add api & config

api/config.go

@@ -0,0 +1,118 @@
+package api
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-gost/x/config"
+)
+
+// swagger:parameters getConfigRequest
+type getConfigRequest struct {
+	// output format, one of yaml|json, default is json.
+	// in: query
+	Format string `form:"format" json:"format"`
+}
+
+// successful operation.
+// swagger:response getConfigResponse
+type getConfigResponse struct {
+	Config *config.Config
+}
+
+func getConfig(ctx *gin.Context) {
+	// swagger:route GET /config ConfigManagement getConfigRequest
+	//
+	// Get current config.
+	//
+	//     Security:
+	//       basicAuth: []
+	//
+	//     Responses:
+	//       200: getConfigResponse
+
+	var req getConfigRequest
+	ctx.ShouldBindQuery(&req)
+
+	var resp getConfigResponse
+	resp.Config = config.Global()
+
+	buf := &bytes.Buffer{}
+	switch req.Format {
+	case "yaml":
+	default:
+		req.Format = "json"
+	}
+
+	resp.Config.Write(buf, req.Format)
+
+	contentType := "application/json"
+	if req.Format == "yaml" {
+		contentType = "text/x-yaml"
+	}
+
+	ctx.Data(http.StatusOK, contentType, buf.Bytes())
+}
+
+// swagger:parameters saveConfigRequest
+type saveConfigRequest struct {
+	// output format, one of yaml|json, default is yaml.
+	// in: query
+	Format string `form:"format" json:"format"`
+}
+
+// successful operation.
+// swagger:response saveConfigResponse
+type saveConfigResponse struct {
+	Data Response
+}
+
+func saveConfig(ctx *gin.Context) {
+	// swagger:route POST /config ConfigManagement saveConfigRequest
+	//
+	// Save current config to file (gost.yaml or gost.json).
+	//
+	//     Security:
+	//       basicAuth: []
+	//
+	//     Responses:
+	//       200: saveConfigResponse
+
+	var req saveConfigRequest
+	ctx.ShouldBindQuery(&req)
+
+	file := "gost.yaml"
+	switch req.Format {
+	case "json":
+		file = "gost.json"
+	default:
+		req.Format = "yaml"
+	}
+
+	f, err := os.Create(file)
+	if err != nil {
+		writeError(ctx, &Error{
+			statusCode: http.StatusInternalServerError,
+			Code:       40005,
+			Msg:        fmt.Sprintf("create file: %s", err.Error()),
+		})
+		return
+	}
+	defer f.Close()
+
+	if err := config.Global().Write(f, req.Format); err != nil {
+		writeError(ctx, &Error{
+			statusCode: http.StatusInternalServerError,
+			Code:       40006,
+			Msg:        fmt.Sprintf("write: %s", err.Error()),
+		})
+		return
+	}
+
+	ctx.JSON(http.StatusOK, Response{
+		Msg: "OK",
+	})
+}