edge/misc/client-sdk-testsuite/src/server/main.js

// Called on server initialization
function onInit() {
  console.log("server started");

  // Register RPC exposed methods
  rpc.register("echo", echo);
  rpc.register("throwErrorFromClient", throwError);

  rpc.register("add", add);
  rpc.register("reset", reset);
  rpc.register("total", total);
  rpc.register("getUserInfo", getUserInfo);

  rpc.register("listApps");
  rpc.register("getApp");
  rpc.register("getAppUrl");

  rpc.register("serverSideCall", serverSideCall)
}

// Called for each client message
function onClientMessage(ctx, message) {
  console.log("onClientMessage", message);
  
  switch (message.test) {
    case "broadcast":
      net.broadcast(message);
      break;
    default:
      net.send(ctx, message);
  }
}

// Called for each blob upload request
function onBlobUpload(ctx, blobId, blobInfo, metadata) {
  console.log("onBlobUpload", blobId, blobInfo, metadata);

  if (!blobInfo.contentType == "application/json") return { allow: false };
  if (!blobInfo.filename == "blob") return { allow: false };

  return { allow: true, bucket: "test-bucket" };
}

// Called for each blob download request
function onBlobDownload(ctx,  bucket, blobId) {
  console.log("onBlobDownload", bucket, blobId);
  return { allow: true };
}

// RPC methods

function echo(ctx, params) {
  console.log("echoing", params);
  return params;
}

function throwError(ctx, params) {
  throw new Error("oh no !");
}

var count = 0;

function add(ctx, params) {
  console.log("add", params);
  count += params.value;
  return count;
}

function reset(ctx, params) {
  count = 0;
}

function total(ctx, params) {
  return count;
}

function getUserInfo(ctx, params) {  
  var subject = auth.getClaim(ctx, auth.CLAIM_SUBJECT);
  var role = auth.getClaim(ctx, auth.CLAIM_ROLE);
  var preferredUsername = auth.getClaim(ctx, auth.CLAIM_PREFERRED_USERNAME);

  return {
    subject: subject,
    role: role,
    preferredUsername: preferredUsername,
  };
}

function listApps(ctx) {
  return app.list(ctx);
}

function getApp(ctx, params) {
  var appId = params.appId;
  return app.get(ctx, appId);
}

function getAppUrl(ctx, params) {
  var appId = params.appId;
  var from = params.from;

  return app.getUrl(ctx, appId, from ? from : '');
}

function onClientFetch(ctx, url, remoteAddr) {
  return { allow: url === 'http://example.com' };
}

function serverSideCall(ctx, params) {
  console.log("Calling %s.%s(args...)", params.module, params.func)
  return globalThis[params.module][params.func].call(null, ctx, ...params.args);
}