1 files changed, 117 insertions, 0 deletions
diff --git a/src/go/plugin/go.d/modules/monit/collect.go b/src/go/plugin/go.d/modules/monit/collect.go
new file mode 100644
index 000000000..580aa6d99
--- /dev/null
+++ b/src/go/plugin/go.d/modules/monit/collect.go
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package monit
+
+import (
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+
+	"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/web"
+
+	"golang.org/x/net/html/charset"
+)
+
+var (
+	urlPathStatus  = "/_status"
+	urlQueryStatus = url.Values{"format": {"xml"}, "level": {"full"}}.Encode()
+)
+
+func (m *Monit) collect() (map[string]int64, error) {
+	mx := make(map[string]int64)
+
+	if err := m.collectStatus(mx); err != nil {
+		return nil, err
+	}
+
+	return mx, nil
+}
+
+func (m *Monit) collectStatus(mx map[string]int64) error {
+	status, err := m.fetchStatus()
+	if err != nil {
+		return err
+	}
+
+	if status.Server == nil {
+		// not Monit
+		return errors.New("invalid Monit status response: missing server data")
+	}
+
+	mx["uptime"] = status.Server.Uptime
+
+	seen := make(map[string]bool)
+
+	for _, svc := range status.Services {
+		seen[svc.id()] = true
+
+		if _, ok := m.seenServices[svc.id()]; !ok {
+			m.seenServices[svc.id()] = svc
+			m.addServiceCheckCharts(svc, status.Server)
+		}
+
+		px := fmt.Sprintf("service_check_type_%s_name_%s_status_", svc.svcType(), svc.Name)
+
+		for _, v := range []string{"not_monitored", "ok", "initializing", "error"} {
+			mx[px+v] = 0
+			if svc.status() == v {
+				mx[px+v] = 1
+			}
+		}
+	}
+
+	for id, svc := range m.seenServices {
+		if !seen[id] {
+			delete(m.seenServices, id)
+			m.removeServiceCharts(svc)
+		}
+	}
+
+	return nil
+}
+
+func (m *Monit) fetchStatus() (*monitStatus, error) {
+	req, err := web.NewHTTPRequestWithPath(m.Request, urlPathStatus)
+	if err != nil {
+		return nil, err
+	}
+	req.URL.RawQuery = urlQueryStatus
+
+	var status monitStatus
+	if err := m.doOKDecode(req, &status); err != nil {
+		return nil, err
+	}
+
+	return &status, nil
+}
+
+func (m *Monit) doOKDecode(req *http.Request, in interface{}) error {
+	resp, err := m.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("error on HTTP request '%s': %v", req.URL, err)
+	}
+	defer closeBody(resp)
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("'%s' returned HTTP status code: %d", req.URL, resp.StatusCode)
+	}
+
+	dec := xml.NewDecoder(resp.Body)
+	dec.CharsetReader = charset.NewReaderLabel
+
+	if err := dec.Decode(in); err != nil {
+		return fmt.Errorf("error on decoding XML response from '%s': %v", req.URL, err)
+	}
+
+	return nil
+}
+
+func closeBody(resp *http.Response) {
+	if resp != nil && resp.Body != nil {
+		_, _ = io.Copy(io.Discard, resp.Body)
+		_ = resp.Body.Close()
+	}
+}