Initial commit

checker/interactive.go

@@ -0,0 +1,92 @@
+package checker
+
+import (
+	"errors"
+	"net/http"
+	"strings"
+
+	sdk "git.happydns.org/checker-sdk-go/checker"
+)
+
+// RenderForm exposes the minimal set of fields a human needs to fire a
+// standalone Kerberos probe via GET /check.
+func (p *kerberosProvider) RenderForm() []sdk.CheckerOptionField {
+	return []sdk.CheckerOptionField{
+		{
+			Id:          "realm",
+			Type:        "string",
+			Label:       "Kerberos realm",
+			Placeholder: "EXAMPLE.COM",
+			Required:    true,
+			Description: "DNS domain advertising the realm (the realm name itself is derived in uppercase).",
+		},
+		{
+			Id:          "principal",
+			Type:        "string",
+			Label:       "Principal (optional)",
+			Placeholder: "user@EXAMPLE.COM",
+			Description: "Supply to run an authenticated round-trip. Leave blank for anonymous probes only.",
+		},
+		{
+			Id:     "password",
+			Type:   "string",
+			Label:  "Password (optional)",
+			Secret: true,
+		},
+		{
+			Id:          "targetService",
+			Type:        "string",
+			Label:       "Service to request (TGS)",
+			Placeholder: "host/host.example.com",
+		},
+		{
+			Id:      "timeout",
+			Type:    "number",
+			Label:   "Per-probe timeout (seconds)",
+			Default: 5,
+		},
+		{
+			Id:      "requireStrongEnctypes",
+			Type:    "bool",
+			Label:   "Require strong enctypes",
+			Default: true,
+		},
+		{
+			Id:      "maxClockSkew",
+			Type:    "number",
+			Label:   "Max tolerated clock skew (seconds)",
+			Default: 300,
+		},
+	}
+}
+
+// ParseForm turns the submitted form into a CheckerOptions. Collect handles
+// the SRV / DNS discovery itself, so there is nothing to auto-fill here
+// beyond the raw inputs.
+func (p *kerberosProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
+	realm := strings.TrimSpace(r.FormValue("realm"))
+	if realm == "" {
+		return nil, errors.New("realm is required")
+	}
+
+	opts := sdk.CheckerOptions{"realm": realm}
+
+	if v := strings.TrimSpace(r.FormValue("principal")); v != "" {
+		opts["principal"] = v
+	}
+	if v := r.FormValue("password"); v != "" {
+		opts["password"] = v
+	}
+	if v := strings.TrimSpace(r.FormValue("targetService")); v != "" {
+		opts["targetService"] = v
+	}
+	if v := strings.TrimSpace(r.FormValue("timeout")); v != "" {
+		opts["timeout"] = v
+	}
+	if v := strings.TrimSpace(r.FormValue("maxClockSkew")); v != "" {
+		opts["maxClockSkew"] = v
+	}
+	opts["requireStrongEnctypes"] = r.FormValue("requireStrongEnctypes") == "true"
+
+	return opts, nil
+}