1 files changed, 49 insertions, 0 deletions
diff --git a/testing/web-platform/tests/xhr/resources/access-control-preflight-denied.py b/testing/web-platform/tests/xhr/resources/access-control-preflight-denied.py
new file mode 100644
index 0000000000..1ec3037f36
--- /dev/null
+++ b/testing/web-platform/tests/xhr/resources/access-control-preflight-denied.py
@@ -0,0 +1,49 @@
+def main(request, response):
+    def fail(message):
+        response.content = b"FAIL: " + message
+        response.status = 400
+
+    def getState(token):
+        server_state = request.server.stash.take(token)
+        if not server_state:
+            return b"Uninitialized"
+        return server_state
+
+    def setState(token, state):
+        request.server.stash.put(token, state)
+
+    def resetState(token):
+        setState(token, b"")
+
+    response.headers.set(b"Cache-Control", b"no-store")
+    response.headers.set(b"Access-Control-Allow-Origin", request.headers.get(b"origin"))
+    response.headers.set(b"Access-Control-Max-Age", 1)
+    token = request.GET.first(b"token", None)
+    state = getState(token)
+    command = request.GET.first(b"command", None)
+
+    if command == b"reset":
+        if request.method == u"GET":
+            resetState(token)
+            response.content = b"Server state reset"
+        else:
+            fail(b"Invalid Method.")
+    elif state == b"Uninitialized":
+        if request.method == u"OPTIONS":
+            response.content = b"This request should not be displayed."
+            setState(token, b"Denied")
+        else:
+            fail(state)
+    elif state == b"Denied":
+        if request.method == u"GET" and command == b"complete":
+            resetState(token)
+            response.content = b"Request successfully blocked."
+        else:
+            setState(token, b"Deny Ignored")
+            fail(b"The request was not denied.")
+    elif state == b"Deny Ignored":
+        resetState(token)
+        fail(state)
+    else:
+        resetState(token)
+        fail(b"Unknown Error.")