Add API to serve blob or LFS file content (#19689)
* Add LFS API * Update routers/api/v1/repo/file.go Co-authored-by: Gusted <williamzijl7@hotmail.com> * Apply suggestions * Apply suggestions * Update routers/api/v1/repo/file.go Co-authored-by: Gusted <williamzijl7@hotmail.com> * Report errors * ADd test * Use own repo for test * Use different repo name * Improve handling * Slight restructures 1. Avoid reading the blob data multiple times 2. Ensure that caching is only checked when about to serve the blob/lfs 3. Avoid nesting by returning early 4. Make log message a bit more clear 5. Ensure that the dataRc is closed by defer when passed to ServeData Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: Gusted <williamzijl7@hotmail.com> Co-authored-by: Andrew Thornton <art27@cantab.net> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
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@ -0,0 +1,56 @@
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// Copyright 2022 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 integrations
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import (
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"net/http"
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"net/url"
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"os"
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"testing"
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api "code.gitea.io/gitea/modules/structs"
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"code.gitea.io/gitea/modules/util"
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"github.com/stretchr/testify/assert"
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)
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func TestAPIGetRawFileOrLFS(t *testing.T) {
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defer prepareTestEnv(t)()
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// Test with raw file
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req := NewRequest(t, "GET", "/api/v1/repos/user2/repo1/media/README.md")
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resp := MakeRequest(t, req, http.StatusOK)
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assert.Equal(t, "# repo1\n\nDescription for repo1", resp.Body.String())
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// Test with LFS
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onGiteaRun(t, func(t *testing.T, u *url.URL) {
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httpContext := NewAPITestContext(t, "user2", "repo-lfs-test")
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doAPICreateRepository(httpContext, false, func(t *testing.T, repository api.Repository) {
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u.Path = httpContext.GitPath()
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dstPath, err := os.MkdirTemp("", httpContext.Reponame)
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assert.NoError(t, err)
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defer util.RemoveAll(dstPath)
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u.Path = httpContext.GitPath()
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u.User = url.UserPassword("user2", userPassword)
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t.Run("Clone", doGitClone(dstPath, u))
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dstPath2, err := os.MkdirTemp("", httpContext.Reponame)
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assert.NoError(t, err)
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defer util.RemoveAll(dstPath2)
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t.Run("Partial Clone", doPartialGitClone(dstPath2, u))
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lfs, _ := lfsCommitAndPushTest(t, dstPath)
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reqLFS := NewRequest(t, "GET", "/api/v1/repos/user2/repo1/media/"+lfs)
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respLFS := MakeRequestNilResponseRecorder(t, reqLFS, http.StatusOK)
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assert.Equal(t, littleSize, respLFS.Length)
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doAPIDeleteRepository(httpContext)
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})
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})
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}
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@ -826,6 +826,7 @@ func Routes() *web.Route {
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Delete(reqAdmin(), repo.DeleteTeam)
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}, reqToken())
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m.Get("/raw/*", context.ReferencesGitRepo(), context.RepoRefForAPI, reqRepoReader(unit.TypeCode), repo.GetRawFile)
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m.Get("/media/*", context.ReferencesGitRepo(), context.RepoRefForAPI, reqRepoReader(unit.TypeCode), repo.GetRawFileOrLFS)
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m.Get("/archive/*", reqRepoReader(unit.TypeCode), repo.GetArchive)
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m.Combo("/forks").Get(repo.ListForks).
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Post(reqToken(), reqRepoReader(unit.TypeCode), bind(api.CreateForkOption{}), repo.CreateFork)
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@ -6,8 +6,10 @@
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package repo
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import (
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"bytes"
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"encoding/base64"
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"fmt"
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"io"
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"net/http"
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"path"
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"time"
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@ -18,7 +20,11 @@ import (
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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/httpcache"
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"code.gitea.io/gitea/modules/lfs"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/storage"
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api "code.gitea.io/gitea/modules/structs"
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"code.gitea.io/gitea/modules/web"
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"code.gitea.io/gitea/routers/common"
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@ -75,6 +81,142 @@ func GetRawFile(ctx *context.APIContext) {
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}
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}
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// GetRawFileOrLFS get a file by repo's path, redirecting to LFS if necessary.
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func GetRawFileOrLFS(ctx *context.APIContext) {
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// swagger:operation GET /repos/{owner}/{repo}/media/{filepath} repository repoGetRawFileOrLFS
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// ---
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// summary: Get a file or it's LFS object from a repository
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// parameters:
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// - name: owner
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// in: path
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// description: owner of the repo
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// type: string
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// required: true
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// - name: repo
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// in: path
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// description: name of the repo
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// type: string
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// required: true
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// - name: filepath
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// in: path
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// description: filepath of the file to get
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// type: string
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// required: true
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// - name: ref
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// in: query
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// description: "The name of the commit/branch/tag. Default the repository’s default branch (usually master)"
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// type: string
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// required: false
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// responses:
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// 200:
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// description: Returns raw file content.
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// "404":
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// "$ref": "#/responses/notFound"
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if ctx.Repo.Repository.IsEmpty {
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ctx.NotFound()
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return
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}
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blob, lastModified := getBlobForEntry(ctx)
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if ctx.Written() {
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return
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}
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// LFS Pointer files are at most 1024 bytes - so any blob greater than 1024 bytes cannot be an LFS file
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if blob.Size() > 1024 {
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// First handle caching for the blob
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if httpcache.HandleGenericETagTimeCache(ctx.Req, ctx.Resp, `"`+blob.ID.String()+`"`, lastModified) {
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return
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}
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// OK not cached - serve!
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if err := common.ServeBlob(ctx.Context, blob, lastModified); err != nil {
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ctx.ServerError("ServeBlob", err)
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}
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return
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}
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// OK, now the blob is known to have at most 1024 bytes we can simply read this in in one go (This saves reading it twice)
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dataRc, err := blob.DataAsync()
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if err != nil {
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ctx.ServerError("DataAsync", err)
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return
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}
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buf, err := io.ReadAll(dataRc)
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if err != nil {
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_ = dataRc.Close()
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ctx.ServerError("DataAsync", err)
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return
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}
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if err := dataRc.Close(); err != nil {
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log.Error("Error whilst closing blob %s reader in %-v. Error: %v", blob.ID, ctx.Context.Repo.Repository, err)
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}
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// Check if the blob represents a pointer
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pointer, _ := lfs.ReadPointer(bytes.NewReader(buf))
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// if its not a pointer just serve the data directly
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if !pointer.IsValid() {
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// First handle caching for the blob
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if httpcache.HandleGenericETagTimeCache(ctx.Req, ctx.Resp, `"`+blob.ID.String()+`"`, lastModified) {
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return
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}
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// OK not cached - serve!
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if err := common.ServeData(ctx.Context, ctx.Repo.TreePath, blob.Size(), bytes.NewReader(buf)); err != nil {
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ctx.ServerError("ServeBlob", err)
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}
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return
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}
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// Now check if there is a meta object for this pointer
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meta, err := models.GetLFSMetaObjectByOid(ctx.Repo.Repository.ID, pointer.Oid)
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// If there isn't one just serve the data directly
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if err == models.ErrLFSObjectNotExist {
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// Handle caching for the blob SHA (not the LFS object OID)
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if httpcache.HandleGenericETagTimeCache(ctx.Req, ctx.Resp, `"`+blob.ID.String()+`"`, lastModified) {
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return
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}
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if err := common.ServeData(ctx.Context, ctx.Repo.TreePath, blob.Size(), bytes.NewReader(buf)); err != nil {
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ctx.ServerError("ServeBlob", err)
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}
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return
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} else if err != nil {
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ctx.ServerError("GetLFSMetaObjectByOid", err)
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return
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}
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// Handle caching for the LFS object OID
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if httpcache.HandleGenericETagCache(ctx.Req, ctx.Resp, `"`+pointer.Oid+`"`) {
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return
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}
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if setting.LFS.ServeDirect {
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// If we have a signed url (S3, object storage), redirect to this directly.
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u, err := storage.LFS.URL(pointer.RelativePath(), blob.Name())
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if u != nil && err == nil {
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ctx.Redirect(u.String())
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return
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}
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}
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lfsDataRc, err := lfs.ReadMetaObject(meta.Pointer)
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if err != nil {
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ctx.ServerError("ReadMetaObject", err)
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return
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}
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defer lfsDataRc.Close()
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if err := common.ServeData(ctx.Context, ctx.Repo.TreePath, meta.Size, lfsDataRc); err != nil {
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ctx.ServerError("ServeData", err)
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}
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}
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func getBlobForEntry(ctx *context.APIContext) (blob *git.Blob, lastModified time.Time) {
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entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
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if err != nil {
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@ -7150,6 +7150,52 @@
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}
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}
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},
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"/repos/{owner}/{repo}/media/{filepath}": {
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"get": {
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"tags": [
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"repository"
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],
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"summary": "Get a file or it's LFS object from a repository",
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"operationId": "repoGetRawFileOrLFS",
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"parameters": [
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{
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"type": "string",
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"description": "owner of the repo",
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"name": "owner",
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"in": "path",
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"required": true
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},
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{
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"type": "string",
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"description": "name of the repo",
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"name": "repo",
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"in": "path",
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"required": true
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},
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{
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"type": "string",
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"description": "filepath of the file to get",
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"name": "filepath",
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"in": "path",
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"required": true
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},
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{
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"type": "string",
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"description": "The name of the commit/branch/tag. Default the repository’s default branch (usually master)",
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"name": "ref",
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"in": "query"
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}
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],
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"responses": {
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"200": {
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"description": "Returns raw file content."
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},
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"404": {
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"$ref": "#/responses/notFound"
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}
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}
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}
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},
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"/repos/{owner}/{repo}/milestones": {
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"get": {
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"produces": [
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