Migrate to new backend sdk, use /zabbix-api endpoint for API queries

pkg/resource_handler.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/grafana/grafana-plugin-sdk-go/backend/resource/httpadapter"
+)
+
+func (ds *ZabbixDatasource) rootHandler(rw http.ResponseWriter, req *http.Request) {
+	ds.logger.Debug("Received resource call", "url", req.URL.String(), "method", req.Method)
+
+	rw.Write([]byte("Hello from Zabbix data source!"))
+	rw.WriteHeader(http.StatusOK)
+}
+
+func (ds *ZabbixDatasource) zabbixAPIHandler(rw http.ResponseWriter, req *http.Request) {
+	ds.logger.Debug("Received resource call", "url", req.URL.String(), "method", req.Method)
+
+	if req.Method != http.MethodPost {
+		return
+	}
+
+	body, err := ioutil.ReadAll(req.Body)
+	defer req.Body.Close()
+	if err != nil || len(body) == 0 {
+		rw.WriteHeader(http.StatusBadRequest)
+	}
+
+	var reqData ZabbixAPIResourceRequest
+	err = json.Unmarshal(body, &reqData)
+
+	pluginCxt := httpadapter.PluginConfigFromContext(req.Context())
+	ds.logger.Debug("Received Zabbix API call", "ds", pluginCxt.DataSourceInstanceSettings.Name)
+
+	dsInstance, err := ds.GetDatasource(pluginCxt.OrgID, pluginCxt.DataSourceInstanceSettings)
+	ds.logger.Debug("Data source found", "ds", dsInstance.dsInfo.Name)
+
+	apiReq := &ZabbixAPIRequest{Method: reqData.Method, Params: reqData.Params}
+	result, err := dsInstance.ZabbixAPIQuery(req.Context(), apiReq)
+	resultJson, err := json.Marshal(*result)
+	ds.logger.Debug("Got response", "result", result)
+
+	ds.logger.Debug("Received Zabbix API call", "ds", reqData.DatasourceId, "method", reqData.Method, "params", reqData.Params)
+
+	rw.Write(resultJson)
+	rw.WriteHeader(http.StatusOK)
+}