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Fix setting HTTP headers after write (#21833)

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The headers can't be modified after it was send to the client.
This commit is contained in:
KN4CK3R 2022-11-17 18:55:15 +01:00 committed by GitHub
parent c144942b23
commit 43ab9324c5
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 72 additions and 58 deletions
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66
modules/context/context.go
View file

@ -34,6 +34,7 @@ import (
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/templates"
"code.gitea.io/gitea/modules/translation"
"code.gitea.io/gitea/modules/typesniffer"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/web/middleware"
"code.gitea.io/gitea/services/auth"
@ -322,9 +323,9 @@ func (ctx *Context) plainTextInternal(skip, status int, bs []byte) {
if statusPrefix == 4 || statusPrefix == 5 {
log.Log(skip, log.TRACE, "plainTextInternal (status=%d): %s", status, string(bs))
}
ctx.Resp.WriteHeader(status)
ctx.Resp.Header().Set("Content-Type", "text/plain;charset=utf-8")
ctx.Resp.Header().Set("X-Content-Type-Options", "nosniff")
ctx.Resp.WriteHeader(status)
if _, err := ctx.Resp.Write(bs); err != nil {
log.ErrorWithSkip(skip, "plainTextInternal (status=%d): write bytes failed: %v", status, err)
}
@ -345,36 +346,55 @@ func (ctx *Context) RespHeader() http.Header {
return ctx.Resp.Header()
}
type ServeHeaderOptions struct {
ContentType string // defaults to "application/octet-stream"
ContentTypeCharset string
Disposition string // defaults to "attachment"
Filename string
CacheDuration time.Duration // defaults to 5 minutes
}
// SetServeHeaders sets necessary content serve headers
func (ctx *Context) SetServeHeaders(filename string) {
ctx.Resp.Header().Set("Content-Description", "File Transfer")
ctx.Resp.Header().Set("Content-Type", "application/octet-stream")
ctx.Resp.Header().Set("Content-Disposition", "attachment; filename="+filename)
ctx.Resp.Header().Set("Content-Transfer-Encoding", "binary")
ctx.Resp.Header().Set("Expires", "0")
ctx.Resp.Header().Set("Cache-Control", "must-revalidate")
ctx.Resp.Header().Set("Pragma", "public")
ctx.Resp.Header().Set("Access-Control-Expose-Headers", "Content-Disposition")
func (ctx *Context) SetServeHeaders(opts *ServeHeaderOptions) {
header := ctx.Resp.Header()
contentType := typesniffer.ApplicationOctetStream
if opts.ContentType != "" {
if opts.ContentTypeCharset != "" {
contentType = opts.ContentType + "; charset=" + strings.ToLower(opts.ContentTypeCharset)
} else {
contentType = opts.ContentType
}
}
header.Set("Content-Type", contentType)
header.Set("X-Content-Type-Options", "nosniff")
if opts.Filename != "" {
disposition := opts.Disposition
if disposition == "" {
disposition = "attachment"
}
backslashEscapedName := strings.ReplaceAll(strings.ReplaceAll(opts.Filename, `\`, `\\`), `"`, `\"`) // \ -> \\, " -> \"
header.Set("Content-Disposition", fmt.Sprintf(`%s; filename="%s"; filename*=UTF-8''%s`, disposition, backslashEscapedName, url.PathEscape(opts.Filename)))
header.Set("Access-Control-Expose-Headers", "Content-Disposition")
}
duration := opts.CacheDuration
if duration == 0 {
duration = 5 * time.Minute
}
httpcache.AddCacheControlToHeader(header, duration)
}
// ServeContent serves content to http request
func (ctx *Context) ServeContent(name string, r io.ReadSeeker, modTime time.Time) {
ctx.SetServeHeaders(name)
ctx.SetServeHeaders(&ServeHeaderOptions{
Filename: name,
})
http.ServeContent(ctx.Resp, ctx.Req, name, modTime, r)
}
// ServeFile serves given file to response.
func (ctx *Context) ServeFile(file string, names ...string) {
var name string
if len(names) > 0 {
name = names[0]
} else {
name = path.Base(file)
}
ctx.SetServeHeaders(name)
http.ServeFile(ctx.Resp, ctx.Req, file)
}
// UploadStream returns the request body or the first form file
// Only form files need to get closed.
func (ctx *Context) UploadStream() (rd io.ReadCloser, needToClose bool, err error) {

8
routers/api/packages/rubygems/rubygems.go
View file

@ -77,7 +77,9 @@ func enumeratePackages(ctx *context.Context, filename string, pvs []*packages_mo
})
}
ctx.SetServeHeaders(filename + ".gz")
ctx.SetServeHeaders(&context.ServeHeaderOptions{
Filename: filename + ".gz",
})
zw := gzip.NewWriter(ctx.Resp)
defer zw.Close()
@ -115,7 +117,9 @@ func ServePackageSpecification(ctx *context.Context) {
return
}
ctx.SetServeHeaders(filename)
ctx.SetServeHeaders(&context.ServeHeaderOptions{
Filename: filename,
})
zw := zlib.NewWriter(ctx.Resp)
defer zw.Close()

49
routers/common/repo.go
View file

@ -7,7 +7,6 @@ package common
import (
"fmt"
"io"
"net/url"
"path"
"path/filepath"
"strings"
@ -53,50 +52,44 @@ func ServeData(ctx *context.Context, filePath string, size int64, reader io.Read
buf = buf[:n]
}
httpcache.AddCacheControlToHeader(ctx.Resp.Header(), 5*time.Minute)
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", filePath, size)
}
fileName := path.Base(filePath)
sniffedType := typesniffer.DetectContentType(buf)
isPlain := sniffedType.IsText() || ctx.FormBool("render")
mimeType := ""
charset := ""
if setting.MimeTypeMap.Enabled {
fileExtension := strings.ToLower(filepath.Ext(fileName))
mimeType = setting.MimeTypeMap.Map[fileExtension]
opts := &context.ServeHeaderOptions{
Filename: path.Base(filePath),
}
if mimeType == "" {
sniffedType := typesniffer.DetectContentType(buf)
isPlain := sniffedType.IsText() || ctx.FormBool("render")
if setting.MimeTypeMap.Enabled {
fileExtension := strings.ToLower(filepath.Ext(filePath))
opts.ContentType = setting.MimeTypeMap.Map[fileExtension]
}
if opts.ContentType == "" {
if sniffedType.IsBrowsableBinaryType() {
mimeType = sniffedType.GetMimeType()
opts.ContentType = sniffedType.GetMimeType()
} else if isPlain {
mimeType = "text/plain"
opts.ContentType = "text/plain"
} else {
mimeType = typesniffer.ApplicationOctetStream
opts.ContentType = typesniffer.ApplicationOctetStream
}
}
if isPlain {
var charset string
charset, err = charsetModule.DetectEncoding(buf)
if err != nil {
log.Error("Detect raw file %s charset failed: %v, using by default utf-8", filePath, err)
charset = "utf-8"
}
opts.ContentTypeCharset = strings.ToLower(charset)
}
if charset != "" {
ctx.Resp.Header().Set("Content-Type", mimeType+"; charset="+strings.ToLower(charset))
} else {
ctx.Resp.Header().Set("Content-Type", mimeType)
}
ctx.Resp.Header().Set("X-Content-Type-Options", "nosniff")
isSVG := sniffedType.IsSvgImage()
// serve types that can present a security risk with CSP
@ -109,16 +102,12 @@ func ServeData(ctx *context.Context, filePath string, size int64, reader io.Read
ctx.Resp.Header().Set("Content-Security-Policy", "default-src 'none'; style-src 'unsafe-inline'")
}
disposition := "inline"
opts.Disposition = "inline"
if isSVG && !setting.UI.SVG.Enabled {
disposition = "attachment"
opts.Disposition = "attachment"
}
// encode filename per https://datatracker.ietf.org/doc/html/rfc5987
encodedFileName := `filename*=UTF-8''` + url.PathEscape(fileName)
ctx.Resp.Header().Set("Content-Disposition", disposition+"; "+encodedFileName)
ctx.Resp.Header().Set("Access-Control-Expose-Headers", "Content-Disposition")
ctx.SetServeHeaders(opts)
_, err = ctx.Resp.Write(buf)
if err != nil {

2
routers/web/feed/profile.go
View file

@ -5,7 +5,6 @@
package feed
import (
"net/http"
"time"
activities_model "code.gitea.io/gitea/models/activities"
@ -59,7 +58,6 @@ func showUserFeed(ctx *context.Context, formatType string) {
// writeFeed write a feeds.Feed as atom or rss to ctx.Resp
func writeFeed(ctx *context.Context, feed *feeds.Feed, formatType string) {
ctx.Resp.WriteHeader(http.StatusOK)
if formatType == "atom" {
ctx.Resp.Header().Set("Content-Type", "application/atom+xml;charset=utf-8")
if err := feed.WriteAtom(ctx.Resp); err != nil {

5
routers/web/web.go
View file

@ -604,7 +604,10 @@ func RegisterRoutes(m *web.Route) {
m.Group("", func() {
m.Get("/favicon.ico", func(ctx *context.Context) {
ctx.ServeFile(path.Join(setting.StaticRootPath, "public/img/favicon.png"))
ctx.SetServeHeaders(&context.ServeHeaderOptions{
Filename: "favicon.png",
})
http.ServeFile(ctx.Resp, ctx.Req, path.Join(setting.StaticRootPath, "public/img/favicon.png"))
})
m.Group("/{username}", func() {
m.Get(".png", func(ctx *context.Context) { ctx.Error(http.StatusNotFound) })