Grabbing environment variables configured in a jar file using JavaScript

Question

I'm working on a web application that uses spring boot, JavaScript and REST API to interact with the database. I have a jar file where I configured several environment variables that store urls and parts of urls. In Spring Boot controller I used the following line to grab an environment variable:

@Resource 
private Environment environment;
String prefix = environment.getProperty("rest.resource.name");

Is there something equivalent I could use with JavaScript to perform this operation?

No, client side JS can't interact with the underlying system. You need to ask the server to send it to you — Tomer
– Tomer, Commented Jun 7, 2016 at 14:57

Dimitri Mestdagh · Accepted Answer · 2016-06-07 19:25:41Z

2

You can't do that directly, however, you could use a templating language (Thymeleaf, Velocity or even JSPs) and put a <script> block inside your template.

An example with Thymeleaf:

<script th:inline="javascript">
  /*<![CDATA[*/
    var myProperty = /*[[${@environment.getProperty('rest.resource.name')}]]*/ null;   
</script>

Now you can use myProperty inside your JavaScript code (at least if you put your JavaScript sources below this script block in your HTML page).

With JSP you can do a similar thing:

<spring:eval expression="@environment.getProperty('rest.resource.name')" var="myProperty"/>
<script type="text/javascript">
    var myProperty = '${myProperty}';
</script>

answered Jun 7, 2016 at 19:25

Dimitri Mestdagh

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