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allow customizing response headers passed to client

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A nil slice of headers will use the previous set of default response
headers to maintain existing behavior. The same list of headers is
repeated as the default flag value in `cmd/imageproxy` as documentation
for users to know what values they are overriding (and might want to
still include).

Fixes #387
This commit is contained in:
Will Norris 2025-06-30 18:11:15 -04:00
parent 554bfc5d8e
commit 7f3639886b
2 changed files with 17 additions and 1 deletions
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7
cmd/imageproxy/main.go
View file

@ -39,6 +39,7 @@ var includeReferer = flag.Bool("includeReferer", false, "include referer header
var followRedirects = flag.Bool("followRedirects", true, "follow redirects")
var baseURL = flag.String("baseURL", "", "default base URL for relative remote URLs")
var passRequestHeaders = flag.String("passRequestHeaders", "", "comma separatetd list of request headers to pass to remote server")
var passResponseHeaders = flag.String("passResponseHeaders", "Cache-Control,Last-Modified,Expires,Etag,Link", "comma separated list of response headers to pass from remote server")
var cache tieredCache
var signatureKeys signatureKeyList
var scaleUp = flag.Bool("scaleUp", false, "allow images to scale beyond their original dimensions")
@ -75,6 +76,12 @@ func main() {
if *passRequestHeaders != "" {
p.PassRequestHeaders = strings.Split(*passRequestHeaders, ",")
}
if *passResponseHeaders != "" {
p.PassResponseHeaders = strings.Split(*passResponseHeaders, ",")
} else {
// set to a non-nil empty slice to pass no headers.
p.PassResponseHeaders = []string{}
}
p.SignatureKeys = signatureKeys
if *baseURL != "" {
var err error