feat(serverHandler): output json data if param is "json" for file list

Author: marjune163

src/serverHandler/json.go

@@ -0,0 +1,71 @@
+package serverHandler
+
+import (
+	"encoding/json"
+	"net/http"
+	"os"
+	"time"
+)
+
+type jsonItem struct {
+	IsDir   bool      `json:"isDir"`
+	Name    string    `json:"name"`
+	Size    int64     `json:"size"`
+	ModTime time.Time `json:"modTime"`
+}
+
+type jsonResponseData struct {
+	Item     *jsonItem   `json:"item"`
+	SubItems []*jsonItem `json:"subItems"`
+}
+
+func getJsonItem(info os.FileInfo) *jsonItem {
+	return &jsonItem{
+		IsDir:   info.IsDir(),
+		Name:    info.Name(),
+		Size:    info.Size(),
+		ModTime: info.ModTime(),
+	}
+}
+
+func getJsonData(data *responseData) *jsonResponseData {
+	var item *jsonItem
+	var subItems []*jsonItem
+
+	if data.Item != nil {
+		item = getJsonItem(data.Item)
+
+		if data.Item.IsDir() {
+			subItems = make([]*jsonItem, len(data.SubItems))
+			for i, dataItem := range data.SubItems {
+				subItems[i] = getJsonItem(dataItem.Info)
+			}
+		}
+	}
+
+	return &jsonResponseData{
+		Item:     item,
+		SubItems: subItems,
+	}
+}
+
+func (h *handler) json(w http.ResponseWriter, r *http.Request, data *responseData) {
+	header := w.Header()
+	header.Set("Content-Type", "application/json; charset=utf-8")
+	header.Set("Cache-Control", "public, max-age=0")
+
+	if data.hasInternalError {
+		w.WriteHeader(http.StatusInternalServerError)
+	} else if data.hasNotFoundError {
+		w.WriteHeader(http.StatusNotFound)
+	} else {
+		w.WriteHeader(http.StatusOK)
+	}
+
+	if needResponseBody(r.Method) {
+		jsonData := getJsonData(data)
+		encoder := json.NewEncoder(w)
+		err := encoder.Encode(jsonData)
+		h.errHandler.LogError(err)
+	}
+}

src/serverHandler/main.go

@@ -104,7 +104,9 @@ func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	item := data.Item
-	if file != nil && item != nil && !item.IsDir() {
+	if r.URL.RawQuery == "json" {
+		h.json(w, r, data)
+	} else if file != nil && item != nil && !item.IsDir() {
 		h.content(w, r, data)
 	} else {
 		h.page(w, r, data)

src/serverHandler/responseData.go

@@ -13,8 +13,8 @@ import (
 )
 
 type pathEntry struct {
-	Name string
-	Path string
+	Name string `json:"name"`
+	Path string `json:"path"`
 }
 
 type subItemSort struct {