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Terminate OPTIONS request without sending it to the backend. #9

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Terminate OPTIONS request without sending it to the backend. #9

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9 changes: 8 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -45,4 +45,11 @@ You can also whitelist all domains by setting the second parameter to an asteris

```
http-response lua.cors "GET,PUT,POST" "*"
```
```

To terminate OPTIONS request without sending it to the backend and return an empty response to the client add the following to the same section:

```
acl is_options method OPTIONS
http-request use-service lua.empty-response if is_options
```
13 changes: 12 additions & 1 deletion lib/cors.lua
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Expand Up @@ -75,4 +75,15 @@ end

-- Register the actions with HAProxy
core.register_action("cors", {"http-req"}, cors_request, 0)
core.register_action("cors", {"http-res"}, cors_response, 2)
core.register_action("cors", {"http-res"}, cors_response, 2)

-- Returns an empty response to the client
function empty_response(applet)
applet:add_header("content-length", 0)
applet:set_status(204)
applet:start_response("")
applet:send(response)
end

-- Register the empty-response service with HAProxy
core.register_service("empty-response", "http", empty_response)