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Make public URL generation configurable (#34250)

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Follow up #32564

Co-authored-by: Jannis Pohl <838818+jannispl@users.noreply.github.com>
Co-authored-by: Denys Konovalov <kontakt@denyskon.de>
This commit is contained in:
wxiaoguang
2025-04-22 06:49:37 +08:00
committed by GitHub
parent 9a071a596f
commit 9705adb27f
5 changed files with 59 additions and 32 deletions
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23
modules/httplib/url.go
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@ -53,30 +53,31 @@ func getRequestScheme(req *http.Request) string {
return ""
}
// GuessCurrentAppURL tries to guess the current full app URL (with sub-path) by http headers. It always has a '/' suffix, exactly the same as setting.AppURL
// GuessCurrentAppURL tries to guess the current full public URL (with sub-path) by http headers. It always has a '/' suffix, exactly the same as setting.AppURL
// TODO: should rename it to GuessCurrentPublicURL in the future
func GuessCurrentAppURL(ctx context.Context) string {
return GuessCurrentHostURL(ctx) + setting.AppSubURL + "/"
}
// GuessCurrentHostURL tries to guess the current full host URL (no sub-path) by http headers, there is no trailing slash.
func GuessCurrentHostURL(ctx context.Context) string {
req, ok := ctx.Value(RequestContextKey).(*http.Request)
if !ok {
return strings.TrimSuffix(setting.AppURL, setting.AppSubURL+"/")
}
// If no scheme provided by reverse proxy, then do not guess the AppURL, use the configured one.
// Try the best guess to get the current host URL (will be used for public URL) by http headers.
// At the moment, if site admin doesn't configure the proxy headers correctly, then Gitea would guess wrong.
// There are some cases:
// 1. The reverse proxy is configured correctly, it passes "X-Forwarded-Proto/Host" headers. Perfect, Gitea can handle it correctly.
// 2. The reverse proxy is not configured correctly, doesn't pass "X-Forwarded-Proto/Host" headers, eg: only one "proxy_pass http://gitea:3000" in Nginx.
// 3. There is no reverse proxy.
// Without more information, Gitea is impossible to distinguish between case 2 and case 3, then case 2 would result in
// wrong guess like guessed AppURL becomes "http://gitea:3000/" behind a "https" reverse proxy, which is not accessible by end users.
// So we introduced "UseHostHeader" option, it could be enabled by setting "ROOT_URL" to empty
// wrong guess like guessed public URL becomes "http://gitea:3000/" behind a "https" reverse proxy, which is not accessible by end users.
// So we introduced "PUBLIC_URL_DETECTION" option, to control the guessing behavior to satisfy different use cases.
req, ok := ctx.Value(RequestContextKey).(*http.Request)
if !ok {
return strings.TrimSuffix(setting.AppURL, setting.AppSubURL+"/")
}
reqScheme := getRequestScheme(req)
if reqScheme == "" {
// if no reverse proxy header, try to use "Host" header for absolute URL
if setting.UseHostHeader && req.Host != "" {
if setting.PublicURLDetection == setting.PublicURLAuto && req.Host != "" {
return util.Iif(req.TLS == nil, "http://", "https://") + req.Host
}
// fall back to default AppURL
@ -93,8 +94,8 @@ func GuessCurrentHostDomain(ctx context.Context) string {
return util.IfZero(domain, host)
}
// MakeAbsoluteURL tries to make a link to an absolute URL:
// * If link is empty, it returns the current app URL.
// MakeAbsoluteURL tries to make a link to an absolute public URL:
// * If link is empty, it returns the current public URL.
// * If link is absolute, it returns the link.
// * Otherwise, it returns the current host URL + link, the link itself should have correct sub-path (AppSubURL) if needed.
func MakeAbsoluteURL(ctx context.Context, link string) string {