From 46ae2f5c6db5897c00d75ce8d29cc0ad55b7b613 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Tue, 29 Dec 2015 02:38:25 +0100
Subject: improved error handling for session store


diff --git a/session.go b/session.go
index 71251f1..94ce66a 100644
--- a/session.go
+++ b/session.go
@@ -190,7 +190,7 @@ func (self *Session) dispatchRequests() {
 				self.cancel()
 			}
 			self.state = SESSION_TIMEOUT
-			r := &ImportResult{500, "timeout", 0, 0}
+			r := &ImportResult{500, "session timed out", 0, 0}
 			self.callDoneHandler(r)
 			if self.removeFunc != nil {
 				self.removeFunc()
diff --git a/session_store.go b/session_store.go
index 43b5d23..b7ea3d9 100644
--- a/session_store.go
+++ b/session_store.go
@@ -28,13 +28,15 @@ import (
 	"encoding/base32"
 	"fmt"
 	"github.com/satori/go.uuid"
+	"net/http"
 	"strings"
 )
 
 type newSessionResponse struct {
-	id      string
-	session *SessionChan
-	err     error
+	id           string
+	session      *SessionChan
+	responsecode int
+	errorstring  string
 }
 
 type newSessionRequest struct {
@@ -43,8 +45,9 @@ type newSessionRequest struct {
 }
 
 type getSessionResponse struct {
-	session *SessionChan
-	err     error
+	session      *SessionChan
+	responsecode int
+	errorstring  string
 }
 
 type getSessionRequest struct {
@@ -54,7 +57,8 @@ type getSessionRequest struct {
 }
 
 type removeSessionResponse struct {
-	err error
+	responsecode int
+	errorstring  string
 }
 
 type removeSessionRequest struct {
@@ -73,12 +77,16 @@ type SessionStore struct {
 }
 
 func (self *SessionStore) new(ctx *ImportContext) (resp newSessionResponse) {
+	resp.responsecode = http.StatusOK
+	resp.errorstring = "OK"
 	if !ctx.Trusted {
 		if ok, err := ctx.rddb.CheckPassword(ctx.UserName, ctx.Password); err != nil {
-			resp.err = err
+			resp.responsecode = http.StatusInternalServerError
+			resp.errorstring = err.Error()
 			return
 		} else if !ok {
-			resp.err = fmt.Errorf("invalid username and/or password")
+			resp.responsecode = http.StatusUnauthorized
+			resp.errorstring = "invalid username and/or password"
 			return
 		}
 	}
@@ -94,15 +102,20 @@ func (self *SessionStore) new(ctx *ImportContext) (resp newSessionResponse) {
 }
 
 func (self *SessionStore) get(user, id string) (resp getSessionResponse) {
+	resp.responsecode = http.StatusOK
+	resp.errorstring = "OK"
 	if session, exists := self.store[user][id]; exists {
 		resp.session = session.getInterface()
 	} else {
-		resp.err = fmt.Errorf("SessionStore: session '%s/%s' not found", user, id)
+		resp.responsecode = http.StatusNotFound
+		resp.errorstring = fmt.Sprintf("SessionStore: session '%s/%s' not found", user, id)
 	}
 	return
 }
 
 func (self *SessionStore) remove(user, id string) (resp removeSessionResponse) {
+	resp.responsecode = http.StatusOK
+	resp.errorstring = "OK"
 	if session, exists := self.store[user][id]; exists {
 		go session.Cleanup() // cleanup could take a while -> don't block all the other stuff
 		delete(self.store[user], id)
@@ -114,7 +127,8 @@ func (self *SessionStore) remove(user, id string) (resp removeSessionResponse) {
 			}
 		}
 	} else {
-		resp.err = fmt.Errorf("SessionStore: session '%s/%s' not found", user, id)
+		resp.responsecode = http.StatusNotFound
+		resp.errorstring = fmt.Sprintf("SessionStore: session '%s/%s' not found", user, id)
 	}
 	return
 }
@@ -144,7 +158,7 @@ type SessionStoreChan struct {
 	removeChan chan<- removeSessionRequest
 }
 
-func (self *SessionStoreChan) New(ctx *ImportContext) (string, *SessionChan, error) {
+func (self *SessionStoreChan) New(ctx *ImportContext) (string, *SessionChan, int, string) {
 	res_ch := make(chan newSessionResponse)
 	req := newSessionRequest{}
 	req.ctx = ctx
@@ -152,13 +166,10 @@ func (self *SessionStoreChan) New(ctx *ImportContext) (string, *SessionChan, err
 	self.newChan <- req
 
 	res := <-res_ch
-	if res.err != nil {
-		return "", nil, res.err
-	}
-	return res.id, res.session, nil
+	return res.id, res.session, res.responsecode, res.errorstring
 }
 
-func (self *SessionStoreChan) Get(user, id string) (*SessionChan, error) {
+func (self *SessionStoreChan) Get(user, id string) (*SessionChan, int, string) {
 	res_ch := make(chan getSessionResponse)
 	req := getSessionRequest{}
 	req.user = user
@@ -167,13 +178,10 @@ func (self *SessionStoreChan) Get(user, id string) (*SessionChan, error) {
 	self.getChan <- req
 
 	res := <-res_ch
-	if res.err != nil {
-		return nil, res.err
-	}
-	return res.session, nil
+	return res.session, res.responsecode, res.errorstring
 }
 
-func (self *SessionStoreChan) Remove(user, id string) error {
+func (self *SessionStoreChan) Remove(user, id string) (int, string) {
 	res_ch := make(chan removeSessionResponse)
 	req := removeSessionRequest{}
 	req.user = user
@@ -182,7 +190,7 @@ func (self *SessionStoreChan) Remove(user, id string) error {
 	self.removeChan <- req
 
 	res := <-res_ch
-	return res.err
+	return res.responsecode, res.errorstring
 }
 
 func (self *SessionStore) GetInterface() *SessionStoreChan {
-- 
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