forked from pgaskin/BookBrowser
/
main.go
311 lines (288 loc) · 7.57 KB
/
main.go
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package main
import (
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"net/smtp"
"os"
"os/exec"
"path"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/asdine/storm"
"github.com/asdine/storm/codec/msgpack"
"github.com/asdine/storm/q"
"github.com/google/uuid"
"github.com/jordan-wright/email"
zglob "github.com/mattn/go-zglob"
)
type bookResponse struct {
Books []Book `json:"books"`
TotalCount int `json:"total"`
timestamp time.Time
}
type bookConvertRequest struct {
BookID string `json:"bookid"`
Receiver string `json:"email"`
SMTPServer string `json:"smtpserver"`
SMTPUser string `json:"smtpuser"`
SMTPPassword string `json:"smtppass"`
ConvertToMobi bool `json:"convert"`
}
// User represents a user..
type User struct {
Name string `storm:"id"`
Token string
}
func main() {
envDeletes := os.Getenv("ALLOW_DELETES")
allowDeletes := envDeletes != "" && strings.ToLower(envDeletes) == "true"
bookDir := os.Getenv("BOOK_DIR")
if bookDir == "" {
bookDir = "."
}
dbLocation := os.Getenv("DATABASE_LOCATION")
if dbLocation == "" {
dbLocation = filepath.Join(bookDir, "booksing.db")
}
db, err := storm.Open(dbLocation, storm.Codec(msgpack.Codec), storm.Batch())
if err != nil {
fmt.Println(err.Error())
return
}
defer db.Close()
http.HandleFunc("/convert", func(w http.ResponseWriter, r *http.Request) {
var convert bookConvertRequest
if r.Body == nil {
http.Error(w, "please provide body", 400)
return
}
err := json.NewDecoder(r.Body).Decode(&convert)
if err != nil {
http.Error(w, err.Error(), 400)
return
}
var convertBook Book
err = db.One("ID", convert.BookID, &convertBook)
if err == nil {
go convertAndSendBook(&convertBook, convert)
} else {
fmt.Println(err.Error())
}
fmt.Println(convert.BookID)
})
http.HandleFunc("/refresh", refreshBooks(db, bookDir, allowDeletes))
http.HandleFunc("/books.json", getBooks(db))
http.HandleFunc("/adduser", addUser(db))
http.HandleFunc("/download/", getBook(db))
http.Handle("/", http.FileServer(assetFS()))
fmt.Println("Please visit http://localhost:7132 to view booksing")
log.Fatal(http.ListenAndServe(":7132", nil))
}
func convertAndSendBook(c *Book, req bookConvertRequest) {
var attachment string
fmt.Println("-----------------------------------")
if !c.HasMobi && req.ConvertToMobi {
fmt.Println("first convert the book")
cmd := exec.Command("kindlegen", c.Filepath)
log.Printf("Running command and waiting for it to finish...")
err := cmd.Run()
if err != nil {
log.Printf("Command finished with error: %v", err)
mobiPath := strings.Replace(c.Filepath, ".epub", ".mobi", 1)
cmd := exec.Command("ebook-convert", c.Filepath, mobiPath)
log.Printf("Running command and waiting for it to finish...")
err := cmd.Run()
if err != nil {
log.Printf("Command finished with error: %v", err)
} else {
c.HasMobi = true
}
} else {
c.HasMobi = true
}
}
if c.HasMobi && req.ConvertToMobi {
attachment = strings.Replace(c.Filepath, ".epub", ".mobi", 1)
} else if !req.ConvertToMobi {
attachment = c.Filepath
} else {
fmt.Println("mobi not present but was requested")
return
}
e := email.NewEmail()
e.From = req.SMTPUser
e.To = []string{req.Receiver}
e.Subject = "A booksing book"
e.Text = []byte("")
e.AttachFile(attachment)
err := e.Send(req.SMTPServer+":587", smtp.PlainAuth("", req.SMTPUser, req.SMTPPassword, req.SMTPServer))
if err != nil {
fmt.Println(err.Error())
}
fmt.Println(c)
fmt.Println("-----------------------------------")
}
func getBook(db *storm.DB) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
c, err := r.Cookie("token")
if err != nil || !validToken(db, c.Value) {
http.Error(w, "denied", http.StatusForbidden)
return
}
fileName := r.URL.Query().Get("book")
fmt.Println(c.Value)
fmt.Println("trying to download ", fileName)
var book Book
err = db.One("Filename", fileName, &book)
if err != nil {
return
}
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", path.Base(book.Filepath)))
http.ServeFile(w, r, book.Filepath)
}
}
func validToken(db *storm.DB, cookie string) bool {
if os.Getenv("TOKEN_REQUIRED") != "true" {
return true
}
parts := strings.SplitN(cookie, "_", 2)
if len(parts) != 2 {
return false
}
var user User
err := db.One("Name", parts[0], &user)
if err != nil {
return false
}
return parts[1] == user.Token
}
func addUser(db *storm.DB) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
addr := strings.Split(r.RemoteAddr, ":")[0]
if addr != "127.0.0.1" {
http.Error(w, "denied", http.StatusForbidden)
return
}
username := r.URL.Query().Get("username")
if username == "" {
http.Error(w, "please provide username", http.StatusNotFound)
return
}
token := uuid.New().String()
var user User
user.Name = username
user.Token = token
err := db.Save(&user)
if err != nil {
http.Error(w, "unknown error: "+err.Error(), http.StatusInternalServerError)
return
}
io.WriteString(w, fmt.Sprintf("%s_%s\n", username, token))
}
}
func getBooks(db *storm.DB) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
c, err := r.Cookie("token")
if err != nil || !validToken(db, c.Value) {
http.Error(w, "denied", http.StatusForbidden)
return
}
var resp bookResponse
var book Book
var books []Book
var limit int
numString := r.URL.Query().Get("results")
filter := strings.ToLower(r.URL.Query().Get("filter"))
limit = 1000
if a, err := strconv.Atoi(numString); err == nil {
if a > 0 && a < 1000 {
limit = a
}
}
numResults, err := db.Count(&book)
if err != nil {
fmt.Println(err)
}
resp.TotalCount = numResults
if filter == "" {
err := db.All(&books, storm.Limit(limit))
if err != nil {
fmt.Println(err.Error())
}
} else {
filter = "(?i)" + filter
query := db.Select(q.Or(
q.Re("Author", filter),
q.Re("Title", filter),
)).Limit(limit).OrderBy("Author")
query.Find(&books)
}
resp.Books = books
if len(resp.Books) == 0 {
resp.Books = []Book{}
}
json.NewEncoder(w).Encode(resp)
}
}
func refreshBooks(db *storm.DB, bookDir string, allowDeletes bool) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
log.Println("starting refresh of booklist")
db.Set("status", "current", "indexing books")
matches, err := zglob.Glob(filepath.Join(bookDir, "/**/*.epub"))
if err != nil {
fmt.Println("Scan could not complete: ", err.Error())
return
}
bookQ := make(chan string, len(matches))
resultQ := make(chan int)
for w := 0; w < 5; w++ {
go bookParser(db, bookQ, resultQ, allowDeletes)
}
for _, filename := range matches {
bookQ <- filename
}
for a := 0; a < len(matches); a++ {
<-resultQ
if a > 0 && a%100 == 0 {
fmt.Println("Scraped", a, "books so far")
}
}
db.Set("status", "current", "idle")
log.Println("started refresh of booklist")
}
}
func bookParser(db *storm.DB, bookQ chan string, resultQ chan int, allowDeletes bool) {
for filename := range bookQ {
var dbBook Book
err := db.One("Filepath", filename, &dbBook)
if err == nil {
resultQ <- 1
continue
}
book, err := NewBookFromFile(filename)
if err != nil {
if allowDeletes {
fmt.Println("Deleting ", filename)
os.Remove(filename)
}
resultQ <- 1
continue
}
err = db.One("ID", book.ID, &dbBook)
if err == storm.ErrNotFound {
err = db.Save(book)
if err != nil {
fmt.Println(err)
}
} else if allowDeletes {
fmt.Println("Deleting ", filename)
os.Remove(filename)
}
resultQ <- 1
}
}