Push setting - HTTP 3 (GET) - doesn't send all the data

[Corentin WAUTHOZ]

When I use HTTP 3 (GET) push setting, it truncate the end of the XML data

configure push setting HTTP 3 (GET) Ex : http://<IP>:<PORT>/<TOKEN>?content=
and configure format editor "HTTP option 3 GET" with this template for ex :
<prtg><result><channel>Densite</channel><float>1</float><value>${gravity}</value></result><result><channel>Batterie</channel><float>1</float><value>${battery}</value></result><result><channel>Temperature</channel><float>1</float><value>${temp}</value></result></prtg>
should return (as the test button do) :
<prtg><result><channel>Densite</channel><float>1</float><value>31.7695</value></result><result><channel>Batterie</channel><float>1</float><value>4.28</value></result><result><channel>Temperature</channel><float>1</float><value>21.5</value></result></prtg>
But it truncate the end of the message like this :
<prtg><result><channel>Densite</channel><float>1</float><value>31.7695</value></result><result><channel>Batterie</channel><float>1</float><value>4.28</value></result><result><channel>Temperature</channel><float>1</float><value>21.5</value></re

See wireshark capture :

if I add dummy char at the end it truncate the dummy char and it works but it's not always "truncating" the same amount of chars.

Software:

• Platform esp8266
• Browser chrome
• Version 1.2.0 (..90a5cb)

Goal is to send HTTP push notification to PRTG Monitoring server.

[Magnus]

Sorry for the late reply but I never got a notification on this issue.

HTTP get is not intended to be used to send XML it uses the format http://?token1=value&token2=value2 according to the specification. In theory you can send an xml document as a value if you URL encode the value (which is not a feature that is implemented in gravitymon)

If you want to send XML you can do this using HTTP Post in the body of the message. So use HTTP 1 or 2. Depending on the receiving service you might need to set the right content header to tell the server that you are sending an XML document.

[Magnus]

Its a little strange that the data is truncated, i will have a look what causes this. Its not strange that you get a different result on the test button since this is don in the web browser and not in the device.

[Corentin WAUTHOZ]

Hi, First thanks a lot for sharing your great job with this firmware. I know it's a bit strange to encode the XML in the URL but it's how the PRTG sensor works according to the documentation  I don't find other sensor where I could send the data in the body that's why I tried this workaround. And yes it's even more strange that it doesn't truncate the same amount of character. I don't find any logic. Regards,

[Magnus]

Thanks for the feedback. The playload should not be truncatated so i will treat this as a bug.

I could not spot anything strange in the code so I hope this is not a limitation in the arduino code

[Magnus]

Can you try this build and see if it works for you ? https://github.com/mp-se/gravitymon/blob/dev/bin/firmware.bin

[Corentin WAUTHOZ]

Thank you for the new version of the firmware, for the moment it looks like it solved the issue.
I will try JSON format and multiple reboot asap to make sure.

[Magnus]

Its just a small code change that should not affect but i will run through some tests to make sure it works

[Magnus]

I've just released the official tested version, should be the same as the one that you tested.