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redirect.go
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redirect.go
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package webapp
import (
"net/http"
"github.com/authgear/authgear-server/pkg/lib/config"
"github.com/authgear/authgear-server/pkg/util/httputil"
)
func GetRedirectURI(r *http.Request, trustProxy bool, defaultURI string) string {
redirectURI, err := httputil.GetRedirectURI(r, trustProxy)
if err != nil {
return defaultURI
}
return redirectURI
}
type OAuthClientResolver interface {
ResolveClient(clientID string) *config.OAuthClientConfig
}
func DerivePostLoginRedirectURIFromRequest(r *http.Request, clientResolver OAuthClientResolver, uiConfig *config.UIConfig) string {
// 1. Redirect URL in query param (must be whitelisted)
// 2. Default redirect URL of the client
// 3. Post-login URL
// 4. `/settings`
redirectURIFromQuery := func() string {
clientID := r.URL.Query().Get("client_id")
redirectURI := r.URL.Query().Get("redirect_uri")
if clientID == "" {
return ""
}
client := clientResolver.ResolveClient(clientID)
if client == nil {
return ""
}
allowedURIs := client.RedirectURIs
allowed := false
for _, u := range allowedURIs {
if u == redirectURI {
allowed = true
break
}
}
// 1. Redirect URL in query param (must be whitelisted)
if allowed && redirectURI != "" {
return redirectURI
}
// 2. Default redirect URL of the client
return client.DefaultRedirectURI()
}()
if redirectURIFromQuery != "" {
return redirectURIFromQuery
}
// 3. Post-login URL
if uiConfig != nil && uiConfig.DefaultRedirectURI != "" {
return uiConfig.DefaultRedirectURI
}
// 4. `/settings`
return "/settings"
}
func ResolvePostLogoutRedirectURI(client *config.OAuthClientConfig, givenPostLogoutRedirectURI string, uiConfig *config.UIConfig) string {
if client != nil && givenPostLogoutRedirectURI != "" {
for _, v := range client.PostLogoutRedirectURIs {
if v == givenPostLogoutRedirectURI {
return givenPostLogoutRedirectURI
}
}
}
if uiConfig != nil && uiConfig.DefaultPostLogoutRedirectURI != "" {
return uiConfig.DefaultPostLogoutRedirectURI
}
return "/login"
}
func ResolveClientURI(client *config.OAuthClientConfig, uiConfig *config.UIConfig) string {
if client != nil && client.ClientURI != "" {
return client.ClientURI
}
if uiConfig != nil && uiConfig.DefaultClientURI != "" {
return uiConfig.DefaultClientURI
}
return ""
}