Parse error Invalid JSON. An error occurred on the server while parsing the JSON text.

Describe the bug Zabbix API cannot be accessed by v4.0.0-alpha4 plugin, while v3.12.2 and older versions could. When saving config of zabbix datasource, the following message appears:

Parse error Invalid JSON. An error occurred on the server while parsing the JSON text.

Expected behavior Datasource configuration should be saved correctly. From grafana server, the following command returns a normal response: curl -k -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"apiinfo.version","params":[],"id":1}' https://zabbix/api_jsonrpc.php returns: {"jsonrpc":"2.0","result":"5.0.1","id":1}

Screenshots Here is my datasource conf, which works properly in stable versions:

The error message that I get when I click on ‘Save & Test’ button:

Software versions

Grafana	Zabbix	Grafana-Zabbix Plugin
7.1.1	5.0.1	4.0.0-alpha4

[mplm17]

@alexanderzobnin Here it is:

Here are 2 others examples that are working good, so we can see the differences:

-with postman:

-from another zabbix api client:

With these outputs, I tried to reproduce the problem on postman by setting the same headers that are set in grafana requests. It seems that if “Content-Length” header is set, it works properly, but if it’s not set, we have the parse error…

Hope this will help

[alexanderzobnin]

Ok, tried to solve it. Could anyone test it out and confirm that bug fixed? Here’s a built package for all platforms. Just unpack it into grafana plugins folder.

grafana-zabbix-8f70a0c.zip