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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
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@ -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) {