Initial QSfera import

Server/pkg/checks/checkhttp.go

@@ -0,0 +1,35 @@
+package checks
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/qsfera/server/pkg/handlers"
+)
+
+// NewHTTPCheck checks the reachability of a http server.
+func NewHTTPCheck(url string) func(context.Context) error {
+	return func(_ context.Context) error {
+		url, err := handlers.FailSaveAddress(url)
+		if err != nil {
+			return err
+		}
+
+		if !strings.HasPrefix(url, "http://") && !strings.HasPrefix(url, "https://") {
+			url = "http://" + url
+		}
+
+		c := http.Client{
+			Timeout: 3 * time.Second,
+		}
+		resp, err := c.Get(url)
+		if err != nil {
+			return fmt.Errorf("could not connect to http server: %v", err)
+		}
+		_ = resp.Body.Close()
+		return nil
+	}
+}