api: add system_info endpoint

internal/api/v1/system_info.go

@@ -0,0 +1,38 @@
+package v1
+
+import (
+	"net/http"
+
+	agentPkg "github.com/yusing/go-proxy/agent/pkg/agent"
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	config "github.com/yusing/go-proxy/internal/config/types"
+	"github.com/yusing/go-proxy/internal/metrics"
+)
+
+func SystemInfo(cfg config.ConfigInstance, w http.ResponseWriter, r *http.Request) {
+	agentName := r.FormValue("agent_name")
+	if agentName == "" {
+		info, err := metrics.GetSystemInfo(r.Context())
+		if err != nil {
+			U.HandleErr(w, r, err)
+			return
+		}
+		U.RespondJSON(w, r, info)
+	} else {
+		agent, ok := cfg.GetAgent(agentName)
+		if !ok {
+			U.HandleErr(w, r, U.ErrInvalidKey("agent_name"), http.StatusNotFound)
+			return
+		}
+		respData, status, err := agent.Fetch(r.Context(), agentPkg.EndpointSystemInfo)
+		if err != nil {
+			U.HandleErr(w, r, err)
+			return
+		}
+		if status != http.StatusOK {
+			http.Error(w, string(respData), status)
+			return
+		}
+		U.RespondJSON(w, r, respData)
+	}
+}