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package main
import (
"encoding/json"
"fmt"
"html/template"
"log"
"math/rand"
"net/http"
"os/exec"
"regexp"
"strconv"
"time"
"github.com/boltdb/bolt"
"github.com/gorilla/mux"
"golang.org/x/crypto/bcrypt"
)
const STATIC_FILES_DIR string = "/home/faraz/GoBlog"
type BlogDetails struct {
Blogname string `json:"blogname"`
Website string `json:"website"`
}
func initialize(db *bolt.DB) {
// Handles db/bucket creation
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("UsersBucket")) // email -> password
if err != nil {
return fmt.Errorf("Error with UsersBucket: %s", err)
}
return nil
})
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("CookieBucket")) // random string -> email
if err != nil {
return fmt.Errorf("Error with CookieBucket: %s", err)
}
return nil
})
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("BlogMappingBucket")) // random string -> email
if err != nil {
return fmt.Errorf("Error with BlogMappingBucket: %s", err)
}
return nil
})
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("UserToBlog")) // user -> blogdetails
if err != nil {
return fmt.Errorf("Error with UserToBlog: %s", err)
}
return nil
})
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("PortBucket")) // port -> blog
if err != nil {
return fmt.Errorf("Error with PortBucket: %s", err)
}
return nil
})
}
func LoginPage(db *bolt.DB, w http.ResponseWriter, req *http.Request) {
username := getUser(db, w, req)
if username == "" {
baseT := template.Must(template.New("base").Parse(base))
baseT = template.Must(baseT.Parse(login))
baseT.ExecuteTemplate(w, "base", map[string]string{
"PageName": "login",
"User": getUser(db, w, req),
})
} else {
http.Redirect(w, req, "/admin", http.StatusFound)
}
}
func LoginHandler(db *bolt.DB, w http.ResponseWriter, req *http.Request) {
email := req.FormValue("email")
password := req.FormValue("password")
if verifyUser(db, w, req, email, password) {
http.Redirect(w, req, "/admin", http.StatusFound)
} else {
http.Redirect(w, req, "/error/Invalid email or password", http.StatusFound)
}
}
func LogoutHandler(db *bolt.DB, w http.ResponseWriter, req *http.Request) {
cookie, err := req.Cookie("goblog")
if err != nil {
fmt.Println(err)
}
delete := http.Cookie{Name: "goblog", Value: "delete", Expires: time.Now(), HttpOnly: true, Path: "/"}
http.SetCookie(w, &delete)
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("CookieBucket"))
err := b.Delete([]byte(cookie.Value))
return err
})
http.Redirect(w, req, "/", http.StatusFound)
}
func MainPage(db *bolt.DB, w http.ResponseWriter, r *http.Request) {
username := getUser(db, w, r)
if username == "" {
baseT := template.Must(template.New("base").Parse(newMainPage))
baseT.ExecuteTemplate(w, "base", map[string]string{
"PageName": "main",
"User": getUser(db, w, r),
})
} else {
http.Redirect(w, r, "/admin", http.StatusFound)
}
}
func ErrorPage(db *bolt.DB, w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
errorcode := vars["errorcode"]
baseT := template.Must(template.New("base").Parse(base))
baseT = template.Must(baseT.Parse(errorPage))
baseT.ExecuteTemplate(w, "base", map[string]string{
"PageName": "error",
"User": getUser(db, w, r),
"Error": errorcode,
})
}
func SignupPage(db *bolt.DB, w http.ResponseWriter, r *http.Request) {
baseT := template.Must(template.New("base").Parse(base))
baseT = template.Must(baseT.Parse(signup))
baseT.ExecuteTemplate(w, "base", map[string]string{
"PageName": "signup",
"User": getUser(db, w, r),
})
}
func SignupHandler(db *bolt.DB, w http.ResponseWriter, r *http.Request) {
email := r.FormValue("email")
password := r.FormValue("password")
if addUser(db, email, password) {
cookie := http.Cookie{Name: "goblog", Value: RandomString(), Expires: time.Now().Add(time.Hour * 24 * 7 * 52), HttpOnly: true, MaxAge: 50000, Path: "/"}
http.SetCookie(w, &cookie)
var err error
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("CookieBucket"))
err = b.Put([]byte(cookie.Value), []byte(email))
return err
})
if err != nil {
fmt.Println(err)
}
http.Redirect(w, r, "/admin", http.StatusFound)
} else {
fmt.Println("Failure!")
http.Redirect(w, r, "/signup", http.StatusFound)
}
}
func AdminPage(db *bolt.DB, w http.ResponseWriter, r *http.Request) {
success := r.FormValue("success")
username := getUser(db, w, r)
if username != "" {
baseT := template.Must(template.New("base").Parse(base))
baseT = template.Must(baseT.Parse(admin))
baseT.ExecuteTemplate(w, "base", map[string]interface{}{
"PageName": "admin",
"User": username,
"Blogs": getBlogsForUser(db, username),
"Success": success,
})
} else {
http.Redirect(w, r, "/error/You must be authenticated!", http.StatusFound)
}
}
func BlogCreationHandler(db *bolt.DB, w http.ResponseWriter, r *http.Request) {
blogname := r.FormValue("blogname")
// db.Update(func(tx *bolt.Tx) error {
// b := tx.Bucket([]byte("PortBucket"))
// port, _ = b.NextSequence()
// return err
// })
// if err != nil {
// fmt.Println(err)
// }
// If for some reason autoincrementing doesn't work, resort to traditional method.
seed := rand.NewSource(time.Now().UnixNano())
rng := rand.New(seed)
port := rng.Intn(63000) + 2000
/*
website, err := checkUrl(websiteOriginal)
if err != nil {
http.Redirect(w, r, fmt.Sprintf("/error/%s is not a valid url", websiteOriginal), http.StatusFound)
return
}
*/
re := regexp.MustCompile("[^A-Za-z]")
blogname = re.ReplaceAllString(blogname, "")
website := blogname + ".goblog.pw"
blogcheck := []byte("")
username := getUser(db, w, r)
if username != "" {
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("BlogMappingBucket"))
blogcheck = b.Get([]byte(blogname))
return nil
})
if blogcheck == nil && len(blogname) >= 1 {
create, err := exec.Command("./create.sh", blogname, website, strconv.Itoa(port)).Output()
if err != nil {
http.Redirect(w, r, "/error/Server error, please try again later.", http.StatusFound)
} else {
fmt.Println("80 -> " + strconv.Itoa(port))
fmt.Println(string(create))
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("BlogMappingBucket"))
err := b.Put([]byte(blogname), []byte(website))
return err
})
if err != nil {
fmt.Println(err)
}
addBlogToUser(db, username, blogname, website)
blogname = ""
http.Redirect(w, r, "/", http.StatusFound)
return
}
} else if blogcheck != nil && blogname != "" {
http.Redirect(w, r, "/error/Blog already exists!", http.StatusFound)
return
} else {
http.Redirect(w, r, "/", http.StatusFound)
return
}
} else {
http.Redirect(w, r, "/error/You must be authenticated!", http.StatusFound)
return
}
}
func addBlogToUser(db *bolt.DB, username string, blogname string, website string) {
existingblogs := []byte("")
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("UserToBlog"))
existingblogs = b.Get([]byte(username))
return nil
})
var v []BlogDetails = make([]BlogDetails, 0)
json.Unmarshal(existingblogs, &v)
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("UserToBlog"))
v = append(v, BlogDetails{blogname, website})
m, _ := json.Marshal(v)
err := b.Put([]byte(username), m)
return err
})
}
func getBlogsForUser(db *bolt.DB, username string) []BlogDetails {
existingblogs := []byte("")
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("UserToBlog"))
existingblogs = b.Get([]byte(username))
return nil
})
var v []BlogDetails = make([]BlogDetails, 0)
json.Unmarshal(existingblogs, &v)
return v
}
func verifyUser(db *bolt.DB, w http.ResponseWriter, r *http.Request, email string, password string) bool {
correctpass := []byte("")
inputpass := []byte(password)
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("UsersBucket"))
correctpass = b.Get([]byte(email))
return nil
})
if bcrypt.CompareHashAndPassword(correctpass, inputpass) == nil {
cookie := http.Cookie{Name: "goblog", Value: RandomString(), Expires: time.Now().Add(time.Hour * 24 * 7 * 52), HttpOnly: true, MaxAge: 50000, Path: "/"}
http.SetCookie(w, &cookie)
var err error
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("CookieBucket"))
err = b.Put([]byte(cookie.Value), []byte(email))
return err
})
if err != nil {
fmt.Println(err)
}
return true
}
return false
}
func addUser(db *bolt.DB, email string, password string) bool {
check := []byte("")
hashedPass, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
fmt.Println(err)
}
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("UsersBucket"))
check = b.Get([]byte(email))
return nil
})
if check == nil {
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("UsersBucket"))
err := b.Put([]byte(email), []byte(hashedPass))
return err
})
if err != nil {
fmt.Println(err)
}
return true
} else {
return false
}
}
// http://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-golang
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
const (
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
var src = rand.NewSource(time.Now().UnixNano())
func RandomString() string {
b := make([]byte, 20)
for i, cache, remain := 20-1, src.Int63(), letterIdxMax; i >= 0; {
if remain == 0 {
cache, remain = src.Int63(), letterIdxMax
}
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
b[i] = letterBytes[idx]
i--
}
cache >>= letterIdxBits
remain--
}
return string(b)
}
func getUser(db *bolt.DB, w http.ResponseWriter, r *http.Request) string {
cookie, _ := r.Cookie("goblog")
if cookie != nil {
return getUserFromCookie(db, cookie.Value)
}
return ""
}
func getUserFromCookie(db *bolt.DB, value string) string {
servervalue := []byte("")
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("CookieBucket"))
servervalue = b.Get([]byte(value))
return nil
})
if servervalue != nil {
return string(servervalue)
}
return ""
}
//func checkUrl(s string) (string, error) {
// u, err := url.Parse(s)
// if err != nil || u.Host == "" {
// u, err = url.Parse("http://" + s)
// }
// return u.Host, err
//}
func main() {
db, err := bolt.Open("goblog.db", 0600, nil)
if err != nil {
fmt.Println(err)
}
defer db.Close()
initialize(db)
fmt.Println("Started server on port 1337")
router := mux.NewRouter()
router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
MainPage(db, w, r)
}).Methods("GET")
router.HandleFunc("/login", func(w http.ResponseWriter, r *http.Request) {
LoginPage(db, w, r)
}).Methods("GET")
router.HandleFunc("/login", func(w http.ResponseWriter, r *http.Request) {
LoginHandler(db, w, r)
}).Methods("POST")
router.HandleFunc("/signup", func(w http.ResponseWriter, r *http.Request) {
SignupPage(db, w, r)
}).Methods("GET")
router.HandleFunc("/signup", func(w http.ResponseWriter, r *http.Request) {
SignupHandler(db, w, r)
}).Methods("POST")
router.HandleFunc("/admin", func(w http.ResponseWriter, r *http.Request) {
AdminPage(db, w, r)
}).Methods("GET")
router.HandleFunc("/admin", func(w http.ResponseWriter, r *http.Request) {
BlogCreationHandler(db, w, r)
}).Methods("POST")
router.HandleFunc("/logout", func(w http.ResponseWriter, r *http.Request) {
LogoutHandler(db, w, r)
}).Methods("GET", "POST")
router.HandleFunc("/error/{errorcode}", func(w http.ResponseWriter, r *http.Request) {
ErrorPage(db, w, r)
}).Methods("GET")
router.PathPrefix("/css/{css}").Handler(http.StripPrefix("/css/", http.FileServer(http.Dir(STATIC_FILES_DIR+"/css/"))))
router.PathPrefix("/js/{js}").Handler(http.StripPrefix("/js/", http.FileServer(http.Dir(STATIC_FILES_DIR+"/js/"))))
router.PathPrefix("/img/{img}").Handler(http.StripPrefix("/img/", http.FileServer(http.Dir(STATIC_FILES_DIR+"/img/"))))
router.PathPrefix("/fonts/{fonts}").Handler(http.StripPrefix("/fonts/", http.FileServer(http.Dir(STATIC_FILES_DIR+"/fonts/"))))
log.Fatal(http.ListenAndServe(":1337", router))
}
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