From 3822025a7a4103f2c2de70f0c9199bc9a64cc3b4 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Wed, 23 Dec 2015 01:30:03 +0100
Subject: session now has a timeout


diff --git a/session.go b/session.go
index bce1072..88648f7 100644
--- a/session.go
+++ b/session.go
@@ -27,6 +27,7 @@ package rhimport
 import (
 	"fmt"
 	"net/http"
+	"time"
 )
 
 const (
@@ -34,10 +35,11 @@ const (
 	SESSION_RUNNING
 	SESSION_CANCELED
 	SESSION_DONE
+	SESSION_TIMEOUT
 )
 
 type SessionChan struct {
-	runChan         chan<- bool
+	runChan         chan<- time.Duration
 	cancelChan      chan<- bool
 	addProgressChan chan<- sessionAddProgressHandlerRequest
 	addDoneChan     chan<- sessionAddDoneHandlerRequest
@@ -49,10 +51,11 @@ type Session struct {
 	removeFunc      func()
 	done            chan bool
 	quit            chan bool
+	timer           *time.Timer
 	cancelIntChan   chan bool
 	progressIntChan chan ProgressData
 	doneIntChan     chan ImportResult
-	runChan         chan bool
+	runChan         chan time.Duration
 	cancelChan      chan bool
 	addProgressChan chan sessionAddProgressHandlerRequest
 	addDoneChan     chan sessionAddDoneHandlerRequest
@@ -125,18 +128,19 @@ func session_import_run(ctx ImportContext, done chan<- ImportResult) {
 	}
 }
 
-func (self *Session) run() {
+func (self *Session) run(timeout time.Duration) {
 	self.ctx.ProgressCallBack = session_progress_callback
 	self.ctx.ProgressCallBackData = (chan<- ProgressData)(self.progressIntChan)
 	self.ctx.Cancel = self.cancelIntChan
 	go session_import_run(self.ctx, self.doneIntChan)
 	self.state = SESSION_RUNNING
+	self.timer.Reset(timeout)
 	return
 }
 
-func (self *SessionChan) Run() {
+func (self *SessionChan) Run(timeout time.Duration) {
 	select {
-	case self.runChan <- true:
+	case self.runChan <- timeout:
 	default: // command is already pending or session is about to be closed/removed
 	}
 }
@@ -182,7 +186,7 @@ func (self *SessionChan) AddProgressHandler(userdata interface{}, cb ImportProgr
 }
 
 func (self *Session) addDoneHandler(userdata interface{}, cb func(ImportResult, interface{}) bool) (resp sessionAddDoneHandlerResponse) {
-	if self.state == SESSION_NEW && self.state != SESSION_RUNNING {
+	if self.state != SESSION_NEW && self.state != SESSION_RUNNING {
 		resp.err = fmt.Errorf("session is already done/canceled")
 	}
 	self.doneCBs = append(self.doneCBs, &SessionDoneCB{cb, userdata})
@@ -234,9 +238,19 @@ func (self *Session) dispatchRequests() {
 				self.cancel()
 			}
 			return
-		case <-self.runChan:
+		case <-self.timer.C:
+			if self.state == SESSION_RUNNING {
+				self.cancel()
+			}
+			self.state = SESSION_TIMEOUT
+			r := &ImportResult{500, "timeout", 0, 0}
+			self.callDoneHandler(r)
+			if self.removeFunc != nil {
+				self.removeFunc()
+			}
+		case t := <-self.runChan:
 			if self.state == SESSION_NEW {
-				self.run()
+				self.run(t)
 			}
 		case <-self.cancelChan:
 			if self.state == SESSION_RUNNING {
@@ -249,10 +263,13 @@ func (self *Session) dispatchRequests() {
 		case p := <-self.progressIntChan:
 			self.callProgressHandler(&p)
 		case r := <-self.doneIntChan:
-			self.state = SESSION_DONE
-			self.callDoneHandler(&r)
-			if self.removeFunc != nil {
-				self.removeFunc()
+			if self.state != SESSION_TIMEOUT {
+				self.timer.Stop()
+				self.state = SESSION_DONE
+				self.callDoneHandler(&r)
+				if self.removeFunc != nil {
+					self.removeFunc()
+				}
 			}
 		}
 	}
@@ -271,11 +288,14 @@ func (self *Session) Cleanup() {
 	self.quit <- true
 	rhdl.Printf("waiting for session to close")
 	<-self.done
+	close(self.quit)
 	close(self.done)
-	close(self.progressIntChan)
-	close(self.doneIntChan)
+	self.timer.Stop()
 	//   don't close the channels we give out because this might lead to a panic if
 	//   somebody wites to an already removed session
+	// close(self.cancelIntChan)
+	// close(self.progressIntChan)
+	// close(self.doneIntChan)
 	// close(self.runChan)
 	// close(self.cancelChan)
 	// close(self.addProgressChan)
@@ -289,10 +309,11 @@ func NewSession(ctx *ImportContext, removeFunc func()) (session *Session) {
 	session.removeFunc = removeFunc
 	session.ctx = *ctx
 	session.done = make(chan bool)
+	session.timer = time.NewTimer(10 * time.Second)
 	session.cancelIntChan = make(chan bool, 1)
 	session.progressIntChan = make(chan ProgressData, 10)
 	session.doneIntChan = make(chan ImportResult, 1)
-	session.runChan = make(chan bool, 1)
+	session.runChan = make(chan time.Duration, 1)
 	session.cancelChan = make(chan bool, 1)
 	session.addProgressChan = make(chan sessionAddProgressHandlerRequest, 10)
 	session.addDoneChan = make(chan sessionAddDoneHandlerRequest, 10)
-- 
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