Reading POST payloads

Genie makes it easy to work with POST data. First, we need to register a dedicated route to handle POST requests. Then, when a POST request is received, Genie will automatically extract the payload, making it accessible throughout the Requests.postpayload method – and appending it to the Router.params(:POST) collection.

Handling form-data payloads

The following snippet registers two routes in the root of the app, one for GET and the other for POST requests. The GET route displays a form which submits over POST to the other route. Finally, upon receiving the data, we display a message.


using Genie, Genie.Renderer.Html, Genie.Requests

form = """
<form action="/" method="POST" enctype="multipart/form-data">
  <input type="text" name="name" value="" placeholder="What's your name?" />
  <input type="submit" value="Greet" />

route("/") do

route("/", method = POST) do
  "Hello $(postpayload(:name, "Anon"))"


The postpayload function has a few specializations, and one of them accepts the key and the default value. The default value is returned if the key variable is not defined. You can see the various implementations for postpayload using the API docs or Julia's help> mode.