forked from gitea/gitea
106 lines
3.0 KiB
Go
106 lines
3.0 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package common
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"path"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/charset"
|
|
"code.gitea.io/gitea/modules/context"
|
|
"code.gitea.io/gitea/modules/git"
|
|
"code.gitea.io/gitea/modules/httpcache"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
"code.gitea.io/gitea/modules/typesniffer"
|
|
)
|
|
|
|
// ServeBlob download a git.Blob
|
|
func ServeBlob(ctx *context.Context, blob *git.Blob) error {
|
|
if httpcache.HandleGenericETagCache(ctx.Req, ctx.Resp, `"`+blob.ID.String()+`"`) {
|
|
return nil
|
|
}
|
|
|
|
dataRc, err := blob.DataAsync()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer func() {
|
|
if err = dataRc.Close(); err != nil {
|
|
log.Error("ServeBlob: Close: %v", err)
|
|
}
|
|
}()
|
|
|
|
return ServeData(ctx, ctx.Repo.TreePath, blob.Size(), dataRc)
|
|
}
|
|
|
|
// ServeData download file from io.Reader
|
|
func ServeData(ctx *context.Context, name string, size int64, reader io.Reader) error {
|
|
buf := make([]byte, 1024)
|
|
n, err := reader.Read(buf)
|
|
if err != nil && err != io.EOF {
|
|
return err
|
|
}
|
|
if n >= 0 {
|
|
buf = buf[:n]
|
|
}
|
|
|
|
ctx.Resp.Header().Set("Cache-Control", "public,max-age=86400")
|
|
|
|
if size >= 0 {
|
|
ctx.Resp.Header().Set("Content-Length", fmt.Sprintf("%d", size))
|
|
} else {
|
|
log.Error("ServeData called to serve data: %s with size < 0: %d", name, size)
|
|
}
|
|
name = path.Base(name)
|
|
|
|
// Google Chrome dislike commas in filenames, so let's change it to a space
|
|
name = strings.ReplaceAll(name, ",", " ")
|
|
|
|
st := typesniffer.DetectContentType(buf)
|
|
|
|
mappedMimeType := ""
|
|
if setting.MimeTypeMap.Enabled {
|
|
fileExtension := strings.ToLower(filepath.Ext(name))
|
|
mappedMimeType = setting.MimeTypeMap.Map[fileExtension]
|
|
}
|
|
if st.IsText() || ctx.QueryBool("render") {
|
|
cs, err := charset.DetectEncoding(buf)
|
|
if err != nil {
|
|
log.Error("Detect raw file %s charset failed: %v, using by default utf-8", name, err)
|
|
cs = "utf-8"
|
|
}
|
|
if mappedMimeType == "" {
|
|
mappedMimeType = "text/plain"
|
|
}
|
|
ctx.Resp.Header().Set("Content-Type", mappedMimeType+"; charset="+strings.ToLower(cs))
|
|
} else {
|
|
ctx.Resp.Header().Set("Access-Control-Expose-Headers", "Content-Disposition")
|
|
if mappedMimeType != "" {
|
|
ctx.Resp.Header().Set("Content-Type", mappedMimeType)
|
|
}
|
|
if (st.IsImage() || st.IsPDF()) && (setting.UI.SVG.Enabled || !st.IsSvgImage()) {
|
|
ctx.Resp.Header().Set("Content-Disposition", fmt.Sprintf(`inline; filename="%s"`, name))
|
|
if st.IsSvgImage() {
|
|
ctx.Resp.Header().Set("Content-Security-Policy", "default-src 'none'; style-src 'unsafe-inline'; sandbox")
|
|
ctx.Resp.Header().Set("X-Content-Type-Options", "nosniff")
|
|
ctx.Resp.Header().Set("Content-Type", typesniffer.SvgMimeType)
|
|
}
|
|
} else {
|
|
ctx.Resp.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s"`, name))
|
|
}
|
|
}
|
|
|
|
_, err = ctx.Resp.Write(buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = io.Copy(ctx.Resp, reader)
|
|
return err
|
|
}
|