Syntax for sendHttpGetRequest in OH3 ECMA script?

Pedals2Paddles · December 29, 2020, 6:35am

I’ve looked far and wide and not finding the answer to this one. In DSL, it is as simple as sendHttpGetRequest(url,timeout).

Doing this in an OpenHab 3 ECMA script generates an error Script execution of rule with UID 'camera_trigger_all' failed: ReferenceError: "sendHttpGetRequest" is not defined in <eval> .

I’m not surprised it needs to be coded a little different. Just can’t find it.

Pedals2Paddles · January 1, 2021, 4:33am

Anyone?

candiesdoodle · January 1, 2021, 4:57am

Though if the returned output is gzip encoded then I dont know how to decode that
Better to use the http binding

Pedals2Paddles · January 1, 2021, 1:46pm

One line in DSL is now 15 lines of code? There must be something I’m missing here?

Confectrician · January 1, 2021, 7:05pm

I am using http requests in my ECMA Script rules to send commands to my radio.
For me it works to add the HttpUtil namespace in the rule an then use the executeurl function.

Example:

var HttpUtil        = Java.type("org.openhab.core.io.net.http.HttpUtil")

HttpUtil.executeUrl("GET", radioIpAdress + "/main/setVolume?volume=up&step=1", 2000)

Java function from openhab-core for reference:

github.com

openhab/openhab-core/blob/master/bundles/org.openhab.core.io.net/src/main/java/org/openhab/core/io/net/http/HttpUtil.java#L89


 * Executes the given <code>url</code> with the given <code>httpMethod</code>.
 * Furthermore the <code>http.proxyXXX</code> System variables are read and
 * set into the {@link HttpClient}.
 *
 * @param httpMethod the HTTP method to use
 * @param url the url to execute
 * @param timeout the socket timeout in milliseconds to wait for data
 * @return the response body or <code>NULL</code> when the request went wrong
 * @throws IOException when the request execution failed, timed out or it was interrupted
 */
public static String executeUrl(String httpMethod, String url, int timeout) throws IOException {
    return executeUrl(httpMethod, url, null, null, timeout);
}
/**
 * Executes the given <code>url</code> with the given <code>httpMethod</code>.
 * Furthermore the <code>http.proxyXXX</code> System variables are read and
 * set into the {@link HttpClient}.
 *
 * @param httpMethod the HTTP method to use
 * @param url the url to execute

chrismast · January 2, 2021, 11:05am

Thanks for the code snippet!
Was looking for hours to do the same (pinging healthchecks.io) and did not find any good solution to translate the sendHttpGetRequest to ECMA. With your code it works!

Pedals2Paddles · January 3, 2021, 12:09am

Fantastic! That’s way better than 15 lines of code. Thanks

Boby · January 11, 2021, 7:00pm

But to come back to the original problem: I don’t see it as very handy to find out the correct namespace before being able to use functions like these.

And the devs also see this as a problem: