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-rw-r--r--lib/agent/agent.go76
-rw-r--r--lib/apiv1/apiv1.go36
-rw-r--r--lib/apiv1/config.go45
-rw-r--r--lib/apiv1/version.go24
-rw-r--r--lib/common/error.go13
-rw-r--r--lib/common/httpclient.go221
-rw-r--r--lib/session/session.go227
-rw-r--r--lib/syncthing/st.go242
-rw-r--r--lib/syncthing/stfolder.go116
-rw-r--r--lib/xdsconfig/config.go65
-rw-r--r--lib/xdsconfig/fileconfig.go120
-rw-r--r--lib/xdsserver/server.go168
12 files changed, 1353 insertions, 0 deletions
diff --git a/lib/agent/agent.go b/lib/agent/agent.go
new file mode 100644
index 0000000..80c97f7
--- /dev/null
+++ b/lib/agent/agent.go
@@ -0,0 +1,76 @@
+package agent
+
+import (
+ "fmt"
+ "os"
+ "os/exec"
+ "os/signal"
+ "syscall"
+
+ "github.com/Sirupsen/logrus"
+ "github.com/codegangsta/cli"
+ "github.com/iotbzh/xds-agent/lib/syncthing"
+ "github.com/iotbzh/xds-agent/lib/xdsconfig"
+ "github.com/iotbzh/xds-agent/lib/xdsserver"
+)
+
+// Context holds the Agent context structure
+type Context struct {
+ ProgName string
+ Config *xdsconfig.Config
+ Log *logrus.Logger
+ SThg *st.SyncThing
+ SThgCmd *exec.Cmd
+ SThgInotCmd *exec.Cmd
+ WWWServer *xdsserver.ServerService
+ Exit chan os.Signal
+}
+
+// NewAgent Create a new instance of Agent
+func NewAgent(cliCtx *cli.Context) *Context {
+ var err error
+
+ // Set logger level and formatter
+ log := cliCtx.App.Metadata["logger"].(*logrus.Logger)
+
+ logLevel := cliCtx.GlobalString("log")
+ if logLevel == "" {
+ logLevel = "error" // FIXME get from Config DefaultLogLevel
+ }
+ if log.Level, err = logrus.ParseLevel(logLevel); err != nil {
+ fmt.Printf("Invalid log level : \"%v\"\n", logLevel)
+ os.Exit(1)
+ }
+ log.Formatter = &logrus.TextFormatter{}
+
+ // Define default configuration
+ ctx := Context{
+ ProgName: cliCtx.App.Name,
+ Log: log,
+ Exit: make(chan os.Signal, 1),
+ }
+
+ // register handler on SIGTERM / exit
+ signal.Notify(ctx.Exit, os.Interrupt, syscall.SIGTERM)
+ go handlerSigTerm(&ctx)
+
+ return &ctx
+}
+
+// Handle exit and properly stop/close all stuff
+func handlerSigTerm(ctx *Context) {
+ <-ctx.Exit
+ if ctx.SThg != nil {
+ ctx.Log.Infof("Stoping Syncthing... (PID %d)",
+ ctx.SThgCmd.Process.Pid)
+ ctx.Log.Infof("Stoping Syncthing-inotify... (PID %d)",
+ ctx.SThgInotCmd.Process.Pid)
+ ctx.SThg.Stop()
+ ctx.SThg.StopInotify()
+ }
+ if ctx.WWWServer != nil {
+ ctx.Log.Infof("Stoping Web server...")
+ ctx.WWWServer.Stop()
+ }
+ os.Exit(1)
+}
diff --git a/lib/apiv1/apiv1.go b/lib/apiv1/apiv1.go
new file mode 100644
index 0000000..734929b
--- /dev/null
+++ b/lib/apiv1/apiv1.go
@@ -0,0 +1,36 @@
+package apiv1
+
+import (
+ "github.com/Sirupsen/logrus"
+ "github.com/gin-gonic/gin"
+
+ "github.com/iotbzh/xds-agent/lib/session"
+ "github.com/iotbzh/xds-agent/lib/xdsconfig"
+)
+
+// APIService .
+type APIService struct {
+ router *gin.Engine
+ apiRouter *gin.RouterGroup
+ sessions *session.Sessions
+ cfg *xdsconfig.Config
+ log *logrus.Logger
+}
+
+// New creates a new instance of API service
+func New(sess *session.Sessions, conf *xdsconfig.Config, log *logrus.Logger, r *gin.Engine) *APIService {
+ s := &APIService{
+ router: r,
+ sessions: sess,
+ apiRouter: r.Group("/api/v1"),
+ cfg: conf,
+ log: log,
+ }
+
+ s.apiRouter.GET("/version", s.getVersion)
+
+ s.apiRouter.GET("/config", s.getConfig)
+ s.apiRouter.POST("/config", s.setConfig)
+
+ return s
+}
diff --git a/lib/apiv1/config.go b/lib/apiv1/config.go
new file mode 100644
index 0000000..79225f4
--- /dev/null
+++ b/lib/apiv1/config.go
@@ -0,0 +1,45 @@
+package apiv1
+
+import (
+ "net/http"
+ "sync"
+
+ "github.com/gin-gonic/gin"
+ "github.com/iotbzh/xds-agent/lib/common"
+ "github.com/iotbzh/xds-agent/lib/xdsconfig"
+)
+
+var confMut sync.Mutex
+
+// GetConfig returns the configuration
+func (s *APIService) getConfig(c *gin.Context) {
+ confMut.Lock()
+ defer confMut.Unlock()
+
+ c.JSON(http.StatusOK, s.cfg)
+}
+
+// SetConfig sets configuration
+func (s *APIService) setConfig(c *gin.Context) {
+ // FIXME - must be tested
+ c.JSON(http.StatusNotImplemented, "Not implemented")
+
+ var cfgArg xdsconfig.Config
+
+ if c.BindJSON(&cfgArg) != nil {
+ common.APIError(c, "Invalid arguments")
+ return
+ }
+
+ confMut.Lock()
+ defer confMut.Unlock()
+
+ s.log.Debugln("SET config: ", cfgArg)
+
+ if err := s.cfg.UpdateAll(cfgArg); err != nil {
+ common.APIError(c, err.Error())
+ return
+ }
+
+ c.JSON(http.StatusOK, s.cfg)
+}
diff --git a/lib/apiv1/version.go b/lib/apiv1/version.go
new file mode 100644
index 0000000..e022441
--- /dev/null
+++ b/lib/apiv1/version.go
@@ -0,0 +1,24 @@
+package apiv1
+
+import (
+ "net/http"
+
+ "github.com/gin-gonic/gin"
+)
+
+type version struct {
+ Version string `json:"version"`
+ APIVersion string `json:"apiVersion"`
+ VersionGitTag string `json:"gitTag"`
+}
+
+// getInfo : return various information about server
+func (s *APIService) getVersion(c *gin.Context) {
+ response := version{
+ Version: s.cfg.Version,
+ APIVersion: s.cfg.APIVersion,
+ VersionGitTag: s.cfg.VersionGitTag,
+ }
+
+ c.JSON(http.StatusOK, response)
+}
diff --git a/lib/common/error.go b/lib/common/error.go
new file mode 100644
index 0000000..d03c176
--- /dev/null
+++ b/lib/common/error.go
@@ -0,0 +1,13 @@
+package common
+
+import (
+ "github.com/gin-gonic/gin"
+)
+
+// APIError returns an uniform json formatted error
+func APIError(c *gin.Context, err string) {
+ c.JSON(500, gin.H{
+ "status": "error",
+ "error": err,
+ })
+}
diff --git a/lib/common/httpclient.go b/lib/common/httpclient.go
new file mode 100644
index 0000000..40d7bc2
--- /dev/null
+++ b/lib/common/httpclient.go
@@ -0,0 +1,221 @@
+package common
+
+import (
+ "bytes"
+ "crypto/tls"
+ "encoding/json"
+ "errors"
+ "fmt"
+ "io/ioutil"
+ "net/http"
+ "strings"
+)
+
+type HTTPClient struct {
+ httpClient http.Client
+ endpoint string
+ apikey string
+ username string
+ password string
+ id string
+ csrf string
+ conf HTTPClientConfig
+}
+
+type HTTPClientConfig struct {
+ URLPrefix string
+ HeaderAPIKeyName string
+ Apikey string
+ HeaderClientKeyName string
+ CsrfDisable bool
+}
+
+// Inspired by syncthing/cmd/cli
+
+const insecure = false
+
+// HTTPNewClient creates a new HTTP client to deal with Syncthing
+func HTTPNewClient(baseURL string, cfg HTTPClientConfig) (*HTTPClient, error) {
+
+ // Create w new Http client
+ httpClient := http.Client{
+ Transport: &http.Transport{
+ TLSClientConfig: &tls.Config{
+ InsecureSkipVerify: insecure,
+ },
+ },
+ }
+ client := HTTPClient{
+ httpClient: httpClient,
+ endpoint: baseURL,
+ apikey: cfg.Apikey,
+ conf: cfg,
+ /* TODO - add user + pwd support
+ username: c.GlobalString("username"),
+ password: c.GlobalString("password"),
+ */
+ }
+
+ if client.apikey == "" {
+ if err := client.getCidAndCsrf(); err != nil {
+ return nil, err
+ }
+ }
+ return &client, nil
+}
+
+// Send request to retrieve Client id and/or CSRF token
+func (c *HTTPClient) getCidAndCsrf() error {
+ request, err := http.NewRequest("GET", c.endpoint, nil)
+ if err != nil {
+ return err
+ }
+ if _, err := c.handleRequest(request); err != nil {
+ return err
+ }
+ if c.id == "" {
+ return errors.New("Failed to get device ID")
+ }
+ if !c.conf.CsrfDisable && c.csrf == "" {
+ return errors.New("Failed to get CSRF token")
+ }
+ return nil
+}
+
+// GetClientID returns the id
+func (c *HTTPClient) GetClientID() string {
+ return c.id
+}
+
+// formatURL Build full url by concatenating all parts
+func (c *HTTPClient) formatURL(endURL string) string {
+ url := c.endpoint
+ if !strings.HasSuffix(url, "/") {
+ url += "/"
+ }
+ url += strings.TrimLeft(c.conf.URLPrefix, "/")
+ if !strings.HasSuffix(url, "/") {
+ url += "/"
+ }
+ return url + strings.TrimLeft(endURL, "/")
+}
+
+// HTTPGet Send a Get request to client and return an error object
+func (c *HTTPClient) HTTPGet(url string, data *[]byte) error {
+ _, err := c.HTTPGetWithRes(url, data)
+ return err
+}
+
+// HTTPGetWithRes Send a Get request to client and return both response and error
+func (c *HTTPClient) HTTPGetWithRes(url string, data *[]byte) (*http.Response, error) {
+ request, err := http.NewRequest("GET", c.formatURL(url), nil)
+ if err != nil {
+ return nil, err
+ }
+ res, err := c.handleRequest(request)
+ if err != nil {
+ return res, err
+ }
+ if res.StatusCode != 200 {
+ return res, errors.New(res.Status)
+ }
+
+ *data = c.responseToBArray(res)
+
+ return res, nil
+}
+
+// HTTPPost Send a POST request to client and return an error object
+func (c *HTTPClient) HTTPPost(url string, body string) error {
+ _, err := c.HTTPPostWithRes(url, body)
+ return err
+}
+
+// HTTPPostWithRes Send a POST request to client and return both response and error
+func (c *HTTPClient) HTTPPostWithRes(url string, body string) (*http.Response, error) {
+ request, err := http.NewRequest("POST", c.formatURL(url), bytes.NewBufferString(body))
+ if err != nil {
+ return nil, err
+ }
+ res, err := c.handleRequest(request)
+ if err != nil {
+ return res, err
+ }
+ if res.StatusCode != 200 {
+ return res, errors.New(res.Status)
+ }
+ return res, nil
+}
+
+func (c *HTTPClient) responseToBArray(response *http.Response) []byte {
+ defer response.Body.Close()
+ bytes, err := ioutil.ReadAll(response.Body)
+ if err != nil {
+ // TODO improved error reporting
+ fmt.Println("ERROR: " + err.Error())
+ }
+ return bytes
+}
+
+func (c *HTTPClient) handleRequest(request *http.Request) (*http.Response, error) {
+ if c.conf.HeaderAPIKeyName != "" && c.apikey != "" {
+ request.Header.Set(c.conf.HeaderAPIKeyName, c.apikey)
+ }
+ if c.conf.HeaderClientKeyName != "" && c.id != "" {
+ request.Header.Set(c.conf.HeaderClientKeyName, c.id)
+ }
+ if c.username != "" || c.password != "" {
+ request.SetBasicAuth(c.username, c.password)
+ }
+ if c.csrf != "" {
+ request.Header.Set("X-CSRF-Token-"+c.id[:5], c.csrf)
+ }
+
+ response, err := c.httpClient.Do(request)
+ if err != nil {
+ return nil, err
+ }
+
+ // Detect client ID change
+ cid := response.Header.Get(c.conf.HeaderClientKeyName)
+ if cid != "" && c.id != cid {
+ c.id = cid
+ }
+
+ // Detect CSR token change
+ for _, item := range response.Cookies() {
+ if item.Name == "CSRF-Token-"+c.id[:5] {
+ c.csrf = item.Value
+ goto csrffound
+ }
+ }
+ // OK CSRF found
+csrffound:
+
+ if response.StatusCode == 404 {
+ return nil, errors.New("Invalid endpoint or API call")
+ } else if response.StatusCode == 401 {
+ return nil, errors.New("Invalid username or password")
+ } else if response.StatusCode == 403 {
+ if c.apikey == "" {
+ // Request a new Csrf for next requests
+ c.getCidAndCsrf()
+ return nil, errors.New("Invalid CSRF token")
+ }
+ return nil, errors.New("Invalid API key")
+ } else if response.StatusCode != 200 {
+ data := make(map[string]interface{})
+ // Try to decode error field of APIError struct
+ json.Unmarshal(c.responseToBArray(response), &data)
+ if err, found := data["error"]; found {
+ return nil, fmt.Errorf(err.(string))
+ } else {
+ body := strings.TrimSpace(string(c.responseToBArray(response)))
+ if body != "" {
+ return nil, fmt.Errorf(body)
+ }
+ }
+ return nil, errors.New("Unknown HTTP status returned: " + response.Status)
+ }
+ return response, nil
+}
diff --git a/lib/session/session.go b/lib/session/session.go
new file mode 100644
index 0000000..af05daa
--- /dev/null
+++ b/lib/session/session.go
@@ -0,0 +1,227 @@
+package session
+
+import (
+ "encoding/base64"
+ "strconv"
+ "time"
+
+ "github.com/Sirupsen/logrus"
+ "github.com/gin-gonic/gin"
+ "github.com/googollee/go-socket.io"
+ uuid "github.com/satori/go.uuid"
+ "github.com/syncthing/syncthing/lib/sync"
+)
+
+const sessionCookieName = "xds-agent-sid"
+const sessionHeaderName = "XDS-AGENT-SID"
+
+const sessionMonitorTime = 10 // Time (in seconds) to schedule monitoring session tasks
+
+const initSessionMaxAge = 10 // Initial session max age in seconds
+const maxSessions = 100000 // Maximum number of sessions in sessMap map
+
+const secureCookie = false // TODO: see https://github.com/astaxie/beego/blob/master/session/session.go#L218
+
+// ClientSession contains the info of a user/client session
+type ClientSession struct {
+ ID string
+ WSID string // only one WebSocket per client/session
+ MaxAge int64
+ IOSocket *socketio.Socket
+
+ // private
+ expireAt time.Time
+ useCount int64
+}
+
+// Sessions holds client sessions
+type Sessions struct {
+ router *gin.Engine
+ cookieMaxAge int64
+ sessMap map[string]ClientSession
+ mutex sync.Mutex
+ log *logrus.Logger
+ stop chan struct{} // signals intentional stop
+}
+
+// NewClientSessions .
+func NewClientSessions(router *gin.Engine, log *logrus.Logger, cookieMaxAge string) *Sessions {
+ ckMaxAge, err := strconv.ParseInt(cookieMaxAge, 10, 0)
+ if err != nil {
+ ckMaxAge = 0
+ }
+ s := Sessions{
+ router: router,
+ cookieMaxAge: ckMaxAge,
+ sessMap: make(map[string]ClientSession),
+ mutex: sync.NewMutex(),
+ log: log,
+ stop: make(chan struct{}),
+ }
+ s.router.Use(s.Middleware())
+
+ // Start monitoring of sessions Map (use to manage expiration and cleanup)
+ go s.monitorSessMap()
+
+ return &s
+}
+
+// Stop sessions management
+func (s *Sessions) Stop() {
+ close(s.stop)
+}
+
+// Middleware is used to managed session
+func (s *Sessions) Middleware() gin.HandlerFunc {
+ return func(c *gin.Context) {
+ // FIXME Add CSRF management
+
+ // Get session
+ sess := s.Get(c)
+ if sess == nil {
+ // Allocate a new session key and put in cookie
+ sess = s.newSession("")
+ } else {
+ s.refresh(sess.ID)
+ }
+
+ // Set session in cookie and in header
+ // Do not set Domain to localhost (http://stackoverflow.com/questions/1134290/cookies-on-localhost-with-explicit-domain)
+ c.SetCookie(sessionCookieName, sess.ID, int(sess.MaxAge), "/", "",
+ secureCookie, false)
+ c.Header(sessionHeaderName, sess.ID)
+
+ // Save session id in gin metadata
+ c.Set(sessionCookieName, sess.ID)
+
+ c.Next()
+ }
+}
+
+// Get returns the client session for a specific ID
+func (s *Sessions) Get(c *gin.Context) *ClientSession {
+ var sid string
+
+ // First get from gin metadata
+ v, exist := c.Get(sessionCookieName)
+ if v != nil {
+ sid = v.(string)
+ }
+
+ // Then look in cookie
+ if !exist || sid == "" {
+ sid, _ = c.Cookie(sessionCookieName)
+ }
+
+ // Then look in Header
+ if sid == "" {
+ sid = c.Request.Header.Get(sessionCookieName)
+ }
+ if sid != "" {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ if key, ok := s.sessMap[sid]; ok {
+ // TODO: return a copy ???
+ return &key
+ }
+ }
+ return nil
+}
+
+// IOSocketGet Get socketio definition from sid
+func (s *Sessions) IOSocketGet(sid string) *socketio.Socket {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ sess, ok := s.sessMap[sid]
+ if ok {
+ return sess.IOSocket
+ }
+ return nil
+}
+
+// UpdateIOSocket updates the IO Socket definition for of a session
+func (s *Sessions) UpdateIOSocket(sid string, so *socketio.Socket) error {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ if _, ok := s.sessMap[sid]; ok {
+ sess := s.sessMap[sid]
+ if so == nil {
+ // Could be the case when socketio is closed/disconnected
+ sess.WSID = ""
+ } else {
+ sess.WSID = (*so).Id()
+ }
+ sess.IOSocket = so
+ s.sessMap[sid] = sess
+ }
+ return nil
+}
+
+// nesSession Allocate a new client session
+func (s *Sessions) newSession(prefix string) *ClientSession {
+ uuid := prefix + uuid.NewV4().String()
+ id := base64.URLEncoding.EncodeToString([]byte(uuid))
+ se := ClientSession{
+ ID: id,
+ WSID: "",
+ MaxAge: initSessionMaxAge,
+ IOSocket: nil,
+ expireAt: time.Now().Add(time.Duration(initSessionMaxAge) * time.Second),
+ useCount: 0,
+ }
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+
+ s.sessMap[se.ID] = se
+
+ s.log.Debugf("NEW session (%d): %s", len(s.sessMap), id)
+ return &se
+}
+
+// refresh Move this session ID to the head of the list
+func (s *Sessions) refresh(sid string) {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+
+ sess := s.sessMap[sid]
+ sess.useCount++
+ if sess.MaxAge < s.cookieMaxAge && sess.useCount > 1 {
+ sess.MaxAge = s.cookieMaxAge
+ sess.expireAt = time.Now().Add(time.Duration(sess.MaxAge) * time.Second)
+ }
+
+ // TODO - Add flood detection (like limit_req of nginx)
+ // (delayed request when to much requests in a short period of time)
+
+ s.sessMap[sid] = sess
+}
+
+func (s *Sessions) monitorSessMap() {
+ const dbgFullTrace = false // for debugging
+
+ for {
+ select {
+ case <-s.stop:
+ s.log.Debugln("Stop monitorSessMap")
+ return
+ case <-time.After(sessionMonitorTime * time.Second):
+ s.log.Debugf("Sessions Map size: %d", len(s.sessMap))
+ if dbgFullTrace {
+ s.log.Debugf("Sessions Map : %v", s.sessMap)
+ }
+
+ if len(s.sessMap) > maxSessions {
+ s.log.Errorln("TOO MUCH sessions, cleanup old ones !")
+ }
+
+ s.mutex.Lock()
+ for _, ss := range s.sessMap {
+ if ss.expireAt.Sub(time.Now()) < 0 {
+ s.log.Debugf("Delete expired session id: %s", ss.ID)
+ delete(s.sessMap, ss.ID)
+ }
+ }
+ s.mutex.Unlock()
+ }
+ }
+}
diff --git a/lib/syncthing/st.go b/lib/syncthing/st.go
new file mode 100644
index 0000000..e513876
--- /dev/null
+++ b/lib/syncthing/st.go
@@ -0,0 +1,242 @@
+package st
+
+import (
+ "encoding/json"
+ "io/ioutil"
+ "os"
+ "path"
+ "strings"
+ "syscall"
+ "time"
+
+ "fmt"
+
+ "os/exec"
+
+ "github.com/Sirupsen/logrus"
+ "github.com/iotbzh/xds-agent/lib/common"
+ "github.com/iotbzh/xds-agent/lib/xdsconfig"
+ "github.com/syncthing/syncthing/lib/config"
+)
+
+// SyncThing .
+type SyncThing struct {
+ BaseURL string
+ ApiKey string
+ Home string
+ STCmd *exec.Cmd
+ STICmd *exec.Cmd
+
+ // Private fields
+ binDir string
+ exitSTChan chan ExitChan
+ exitSTIChan chan ExitChan
+ client *common.HTTPClient
+ log *logrus.Logger
+}
+
+// Monitor process exit
+type ExitChan struct {
+ status int
+ err error
+}
+
+// NewSyncThing creates a new instance of Syncthing
+//func NewSyncThing(url string, apiKey string, home string, log *logrus.Logger) *SyncThing {
+func NewSyncThing(conf *xdsconfig.SyncThingConf, log *logrus.Logger) *SyncThing {
+ url := conf.GuiAddress
+ apiKey := conf.GuiAPIKey
+ home := conf.Home
+
+ s := SyncThing{
+ BaseURL: url,
+ ApiKey: apiKey,
+ Home: home,
+ binDir: conf.BinDir,
+ log: log,
+ }
+
+ if s.BaseURL == "" {
+ s.BaseURL = "http://localhost:8384"
+ }
+ if s.BaseURL[0:7] != "http://" {
+ s.BaseURL = "http://" + s.BaseURL
+ }
+
+ return &s
+}
+
+// Start Starts syncthing process
+func (s *SyncThing) startProc(exeName string, args []string, env []string, eChan *chan ExitChan) (*exec.Cmd, error) {
+
+ // Kill existing process (useful for debug ;-) )
+ if os.Getenv("DEBUG_MODE") != "" {
+ exec.Command("bash", "-c", "pkill -9 "+exeName).Output()
+ }
+
+ path, err := exec.LookPath(path.Join(s.binDir, exeName))
+ if err != nil {
+ return nil, fmt.Errorf("Cannot find %s executable in %s", exeName, s.binDir)
+ }
+ cmd := exec.Command(path, args...)
+ cmd.Env = os.Environ()
+ for _, ev := range env {
+ cmd.Env = append(cmd.Env, ev)
+ }
+
+ err = cmd.Start()
+ if err != nil {
+ return nil, err
+ }
+
+ *eChan = make(chan ExitChan, 1)
+ go func(c *exec.Cmd) {
+ status := 0
+ cmdOut, err := c.StdoutPipe()
+ if err == nil {
+ s.log.Errorf("Pipe stdout error for : %s", err)
+ } else if cmdOut != nil {
+ stdOutput, _ := ioutil.ReadAll(cmdOut)
+ fmt.Printf("STDOUT: %s\n", stdOutput)
+ }
+ sts, err := c.Process.Wait()
+ if !sts.Success() {
+ s := sts.Sys().(syscall.WaitStatus)
+ status = s.ExitStatus()
+ }
+ *eChan <- ExitChan{status, err}
+ }(cmd)
+
+ return cmd, nil
+}
+
+// Start Starts syncthing process
+func (s *SyncThing) Start() (*exec.Cmd, error) {
+ var err error
+ args := []string{
+ "--home=" + s.Home,
+ "-no-browser",
+ "--gui-address=" + s.BaseURL,
+ }
+
+ if s.ApiKey != "" {
+ args = append(args, "-gui-apikey=\""+s.ApiKey+"\"")
+ }
+ if s.log.Level == logrus.DebugLevel {
+ args = append(args, "-verbose")
+ }
+
+ env := []string{
+ "STNODEFAULTFOLDER=1",
+ }
+
+ s.STCmd, err = s.startProc("syncthing", args, env, &s.exitSTChan)
+
+ return s.STCmd, err
+}
+
+// StartInotify Starts syncthing-inotify process
+func (s *SyncThing) StartInotify() (*exec.Cmd, error) {
+ var err error
+
+ args := []string{
+ "--home=" + s.Home,
+ "-target=" + s.BaseURL,
+ }
+ if s.log.Level == logrus.DebugLevel {
+ args = append(args, "-verbosity=4")
+ }
+
+ env := []string{}
+
+ s.STICmd, err = s.startProc("syncthing-inotify", args, env, &s.exitSTIChan)
+
+ return s.STICmd, err
+}
+
+func (s *SyncThing) stopProc(pname string, proc *os.Process, exit chan ExitChan) {
+ if err := proc.Signal(os.Interrupt); err != nil {
+ s.log.Errorf("Proc interrupt %s error: %s", pname, err.Error())
+
+ select {
+ case <-exit:
+ case <-time.After(time.Second):
+ // A bigger bonk on the head.
+ if err := proc.Signal(os.Kill); err != nil {
+ s.log.Errorf("Proc term %s error: %s", pname, err.Error())
+ }
+ <-exit
+ }
+ }
+ s.log.Infof("%s stopped (PID %d)", pname, proc.Pid)
+}
+
+// Stop Stops syncthing process
+func (s *SyncThing) Stop() {
+ if s.STCmd == nil {
+ return
+ }
+ s.stopProc("syncthing", s.STCmd.Process, s.exitSTChan)
+ s.STCmd = nil
+}
+
+// StopInotify Stops syncthing process
+func (s *SyncThing) StopInotify() {
+ if s.STICmd == nil {
+ return
+ }
+ s.stopProc("syncthing-inotify", s.STICmd.Process, s.exitSTIChan)
+ s.STICmd = nil
+}
+
+// Connect Establish HTTP connection with Syncthing
+func (s *SyncThing) Connect() error {
+ var err error
+ s.client, err = common.HTTPNewClient(s.BaseURL,
+ common.HTTPClientConfig{
+ URLPrefix: "/rest",
+ HeaderClientKeyName: "X-Syncthing-ID",
+ })
+ if err != nil {
+ msg := ": " + err.Error()
+ if strings.Contains(err.Error(), "connection refused") {
+ msg = fmt.Sprintf("(url: %s)", s.BaseURL)
+ }
+ return fmt.Errorf("ERROR: cannot connect to Syncthing %s", msg)
+ }
+ if s.client == nil {
+ return fmt.Errorf("ERROR: cannot connect to Syncthing (null client)")
+ }
+ return nil
+}
+
+// IDGet returns the Syncthing ID of Syncthing instance running locally
+func (s *SyncThing) IDGet() (string, error) {
+ var data []byte
+ if err := s.client.HTTPGet("system/status", &data); err != nil {
+ return "", err
+ }
+ status := make(map[string]interface{})
+ json.Unmarshal(data, &status)
+ return status["myID"].(string), nil
+}
+
+// ConfigGet returns the current Syncthing configuration
+func (s *SyncThing) ConfigGet() (config.Configuration, error) {
+ var data []byte
+ config := config.Configuration{}
+ if err := s.client.HTTPGet("system/config", &data); err != nil {
+ return config, err
+ }
+ err := json.Unmarshal(data, &config)
+ return config, err
+}
+
+// ConfigSet set Syncthing configuration
+func (s *SyncThing) ConfigSet(cfg config.Configuration) error {
+ body, err := json.Marshal(cfg)
+ if err != nil {
+ return err
+ }
+ return s.client.HTTPPost("system/config", string(body))
+}
diff --git a/lib/syncthing/stfolder.go b/lib/syncthing/stfolder.go
new file mode 100644
index 0000000..d79e579
--- /dev/null
+++ b/lib/syncthing/stfolder.go
@@ -0,0 +1,116 @@
+package st
+
+import (
+ "path/filepath"
+ "strings"
+
+ "github.com/syncthing/syncthing/lib/config"
+ "github.com/syncthing/syncthing/lib/protocol"
+)
+
+// FIXME remove and use an interface on xdsconfig.FolderConfig
+type FolderChangeArg struct {
+ ID string
+ Label string
+ RelativePath string
+ SyncThingID string
+ ShareRootDir string
+}
+
+// FolderChange is called when configuration has changed
+func (s *SyncThing) FolderChange(f FolderChangeArg) error {
+
+ // Get current config
+ stCfg, err := s.ConfigGet()
+ if err != nil {
+ s.log.Errorln(err)
+ return err
+ }
+
+ // Add new Device if needed
+ var devID protocol.DeviceID
+ if err := devID.UnmarshalText([]byte(f.SyncThingID)); err != nil {
+ s.log.Errorf("not a valid device id (err %v)\n", err)
+ return err
+ }
+
+ newDevice := config.DeviceConfiguration{
+ DeviceID: devID,
+ Name: f.SyncThingID,
+ Addresses: []string{"dynamic"},
+ }
+
+ var found = false
+ for _, device := range stCfg.Devices {
+ if device.DeviceID == devID {
+ found = true
+ break
+ }
+ }
+ if !found {
+ stCfg.Devices = append(stCfg.Devices, newDevice)
+ }
+
+ // Add or update Folder settings
+ var label, id string
+ if label = f.Label; label == "" {
+ label = strings.Split(id, "/")[0]
+ }
+ if id = f.ID; id == "" {
+ id = f.SyncThingID[0:15] + "_" + label
+ }
+
+ folder := config.FolderConfiguration{
+ ID: id,
+ Label: label,
+ RawPath: filepath.Join(f.ShareRootDir, f.RelativePath),
+ }
+
+ folder.Devices = append(folder.Devices, config.FolderDeviceConfiguration{
+ DeviceID: newDevice.DeviceID,
+ })
+
+ found = false
+ var fld config.FolderConfiguration
+ for _, fld = range stCfg.Folders {
+ if folder.ID == fld.ID {
+ fld = folder
+ found = true
+ break
+ }
+ }
+ if !found {
+ stCfg.Folders = append(stCfg.Folders, folder)
+ fld = stCfg.Folders[0]
+ }
+
+ err = s.ConfigSet(stCfg)
+ if err != nil {
+ s.log.Errorln(err)
+ }
+
+ return nil
+}
+
+// FolderDelete is called to delete a folder config
+func (s *SyncThing) FolderDelete(id string) error {
+ // Get current config
+ stCfg, err := s.ConfigGet()
+ if err != nil {
+ s.log.Errorln(err)
+ return err
+ }
+
+ for i, fld := range stCfg.Folders {
+ if id == fld.ID {
+ stCfg.Folders = append(stCfg.Folders[:i], stCfg.Folders[i+1:]...)
+ err = s.ConfigSet(stCfg)
+ if err != nil {
+ s.log.Errorln(err)
+ return err
+ }
+ }
+ }
+
+ return nil
+}
diff --git a/lib/xdsconfig/config.go b/lib/xdsconfig/config.go
new file mode 100644
index 0000000..1f53cbd
--- /dev/null
+++ b/lib/xdsconfig/config.go
@@ -0,0 +1,65 @@
+package xdsconfig
+
+import (
+ "fmt"
+
+ "os"
+
+ "github.com/Sirupsen/logrus"
+ "github.com/codegangsta/cli"
+)
+
+// Config parameters (json format) of /config command
+type Config struct {
+ Version string `json:"version"`
+ APIVersion string `json:"apiVersion"`
+ VersionGitTag string `json:"gitTag"`
+
+ // Private / un-exported fields
+ HTTPPort string `json:"-"`
+ FileConf *FileConfig
+ log *logrus.Logger
+}
+
+// Config default values
+const (
+ DefaultAPIVersion = "1"
+ DefaultPort = "8010"
+ DefaultLogLevel = "error"
+)
+
+// Init loads the configuration on start-up
+func Init(ctx *cli.Context, log *logrus.Logger) (Config, error) {
+ var err error
+
+ // Define default configuration
+ c := Config{
+ Version: ctx.App.Metadata["version"].(string),
+ APIVersion: DefaultAPIVersion,
+ VersionGitTag: ctx.App.Metadata["git-tag"].(string),
+
+ HTTPPort: DefaultPort,
+ log: log,
+ }
+
+ // config file settings overwrite default config
+ c.FileConf, err = updateConfigFromFile(&c, ctx.GlobalString("config"))
+ if err != nil {
+ return Config{}, err
+ }
+
+ return c, nil
+}
+
+// UpdateAll Update the current configuration
+func (c *Config) UpdateAll(newCfg Config) error {
+ return fmt.Errorf("Not Supported")
+}
+
+func dirExists(path string) bool {
+ _, err := os.Stat(path)
+ if os.IsNotExist(err) {
+ return false
+ }
+ return true
+}
diff --git a/lib/xdsconfig/fileconfig.go b/lib/xdsconfig/fileconfig.go
new file mode 100644
index 0000000..0c4828c
--- /dev/null
+++ b/lib/xdsconfig/fileconfig.go
@@ -0,0 +1,120 @@
+package xdsconfig
+
+import (
+ "encoding/json"
+ "fmt"
+ "os"
+ "os/user"
+ "path"
+ "path/filepath"
+ "regexp"
+)
+
+type SyncThingConf struct {
+ BinDir string `json:"binDir"`
+ Home string `json:"home"`
+ GuiAddress string `json:"gui-address"`
+ GuiAPIKey string `json:"gui-apikey"`
+}
+
+type FileConfig struct {
+ HTTPPort string `json:"httpPort"`
+ SThgConf *SyncThingConf `json:"syncthing"`
+}
+
+// getConfigFromFile reads configuration from a config file.
+// Order to determine which config file is used:
+// 1/ from command line option: "--config myConfig.json"
+// 2/ $HOME/.xds/agent-config.json file
+// 3/ <current_dir>/agent-config.json file
+// 4/ <executable dir>/agent-config.json file
+
+func updateConfigFromFile(c *Config, confFile string) (*FileConfig, error) {
+
+ searchIn := make([]string, 0, 3)
+ if confFile != "" {
+ searchIn = append(searchIn, confFile)
+ }
+ if usr, err := user.Current(); err == nil {
+ searchIn = append(searchIn, path.Join(usr.HomeDir, ".xds", "agent-config.json"))
+ }
+ cwd, err := os.Getwd()
+ if err == nil {
+ searchIn = append(searchIn, path.Join(cwd, "agent-config.json"))
+ }
+ exePath, err := filepath.Abs(filepath.Dir(os.Args[0]))
+ if err == nil {
+ searchIn = append(searchIn, path.Join(exePath, "agent-config.json"))
+ }
+
+ var cFile *string
+ for _, p := range searchIn {
+ if _, err := os.Stat(p); err == nil {
+ cFile = &p
+ break
+ }
+ }
+ fCfg := FileConfig{}
+ if cFile == nil {
+ // No config file found
+ return &fCfg, nil
+ }
+
+ c.log.Infof("Use config file: %s", *cFile)
+
+ // TODO move on viper package to support comments in JSON and also
+ // bind with flags (command line options)
+ // see https://github.com/spf13/viper#working-with-flags
+
+ fd, _ := os.Open(*cFile)
+ defer fd.Close()
+ if err := json.NewDecoder(fd).Decode(&fCfg); err != nil {
+ return nil, err
+ }
+
+ // Support environment variables (IOW ${MY_ENV_VAR} syntax) in agent-config.json
+ // TODO: better to use reflect package to iterate on fields and be more generic
+ var rep string
+
+ if rep, err = resolveEnvVar(fCfg.SThgConf.BinDir); err != nil {
+ return nil, err
+ }
+ fCfg.SThgConf.BinDir = path.Clean(rep)
+
+ if rep, err = resolveEnvVar(fCfg.SThgConf.Home); err != nil {
+ return nil, err
+ }
+ fCfg.SThgConf.Home = path.Clean(rep)
+
+ return &fCfg, nil
+}
+
+// resolveEnvVar Resolved environment variable regarding the syntax ${MYVAR}
+func resolveEnvVar(s string) (string, error) {
+ re := regexp.MustCompile("\\${(.*)}")
+ vars := re.FindAllStringSubmatch(s, -1)
+ res := s
+ for _, v := range vars {
+ val := os.Getenv(v[1])
+ if val == "" {
+ return res, fmt.Errorf("ERROR: %s env variable not defined", v[1])
+ }
+
+ rer := regexp.MustCompile("\\${" + v[1] + "}")
+ res = rer.ReplaceAllString(res, val)
+ }
+
+ return res, nil
+}
+
+// exists returns whether the given file or directory exists or not
+func exists(path string) bool {
+ _, err := os.Stat(path)
+ if err == nil {
+ return true
+ }
+ if os.IsNotExist(err) {
+ return false
+ }
+ return true
+}
diff --git a/lib/xdsserver/server.go b/lib/xdsserver/server.go
new file mode 100644
index 0000000..f0777e3
--- /dev/null
+++ b/lib/xdsserver/server.go
@@ -0,0 +1,168 @@
+package xdsserver
+
+import (
+ "net/http"
+
+ "github.com/Sirupsen/logrus"
+ "github.com/gin-gonic/gin"
+ "github.com/googollee/go-socket.io"
+ "github.com/iotbzh/xds-agent/lib/apiv1"
+ "github.com/iotbzh/xds-agent/lib/session"
+ "github.com/iotbzh/xds-agent/lib/xdsconfig"
+)
+
+// ServerService .
+type ServerService struct {
+ router *gin.Engine
+ api *apiv1.APIService
+ sIOServer *socketio.Server
+ webApp *gin.RouterGroup
+ cfg *xdsconfig.Config
+ sessions *session.Sessions
+ log *logrus.Logger
+ stop chan struct{} // signals intentional stop
+}
+
+const indexFilename = "index.html"
+const cookieMaxAge = "3600"
+
+// NewServer creates an instance of ServerService
+func NewServer(conf *xdsconfig.Config, log *logrus.Logger) *ServerService {
+
+ // Setup logging for gin router
+ if log.Level == logrus.DebugLevel {
+ gin.SetMode(gin.DebugMode)
+ } else {
+ gin.SetMode(gin.ReleaseMode)
+ }
+
+ // TODO
+ // - try to bind gin DefaultWriter & DefaultErrorWriter to logrus logger
+ // - try to fix pb about isTerminal=false when out is in VSC Debug Console
+ //gin.DefaultWriter = ??
+ //gin.DefaultErrorWriter = ??
+
+ // Creates gin router
+ r := gin.New()
+
+ svr := &ServerService{
+ router: r,
+ api: nil,
+ sIOServer: nil,
+ webApp: nil,
+ cfg: conf,
+ log: log,
+ sessions: nil,
+ stop: make(chan struct{}),
+ }
+
+ return svr
+}
+
+// Serve starts a new instance of the Web Server
+func (s *ServerService) Serve() error {
+ var err error
+
+ // Setup middlewares
+ s.router.Use(gin.Logger())
+ s.router.Use(gin.Recovery())
+ s.router.Use(s.middlewareXDSDetails())
+ s.router.Use(s.middlewareCORS())
+
+ // Sessions manager
+ s.sessions = session.NewClientSessions(s.router, s.log, cookieMaxAge)
+
+ // Create REST API
+ s.api = apiv1.New(s.sessions, s.cfg, s.log, s.router)
+
+ // Websocket routes
+ s.sIOServer, err = socketio.NewServer(nil)
+ if err != nil {
+ s.log.Fatalln(err)
+ }
+
+ s.router.GET("/socket.io/", s.socketHandler)
+ s.router.POST("/socket.io/", s.socketHandler)
+ /* TODO: do we want to support ws://... ?
+ s.router.Handle("WS", "/socket.io/", s.socketHandler)
+ s.router.Handle("WSS", "/socket.io/", s.socketHandler)
+ */
+
+ // Serve in the background
+ serveError := make(chan error, 1)
+ go func() {
+ serveError <- http.ListenAndServe(":"+s.cfg.HTTPPort, s.router)
+ }()
+
+ // Wait for stop, restart or error signals
+ select {
+ case <-s.stop:
+ // Shutting down permanently
+ s.sessions.Stop()
+ s.log.Infoln("shutting down (stop)")
+ case err = <-serveError:
+ // Error due to listen/serve failure
+ s.log.Errorln(err)
+ }
+
+ return nil
+}
+
+// Stop web server
+func (s *ServerService) Stop() {
+ close(s.stop)
+}
+
+// Add details in Header
+func (s *ServerService) middlewareXDSDetails() gin.HandlerFunc {
+ return func(c *gin.Context) {
+ c.Header("XDS-Agent-Version", s.cfg.Version)
+ c.Header("XDS-API-Version", s.cfg.APIVersion)
+ c.Next()
+ }
+}
+
+// CORS middleware
+func (s *ServerService) middlewareCORS() gin.HandlerFunc {
+ return func(c *gin.Context) {
+
+ if c.Request.Method == "OPTIONS" {
+ c.Header("Access-Control-Allow-Origin", "*")
+ c.Header("Access-Control-Allow-Headers", "Content-Type")
+ c.Header("Access-Control-Allow-Methods", "POST, DELETE, GET, PUT")
+ c.Header("Content-Type", "application/json")
+ c.Header("Access-Control-Max-Age", cookieMaxAge)
+ c.AbortWithStatus(204)
+ return
+ }
+
+ c.Next()
+ }
+}
+
+// socketHandler is the handler for the "main" websocket connection
+func (s *ServerService) socketHandler(c *gin.Context) {
+
+ // Retrieve user session
+ sess := s.sessions.Get(c)
+ if sess == nil {
+ c.JSON(500, gin.H{"error": "Cannot retrieve session"})
+ return
+ }
+
+ s.sIOServer.On("connection", func(so socketio.Socket) {
+ s.log.Debugf("WS Connected (SID=%v)", so.Id())
+ s.sessions.UpdateIOSocket(sess.ID, &so)
+
+ so.On("disconnection", func() {
+ s.log.Debugf("WS disconnected (SID=%v)", so.Id())
+ s.sessions.UpdateIOSocket(sess.ID, nil)
+ })
+ })
+
+ s.sIOServer.On("error", func(so socketio.Socket, err error) {
+ s.log.Errorf("WS SID=%v Error : %v", so.Id(), err.Error())
+ })
+
+ s.sIOServer.ServeHTTP(c.Writer, c.Request)
+}