wide/session/users.go

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// Copyright (c) 2014, B3log
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//
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// 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
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// 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.
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package session
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import (
"encoding/json"
"math/rand"
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"net/http"
"os"
"path/filepath"
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"runtime"
"strconv"
"text/template"
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"sync"
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"github.com/b3log/wide/conf"
"github.com/b3log/wide/i18n"
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"github.com/b3log/wide/util"
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"github.com/golang/glog"
)
const (
UserExists = "user exists"
UserCreated = "user created"
UserCreateError = "user create error"
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)
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// Exclusive lock for adding user.
var addUserMutex sync.Mutex
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// PreferenceHandle handles request of preference page.
func PreferenceHandler(w http.ResponseWriter, r *http.Request) {
httpSession, _ := HTTPSession.Get(r, "wide-session")
if httpSession.IsNew {
http.Redirect(w, r, "/preference", http.StatusFound)
return
}
httpSession.Options.MaxAge = conf.Wide.HTTPSessionMaxAge
httpSession.Save(r, w)
username := httpSession.Values["username"].(string)
user := conf.Wide.GetUser(username)
if "GET" == r.Method {
model := map[string]interface{}{"conf": conf.Wide, "i18n": i18n.GetAll(user.Locale), "user": user,
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"ver": conf.WideVersion, "goos": runtime.GOOS, "goarch": runtime.GOARCH, "gover": runtime.Version(),
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"locales": i18n.GetLocalesNames(), "gofmts": util.Go.GetGoFormats()}
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t, err := template.ParseFiles("views/preference.html")
if nil != err {
glog.Error(err)
http.Error(w, err.Error(), 500)
return
}
t.Execute(w, model)
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return
}
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// non-GET request as save request
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succ := true
data := map[string]interface{}{"succ": &succ}
defer util.RetJSON(w, r, data)
args := struct {
FontFamily string
FontSize string
EditorFontFamily string
EditorFontSize string
EditorLineHeight string
GoFmt string
Workspace string
Username string
Password string
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Locale string
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}{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
succ = false
return
}
user.FontFamily = args.FontFamily
user.FontSize = args.FontSize
user.Editor.FontFamily = args.EditorFontFamily
user.Editor.FontSize = args.EditorFontSize
user.Editor.LineHeight = args.EditorLineHeight
user.GoFormat = args.GoFmt
user.Workspace = args.Workspace
user.Password = args.Password
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user.Locale = args.Locale
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conf.UpdateCustomizedConf(username)
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succ = conf.Save()
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}
// LoginHandler handles request of user login.
func LoginHandler(w http.ResponseWriter, r *http.Request) {
if "GET" == r.Method {
// show the login page
model := map[string]interface{}{"conf": conf.Wide, "i18n": i18n.GetAll(conf.Wide.Locale),
"locale": conf.Wide.Locale, "ver": conf.WideVersion}
t, err := template.ParseFiles("views/login.html")
if nil != err {
glog.Error(err)
http.Error(w, err.Error(), 500)
return
}
t.Execute(w, model)
return
}
// non-GET request as login request
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succ := true
data := map[string]interface{}{"succ": &succ}
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defer util.RetJSON(w, r, data)
args := struct {
Username string
Password string
}{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
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glog.Error(err)
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succ = false
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return
}
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succ = false
for _, user := range conf.Wide.Users {
if user.Name == args.Username && user.Password == args.Password {
succ = true
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break
}
}
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if !succ {
return
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}
// create a HTTP session
httpSession, _ := HTTPSession.Get(r, "wide-session")
httpSession.Values["username"] = args.Username
httpSession.Values["id"] = strconv.Itoa(rand.Int())
httpSession.Options.MaxAge = conf.Wide.HTTPSessionMaxAge
httpSession.Save(r, w)
glog.Infof("Created a HTTP session [%s] for user [%s]", httpSession.Values["id"].(string), args.Username)
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}
// LogoutHandler handles request of user logout (exit).
func LogoutHandler(w http.ResponseWriter, r *http.Request) {
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data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
httpSession, _ := HTTPSession.Get(r, "wide-session")
httpSession.Options.MaxAge = -1
httpSession.Save(r, w)
}
// SignUpUser handles request of registering user.
func SignUpUser(w http.ResponseWriter, r *http.Request) {
if "GET" == r.Method {
// show the user sign up page
firstUserWorkspace := conf.Wide.GetUserWorkspace(conf.Wide.Users[0].Name)
dir := filepath.Dir(firstUserWorkspace)
model := map[string]interface{}{"conf": conf.Wide, "i18n": i18n.GetAll(conf.Wide.Locale),
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"locale": conf.Wide.Locale, "ver": conf.WideVersion, "dir": dir,
"pathSeparator": conf.PathSeparator}
t, err := template.ParseFiles("views/sign_up.html")
if nil != err {
glog.Error(err)
http.Error(w, err.Error(), 500)
return
}
t.Execute(w, model)
return
}
// non-GET request as add user request
succ := true
data := map[string]interface{}{"succ": &succ}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
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if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
succ = false
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return
}
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username := args["username"].(string)
password := args["password"].(string)
msg := addUser(username, password)
if UserCreated != msg {
succ = false
data["msg"] = msg
}
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}
// addUser add a user with the specified username and password.
//
// 1. create the user's workspace
// 2. generate 'Hello, 世界' demo code in the workspace
// 3. update the user customized configurations, such as style.css
// 4. serve files of the user's workspace via HTTP
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func addUser(username, password string) string {
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addUserMutex.Lock()
defer addUserMutex.Unlock()
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for _, user := range conf.Wide.Users {
if user.Name == username {
return UserExists
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}
}
firstUserWorkspace := conf.Wide.GetUserWorkspace(conf.Wide.Users[0].Name)
dir := filepath.Dir(firstUserWorkspace)
workspace := filepath.Join(dir, username)
newUser := &conf.User{Name: username, Password: password, Workspace: workspace,
Locale: conf.Wide.Locale, GoFormat: "gofmt", FontFamily: "Helvetica", FontSize: "13px",
Editor: &conf.Editor{FontFamily: "Consolas, 'Courier New', monospace", FontSize: "inherit"}}
conf.Wide.Users = append(conf.Wide.Users, newUser)
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if !conf.Save() {
return UserCreateError
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}
conf.CreateWorkspaceDir(workspace)
helloWorld(workspace)
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conf.UpdateCustomizedConf(username)
http.Handle("/workspace/"+username+"/",
http.StripPrefix("/workspace/"+username+"/", http.FileServer(http.Dir(newUser.GetWorkspace()))))
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glog.Infof("Created a user [%s]", username)
return UserCreated
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}
// helloWorld generates the 'Hello, 世界' source code in workspace/src/hello/main.go.
func helloWorld(workspace string) {
dir := workspace + conf.PathSeparator + "src" + conf.PathSeparator + "hello"
if err := os.MkdirAll(dir, 0755); nil != err {
glog.Error(err)
return
}
fout, err := os.Create(dir + conf.PathSeparator + "main.go")
if nil != err {
glog.Error(err)
os.Exit(-1)
}
fout.WriteString(`package main
import "fmt"
func main() {
fmt.Println("Hello, 世界")
}
`)
fout.Close()
}