sanitize filename to prevent 0kb files (fixes #3)

Author: laureanray

go.mod

@@ -4,6 +4,7 @@ go 1.18
 
 require (
 	github.com/PuerkitoBio/goquery v1.8.0
+	github.com/kennygrant/sanitize v1.2.4
 	github.com/manifoldco/promptui v0.9.0
 	github.com/schollz/progressbar/v3 v3.8.6
 	github.com/spf13/cobra v1.4.0

go.sum

@@ -15,6 +15,8 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213/go.mod h1:vNUNkEQ1e29fT/6vq2aBdFsgNPmy8qMdSay1npru+Sw=
+github.com/kennygrant/sanitize v1.2.4 h1:gN25/otpP5vAsO2djbMhF/LQX6R7+O1TB4yv8NzpJ3o=
+github.com/kennygrant/sanitize v1.2.4/go.mod h1:LGsjYYtgxbetdg5owWB2mpgUL6e2nfw2eObZ0u0qvak=
 github.com/manifoldco/promptui v0.9.0 h1:3V4HzJk1TtXW1MTZMP7mdlwbBpIinw3HztaIlYthEiA=
 github.com/manifoldco/promptui v0.9.0/go.mod h1:ka04sppxSGFAtxX0qhlYQjISsg9mR4GWtQEhdbn6Pgg=
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=

pkg/api/libgen.go

@@ -3,6 +3,7 @@ package api
 import (
 	"fmt"
 	"github.com/PuerkitoBio/goquery"
+	"github.com/kennygrant/sanitize"
 	"github.com/schollz/progressbar/v3"
 	"io"
 	"log"
@@ -248,8 +249,8 @@ func SearchBookByTitle(query string, limit int, libgenSite Site) ([]Book, error)
 
 // DownloadSelection Downloads the file to current working directory
 func DownloadSelection(selectedBook Book, libgenType Site) {
-	log.Println("Initializing download")
 	link := getDirectDownloadLink(selectedBook.Mirrors[0], libgenType)
+	log.Println("Initializing download " + link)
 	req, _ := http.NewRequest("GET", link, nil)
 	resp, error := http.DefaultClient.Do(req)
 
@@ -258,14 +259,21 @@ func DownloadSelection(selectedBook Book, libgenType Site) {
 	}
 
 	defer resp.Body.Close()
-	f, _ := os.OpenFile(strings.Trim(selectedBook.Title, " ")+"."+selectedBook.Extension, os.O_CREATE|os.O_WRONLY, 0644)
+	filename := sanitize.Path(strings.Trim(selectedBook.Title, " ") + "." + selectedBook.Extension)
+
+	f, _ := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY, 0666)
 	defer f.Close()
 
 	bar := progressbar.DefaultBytes(
 		resp.ContentLength,
 		"Downloading",
 	)
-	io.Copy(io.MultiWriter(f, bar), resp.Body)
 
-	log.Println("File successfully downloaded:", f.Name())
+	bytes, err := io.Copy(io.MultiWriter(f, bar), resp.Body)
+
+	if bytes == 0 || err != nil {
+		log.Println(bytes, err)
+	} else {
+		log.Println("File successfully downloaded:", f.Name())
+	}
 }