ui5-middleware-approuter
A UI5 CLI middleware that puts @sap/approuter in front of the UI5 dev server, proxying it to Cloud Foundry or XS Advanced destinations during development.
Puts @sap/approuter in front of the UI5 dev server, connecting it against a Cloud Foundry or XS Advanced destination. The registry page carries no README, so its configuration is not documented there.
Facts
Where it sits
Who is behind it
In the atlas: maintains 69@ui5-communitymaintainerDimitar FenerskiContributes to this
In the atlas: contributes to 23@dfenerskiFlorian VogtContributes to this
In the atlas: contributes to 50, wrote 2@flovogtPeter MuessigContributes to this
In the atlas: maintains 14, contributes to 80, wrote 1@petermuessigVolker BuzekContributes to this
In the atlas: maintains 7, contributes to 53, wrote 2@vobu4 contributors
What it declares
Every artifact
- Type
- Build tool
- Origin
- By a community org
As a build tool
- Distributed through
- npm
Connections
Serving an app locally and building it for deployment
SAP's Node.js application router in front of business applications
Download
Install
npm add ui5-middleware-approuterDerived from the package name. No recipe recorded; the README has the configuration.
README
quoted from ui5-community/ui5-ecosystem-showcase under Apache-2.0, readUI5 middleware using @sap/approuter for service connectivity
👋 This is an open‑source, community‑driven project, developed and actively monitored by members of the UI5 community. You are welcome to use it, report issues, contribute enhancements, and support others in the community.
Middleware for ui5-server, making destinations configured in SAP Cloud Foundry or SAP XS Advanced available for local development using the http-proxy-middleware.
Prerequisites
- Requires at least
@ui5/cli@3.0.0(to supportspecVersion: "3.0")
⚠️ UI5 CLI Compatibility All releases of this UI5 CLI extension using the major version
3require UI5 CLI V3. Any previous releases below major version3(if available) also support older versions of the UI5 CLI. But the usage of the latest UI5 CLI is strongly recommended!
Install
npm install ui5-middleware-approuter --save-dev
Configuration options (in $yourapp/ui5.yaml)
-
debug:<boolean>, default:false
verbose logging -
port:<int>, default:5000
port to run the underlyingapprouteron -
xsappJson:<string>, default:"./xs-app.json"
path to the cf-style approuter configuration filexs-app.jsonℹ️ the regex for the destination routes must match the pattern :/[^/]*\/(.*\/)?[^/]*/, e.g."^/backend/(.*)$"or"^/index.html" -
destinations:<string[]>, default:[]name: <string>destination name, matching the one used in routes inxs-app.jsonurl: <string>URI to the host to "proxy" to
alternatively the destinations can also be defined in a
.envfile. They need to be in encoded in a single JSON string
e.g.xsapp_dest = [{"name": "destination-name", "url": "<some-service-url>"}]To use these destinations they need to passed to the
destinationsoption as a string"$env:<key-in-env-file>"(e.g.destinations: "$env:xsapp_dest") -
allowServices:<boolean>, default:false
allow BTP services to be used at runtime that are configured inxs-app.json
(requires an authenticated BTP session!) -
authenticationMethod:"none"||"route", default:"none"
whether to equip routes with authentication -
allowLocalDir:<boolean>, default:false
allow static assets to be picked up by the includedapprouter; defaults tofalseas usually all local files/assets are supposedly served byui5-server -
rewriteContent:<boolean>, default:true
enables/disables rewriting of the content by replacing the proxied url in the response body with the server url -
rewriteContentTypes:<string[]>, default:["text/html", "application/json", "application/atom+xml", "application/xml"]
defines the content types which are included for rewriting the content by enabling therewriteContentoption -
extensions:<string[]>, default:[]- a list of extensions to be required and injected into the local approuter instancemodule: <string>- local module path (must start with./):"./my-local-extension.js"or a module from an npm package:"@my-scope/my-package/my-extension.js"parameters: <Map<string, string>>, optional - a map of parameters given as key value pairs which will be injected into the handler function of the extension as the last (4th) argument (function(req, res, next, params), remark: handler functions with more than 3 arguments will not be called for regular extensions only for these extensions!)
-
disableWelcomeFile:<boolean>, default:falseexperimental disables the welcome file handling of the approuter based on thewelcomeFileproperty in thexsappJsonfile -
appendAuthRoute:<boolean>, default:falseexperimental iftruethe middleware adds a custom route for all HTML pages to trigger authentication:{ "source": "^/([^.]+\\.html?(?:\\?.*)?)$", "localDir": relativeSourcePath, "target": "$1", "cacheControl": "no-store", "authenticationType": "xsuaa" } -
enableWebSocket:<boolean>, default:falseexperimental enables support for proxying web sockets, will be also automatically detected fromxs-app.json
Usage
- Define the dependency in
$yourapp/package.json:
"devDependencies": {
// ...
"ui5-middleware-approuter": "*"
// ...
}
- configure it in
$yourapp/ui5.yaml:
server:
customMiddleware:
- name: ui5-middleware-approuter
afterMiddleware: compression
configuration:
authenticationMethod: "none" # "none" || "route", default: "none"
allowServices: true # allows BTP services like SAP IoT to be used
debug: true
port: 1091
xsappJson: "xs-app.json"
destinations:
# check that the destination name (here: "backend") matches your router in xs-app.json
- name: "backend"
url: "https://services.odata.org/V4/(S(fdng4tbvlxgzpdtpfap2rqss))/TripPinServiceRW/"
- put the cf routing config file
xs-app.jsonin the location of$yourappyou specified above (xsappJson) -
recommendation is to put it at the root/of your UI5 app!
How it works
The middleware wraps the @sap/approuter npm module that is used in the SAP BTP CloudFoundry environment for serving UI5 applications, including proxying the configured destinations.
During development, the approuter is started on a configurable port, running alongside the regular local ui5-server. When a call to a URL destination is detected at $webserver/destination, it is proxied to $approuter:$port via request.
Using approuter extensions
The ui5-middleware-approuter allows using approuter extensions. It is possible to pass parameters to handler functions of the extensions as a 4th argument of the handler function.
The configuration of the extensions in the ui5.yaml looks like that:
- name: ui5-middleware-approuter
afterMiddleware: compression
configuration:
extensions:
- module: ./approuter-local-ext.js
parameters:
userId: mustermann@ui5.com
And in the approuter-local-ext.js you can consume the parameters like that:
module.exports = {
insertMiddleware: {
beforeRequestHandler: [
{
path: '/',
handler: function forwardUserInfo(req, res, next, params) {
res.setHeader('x-user-id', params?.userId || "unknown@ui5.com")
next()
}
}
]
}
}
Keep in mind that the 4th parameter doesn't work for the regular approuter extensions and the handler function will not be called when having more than 3 arguments.
Misc/FAQ
q: does authentication on destinations
a: yes, works 🥳
- prerequisite: a
default-env.jsonfile at the root/of your UI5 app Bespokendefault-env.jsonfile can be obtained via theDefault Env CLI Plugin ui5.yaml > server > customMiddlware > ui5-middleware-approuter: setauthenticationMethodtoroute(see config example above)xs-app.json(also at the root/of your UI5 app):- set
authenticationMethodtoroute - in the route with the desired protected authentication, set
authenticationTypetoxsuaa
- set
see ./test/auth/**/* for example files for the above!
q: what's allowLocalDir for?
a: allows to protect local static assets (e.g. html files) -in addition to destinations- with approuter as well.
see test/auth/xs-app-with-localDir.json for an example!
License
This work is licensed under Apache 2.0.
Built with care (and a lot of caffeine). If this helped you build, test, or ship, the next coffee — or drink — is on you when you bump into a contributor.
History
Features 1, Fixes 1
Notes
Minor Changes
- #1370
dd71c42Thanks @petermuessig! - Upgradehttp-proxy-middlewareto v4. v4 ships as ESM-only and requires Node >= 22.15.0 (already the CI baseline). The exposed API surface used here (target,changeOrigin,secure,agent,auth,headers,pathFilter,pathRewrite,selfHandleResponse,xfwd,autoRewrite,on.proxyReq/proxyRes,responseInterceptor,proxyMiddleware.upgrade) is unchanged; therequire()calls were switched to dynamicawait import()inside the existing async scopes — same pattern already used forproxy-from-envandhttps-proxy-agent.
Patch Changes
- #1370
dd71c42Thanks @petermuessig! - Bump runtime dependencies to clear open dependabot alerts and pick up upstream patch releases:cds-plugin-ui5:semver^7.8.0 → ^7.8.1ui5-middleware-approuter:@sap/approuter^22.0.0 → ^22.0.1ui5-middleware-serveframework:node-fetch^2.7.0 → ^3.3.2ui5-middleware-websocket:ws^8.20.1 → ^8.21.0ui5-task-copyright:@typescript-eslint/typescript-estree^8.59.3 → ^8.60.0ui5-tooling-transpile:@babel/core,@babel/preset-env,@babel/preset-typescript→ ^7.29.7
All notable changes to this project will be documented in this file. See Conventional Commits for commit guidelines.
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Breaking 26, Features 1
Notes
Features
BREAKING CHANGES
-
new package manager
-
refactor: updated tests to pass with pnpm
-
refactor: iasync still failing
-
feat(ui5-tooling-modules): support pnpm / node_modules symlinks
-
fix(ui5-app): make Karma work with pnpm
-
chore(ui5-app): remove uiveri5 from sample
-
chore(ui5-app): add updated wdio.conf
-
fix: make prettier and eslint work with pnpm
-
fix: fix cf_dest tests
restructured tests and added node_modules as symlink
-
fix(ui5-app): adding eslint for wdio and mocha
-
chore(ui5-middleware-cfdestination): cleanup
-
feat(ui5-tooling-modules): add bundling support for AMD
-
chore(ui5-tooling-modules): cleanup
-
chore: fix code style
-
fix(ui5-task-flatten-library): support files without extensions
-
refactor: updated tests to pass with pnpm
-
feat(ui5-tooling-modules): support pnpm / node_modules symlinks
-
fix: make prettier and eslint work with pnpm
-
fix: update actions, lerna, vscode for pnpm
-
chore: only run test on tooling extensions
-
chore: use sequential tests for ava
-
chore: add @ui5/cli dev dependency for ava tests
-
chore: enable support for local act GH action tests
-
chore: add docu for local GitHub action execution
-
chore: docu cleanup
-
chore: re-add ncu scripts
Co-authored-by: Peter Muessig peter.muessig@sap.com
-
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