Add feature to hold configs in filesystem

This patch adds feature to hold config files
on filesystem and adds all unit tests to have
enough coverage for milestones.

Change-Id: Icd6f3dc93e0f419500f82f0a6ccd62e500dfc918
Issue-ID: MUSIC-42
Signed-off-by: Shashank Kumar Shankar <shashank.kumar.shankar@intel.com>

1 files changed, 177 insertions, 0 deletions

diff --git a/src/dkv/api/configHandlers.go b/src/dkv/api/configHandlers.go
new file mode 100644
index 0000000..f5bac34
--- /dev/null
+++ b/src/dkv/api/configHandlers.go
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2018 Intel Corporation, Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package api
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/gorilla/mux"
+	"io"
+	"mime/multipart"
+	"net/http"
+)
+
+type UploadConfigBody struct {
+	Token     string
+	File      multipart.File
+	Subdomain string
+}
+
+type LoadConfigBody struct {
+	Token     string `json:"token"`
+	Filename  string `json:"filename"`
+	Subdomain string `json:"subdomain"`
+}
+
+func ValidateLoadConfigBody(body LoadConfigBody) error {
+	if body.Token == "" {
+		return errors.New("Token not set. Please set Token in POST.")
+	}
+	return nil
+}
+
+func HandleConfigUpload(w http.ResponseWriter, r *http.Request) {
+	r.ParseMultipartForm(100000) // 2k bytes?
+	file, handler, err := r.FormFile("configFile")
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, "Error in uploaded file.")
+		return
+	}
+	defer file.Close()
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+		return
+	}
+
+	token := r.Form.Get("token")
+	subdomain := r.Form.Get("subdomain")
+
+	if token == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "Token not present in Form data.")
+		return
+	}
+
+	var filename = ""
+	if subdomain != "" {
+		filename += token + "/" + subdomain + "/" + handler.Filename
+	} else {
+		filename += token + "/" + handler.Filename
+	}
+
+	f, err := Directory.CreateFile(MOUNTPATH + filename)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+		return
+	}
+	defer f.Close()
+	io.Copy(f, file)
+}
+
+func HandleConfigLoad(w http.ResponseWriter, r *http.Request) {
+
+	var body LoadConfigBody
+
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&body)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusBadRequest, "Empty body.")
+		return
+	}
+
+	err = ValidateLoadConfigBody(body)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusBadRequest, string(err.Error()))
+		return
+	}
+
+	err = KeyValues.ConfigReader(body.Token, body.Subdomain, body.Filename)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+		return
+	}
+
+	err = KeyValues.WriteKVsToConsul(body.Token, body.Subdomain)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Configuration read and Key Values loaded to Consul.")
+	}
+}
+
+func HandleDefaultConfigLoad(w http.ResponseWriter, r *http.Request) {
+	err := KeyValues.ConfigReader("default", "", "")
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+		return
+	}
+	err = KeyValues.WriteKVsToConsul("default", "")
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Default Configuration read and default Key Values loaded to Consul.")
+	}
+}
+
+func HandleConfigGet(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	token := vars["token"]
+	filename := vars["filename"]
+	subdomain := vars["subdomain"]
+
+	if token == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "Token not passed.")
+		return
+	}
+
+	if filename == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "filename not passed.")
+		return
+	}
+
+	Directory.FetchFile(w, r, token, subdomain, filename)
+}
+
+func HandleConfigDelete(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	token := vars["token"]
+	filename := vars["filename"]
+	subdomain := vars["subdomain"]
+
+	if token == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "Token not passed.")
+		return
+	}
+
+	if filename == "" {
+		GenerateResponse(w, r, http.StatusBadRequest, "filename not passed.")
+		return
+	}
+
+	err := Directory.RemoveFile(token, subdomain, filename)
+
+	if err != nil {
+		GenerateResponse(w, r, http.StatusInternalServerError, string(err.Error()))
+	} else {
+		GenerateResponse(w, r, http.StatusOK, "Deletion of config is successful.")
+	}
+}