@sap-ux/ui5-proxy-middleware

The @sap-ux/ui5-proxy-middleware is a Custom UI5 Server Middleware for loading the UI5 sources in your application. It can be used either with the ui5 serve or the fiori run commands.

Configuration Options

Option	Default Value	Description
ui5	object	List of mount paths and target urls that should be handled by the proxy. If not provided then /resources and /test-resources are proxied to https://ui5.sap.com
version	undefined	The UI5 version. If this property is not defined, then the minUI5Version from the manifest.json will be used
secure	true	Defines if SSL certs should be verified
debug	false	Enables debug output
proxy	undefined	Use for adding corporate proxy configuration
directLoad	false	Defines whether the UI5 sources should be loaded directly from UI5 CDN

Usage

In order to use the middleware this is the minimal configuration that you need to provide in the ui5.yaml of your application. All requests to /resources and /test-resources will be proxied to the latest UI5 version at https://ui5.sap.com.

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression

Examples

Defining url and path

If you want to explicitly define paths that should be proxied to a specific server, the following configuration is required.

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression
    configuration:
      ui5:
      - path: /resources
        url: https://ui5.sap.com
      - path: /test-resources
        url: https://ui5.sap.com

Alternatively you can use the following syntax if all paths should be proxied to the same url.

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression
    configuration:
      ui5:
        path: 
        - /resources
        - /test-resources
        url: https://ui5.sap.com

NOTE: You can't mix both syntaxes!

Loading a specific UI5 version

To load a specific a UI5 version in your application you can use the version parameter, e.g.

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression
    configuration:
      ui5:
      - path: /resources
        url: https://ui5.sap.com
      - path: /test-resources
        url: https://ui5.sap.com
      version: 1.96.1

Loading UI5 sources directly from UI5 CDN

If you don't load all UI5 source through the ui5-proxy-middleware, then you can set directLoad: true. This will inject the absolute UI5 URL in the bootstrap of your HTML file, thus loading the libraries directly from UI5 CDN.

NOTE: this works only for the default HTML files created by the Fiori generator when a project is generated. Hence index.html, flpSandbox.html and flpSandboxMockServer.html!

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression
    configuration:
      ui5:
      - path: /resources
        url: https://ui5.sap.com
      - path: /test-resources
        url: https://ui5.sap.com
      directLoad: true

Adding corporate proxy configuration

By default the ui5-proxy-middleware will read the proxy configuration from the OS environment variables HTTP_PROXY, HTTPS_PROXY and NO_PROXY or from the Node.js environment variables proxy, https-proxy, and noproxy. If those variables are not set, then you can also provide the proxy configuration in the ui5.yaml file.

server:
  customMiddleware:
  - name: ui5-proxy-middleware
    afterMiddleware: compression
    configuration:
      ui5:
      - path: /resources
        url: https://ui5.sap.com
      - path: /test-resources
        url: https://ui5.sap.com
      proxy: https://my.corporate.proxy.example

Please note: if you want to exclude any domains from the proxy then you will need to set the noproxy variable. E.g. if you want to exclude the https://ui5.sap.com from the proxy you will need to set noproxy to npm config set noproxy ".sap.com". Note the leading ., if you provide only sap.com, then it will not work.

Programmatic Usage

Alternatively you can only use the underlying proxy function, e.g. for the case when you want to incorporate the ui5-proxy-middleware functionality in your own middleware.

import { Router } from 'express';
import { ui5Proxy } from '@sap-ux/ui5-proxy-middleware';

const router = Router();
router.use("/resources/", ui5Proxy({ path: "/", url: "https://ui5.sap.com"})/*, options, filter*/);

• config - The UI5 configuration
• options - Options of the http-proxy-middleware
• filter - a custom function to determine which requests should be proxied or not, example

Keywords

UI5 Proxy Middleware