From dd136858f1ea40ad3c94191d647487fa4f31926c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Fri, 18 Oct 2024 20:33:49 +0200
Subject: Adding upstream version 9.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>
---
 routers/web/repo/download.go | 170 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 routers/web/repo/download.go

(limited to 'routers/web/repo/download.go')

diff --git a/routers/web/repo/download.go b/routers/web/repo/download.go
new file mode 100644
index 0000000..c4a8bae
--- /dev/null
+++ b/routers/web/repo/download.go
@@ -0,0 +1,170 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"path"
+	"time"
+
+	git_model "code.gitea.io/gitea/models/git"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/httpcache"
+	"code.gitea.io/gitea/modules/lfs"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/storage"
+	"code.gitea.io/gitea/routers/common"
+	"code.gitea.io/gitea/services/context"
+)
+
+// ServeBlobOrLFS download a git.Blob redirecting to LFS if necessary
+func ServeBlobOrLFS(ctx *context.Context, blob *git.Blob, lastModified *time.Time) error {
+	if httpcache.HandleGenericETagTimeCache(ctx.Req, ctx.Resp, `"`+blob.ID.String()+`"`, lastModified) {
+		return nil
+	}
+
+	dataRc, err := blob.DataAsync()
+	if err != nil {
+		return err
+	}
+	closed := false
+	defer func() {
+		if closed {
+			return
+		}
+		if err = dataRc.Close(); err != nil {
+			log.Error("ServeBlobOrLFS: Close: %v", err)
+		}
+	}()
+
+	pointer, _ := lfs.ReadPointer(dataRc)
+	if pointer.IsValid() {
+		meta, _ := git_model.GetLFSMetaObjectByOid(ctx, ctx.Repo.Repository.ID, pointer.Oid)
+		if meta == nil {
+			if err = dataRc.Close(); err != nil {
+				log.Error("ServeBlobOrLFS: Close: %v", err)
+			}
+			closed = true
+			return common.ServeBlob(ctx.Base, ctx.Repo.TreePath, blob, lastModified)
+		}
+		if httpcache.HandleGenericETagCache(ctx.Req, ctx.Resp, `"`+pointer.Oid+`"`) {
+			return nil
+		}
+
+		if setting.LFS.Storage.MinioConfig.ServeDirect {
+			// If we have a signed url (S3, object storage), redirect to this directly.
+			u, err := storage.LFS.URL(pointer.RelativePath(), blob.Name())
+			if u != nil && err == nil {
+				ctx.Redirect(u.String())
+				return nil
+			}
+		}
+
+		lfsDataRc, err := lfs.ReadMetaObject(meta.Pointer)
+		if err != nil {
+			return err
+		}
+		defer func() {
+			if err = lfsDataRc.Close(); err != nil {
+				log.Error("ServeBlobOrLFS: Close: %v", err)
+			}
+		}()
+		common.ServeContentByReadSeeker(ctx.Base, ctx.Repo.TreePath, lastModified, lfsDataRc)
+		return nil
+	}
+	if err = dataRc.Close(); err != nil {
+		log.Error("ServeBlobOrLFS: Close: %v", err)
+	}
+	closed = true
+
+	return common.ServeBlob(ctx.Base, ctx.Repo.TreePath, blob, lastModified)
+}
+
+func getBlobForEntry(ctx *context.Context) (blob *git.Blob, lastModified *time.Time) {
+	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
+	if err != nil {
+		if git.IsErrNotExist(err) {
+			ctx.NotFound("GetTreeEntryByPath", err)
+		} else {
+			ctx.ServerError("GetTreeEntryByPath", err)
+		}
+		return nil, nil
+	}
+
+	if entry.IsDir() || entry.IsSubModule() {
+		ctx.NotFound("getBlobForEntry", nil)
+		return nil, nil
+	}
+
+	info, _, err := git.Entries([]*git.TreeEntry{entry}).GetCommitsInfo(ctx, ctx.Repo.Commit, path.Dir("/" + ctx.Repo.TreePath)[1:])
+	if err != nil {
+		ctx.ServerError("GetCommitsInfo", err)
+		return nil, nil
+	}
+
+	if len(info) == 1 {
+		// Not Modified
+		lastModified = &info[0].Commit.Committer.When
+	}
+	blob = entry.Blob()
+
+	return blob, lastModified
+}
+
+// SingleDownload download a file by repos path
+func SingleDownload(ctx *context.Context) {
+	blob, lastModified := getBlobForEntry(ctx)
+	if blob == nil {
+		return
+	}
+
+	if err := common.ServeBlob(ctx.Base, ctx.Repo.TreePath, blob, lastModified); err != nil {
+		ctx.ServerError("ServeBlob", err)
+	}
+}
+
+// SingleDownloadOrLFS download a file by repos path redirecting to LFS if necessary
+func SingleDownloadOrLFS(ctx *context.Context) {
+	blob, lastModified := getBlobForEntry(ctx)
+	if blob == nil {
+		return
+	}
+
+	if err := ServeBlobOrLFS(ctx, blob, lastModified); err != nil {
+		ctx.ServerError("ServeBlobOrLFS", err)
+	}
+}
+
+// DownloadByID download a file by sha1 ID
+func DownloadByID(ctx *context.Context) {
+	blob, err := ctx.Repo.GitRepo.GetBlob(ctx.Params("sha"))
+	if err != nil {
+		if git.IsErrNotExist(err) {
+			ctx.NotFound("GetBlob", nil)
+		} else {
+			ctx.ServerError("GetBlob", err)
+		}
+		return
+	}
+	if err = common.ServeBlob(ctx.Base, ctx.Repo.TreePath, blob, nil); err != nil {
+		ctx.ServerError("ServeBlob", err)
+	}
+}
+
+// DownloadByIDOrLFS download a file by sha1 ID taking account of LFS
+func DownloadByIDOrLFS(ctx *context.Context) {
+	blob, err := ctx.Repo.GitRepo.GetBlob(ctx.Params("sha"))
+	if err != nil {
+		if git.IsErrNotExist(err) {
+			ctx.NotFound("GetBlob", nil)
+		} else {
+			ctx.ServerError("GetBlob", err)
+		}
+		return
+	}
+	if err = ServeBlobOrLFS(ctx, blob, nil); err != nil {
+		ctx.ServerError("ServeBlob", err)
+	}
+}
-- 
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