/
appserver.go
297 lines (260 loc) · 6.97 KB
/
appserver.go
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package appserver
import (
"errors"
"fmt"
//"github.com/eaciit/config"
//"github.com/eaciit/errorlib"
"net"
"net/rpc"
"reflect"
"strings"
"github.com/eaciit/toolkit"
)
const (
packageName = "eaciit"
objServer = "Server"
)
type IServer interface {
Start() error
Stop() error
ReadConfig() error
}
type Server struct {
ServerId string
ConfigFile string
//ServerName string
//Port int
Address string
Role string
UseGlobalPassword bool
AllowMultiLogin bool
rpcObject *Rpc
Log *toolkit.LogEngine
rpcServer *rpc.Server
listener net.Listener
container interface{}
users map[string]*User
sessions map[string]*Session
secret string
}
func (a *Server) SetContainer(o interface{}) {
a.container = o
}
func (a *Server) Container() interface{} {
return a.container
}
func (a *Server) SetSecret(s string) {
a.secret = s
}
func (a *Server) Secret() string {
if a.secret == "" {
a.secret = toolkit.GenerateRandomString("", 32)
}
return a.secret
}
func (a *Server) validateSecret(secretType string, referenceID string, secret string) bool {
secretType = strings.ToLower(secretType)
//referenceID = referenceID
if secretType == "" || secretType == "self" {
user, userExist := a.users[referenceID]
if userExist == false {
return false
} else if a.UseGlobalPassword == true {
return secret == a.Secret()
} else {
return secret == user.Secret
}
} else if secretType == "session" {
//a.Log.Info(fmt.Sprintf("Session Validation: ID=%s Secret=%s\n%s", referenceID, secret, toolkit.JsonString(a.sessions)))
session, exist := a.sessions[referenceID]
if !exist {
a.Log.Warning("Session " + referenceID + " could not be found on " + a.Address)
return false
}
//if session.ReferenceID != referenceID {
// return false
//}
if session.IsValid() == false {
//a.Log.Warning("Session "+referenceID+" is not valid")
return false
}
return session.Secret == secret
}
return false
}
func (a *Server) Start(address string) error {
if a.Log == nil {
le, e := toolkit.NewLog(true, false, "", "", "")
if e == nil {
a.Log = le
} else {
return errors.New("Unable to setup log")
}
}
if a.rpcObject == nil {
//return errorlib.Error(packageName, objServer, "Start", "RPC Object is not yet properly initialized")
a.rpcObject = new(Rpc)
}
/*
if reloadConfig {
a.ReadConfig()
}
*/
if a.Address == "" {
if address != "" {
a.Address = address
}
/*else {
a.Address = fmt.Sprintf("%s:%d", a.ServerName, a.Port)
}
*/
if a.Address == "" {
return errors.New("RPC Server address is empty")
}
}
//init a ping method. Ping method will return "EACIIT RPC Application Server"
a.AddFn("ping", func(in toolkit.M) *toolkit.Result {
result := toolkit.NewResult()
//result.Data = "EACIIT RPC Application Server"
return result
}, false, "")
a.AddFn("addsession", func(in toolkit.M) *toolkit.Result {
referenceID := in.GetString("auth_referenceid")
result := toolkit.NewResult()
if referenceID == "" {
return result.SetErrorTxt("Empty user provided")
}
//session, exist := a.sessions[referenceID]
var session *Session
for _, session = range a.sessions {
if session.ReferenceID == referenceID && session.IsValid() && !a.AllowMultiLogin {
return result.SetErrorTxt(referenceID + " already has active session on other connection")
} else if session.ReferenceID == referenceID && !session.IsValid() && !a.AllowMultiLogin {
delete(a.sessions, session.SessionID)
}
}
session = a.RegisterSession(referenceID)
//a.sessions[session.SessionID] = session
//result.SetBytes(session, MarshallingMethod())
result.Data = toolkit.M{}.Set("referenceid", session.SessionID).Set("secret", session.Secret).ToBytes("gob")
a.Log.Info(a.Address + " has new session " + referenceID + " : " + session.SessionID)
return result
}, true, "")
a.AddFn("removesession", func(in toolkit.M) *toolkit.Result {
result := toolkit.NewResult()
referenceID := in.GetString("auth_referenceid")
delete(a.sessions, referenceID)
return result
}, true, "session")
a.Log.Info("Starting server " + a.Address + ". Registered functions are: " + strings.Join(func() []string {
ret := []string{}
for k, _ := range a.rpcObject.Fns {
ret = append(ret, k)
}
return ret
}(), ", "))
a.rpcServer = rpc.NewServer()
a.rpcServer.Register(a.rpcObject)
l, e := net.Listen("tcp", fmt.Sprintf("%s", a.Address))
if e != nil {
return e
}
a.sessions = map[string]*Session{}
a.listener = l
go func() {
a.rpcServer.Accept(l)
//rpc.Accept(l)
/*
listenerConnection, err := l.Accept()
if err != nil {
a.Log.Error("Unable to setup RPC Listener Connection " + err.Error())
return
}
go a.rpcServer.ServeConn(listenerConnection)
*/
}()
return nil
}
func (a *Server) RegisterSession(referenceID string) *Session {
s := NewSession(referenceID)
s.Secret = toolkit.RandomString(32)
s.SessionID = toolkit.RandomString(32)
s.ReferenceID = referenceID
a.sessions[s.SessionID] = s
//a.Log.Info(fmt.Sprintf("Registering new session [%s] for %s", s.SessionID, s.ReferenceID))
return s
}
func (a *Server) AddUser(userid, password string) {
user := new(User)
user.ReferenceID = userid
user.Secret = password
if a.users == nil {
a.users = map[string]*User{}
}
a.users[user.ReferenceID] = user
}
func (a *Server) AddFn(methodname string, fn RpcFn, needAuth bool, authType string) {
var r *Rpc
if a.rpcObject == nil {
//toolkit.Println("Initiliazed new RPC object for " + a.Address)
r = new(Rpc)
} else {
r = a.rpcObject
}
AddFntoRpc(r, a, methodname, fn, needAuth, authType)
a.rpcObject = r
}
func (a *Server) Functions() RpcFns {
if a.rpcObject == nil {
return RpcFns{}
}
return a.rpcObject.Fns
}
func (a *Server) Fn(fnName string) *RpcFnInfo {
if a.rpcObject == nil {
return nil
}
fnName = strings.ToLower(fnName)
fn, exist := a.rpcObject.Fns[fnName]
if !exist {
return nil
}
return fn
}
func (a *Server) RegisterRPCFunctions(o interface{}) error {
t := reflect.TypeOf(o)
v := reflect.ValueOf(o)
if v.Kind() != reflect.Ptr {
return errors.New("Invalid object for RPC Register")
}
if a.Log == nil {
a.Log, _ = toolkit.NewLog(true, false, "", "", "")
}
//objName := toolkit.TypeName(o)
methodCount := t.NumMethod()
for i := 0; i < methodCount; i++ {
method := t.Method(i)
mtype := method.Type
methodName := strings.ToLower(method.Name)
//fmt.Println("Evaluating " + toolkit.TypeName(o) + "." + methodName)
//-- now check method signature
if mtype.NumIn() == 2 && mtype.In(1).String() == "toolkit.M" {
if mtype.NumOut() == 1 && mtype.Out(0).String() == "*toolkit.Result" {
//a.Log.Info("Registering RPC Function " + objName + "." + methodName)
a.AddFn(methodName, v.Method(i).Interface().(func(toolkit.M) *toolkit.Result), true, "session")
}
}
}
return nil
}
/*
func (a *Server) Serve() error {
rpc.Accept(a.listener)
return nil
}
*/
func (a *Server) Stop() error {
a.listener.Close()
a.Log.Info(a.Address + " Stopping service")
return nil
}