From: Jo-Philipp Wich <jo@mein.io>
Date: Tue, 24 Apr 2018 18:32:47 +0000 (+0200)
Subject: luci-base: add simple CORS handling to luci.dispatcher
X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fluci.git;a=commitdiff_plain;h=8459ec0ec8321a3a4e153f31398e1fe0a9306885

luci-base: add simple CORS handling to luci.dispatcher

Support a new boolean property `cors` which - if set to true - causes the
dispatcher to positively answer CORS OPTIONS requests after authentication
without actually running the dispatching target.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
---

diff --git a/modules/luci-base/luasrc/dispatcher.lua b/modules/luci-base/luasrc/dispatcher.lua
index 5fc2b80e7..1984fc4ad 100644
--- a/modules/luci-base/luasrc/dispatcher.lua
+++ b/modules/luci-base/luasrc/dispatcher.lua
@@ -442,6 +442,13 @@ function dispatch(request)
 		ctx.authuser = sdat.username
 	end
 
+	if track.cors and http.getenv("REQUEST_METHOD") == "OPTIONS" then
+		luci.http.status(200, "OK")
+		luci.http.header("Access-Control-Allow-Origin", http.getenv("HTTP_ORIGIN") or "*")
+		luci.http.header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+		return
+	end
+
 	if c and require_post_security(c.target) then
 		if not test_post_security(c) then
 			return