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/*
* Copyright (C) 2017 "IoT.bzh"
* Author Sebastien Douheret <sebastien@iot.bzh>
*
* 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 xdsserver
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
common "github.com/iotbzh/xds-common/golib"
"github.com/iotbzh/xds-server/lib/xsapiv1"
uuid "github.com/satori/go.uuid"
)
// IFOLDER interface implementation for native/path mapping folders
// PathMap .
type PathMap struct {
*Context
config xsapiv1.FolderConfig
}
// NewFolderPathMap Create a new instance of PathMap
func NewFolderPathMap(ctx *Context) *PathMap {
f := PathMap{
Context: ctx,
config: xsapiv1.FolderConfig{
Status: xsapiv1.StatusDisable,
},
}
return &f
}
// NewUID Get a UUID
func (f *PathMap) NewUID(suffix string) string {
uuid := uuid.NewV1().String()
if len(suffix) > 0 {
uuid += "_" + suffix
}
return uuid
}
// Add a new folder
func (f *PathMap) Add(cfg xsapiv1.FolderConfig) (*xsapiv1.FolderConfig, error) {
if cfg.DataPathMap.ServerPath == "" {
return nil, fmt.Errorf("ServerPath must be set")
}
// Use shareRootDir if ServerPath is a relative path
dir := cfg.DataPathMap.ServerPath
if !filepath.IsAbs(dir) {
dir = filepath.Join(f.Config.FileConf.ShareRootDir, dir)
}
// Sanity check
if !common.Exists(dir) {
// try to create if not existing
if err := os.MkdirAll(dir, 0755); err != nil {
return nil, fmt.Errorf("Cannot create ServerPath directory: %s", dir)
}
}
if !common.Exists(dir) {
return nil, fmt.Errorf("ServerPath directory is not accessible: %s", dir)
}
f.config = cfg
f.config.RootPath = dir
f.config.DataPathMap.ServerPath = dir
f.config.IsInSync = true
// Verify file created by XDS agent when needed
if cfg.DataPathMap.CheckFile != "" {
errMsg := "ServerPath sanity check error (%d): %v"
ckFile := f.ConvPathCli2Svr(cfg.DataPathMap.CheckFile)
if !common.Exists(ckFile) {
return nil, fmt.Errorf(errMsg, 1, "file not present")
}
if cfg.DataPathMap.CheckContent != "" {
fd, err := os.OpenFile(ckFile, os.O_APPEND|os.O_RDWR, 0600)
if err != nil {
return nil, fmt.Errorf(errMsg, 2, err)
}
defer fd.Close()
// Check specific message written by agent
content, err := ioutil.ReadAll(fd)
if err != nil {
return nil, fmt.Errorf(errMsg, 3, err)
}
if string(content) != cfg.DataPathMap.CheckContent {
return nil, fmt.Errorf(errMsg, 4, "file content differ")
}
// Write a specific message that will be check back on agent side
msg := "Pathmap checked message written by xds-server ID: " + f.Config.ServerUID + "\n"
if n, err := fd.WriteString(msg); n != len(msg) || err != nil {
return nil, fmt.Errorf(errMsg, 5, err)
}
}
}
f.config.Status = xsapiv1.StatusEnable
return &f.config, nil
}
// GetConfig Get public part of folder config
func (f *PathMap) GetConfig() xsapiv1.FolderConfig {
return f.config
}
// GetFullPath returns the full path of a directory (from server POV)
func (f *PathMap) GetFullPath(dir string) string {
if &dir == nil {
return f.config.DataPathMap.ServerPath
}
return filepath.Join(f.config.DataPathMap.ServerPath, dir)
}
// ConvPathCli2Svr Convert path from Client to Server
func (f *PathMap) ConvPathCli2Svr(s string) string {
if f.config.ClientPath != "" && f.config.DataPathMap.ServerPath != "" {
return strings.Replace(s,
f.config.ClientPath,
f.config.DataPathMap.ServerPath,
-1)
}
return s
}
// ConvPathSvr2Cli Convert path from Server to Client
func (f *PathMap) ConvPathSvr2Cli(s string) string {
if f.config.ClientPath != "" && f.config.DataPathMap.ServerPath != "" {
return strings.Replace(s,
f.config.DataPathMap.ServerPath,
f.config.ClientPath,
-1)
}
return s
}
// Remove a folder
func (f *PathMap) Remove() error {
// nothing to do
return nil
}
// Update update some fields of a folder
func (f *PathMap) Update(cfg xsapiv1.FolderConfig) (*xsapiv1.FolderConfig, error) {
if f.config.ID != cfg.ID {
return nil, fmt.Errorf("Invalid id")
}
f.config = cfg
return &f.config, nil
}
// RegisterEventChange requests registration for folder change event
func (f *PathMap) RegisterEventChange(cb *FolderEventCB, data *FolderEventCBData) error {
return nil
}
// UnRegisterEventChange remove registered callback
func (f *PathMap) UnRegisterEventChange() error {
return nil
}
// Sync Force folder files synchronization
func (f *PathMap) Sync() error {
return nil
}
// IsInSync Check if folder files are in-sync
func (f *PathMap) IsInSync() (bool, error) {
return true, nil
}
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