(`\A[a-z0-9]+([._-][a-z0-9]+)*(/[a-z0-9]+([._-][a-z0-9]+)*)*\z`)
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type containerHeaders struct {
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Status int
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ContentDigest string
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UploadUUID string
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Range string
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Location string
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ContentType string
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ContentLength int64
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#legacy-docker-support-http-headers
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func setResponseHeaders(resp http.ResponseWriter, h *containerHeaders) {
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if h.Location != "" {
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resp.Header().Set("Location", h.Location)
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}
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if h.Range != "" {
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resp.Header().Set("Range", h.Range)
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}
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if h.ContentType != "" {
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resp.Header().Set("Content-Type", h.ContentType)
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}
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if h.ContentLength != 0 {
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resp.Header().Set("Content-Length", strconv.FormatInt(h.ContentLength, 10))
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}
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if h.UploadUUID != "" {
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resp.Header().Set("Docker-Upload-Uuid", h.UploadUUID)
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}
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if h.ContentDigest != "" {
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resp.Header().Set("Docker-Content-Digest", h.ContentDigest)
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resp.Header().Set("ETag", fmt.Sprintf(`"%s"`, h.ContentDigest))
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}
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resp.Header().Set("Docker-Distribution-Api-Version", "registry/2.0")
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resp.WriteHeader(h.Status)
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}
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func jsonResponse(ctx *context.Context, status int, obj interface{}) {
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Status: status,
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ContentType: "application/json",
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})
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if err := json.NewEncoder(ctx.Resp).Encode(obj); err != nil {
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log.Error("JSON encode: %v", err)
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}
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}
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func apiError(ctx *context.Context, status int, err error) {
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helper.LogAndProcessError(ctx, status, err, func(message string) {
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Status: status,
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})
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#error-codes
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func apiErrorDefined(ctx *context.Context, err *namedError) {
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type ContainerError struct {
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Code string `json:"code"`
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Message string `json:"message"`
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}
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type ContainerErrors struct {
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Errors []ContainerError `json:"errors"`
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}
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jsonResponse(ctx, err.StatusCode, ContainerErrors{
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Errors: []ContainerError{
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{
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Code: err.Code,
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Message: err.Message,
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},
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},
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})
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}
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// ReqContainerAccess is a middleware which checks the current user valid (real user or ghost for anonymous access)
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func ReqContainerAccess(ctx *context.Context) {
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if ctx.Doer == nil {
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ctx.Resp.Header().Add("WWW-Authenticate", `Bearer realm="`+setting.AppURL+`v2/token",service="container_registry",scope="*"`)
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apiErrorDefined(ctx, errUnauthorized)
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}
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}
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// VerifyImageName is a middleware which checks if the image name is allowed
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func VerifyImageName(ctx *context.Context) {
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if !imageNamePattern.MatchString(ctx.Params("image")) {
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apiErrorDefined(ctx, errNameInvalid)
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}
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}
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// DetermineSupport is used to test if the registry supports OCI
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#determining-support
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func DetermineSupport(ctx *context.Context) {
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Status: http.StatusOK,
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})
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}
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// Authenticate creates a token for the current user
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// If the current user is anonymous, the ghost user is used
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func Authenticate(ctx *context.Context) {
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u := ctx.Doer
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if u == nil {
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u = user_model.NewGhostUser()
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}
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token, err := packages_service.CreateAuthorizationToken(u)
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if err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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ctx.JSON(http.StatusOK, map[string]string{
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"token": token,
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})
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}
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// https://docs.docker.com/registry/spec/api/#listing-repositories
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func GetRepositoryList(ctx *context.Context) {
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n := ctx.FormInt("n")
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if n <= 0 || n > 100 {
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n = 100
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}
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last := ctx.FormTrim("last")
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repositories, err := container_model.GetRepositories(ctx, ctx.Doer, n, last)
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if err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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type RepositoryList struct {
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Repositories []string `json:"repositories"`
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}
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if len(repositories) == n {
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v := url.Values{}
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if n > 0 {
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v.Add("n", strconv.Itoa(n))
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}
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v.Add("last", repositories[len(repositories)-1])
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ctx.Resp.Header().Set("Link", fmt.Sprintf(`</v2/_catalog?%s>; rel="next"`, v.Encode()))
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}
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jsonResponse(ctx, http.StatusOK, RepositoryList{
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Repositories: repositories,
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#mounting-a-blob-from-another-repository
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#single-post
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-a-blob-in-chunks
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func InitiateUploadBlob(ctx *context.Context) {
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image := ctx.Params("image")
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mount := ctx.FormTrim("mount")
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from := ctx.FormTrim("from")
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if mount != "" {
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blob, _ := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
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Image: from,
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Digest: mount,
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})
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if blob != nil {
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Location: fmt.Sprintf("/v2/%s/%s/blobs/%s", ctx.Package.Owner.LowerName, image, mount),
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ContentDigest: mount,
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Status: http.StatusCreated,
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})
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return
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}
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}
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digest := ctx.FormTrim("digest")
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if digest != "" {
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buf, err := packages_module.CreateHashedBufferFromReader(ctx.Req.Body, 32*1024*1024)
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if err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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defer buf.Close()
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if digest != digestFromHashSummer(buf) {
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apiErrorDefined(ctx, errDigestInvalid)
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return
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}
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if _, err := saveAsPackageBlob(buf, &packages_service.PackageInfo{Owner: ctx.Package.Owner, Name: image}); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Location: fmt.Sprintf("/v2/%s/%s/blobs/%s", ctx.Package.Owner.LowerName, image, digest),
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ContentDigest: digest,
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Status: http.StatusCreated,
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})
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return
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}
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upload, err := packages_model.CreateBlobUpload(ctx)
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if err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Location: fmt.Sprintf("/v2/%s/%s/blobs/uploads/%s", ctx.Package.Owner.LowerName, image, upload.ID),
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Range: "0-0",
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UploadUUID: upload.ID,
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Status: http.StatusAccepted,
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})
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}
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// https://docs.docker.com/registry/spec/api/#get-blob-upload
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func GetUploadBlob(ctx *context.Context) {
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uuid := ctx.Params("uuid")
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upload, err := packages_model.GetBlobUploadByID(ctx, uuid)
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if err != nil {
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if err == packages_model.ErrPackageBlobUploadNotExist {
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apiErrorDefined(ctx, errBlobUploadUnknown)
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} else {
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apiError(ctx, http.StatusInternalServerError, err)
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}
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Range: fmt.Sprintf("0-%d", upload.BytesReceived),
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UploadUUID: upload.ID,
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Status: http.StatusNoContent,
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-a-blob-in-chunks
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func UploadBlob(ctx *context.Context) {
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image := ctx.Params("image")
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uploader, err := container_service.NewBlobUploader(ctx, ctx.Params("uuid"))
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if err != nil {
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if err == packages_model.ErrPackageBlobUploadNotExist {
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apiErrorDefined(ctx, errBlobUploadUnknown)
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} else {
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apiError(ctx, http.StatusInternalServerError, err)
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}
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return
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}
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defer uploader.Close()
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contentRange := ctx.Req.Header.Get("Content-Range")
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if contentRange != "" {
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start, end := 0, 0
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if _, err := fmt.Sscanf(contentRange, "%d-%d", &start, &end); err != nil {
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apiErrorDefined(ctx, errBlobUploadInvalid)
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return
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}
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if int64(start) != uploader.Size() {
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apiErrorDefined(ctx, errBlobUploadInvalid.WithStatusCode(http.StatusRequestedRangeNotSatisfiable))
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return
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}
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} else if uploader.Size() != 0 {
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apiErrorDefined(ctx, errBlobUploadInvalid.WithMessage("Stream uploads after first write are not allowed"))
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return
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}
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if err := uploader.Append(ctx, ctx.Req.Body); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Location: fmt.Sprintf("/v2/%s/%s/blobs/uploads/%s", ctx.Package.Owner.LowerName, image, uploader.ID),
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Range: fmt.Sprintf("0-%d", uploader.Size()-1),
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UploadUUID: uploader.ID,
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Status: http.StatusAccepted,
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-a-blob-in-chunks
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func EndUploadBlob(ctx *context.Context) {
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image := ctx.Params("image")
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digest := ctx.FormTrim("digest")
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if digest == "" {
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apiErrorDefined(ctx, errDigestInvalid)
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return
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}
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uploader, err := container_service.NewBlobUploader(ctx, ctx.Params("uuid"))
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if err != nil {
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if err == packages_model.ErrPackageBlobUploadNotExist {
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apiErrorDefined(ctx, errBlobUploadUnknown)
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} else {
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apiError(ctx, http.StatusInternalServerError, err)
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}
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return
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}
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close := true
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defer func() {
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if close {
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uploader.Close()
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}
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}()
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if ctx.Req.Body != nil {
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if err := uploader.Append(ctx, ctx.Req.Body); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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}
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if digest != digestFromHashSummer(uploader) {
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apiErrorDefined(ctx, errDigestInvalid)
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return
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}
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if _, err := saveAsPackageBlob(uploader, &packages_service.PackageInfo{Owner: ctx.Package.Owner, Name: image}); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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if err := uploader.Close(); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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close = false
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if err := container_service.RemoveBlobUploadByID(ctx, uploader.ID); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Location: fmt.Sprintf("/v2/%s/%s/blobs/%s", ctx.Package.Owner.LowerName, image, digest),
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ContentDigest: digest,
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Status: http.StatusCreated,
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})
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}
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// https://docs.docker.com/registry/spec/api/#delete-blob-upload
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func CancelUploadBlob(ctx *context.Context) {
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uuid := ctx.Params("uuid")
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_, err := packages_model.GetBlobUploadByID(ctx, uuid)
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if err != nil {
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if err == packages_model.ErrPackageBlobUploadNotExist {
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apiErrorDefined(ctx, errBlobUploadUnknown)
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} else {
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apiError(ctx, http.StatusInternalServerError, err)
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}
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return
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}
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if err := container_service.RemoveBlobUploadByID(ctx, uuid); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Status: http.StatusNoContent,
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})
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}
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func getBlobFromContext(ctx *context.Context) (*packages_model.PackageFileDescriptor, error) {
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digest := ctx.Params("digest")
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if !oci.Digest(digest).Validate() {
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return nil, container_model.ErrContainerBlobNotExist
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}
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return container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
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OwnerID: ctx.Package.Owner.ID,
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Image: ctx.Params("image"),
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Digest: digest,
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#checking-if-content-exists-in-the-registry
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func HeadBlob(ctx *context.Context) {
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blob, err := getBlobFromContext(ctx)
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if err != nil {
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if err == container_model.ErrContainerBlobNotExist {
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apiErrorDefined(ctx, errBlobUnknown)
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} else {
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apiError(ctx, http.StatusInternalServerError, err)
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}
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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ContentDigest: blob.Properties.GetByName(container_module.PropertyDigest),
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ContentLength: blob.Blob.Size,
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Status: http.StatusOK,
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pulling-blobs
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func GetBlob(ctx *context.Context) {
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blob, err := getBlobFromContext(ctx)
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if err != nil {
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if err == container_model.ErrContainerBlobNotExist {
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apiErrorDefined(ctx, errBlobUnknown)
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} else {
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apiError(ctx, http.StatusInternalServerError, err)
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}
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return
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}
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s, _, err := packages_service.GetPackageFileStream(ctx, blob.File)
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if err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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defer s.Close()
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setResponseHeaders(ctx.Resp, &containerHeaders{
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ContentDigest: blob.Properties.GetByName(container_module.PropertyDigest),
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ContentType: blob.Properties.GetByName(container_module.PropertyMediaType),
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ContentLength: blob.Blob.Size,
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Status: http.StatusOK,
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})
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if _, err := io.Copy(ctx.Resp, s); err != nil {
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log.Error("Error whilst copying content to response: %v", err)
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}
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#deleting-blobs
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func DeleteBlob(ctx *context.Context) {
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digest := ctx.Params("digest")
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if !oci.Digest(digest).Validate() {
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apiErrorDefined(ctx, errBlobUnknown)
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return
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}
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if err := deleteBlob(ctx.Package.Owner.ID, ctx.Params("image"), digest); err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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setResponseHeaders(ctx.Resp, &containerHeaders{
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Status: http.StatusAccepted,
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})
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}
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// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pushing-manifests
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func UploadManifest(ctx *context.Context) {
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reference := ctx.Params("reference")
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mci := &manifestCreationInfo{
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MediaType: oci.MediaType(ctx.Req.Header.Get("Content-Type")),
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Owner: ctx.Package.Owner,
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Creator: ctx.Doer,
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Image: ctx.Params("image"),
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Reference: reference,
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IsTagged: !oci.Digest(reference).Validate(),
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}
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if mci.IsTagged && !oci.Reference(reference).Validate() {
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apiErrorDefined(ctx, errManifestInvalid.WithMessage("Tag is invalid"))
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return
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}
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maxSize := maxManifestSize + 1
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buf, err := packages_module.CreateHashedBufferFromReader(&io.LimitedReader{R: ctx.Req.Body, N: int64(maxSize)}, maxSize)
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if err != nil {
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apiError(ctx, http.StatusInternalServerError, err)
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return
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}
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defer buf.Close()
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if buf.Size() > maxManifestSize {
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apiErrorDefined(ctx, errManifestInvalid.WithMessage("Manifest exceeds maximum size").WithStatusCode(http.StatusRequestEntityTooLarge))
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return
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}
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|
|
digest, err := processManifest(mci, buf)
|
|
if err != nil {
|
|
var namedError *namedError
|
|
if errors.As(err, &namedError) {
|
|
apiErrorDefined(ctx, namedError)
|
|
} else if errors.Is(err, container_model.ErrContainerBlobNotExist) {
|
|
apiErrorDefined(ctx, errBlobUnknown)
|
|
} else {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
}
|
|
return
|
|
}
|
|
|
|
setResponseHeaders(ctx.Resp, &containerHeaders{
|
|
Location: fmt.Sprintf("/v2/%s/%s/manifests/%s", ctx.Package.Owner.LowerName, mci.Image, reference),
|
|
ContentDigest: digest,
|
|
Status: http.StatusCreated,
|
|
})
|
|
}
|
|
|
|
func getManifestFromContext(ctx *context.Context) (*packages_model.PackageFileDescriptor, error) {
|
|
reference := ctx.Params("reference")
|
|
|
|
opts := &container_model.BlobSearchOptions{
|
|
OwnerID: ctx.Package.Owner.ID,
|
|
Image: ctx.Params("image"),
|
|
IsManifest: true,
|
|
}
|
|
if oci.Digest(reference).Validate() {
|
|
opts.Digest = reference
|
|
} else if oci.Reference(reference).Validate() {
|
|
opts.Tag = reference
|
|
} else {
|
|
return nil, container_model.ErrContainerBlobNotExist
|
|
}
|
|
|
|
return container_model.GetContainerBlob(ctx, opts)
|
|
}
|
|
|
|
// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#checking-if-content-exists-in-the-registry
|
|
func HeadManifest(ctx *context.Context) {
|
|
manifest, err := getManifestFromContext(ctx)
|
|
if err != nil {
|
|
if err == container_model.ErrContainerBlobNotExist {
|
|
apiErrorDefined(ctx, errManifestUnknown)
|
|
} else {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
}
|
|
return
|
|
}
|
|
|
|
setResponseHeaders(ctx.Resp, &containerHeaders{
|
|
ContentDigest: manifest.Properties.GetByName(container_module.PropertyDigest),
|
|
ContentType: manifest.Properties.GetByName(container_module.PropertyMediaType),
|
|
ContentLength: manifest.Blob.Size,
|
|
Status: http.StatusOK,
|
|
})
|
|
}
|
|
|
|
// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pulling-manifests
|
|
func GetManifest(ctx *context.Context) {
|
|
manifest, err := getManifestFromContext(ctx)
|
|
if err != nil {
|
|
if err == container_model.ErrContainerBlobNotExist {
|
|
apiErrorDefined(ctx, errManifestUnknown)
|
|
} else {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
}
|
|
return
|
|
}
|
|
|
|
s, _, err := packages_service.GetPackageFileStream(ctx, manifest.File)
|
|
if err != nil {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
defer s.Close()
|
|
|
|
setResponseHeaders(ctx.Resp, &containerHeaders{
|
|
ContentDigest: manifest.Properties.GetByName(container_module.PropertyDigest),
|
|
ContentType: manifest.Properties.GetByName(container_module.PropertyMediaType),
|
|
ContentLength: manifest.Blob.Size,
|
|
Status: http.StatusOK,
|
|
})
|
|
if _, err := io.Copy(ctx.Resp, s); err != nil {
|
|
log.Error("Error whilst copying content to response: %v", err)
|
|
}
|
|
}
|
|
|
|
// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#deleting-tags
|
|
// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#deleting-manifests
|
|
func DeleteManifest(ctx *context.Context) {
|
|
reference := ctx.Params("reference")
|
|
|
|
opts := &container_model.BlobSearchOptions{
|
|
OwnerID: ctx.Package.Owner.ID,
|
|
Image: ctx.Params("image"),
|
|
IsManifest: true,
|
|
}
|
|
if oci.Digest(reference).Validate() {
|
|
opts.Digest = reference
|
|
} else if oci.Reference(reference).Validate() {
|
|
opts.Tag = reference
|
|
} else {
|
|
apiErrorDefined(ctx, errManifestUnknown)
|
|
return
|
|
}
|
|
|
|
pvs, err := container_model.GetManifestVersions(ctx, opts)
|
|
if err != nil {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
|
|
if len(pvs) == 0 {
|
|
apiErrorDefined(ctx, errManifestUnknown)
|
|
return
|
|
}
|
|
|
|
for _, pv := range pvs {
|
|
if err := packages_service.RemovePackageVersion(ctx.Doer, pv); err != nil {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
}
|
|
|
|
setResponseHeaders(ctx.Resp, &containerHeaders{
|
|
Status: http.StatusAccepted,
|
|
})
|
|
}
|
|
|
|
// https://github.com/opencontainers/distribution-spec/blob/main/spec.md#content-discovery
|
|
func GetTagList(ctx *context.Context) {
|
|
image := ctx.Params("image")
|
|
|
|
if _, err := packages_model.GetPackageByName(ctx, ctx.Package.Owner.ID, packages_model.TypeContainer, image); err != nil {
|
|
if err == packages_model.ErrPackageNotExist {
|
|
apiErrorDefined(ctx, errNameUnknown)
|
|
} else {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
}
|
|
return
|
|
}
|
|
|
|
n := -1
|
|
if ctx.FormTrim("n") != "" {
|
|
n = ctx.FormInt("n")
|
|
}
|
|
last := ctx.FormTrim("last")
|
|
|
|
tags, err := container_model.GetImageTags(ctx, ctx.Package.Owner.ID, image, n, last)
|
|
if err != nil {
|
|
apiError(ctx, http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
|
|
type TagList struct {
|
|
Name string `json:"name"`
|
|
Tags []string `json:"tags"`
|
|
}
|
|
|
|
if len(tags) > 0 {
|
|
v := url.Values{}
|
|
if n > 0 {
|
|
v.Add("n", strconv.Itoa(n))
|
|
}
|
|
v.Add("last", tags[len(tags)-1])
|
|
|
|
ctx.Resp.Header().Set("Link", fmt.Sprintf(`</v2/%s/%s/tags/list?%s>; rel="next"`, ctx.Package.Owner.LowerName, image, v.Encode()))
|
|
}
|
|
|
|
jsonResponse(ctx, http.StatusOK, TagList{
|
|
Name: strings.ToLower(ctx.Package.Owner.LowerName + "/" + image),
|
|
Tags: tags,
|
|
})
|
|
}
|