1 files changed, 49 insertions, 0 deletions
diff --git a/testing/web-platform/tests/xhr/resources/access-control-basic-preflight-cache-invalidation.py b/testing/web-platform/tests/xhr/resources/access-control-basic-preflight-cache-invalidation.py
new file mode 100644
index 0000000000..f4f592dac7
--- /dev/null
+++ b/testing/web-platform/tests/xhr/resources/access-control-basic-preflight-cache-invalidation.py
@@ -0,0 +1,49 @@
+from wptserve.utils import isomorphic_encode
+
+def main(request, response):
+    def fail(message):
+        response.content = b"FAIL " + isomorphic_encode(request.method) + b": " + message
+
+    def getState(token):
+        server_state = request.server.stash.take(token)
+        if not server_state:
+            return b"Uninitialized"
+        return server_state
+
+    def setState(state, token):
+        request.server.stash.put(token, state)
+
+    response.headers.set(b"Access-Control-Allow-Origin", request.headers.get(b"origin"))
+    response.headers.set(b"Access-Control-Allow-Credentials", b"true")
+    token = request.GET.first(b"token", None)
+    state = getState(token)
+
+    if state == b"Uninitialized":
+        if request.method == u"OPTIONS":
+            response.headers.set(b"Access-Control-Allow-Methods", b"PUT")
+            response.headers.set(b"Access-Control-Max-Age", 10)
+            setState(b"OPTIONSSent", token)
+        else:
+            fail(state)
+    elif state == b"OPTIONSSent":
+        if request.method == u"PUT":
+            response.content = b"PASS: First PUT request."
+            setState(b"FirstPUTSent", token)
+        else:
+            fail(state)
+    elif state == b"FirstPUTSent":
+        if request.method == u"OPTIONS":
+            response.headers.set(b"Access-Control-Allow-Methods", b"PUT, XMETHOD")
+            response.headers.set(b"Access-Control-Allow-Headers", b"x-test")
+            setState(b"SecondOPTIONSSent", token)
+        elif request.method == u"PUT":
+            fail(b"Second PUT request sent without preflight")
+        else:
+            fail(state)
+    elif state == b"SecondOPTIONSSent":
+        if request.method == u"PUT" or request.method == u"XMETHOD":
+            response.content = b"PASS: Second OPTIONS request was sent."
+        else:
+            fail(state)
+    else:
+        fail(state)