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This document is a tutorial of the feature ‘'Should Append Parameters from URL with existing one to override’'.

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It is possible to append CMDLine Arguments with existing ones. This can be used for authentication / token purposes.

Prepare to execute instructions

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For this document you need to:

  • To complete this guide, your working environment must meet all the requirements above. If you have not completed any of the points, follow the link to the appropriate instruction and complete it first.

Instructions

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Then copy your URL, it will look something like this

Step 1. Prepare the setup

Follow this tutorial first to follow along with the next steps Send Commands to your App from Parameters to Pass to App

STEP 2. Enter -green in the text field of Parameters to Pass to App. Click Save

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Go to: Control Panel → Step 2: Config Selection → Edit → Developer Option → Enter -green → Save.

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Step 3. Enable Should append parameters from URL with existing one to override. Click Save

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UE will receive the command during runtime. The color of the sphere will be green when you run the game.

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Step 3. Open the game. Run to the 12th bay

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Go to: Control Panel →Step 3: Generate URLs → Play App → Run to the 12th bay

The color of the sphere is green.

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Step 4. Copy the App URL

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Go to : Control Panel → Step 3: Generate URLs → Copy App URL

This is the URL you would get:

https://connector.eagle3dstreaming.com/v5/demo/E3DSFeaturesTemplate/CmdLineDemo

Now that you have checked ‘'should append overiding cmdLine Argument with existing one?’, you are able to add

Step 5. Add additional command lines to the

URL, by adding ‘

App URL

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Add '?exeLunchArgs=-[variable]' to the end of the URL.

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For example

, say I wanted to add '-blue' to my URL. I will first start with this URL

:

https://connector.eagle3dstreaming.com/v5/demo/E3DSFeaturesTemplate/CmdLineDemoAnd then I would add ‘

Add '?exeLunchArgs=-blue' to the end of it

. My URL now looks

like

this

so :

https://connector.eagle3dstreaming.com/v5/demo/E3DSFeaturesTemplate/CmdLineDemo?exeLunchArgs=-blue

The system has now appended the additional command and has sent both the command added into the config and the command added into the URL to the UE game.

Example:

https://connector.eagle3dstreaming.com/v5/demo/E3DSFeaturesTemplate/E3DS-Iframe-Demo?exeLunchArgs=-green pink red

Step 6. Open the game. Run to the 12th bay

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When you click on https://connector.eagle3dstreaming.com/v5/demo/E3DSFeaturesTemplate/CmdLineDemo?exeLunchArgs=-blue,

your output will look something like this( where

2 values

is

will be getting parsed from two

place in cmdline args): Image Removedtip

places in CMDLine arguments in the game.

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Now that we are familiar with how the appending system works, we can explore how this is used for authentication.

For example, say I want to authenticate

Step 7. Authenticate by a user’s

email address: info

Email address

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On the URL side, append

(we assume you know how to do this programmatically on your end)

the user’s email address to the URL, so that it looks like this:

(assuming that you know how to do this programmatically)

https://connector.eagle3dstreaming.com/v5/demo/E3DSFeaturesTemplate/CmdLineDemo?exeLunchArgs=-user=myEmailAddress@gmail.com

(this link will not work and is for demonstration purposes only).

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By adding the email address into the URL (

yes

the '@' sign is an accepted character),

you will be able to pass the email address into your UE app where you can then proceed with the authentication.

Within the E3DSFeaturesTemplate App, there is a blueprint showing how to receive a value

(in the E3DSFeaturesTemplate example we show how to use the

command line

Command Line to get an IP Address for multiplayer).

Tip

Voila! You are now ready to authenticate your UE visitors sending their email address through the command lineCommand Line!

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Special data:
%ip_streamer% will pass the IP address of the machine where UE app is running

%ip_ss% will pass the IP address of the Signaling server

%port_streamer2ss% will pass the port of the Signaling server through which UE app communicates with the signaling server

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In Parameters If I put :
-bb=%ip_streamer% -aa=%ip_ss%:%port_streamer2ss%

Then the output would be something like thisthis is the Output :

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