# \[solved\] Extracting value from String after http request

**URL:** <https://discourse.nodered.org/t/solved-extracting-value-from-string-after-http-request/31345>\
**Category:** General\
**Created:** [9 August 2020 15:05 UTC](https://discourse.nodered.org/t/solved-extracting-value-from-string-after-http-request/31345 "2020-08-09T15:05:52Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tomas](https://avatars.discourse-cdn.com/v4/letter/t/439d5e/32.png) [@Tomas](https://discourse.nodered.org/u/Tomas)\
**Post date:** [9 August 2020 15:05 UTC](https://discourse.nodered.org/t/solved-extracting-value-from-string-after-http-request/31345/1 "2020-08-09T15:05:52Z")

</div>

Hi,  
I am new with node red and now I love it.  
I have already connected my Fronius and Volkszähler with node-red-contrib-fronius-solar and node-red-contrib-volkszaehler withe no problems.

Now I want to connect our heating from ETA Heiztechnik GmbH

I can read the amount of wood pellets via:  
[http://192.168.0.77:8080/user/var/40/10201/0/0/12015](http://192.168.0.77:8080/user/var/40/10201/0/0/12015)

With HTTP-request I get that as a one string:

```auto
<eta xmlns="http://www.eta.co.at/rest/v1" version="1.0"> <value uri="/user/var/40/10201/0/0/12015" strValue="2673" unit="kg" decPlaces="0" scaleFactor="10" advTextOffset="0">26730</value>
</eta>

```

With a funktion

```auto
msg.payload = msg.payload.split('strValue="')[1].substr(0,4);
msg.payload = Number(msg.payload);
return msg;

```

I can extract the amount of pellets = 2673

Now I have a problem:  
If there is only 999 , than substr(0,4) will not work.

So how can I serach and extract the value for 4 digits and 3 digits or 2 digets?

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<div class="post-metadata">

**Author:** ![sharonv](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@sharonv](https://discourse.nodered.org/u/sharonv)\
**Post date:** [9 August 2020 15:12 UTC](https://discourse.nodered.org/t/solved-extracting-value-from-string-after-http-request/31345/2 "2020-08-09T15:12:03Z")

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Hi.  
You can use the MXL node to parse the xml and have access to your value regardless of text parsing.

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<div class="post-metadata">

**Author:** ![Tomas](https://avatars.discourse-cdn.com/v4/letter/t/439d5e/32.png) [@Tomas](https://discourse.nodered.org/u/Tomas)\
**Post date:** [9 August 2020 15:23 UTC](https://discourse.nodered.org/t/solved-extracting-value-from-string-after-http-request/31345/3 "2020-08-09T15:23:17Z")

</div>

Perfect it wokrs.

Thank you very much

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [23 August 2020 15:23 UTC](https://discourse.nodered.org/t/solved-extracting-value-from-string-after-http-request/31345/4 "2020-08-23T15:23:18Z")

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