HTTP Endpoints

Every Membrane program has its own URL and can handle requests made to that URL. This provides a simple mechanism for calling into your membrane programs from the outside world.

export const const endpoint: (req: any) => stringendpoint = (req: anyreq) => {
  switch (`${req: anyreq.method} ${req: anyreq.path}`) {
    case "GET /":
      return "hello world";
    default:
      return var JSON: JSONAn intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.JSON.JSON.stringify(value: any, replacer?: (this: any, key: string, value: any) => any, space?: string | number): string (+1 overload)Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
@paramvalue A JavaScript value, usually an object or array, to be converted.@paramreplacer A function that transforms the results.@paramspace Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.stringify({ status: numberstatus: 404 });
  }
};

When your program endpoint receives a request it will be logged, so you can inspect it in the Logs panel.

Accessing an endpoint URL

To access a program’s endpoint URL in your code, call:

await nodes.process.endpointUrl

To open an endpoint, click “Open Preview” above the endpoint function signature. You can also copy a program’s endpoint by right clicking on it in the Navigator panel.

http program

There is also an http program pre-installed in your workspace. When you run fetch in a program, Membrane uses its HTTP program behind the scenes to make network calls. Read on to learn how to add connections to programs, including http.