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sdk/nodejs/examples/http-server/README.md
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sdk/nodejs/examples/http-server/README.md
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# "http-server" SDK Example
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This `http-server` example is a minimal `zrok` application that surfaces a basic http server over a private zrok share.
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## Implementation
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```js
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let root = zrok.Load()
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```
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The `root` is a structure that contains all of the user's environment detail and allows the SDK application to access the `zrok` service instance and the underlying OpenZiti network.
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```js
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let shr = await zrok.CreateShare(root, new zrok.ShareRequest(zrok.PROXY_BACKEND_MODE, zrok.PRIVATE_SHARE_MODE, "http-server", ["private"]));
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console.log(`access your private HTTP Server on another machine using: 'zrok access private ${shr.Token}'`)
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```
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The `zrok.CreateShare` call uses the loaded `environment` root along with the details of the share request (`zrok.ShareRequest`) to create the share that will be used to access the `http-server`.
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We are using the `zrok.PROXY_BACKEND_MODE` to handle tcp traffic. This time we are using `zrok.PRIVATE_SHARE_MODE` to take advantage of a private share that is running. With that we set which frontends to listen on, so we use whatever is configured, `private` here.
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Further down we emit where to access the service.
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Then we create a NodeJS Express web server that is configured to listen for ONLY incoming Ziti connections. No TCP connections from the open internet are possible.
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```js
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let app = zrok.express( shr.Token );
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...
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app.listen(undefined, () => {
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console.log(`private HTTP Server is now listening for incoming requests`)
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})
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...
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app.get('/', function(_: Request, res: any){
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...
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}
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```
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Then we create a signal handler that catches CTRL-C. When that signal is caught, we tear down teh zrok share, and exit the process.
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```js
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process.on('SIGINT', async () => {
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console.log("Now deleting your private zrok share...")
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await zrok.DeleteShare(root, shr)
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process.exit(15);
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});
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```
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## How to execute this example
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You should first set up and enable your local `zrok` environment. Then execute the following cmds:
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```cmd
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npm install
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node dist/index.js http-server
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```
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When the example app begins execution, you should see output on the console that resembles the following:
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```
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Now creating your private zrok share...
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access your private HTTP Server on another machine using: 'zrok access private <SOME_TOKEN>'
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private HTTP Server is now listening for incoming requests
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```
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Later, when you are done using the http-server, you can press CTRL_C, and the app will shut down, like this:
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```
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Now deleting your private zrok share...
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```
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{
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"dependencies": {
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"@openziti/ziti-sdk-nodejs": "^0.14.2",
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"commander": "^11.1.0",
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"express": "^4.18.2",
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"path": "^0.12.7",
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"readline-sync": "^1.4.10",
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"zrok": "../../sdk/dist"
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"@openziti/zrok": "^0.1.0"
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},
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"devDependencies": {
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"@types/node": "^20.9.0",
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{
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"dependencies": {
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"@openziti/ziti-sdk-nodejs": "^0.14.2",
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"commander": "^11.1.0",
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"express": "^4.18.2",
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"path": "^0.12.7",
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"readline-sync": "^1.4.10",
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"zrok": "../../sdk/dist"
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"@openziti/zrok": "^0.1.0"
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},
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"devDependencies": {
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"@types/node": "^20.9.0",
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