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main.go
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main.go
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package main
import (
"flag"
"fmt"
"net/url"
"os"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/hbakhtiyor/grab"
)
var (
inProgress = 0
failed = 0
succeeded = 0
)
func main() {
// Download/upload files via wetransfer.com
programName := os.Args[0]
messageFlag := flag.String("m", "", "Message description for the transfer.")
fromFlag := flag.String("f", "", "Sender email.")
toFlag := flag.String("t", "", "Recipient emails. Separate with comma(,)")
printFlag := flag.Bool("p", false, "Only print the direct link (without downloading it)")
limitParallelFlag := flag.Int("l", runtime.NumCPU(), "Parallel limit for uploading/downloading files")
flag.Parse()
if flag.NArg() < 1 {
fmt.Printf("Usage: %s [file] ... [url] ...\n", programName)
flag.PrintDefaults()
return
}
filePaths, fileNames, rawURLs := getResources(flag.Args())
if len(filePaths) == 0 && len(rawURLs) == 0 {
fmt.Printf("%s: %s\n", programName, "There are no file(s)/url(s) to upload/download")
}
// Files to download
if len(rawURLs) > 0 {
if *printFlag {
fmt.Println(getDownloadLinks(rawURLs))
} else {
err := downloadFiles(rawURLs, *limitParallelFlag)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %v\n", programName, err)
os.Exit(1)
}
}
}
// Files to upload
if len(filePaths) > 0 {
result, err := UploadFile(filePaths, fileNames, *messageFlag, *fromFlag, strings.Split(*toFlag, ","), *limitParallelFlag)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %v\n", programName, err)
os.Exit(1)
}
// TODO [Copied to clipboard]
// https://github.com/atotto/clipboard ?
fmt.Printf("\n%s: %v\n", programName, result.ShortenedURL)
}
}
func getResources(URIs []string) (filePaths []string, fileNames []string, rawURLs []string) {
for _, uri := range URIs {
if IsValidURL(uri) {
found := false
for _, f := range rawURLs {
if f == uri {
found = true
break
}
}
if !found {
rawURLs = append(rawURLs, uri)
}
} else {
// Check that all files exists
if stat, err := os.Stat(uri); os.IsNotExist(err) {
fmt.Printf("%s doesn't exist, ignoring...\n", uri)
} else if stat.Size() == 0 {
fmt.Printf("%s is empty, ignoring...\n", uri)
} else {
fileName := filepath.Base(uri)
// Check that there are no duplicates filenames,
// despite possible different dirname
found := false
for _, f := range fileNames {
if f == fileName {
found = true
break
}
}
if !found {
fileNames = append(fileNames, fileName)
filePaths = append(filePaths, uri)
}
}
}
}
return
}
// DownloadFiles download files from the given a `we.tl/', `wetransfer.com/downloads/', or any URLs.
//
// First a direct link is retrieved (via GetDirectLink()), the filename will
// be extracted to it and it will be fetched and stored on the current
// working directory.
func downloadFiles(rawURLs []string, workers int) error {
directLinks := getDownloadLinks(rawURLs)
if len(directLinks) == 0 {
return fmt.Errorf("There are no url(s) to download\n")
}
fmt.Printf("Downloading %d files...\n", len(directLinks))
respch, err := grab.GetBatch(workers, ".", directLinks...)
if err != nil {
return err
}
// monitor downloads
responses := make([]*grab.Response, 0, len(directLinks))
t := time.NewTicker(200 * time.Millisecond)
defer t.Stop()
for {
select {
case resp := <-respch:
if resp != nil {
// a new response has been received and has started downloading
responses = append(responses, resp)
} else {
// channel is closed - all downloads are complete
updateUI(responses)
fmt.Printf(
"Finished %d successful, %d failed, %d incomplete.\n",
succeeded,
failed,
inProgress)
return nil
}
case <-t.C:
// update UI every 200ms
updateUI(responses)
}
}
}
func getDownloadLinks(rawURLs []string) []string {
directLinks := []string{}
for _, rawURL := range rawURLs {
directLink := rawURL
URL, err := url.Parse(rawURL)
if err != nil {
failed++
fmt.Fprintf(os.Stderr, "Error downloading %s: %v\n", rawURL, err)
continue
}
hostName := URL.Hostname()
if hostName == "we.tl" || hostName == "wetransfer.com" {
// TODO make it run in concurrency
directLink, err = GetDirectLink(rawURL)
if err != nil {
failed++
fmt.Fprintf(os.Stderr, "Error downloading %s: %v\n", rawURL, err)
continue
}
}
directLinks = append(directLinks, directLink)
}
return directLinks
}
// updateUI prints the progress of all downloads to the terminal
func updateUI(responses []*grab.Response) {
// clear lines for incomplete downloads
if inProgress > 0 {
fmt.Printf("\033[%dA\033[K", inProgress)
}
// print newly completed downloads
for i, resp := range responses {
if resp != nil && resp.IsComplete() {
if resp.Err() != nil {
failed++
fmt.Fprintf(os.Stderr, "Error downloading %s: %v\n",
resp.Request.URL(),
resp.Err())
} else {
succeeded++
fmt.Printf("Finished %s %d / %d bytes (%d%%)\n",
resp.Filename,
resp.BytesComplete(),
resp.Size,
int(100*resp.Progress()))
}
responses[i] = nil
}
}
// print progress for incomplete downloads
inProgress = 0
for _, resp := range responses {
if resp != nil {
fmt.Printf("Downloading %s %d / %d bytes (%d%%) - %.02fKBp/s ETA: %ds \033[K\n",
resp.Filename,
resp.BytesComplete(),
resp.Size,
int(100*resp.Progress()),
resp.BytesPerSecond()/1024,
int64(resp.ETA().Sub(time.Now()).Seconds()))
inProgress++
}
}
}